Merge pull request #2681 from dpalou/MOBILE-3651

Mobile 3651

src/addons/addons.module.ts

@@ -24,6 +24,8 @@ import { AddonNotificationsModule } from './notifications/notifications.module';
 import { AddonMessageOutputModule } from './messageoutput/messageoutput.module';
 import { AddonMessagesModule } from './messages/messages.module';
 import { AddonModModule } from './mod/mod.module';
+import { AddonQbehaviourModule } from './qbehaviour/qbehaviour.module';
+import { AddonQtypeModule } from './qtype/qtype.module';
 
 @NgModule({
     imports: [
@@ -37,6 +39,8 @@ import { AddonModModule } from './mod/mod.module';
         AddonNotificationsModule,
         AddonMessageOutputModule,
         AddonModModule,
+        AddonQbehaviourModule,
+        AddonQtypeModule,
     ],
 })
 export class AddonsModule {}

src/addons/block/recentlyaccesseditems/components/recentlyaccesseditems/addon-block-recentlyaccesseditems.html

@@ -6,7 +6,7 @@
         <div *ngFor="let item of items">
             <ion-card>
                 <ion-item class="core-course-module-handler item-media ion-text-wrap" detail="false" (click)="action($event, item)"
-                    [title]="item.name">
+                    [title]="item.name" button>
                     <img slot="start" [src]="item.iconUrl" alt="" role="presentation" *ngIf="item.iconUrl" class="core-module-icon">
                     <ion-label>
                         <h2>

src/addons/block/recentlyaccesseditems/services/block-handler.ts

@@ -30,7 +30,6 @@ export class AddonBlockRecentlyAccessedItemsHandlerService extends CoreBlockBase
     /**
      * Returns the data needed to render the block.
      *
-     * @param injector Injector.
      * @param block The block to render.
      * @param contextLevel The context where the block will be used.
      * @param instanceId The instance ID associated with the context level.

src/addons/calendar/services/calendar-sync.ts

@@ -53,7 +53,7 @@ export class AddonCalendarSyncProvider extends CoreSyncBaseProvider<AddonCalenda
      * @return Promise resolved if sync is successful, rejected if sync fails.
      */
     async syncAllEvents(siteId?: string, force = false): Promise<void> {
-        await this.syncOnSites('all calendar events', this.syncAllEventsFunc.bind(this, [force]), siteId);
+        await this.syncOnSites('all calendar events', this.syncAllEventsFunc.bind(this, force), siteId);
     }
 
     /**

src/addons/messages/services/messages-sync.ts

@@ -74,17 +74,17 @@ export class AddonMessagesSyncProvider extends CoreSyncBaseProvider<AddonMessage
     syncAllDiscussions(siteId?: string, onlyDeviceOffline: boolean = false): Promise<void> {
         const syncFunctionLog = 'all discussions' + (onlyDeviceOffline ? ' (Only offline)' : '');
 
-        return this.syncOnSites(syncFunctionLog, this.syncAllDiscussionsFunc.bind(this, [onlyDeviceOffline]), siteId);
+        return this.syncOnSites(syncFunctionLog, this.syncAllDiscussionsFunc.bind(this, onlyDeviceOffline), siteId);
     }
 
     /**
      * Get all messages pending to be sent in the site.
      *
-     * @param siteId Site ID to sync. If not defined, sync all sites.
      * @param onlyDeviceOffline True to only sync discussions that failed because device was offline.
+     * @param siteId Site ID to sync. If not defined, sync all sites.
      * @param Promise resolved if sync is successful, rejected if sync fails.
      */
-    protected async syncAllDiscussionsFunc(siteId: string, onlyDeviceOffline = false): Promise<void> {
+    protected async syncAllDiscussionsFunc(onlyDeviceOffline: boolean, siteId: string): Promise<void> {
         const userIds: number[] = [];
         const conversationIds: number[] = [];
         const promises: Promise<void>[] = [];

src/addons/messages/services/messages.ts

@@ -897,10 +897,7 @@ export class AddonMessagesProvider {
     ): Promise<{members: AddonMessagesConversationMember[]; canLoadMore: boolean}> {
         const site = await CoreSites.instance.getSite(siteId);
         userId = userId || site.getUserId();
-
+        limitTo = limitTo ?? AddonMessagesProvider.LIMIT_MESSAGES;
-        if (typeof limitTo == 'undefined' || limitTo === null) {
-            limitTo = AddonMessagesProvider.LIMIT_MESSAGES;
-        }
 
         const preSets: CoreSiteWSPreSets = {
             cacheKey: this.getCacheKeyForConversationMembers(userId, conversationId),
@@ -948,11 +945,9 @@ export class AddonMessagesProvider {
 
         options.userId = options.userId || site.getUserId();
         options.limitFrom = options.limitFrom || 0;
-        options.limitTo = options.limitTo === undefined || options.limitTo === null
+        options.limitTo = options.limitTo ?? AddonMessagesProvider.LIMIT_MESSAGES;
-            ? AddonMessagesProvider.LIMIT_MESSAGES
-            : options.limitTo;
         options.timeFrom = options.timeFrom || 0;
-        options.newestFirst = options.newestFirst === undefined || options.newestFirst === null ? true : options.newestFirst;
+        options.newestFirst = options.newestFirst ?? true;
 
         const preSets: CoreSiteWSPreSets = {
             cacheKey: this.getCacheKeyForConversationMessages(options.userId, conversationId),

src/addons/mod/lesson/components/index/addon-mod-lesson-index.html

@@ -64,7 +64,7 @@
                         </ion-item>
                         <ion-button expand="block" type="submit">
                             {{ 'addon.mod_lesson.continue' | translate }}
-                            <core-icon slot="end" name="fas-chevron-right"></core-icon>
+                            <ion-icon slot="end" name="fas-chevron-right"></ion-icon>
                         </ion-button>
                         <!-- Remove this once Ionic fixes this bug: https://github.com/ionic-team/ionic-framework/issues/19368 -->
                         <input type="submit" class="core-submit-hidden-enter" />

src/addons/mod/lesson/components/index/index.ts

@@ -531,7 +531,7 @@ export class AddonModLessonIndexComponent extends CoreCourseModuleMainActivityCo
         }
 
         if (formattedData.lessonscored) {
-            if (formattedData.numofattempts) {
+            if (formattedData.numofattempts && formattedData.avescore != null) {
                 formattedData.avescore = CoreTextUtils.instance.roundToDecimals(formattedData.avescore, 2);
             }
             if (formattedData.highscore != null) {

src/addons/mod/lesson/components/menu-modal/menu-modal.html

@@ -4,7 +4,7 @@
 
         <ion-buttons slot="end">
             <ion-button (click)="closeModal()" [attr.aria-label]="'core.close' | translate">
-                <core-icon slot="icon-only" name="fas-times"></core-icon>
+                <ion-icon slot="icon-only" name="fas-times"></ion-icon>
             </ion-button>
         </ion-buttons>
     </ion-toolbar>

src/addons/mod/lesson/components/password-modal/password-modal.html

@@ -4,7 +4,7 @@
 
         <ion-buttons slot="end">
             <ion-button (click)="closeModal()" [attr.aria-label]="'core.close' | translate">
-                <core-icon slot="icon-only" name="fas-times"></core-icon>
+                <ion-icon slot="icon-only" name="fas-times"></ion-icon>
             </ion-button>
         </ion-buttons>
     </ion-toolbar>
@@ -20,7 +20,7 @@
         </ion-item>
         <ion-button expand="block" type="submit">
             {{ 'addon.mod_lesson.continue' | translate }}
-            <core-icon slot="end" name="fas-chevron-right"></core-icon>
+            <ion-icon slot="end" name="fas-chevron-right"></ion-icon>
         </ion-button>
         <!-- Remove this once Ionic fixes this bug: https://github.com/ionic-team/ionic-framework/issues/19368 -->
         <input type="submit" class="core-submit-hidden-enter" />

src/addons/mod/lesson/pages/player/player.html

@@ -99,7 +99,7 @@
                         <ng-container *ngSwitchCase="'multichoice'">
                             <!-- Single choice. -->
                             <ion-radio-group *ngIf="!question.multi" [formControlName]="question.controlName">
-                                <ion-item class="ion-text-wrap" *ngFor="let option of question.options" lines="none">
+                                <ion-item class="ion-text-wrap" *ngFor="let option of question.options">
                                     <ion-label>
                                         <core-format-text [component]="component" [componentId]="lesson.coursemodule"
                                             [text]="option.text" contextLevel="module" [contextInstanceId]="lesson?.coursemodule"
@@ -113,7 +113,7 @@
 
                             <!-- Multiple choice. -->
                             <ng-container *ngIf="question.multi">
-                                <ion-item class="ion-text-wrap" *ngFor="let option of question.options" lines="none">
+                                <ion-item class="ion-text-wrap" *ngFor="let option of question.options">
                                     <ion-label>
                                         <core-format-text [component]="component" [componentId]="lesson?.coursemodule"
                                             [text]="option.text" contextLevel="module" [contextInstanceId]="lesson?.coursemodule"

src/addons/mod/lesson/pages/player/player.ts

@@ -27,7 +27,7 @@ import { CoreUrlUtils } from '@services/utils/url';
 import { CoreUtils } from '@services/utils/utils';
 import { CoreWSExternalFile } from '@services/ws';
 import { ModalController, Translate } from '@singletons';
-import { CoreEvents } from '@singletons/events';
+import { CoreEventActivityDataSentData, CoreEvents } from '@singletons/events';
 import { AddonModLessonMenuModalPage } from '../../components/menu-modal/menu-modal';
 import {
     AddonModLesson,
@@ -409,7 +409,7 @@ export class AddonModLessonPlayerPage implements OnInit, OnDestroy, CanLeave {
         this.messages = this.messages.concat(data.messages);
         this.processData = undefined;
 
-        CoreEvents.trigger(CoreEvents.ACTIVITY_DATA_SENT, { module: 'lesson' });
+        CoreEvents.trigger<CoreEventActivityDataSentData>(CoreEvents.ACTIVITY_DATA_SENT, { module: 'lesson' });
 
         // Format activity link if present.
         if (this.eolData.activitylink) {

src/addons/mod/lesson/services/handlers/prefetch.ts

@@ -60,13 +60,13 @@ export class AddonModLessonPrefetchHandlerService extends CoreCourseActivityPref
 
         await modal.present();
 
-        const password = <string | undefined> await modal.onWillDismiss();
+        const result = await modal.onWillDismiss();
 
-        if (typeof password != 'string') {
+        if (typeof result.data != 'string') {
             throw new CoreCanceledError();
         }
 
-        return password;
+        return result.data;
     }
 
     /**

src/addons/mod/lesson/services/lesson-sync.ts

@@ -253,7 +253,7 @@ export class AddonModLessonSyncProvider extends CoreCourseActivitySyncBaseProvid
         }
 
         // Sync finished, set sync time.
-        await CoreUtils.instance.ignoreErrors(this.setSyncTime(String(lessonId), siteId));
+        await CoreUtils.instance.ignoreErrors(this.setSyncTime(lessonId, siteId));
 
         // All done, return the result.
         return result;

src/addons/mod/lesson/services/lesson.ts

@@ -2231,14 +2231,14 @@ export class AddonModLessonProvider {
      * @param data Data containing the user answer.
      * @return User response.
      */
-    protected getUserResponseMultichoice(data: Record<string, unknown>): number[] | null {
+    protected getUserResponseMultichoice(data: Record<string, unknown>): number[] | undefined {
         if (data.answer) {
             // The data is already stored as expected. If it's valid, parse the values to int.
             if (Array.isArray(data.answer)) {
                 return data.answer.map((value) => parseInt(value, 10));
             }
 
-            return null;
+            return undefined;
         }
 
         // Data is stored in properties like 'answer[379]'. Recreate the answer array.
@@ -3979,12 +3979,12 @@ export type AddonModLessonGetAttemptsOverviewWSResponse = {
 export type AddonModLessonAttemptsOverviewWSData = {
     lessonscored: boolean; // True if the lesson was scored.
     numofattempts: number; // Number of attempts.
-    avescore: number; // Average score.
+    avescore: number | null; // Average score.
-    highscore: number; // High score.
+    highscore: number | null; // High score.
-    lowscore: number; // Low score.
+    lowscore: number | null; // Low score.
-    avetime: number; // Average time (spent in taking the lesson).
+    avetime: number | null; // Average time (spent in taking the lesson).
-    hightime: number; // High time.
+    hightime: number | null; // High time.
-    lowtime: number; // Low time.
+    lowtime: number | null; // Low time.
     students?: AddonModLessonAttemptsOverviewsStudentWSData[]; // Students data, including attempts.
 };
 
@@ -4003,7 +4003,7 @@ export type AddonModLessonAttemptsOverviewsStudentWSData = {
  */
 export type AddonModLessonAttemptsOverviewsAttemptWSData = {
     try: number; // Attempt number.
-    grade: number; // Attempt grade.
+    grade: number | null; // Attempt grade.
     timestart: number; // Attempt time started.
     timeend: number; // Attempt last time continued.
     end: number; // Attempt time ended.

src/addons/mod/mod.module.ts

@@ -18,6 +18,7 @@ import { AddonModAssignModule } from './assign/assign.module';
 import { AddonModBookModule } from './book/book.module';
 import { AddonModLessonModule } from './lesson/lesson.module';
 import { AddonModPageModule } from './page/page.module';
+import { AddonModQuizModule } from './quiz/quiz.module';
 
 @NgModule({
     declarations: [],
@@ -26,6 +27,7 @@ import { AddonModPageModule } from './page/page.module';
         AddonModBookModule,
         AddonModLessonModule,
         AddonModPageModule,
+        AddonModQuizModule,
     ],
     providers: [],
     exports: [],

src/addons/mod/quiz/accessrules/accessrules.module.ts

@@ -0,0 +1,43 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { NgModule } from '@angular/core';
+
+import { AddonModQuizAccessDelayBetweenAttemptsModule } from './delaybetweenattempts/delaybetweenattempts.module';
+import { AddonModQuizAccessIpAddressModule } from './ipaddress/ipaddress.module';
+import { AddonModQuizAccessNumAttemptsModule } from './numattempts/numattempts.module';
+import { AddonModQuizAccessOfflineAttemptsModule } from './offlineattempts/offlineattempts.module';
+import { AddonModQuizAccessOpenCloseDateModule } from './openclosedate/openclosedate.module';
+import { AddonModQuizAccessPasswordModule } from './password/password.module';
+import { AddonModQuizAccessSafeBrowserModule } from './safebrowser/safebrowser.module';
+import { AddonModQuizAccessSecureWindowModule } from './securewindow/securewindow.module';
+import { AddonModQuizAccessTimeLimitModule } from './timelimit/timelimit.module';
+
+@NgModule({
+    declarations: [],
+    imports: [
+        AddonModQuizAccessDelayBetweenAttemptsModule,
+        AddonModQuizAccessIpAddressModule,
+        AddonModQuizAccessNumAttemptsModule,
+        AddonModQuizAccessOfflineAttemptsModule,
+        AddonModQuizAccessOpenCloseDateModule,
+        AddonModQuizAccessPasswordModule,
+        AddonModQuizAccessSafeBrowserModule,
+        AddonModQuizAccessSecureWindowModule,
+        AddonModQuizAccessTimeLimitModule,
+    ],
+    providers: [],
+    exports: [],
+})
+export class AddonModQuizAccessRulesModule { }

src/addons/mod/quiz/accessrules/delaybetweenattempts/delaybetweenattempts.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAccessDelayBetweenAttemptsHandler } from './services/handlers/delaybetweenattempts';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessDelayBetweenAttemptsHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonModQuizAccessDelayBetweenAttemptsModule {}

src/addons/mod/quiz/accessrules/delaybetweenattempts/services/handlers/delaybetweenattempts.ts

@@ -0,0 +1,54 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support delay between attempts access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessDelayBetweenAttemptsHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessDelayBetweenAttempts';
+    ruleName = 'quizaccess_delaybetweenattempts';
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    isPreflightCheckRequired(): boolean | Promise<boolean> {
+        return false;
+    }
+
+}
+
+export class AddonModQuizAccessDelayBetweenAttemptsHandler
+    extends makeSingleton(AddonModQuizAccessDelayBetweenAttemptsHandlerService) {}

src/addons/mod/quiz/accessrules/ipaddress/ipaddress.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAccessIpAddressHandler } from './services/handlers/ipaddress';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessIpAddressHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonModQuizAccessIpAddressModule {}

src/addons/mod/quiz/accessrules/ipaddress/services/handlers/ipaddress.ts

@@ -0,0 +1,53 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support IP address access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessIpAddressHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessIpAddress';
+    ruleName = 'quizaccess_ipaddress';
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    isPreflightCheckRequired(): boolean | Promise<boolean> {
+        return false;
+    }
+
+}
+
+export class AddonModQuizAccessIpAddressHandler extends makeSingleton(AddonModQuizAccessIpAddressHandlerService) {}

src/addons/mod/quiz/accessrules/numattempts/numattempts.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAccessNumAttemptsHandler } from './services/handlers/numattempts';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessNumAttemptsHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonModQuizAccessNumAttemptsModule {}

src/addons/mod/quiz/accessrules/numattempts/services/handlers/numattempts.ts

@@ -0,0 +1,53 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support num attempts access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessNumAttemptsHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessNumAttempts';
+    ruleName = 'quizaccess_numattempts';
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    isPreflightCheckRequired(): boolean | Promise<boolean> {
+        return false;
+    }
+
+}
+
+export class AddonModQuizAccessNumAttemptsHandler extends makeSingleton(AddonModQuizAccessNumAttemptsHandlerService) {}

src/addons/mod/quiz/accessrules/offlineattempts/component/addon-mod-quiz-access-offline-attempts.html

@@ -0,0 +1,6 @@
+<ion-item class="ion-text-wrap">
+    <ion-label>
+        <h3 class="item-heading">{{ 'core.settings.synchronization' | translate }}</h3>
+        <p>{{ 'addon.mod_quiz.confirmcontinueoffline' | translate:{$a: syncTimeReadable} }}</p>
+    </ion-label>
+</ion-item>

src/addons/mod/quiz/accessrules/offlineattempts/component/offlineattempts.ts

@@ -0,0 +1,56 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from '@addons/mod/quiz/services/quiz';
+import { AddonModQuizSync } from '@addons/mod/quiz/services/quiz-sync';
+import { Component, OnInit, Input } from '@angular/core';
+import { FormGroup, FormBuilder } from '@angular/forms';
+
+/**
+ * Component to render the preflight for offline attempts.
+ */
+@Component({
+    selector: 'addon-mod-quiz-access-offline-attempts',
+    templateUrl: 'addon-mod-quiz-access-offline-attempts.html',
+})
+export class AddonModQuizAccessOfflineAttemptsComponent implements OnInit {
+
+    @Input() rule?: string; // The name of the rule.
+    @Input() quiz?: AddonModQuizQuizWSData; // The quiz the rule belongs to.
+    @Input() attempt?: AddonModQuizAttemptWSData; // The attempt being started/continued.
+    @Input() prefetch?: boolean; // Whether the user is prefetching the quiz.
+    @Input() siteId?: string; // Site ID.
+    @Input() form?: FormGroup; // Form where to add the form control.
+
+    syncTimeReadable = '';
+
+    constructor(private fb: FormBuilder) { }
+
+    /**
+     * Component being initialized.
+     */
+    async ngOnInit(): Promise<void> {
+        // Always set confirmdatasaved to 1. Sending the data means the user accepted.
+        this.form?.addControl('confirmdatasaved', this.fb.control(1));
+
+        if (!this.quiz) {
+            return;
+        }
+
+        const time = await AddonModQuizSync.instance.getSyncTime(this.quiz.id);
+
+        this.syncTimeReadable = AddonModQuizSync.instance.getReadableTimeFromTimestamp(time);
+    }
+
+}

src/addons/mod/quiz/accessrules/offlineattempts/offlineattempts.module.ts

@@ -0,0 +1,43 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { AddonModQuizAccessOfflineAttemptsComponent } from './component/offlineattempts';
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAccessOfflineAttemptsHandler } from './services/handlers/offlineattempts';
+
+@NgModule({
+    declarations: [
+        AddonModQuizAccessOfflineAttemptsComponent,
+    ],
+    imports: [
+        CoreSharedModule,
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessOfflineAttemptsHandler.instance);
+            },
+        },
+    ],
+    exports: [
+        AddonModQuizAccessOfflineAttemptsComponent,
+    ],
+})
+export class AddonModQuizAccessOfflineAttemptsModule {}

src/addons/mod/quiz/accessrules/offlineattempts/services/handlers/offlineattempts.ts

@@ -0,0 +1,102 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable, Type } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from '@addons/mod/quiz/services/quiz';
+import { AddonModQuizAccessOfflineAttemptsComponent } from '../../component/offlineattempts';
+import { AddonModQuizSync } from '@addons/mod/quiz/services/quiz-sync';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support offline attempts access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessOfflineAttemptsHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessOfflineAttempts';
+    ruleName = 'quizaccess_offlineattempts';
+
+    /**
+     * Add preflight data that doesn't require user interaction. The data should be added to the preflightData param.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param preflightData Object where to add the preflight data.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done if async, void if it's synchronous.
+     */
+    getFixedPreflightData(
+        quiz: AddonModQuizQuizWSData,
+        preflightData: Record<string, string>,
+    ): void | Promise<void> {
+        preflightData.confirmdatasaved = '1';
+    }
+
+    /**
+     * Return the Component to use to display the access rule preflight.
+     * Implement this if your access rule requires a preflight check with user interaction.
+     * It's recommended to return the class of the component, but you can also return an instance of the component.
+     *
+     * @return The component (or promise resolved with component) to use, undefined if not found.
+     */
+    getPreflightComponent(): Type<unknown> | Promise<Type<unknown>> {
+        return AddonModQuizAccessOfflineAttemptsComponent;
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    async isPreflightCheckRequired(
+        quiz: AddonModQuizQuizWSData,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        siteId?: string, // eslint-disable-line @typescript-eslint/no-unused-vars
+    ): Promise<boolean> {
+        if (prefetch) {
+            // Don't show the warning if the user is prefetching.
+            return false;
+        }
+
+        if (!attempt) {
+            // User is starting a new attempt, show the warning.
+            return true;
+        }
+
+        const syncTime = await AddonModQuizSync.instance.getSyncTime(quiz.id);
+
+        // Show warning if last sync was a while ago.
+        return Date.now() - AddonModQuizSync.instance.syncInterval > syncTime;
+    }
+
+}
+
+export class AddonModQuizAccessOfflineAttemptsHandler extends makeSingleton(AddonModQuizAccessOfflineAttemptsHandlerService) {}

src/addons/mod/quiz/accessrules/openclosedate/openclosedate.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAccessOpenCloseDateHandler } from './services/handlers/openclosedate';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessOpenCloseDateHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonModQuizAccessOpenCloseDateModule {}

src/addons/mod/quiz/accessrules/openclosedate/services/handlers/openclosedate.ts

@@ -0,0 +1,76 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { AddonModQuizAttemptWSData, AddonModQuizProvider } from '@addons/mod/quiz/services/quiz';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support open/close date access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessOpenCloseDateHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessOpenCloseDate';
+    ruleName = 'quizaccess_openclosedate';
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    isPreflightCheckRequired(): boolean | Promise<boolean> {
+        return false;
+    }
+
+    /**
+     * Whether or not the time left of an attempt should be displayed.
+     *
+     * @param attempt The attempt.
+     * @param endTime The attempt end time (in seconds).
+     * @param timeNow The current time in seconds.
+     * @return Whether it should be displayed.
+     */
+    shouldShowTimeLeft(attempt: AddonModQuizAttemptWSData, endTime: number, timeNow: number): boolean {
+        // If this is a teacher preview after the close date, do not show the time.
+        if (attempt.preview && timeNow > endTime) {
+            return false;
+        }
+
+        // Show the time left only if it's less than QUIZ_SHOW_TIME_BEFORE_DEADLINE.
+        if (timeNow > endTime - AddonModQuizProvider.QUIZ_SHOW_TIME_BEFORE_DEADLINE) {
+            return true;
+        }
+
+        return false;
+    }
+
+}
+
+export class AddonModQuizAccessOpenCloseDateHandler extends makeSingleton(AddonModQuizAccessOpenCloseDateHandlerService) {}

src/addons/mod/quiz/accessrules/password/component/addon-mod-quiz-access-password.html

@@ -0,0 +1,14 @@
+<ion-item class="ion-text-wrap">
+    <ion-label>
+        <h3 class="item-heading">{{ 'addon.mod_quiz.quizpassword' | translate }}</h3>
+        <p>{{ 'addon.mod_quiz.requirepasswordmessage' | translate}}</p>
+    </ion-label>
+</ion-item>
+<ion-item [formGroup]="form">
+    <ion-label></ion-label>
+    <core-show-password [name]="'quizpassword'">
+        <ion-input id="addon-mod_quiz-accessrule-password-input" name="quizpassword" type="password"
+            placeholder="{{ 'addon.mod_quiz.quizpassword' | translate }}" [formControlName]="'quizpassword'" [clearOnEdit]="false">
+        </ion-input>
+    </core-show-password>
+</ion-item>

src/addons/mod/quiz/accessrules/password/component/password.ts

@@ -0,0 +1,46 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, OnInit, Input } from '@angular/core';
+import { FormGroup, FormBuilder } from '@angular/forms';
+
+import { AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from '@addons/mod/quiz/services/quiz';
+
+/**
+ * Component to render the preflight for password.
+ */
+@Component({
+    selector: 'addon-mod-quiz-access-password',
+    templateUrl: 'addon-mod-quiz-access-password.html',
+})
+export class AddonModQuizAccessPasswordComponent implements OnInit {
+
+    @Input() rule?: string; // The name of the rule.
+    @Input() quiz?: AddonModQuizQuizWSData; // The quiz the rule belongs to.
+    @Input() attempt?: AddonModQuizAttemptWSData; // The attempt being started/continued.
+    @Input() prefetch?: boolean; // Whether the user is prefetching the quiz.
+    @Input() siteId?: string; // Site ID.
+    @Input() form?: FormGroup; // Form where to add the form control.
+
+    constructor(private fb: FormBuilder) { }
+
+    /**
+     * Component being initialized.
+     */
+    ngOnInit(): void {
+        // Add the control for the password.
+        this.form?.addControl('quizpassword', this.fb.control(''));
+    }
+
+}

src/addons/mod/quiz/accessrules/password/password.module.ts

@@ -0,0 +1,51 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { CORE_SITE_SCHEMAS } from '@services/sites';
+import { AddonModQuizAccessPasswordComponent } from './component/password';
+import { AddonModQuizAccessPasswordHandler } from './services/handlers/password';
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { SITE_SCHEMA } from './services/database/password';
+
+@NgModule({
+    declarations: [
+        AddonModQuizAccessPasswordComponent,
+    ],
+    imports: [
+        CoreSharedModule,
+    ],
+    providers: [
+        {
+            provide: CORE_SITE_SCHEMAS,
+            useValue: [SITE_SCHEMA],
+            multi: true,
+        },
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessPasswordHandler.instance);
+            },
+        },
+    ],
+    exports: [
+        AddonModQuizAccessPasswordComponent,
+    ],
+})
+export class AddonModQuizAccessPasswordModule {}

src/addons/mod/quiz/accessrules/password/services/database/password.ts

@@ -0,0 +1,53 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { CoreSiteSchema } from '@services/sites';
+
+/**
+ * Database variables for AddonModQuizAccessPasswordHandlerService.
+ */
+export const PASSWORD_TABLE_NAME = 'addon_mod_quiz_access_password';
+export const SITE_SCHEMA: CoreSiteSchema = {
+    name: 'AddonModQuizAccessPasswordHandler',
+    version: 1,
+    tables: [
+        {
+            name: PASSWORD_TABLE_NAME,
+            columns: [
+                {
+                    name: 'id',
+                    type: 'INTEGER',
+                    primaryKey: true,
+                },
+                {
+                    name: 'password',
+                    type: 'TEXT',
+                },
+                {
+                    name: 'timemodified',
+                    type: 'INTEGER',
+                },
+            ],
+        },
+    ],
+};
+
+/**
+ * Quiz attempt.
+ */
+export type AddonModQuizAccessPasswordDBRecord = {
+    id: number;
+    password: string;
+    timemodified: number;
+};

src/addons/mod/quiz/accessrules/password/services/handlers/password.ts

@@ -0,0 +1,198 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable, Type } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { makeSingleton } from '@singletons';
+import { AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from '@addons/mod/quiz/services/quiz';
+import { CoreSites } from '@services/sites';
+import { AddonModQuizAccessPasswordDBRecord, PASSWORD_TABLE_NAME } from '../database/password';
+import { AddonModQuizAccessPasswordComponent } from '../../component/password';
+import { CoreUtils } from '@services/utils/utils';
+
+/**
+ * Handler to support password access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessPasswordHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessPassword';
+    ruleName = 'quizaccess_password';
+
+    /**
+     * Add preflight data that doesn't require user interaction. The data should be added to the preflightData param.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param preflightData Object where to add the preflight data.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done if async, void if it's synchronous.
+     */
+    async getFixedPreflightData(
+        quiz: AddonModQuizQuizWSData,
+        preflightData: Record<string, string>,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<void> {
+        if (typeof preflightData.quizpassword != 'undefined') {
+            return;
+        }
+
+        try {
+            // Try to get a password stored. If it's found, use it.
+            const entry = await this.getPasswordEntry(quiz.id, siteId);
+
+            preflightData.quizpassword = entry.password;
+        } catch {
+            // No password stored.
+        }
+    }
+
+    /**
+     * Get a password stored in DB.
+     *
+     * @param quizId Quiz ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with the DB entry on success.
+     */
+    protected async getPasswordEntry(quizId: number, siteId?: string): Promise<AddonModQuizAccessPasswordDBRecord> {
+        const site = await CoreSites.instance.getSite(siteId);
+
+        return site.getDb().getRecord(PASSWORD_TABLE_NAME, { id: quizId });
+    }
+
+    /**
+     * Return the Component to use to display the access rule preflight.
+     * Implement this if your access rule requires a preflight check with user interaction.
+     * It's recommended to return the class of the component, but you can also return an instance of the component.
+     *
+     * @return The component (or promise resolved with component) to use, undefined if not found.
+     */
+    getPreflightComponent(): Type<unknown> | Promise<Type<unknown>> {
+        return AddonModQuizAccessPasswordComponent;
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    async isPreflightCheckRequired(
+        quiz: AddonModQuizQuizWSData,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<boolean> {
+        // If there's a password stored don't require the preflight since we'll use the stored one.
+        const entry = await CoreUtils.instance.ignoreErrors(this.getPasswordEntry(quiz.id, siteId));
+
+        return !entry;
+    }
+
+    /**
+     * Function called when the preflight check has passed. This is a chance to record that fact in some way.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued.
+     * @param preflightData Preflight data gathered.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done if async, void if it's synchronous.
+     */
+    async notifyPreflightCheckPassed(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData | undefined,
+        preflightData: Record<string, string>,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<void> {
+        // The password is right, store it to use it automatically in following executions.
+        if (typeof preflightData.quizpassword != 'undefined') {
+            return this.storePassword(quiz.id, preflightData.quizpassword, siteId);
+        }
+    }
+
+    /**
+     * Function called when the preflight check fails. This is a chance to record that fact in some way.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued.
+     * @param preflightData Preflight data gathered.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done if async, void if it's synchronous.
+     */
+    notifyPreflightCheckFailed?(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData | undefined,
+        preflightData: Record<string, string>,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<void> {
+        // The password is wrong, remove it from DB if it's there.
+        return this.removePassword(quiz.id, siteId);
+    }
+
+    /**
+     * Remove a password from DB.
+     *
+     * @param quizId Quiz ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    protected async removePassword(quizId: number, siteId?: string): Promise<void> {
+        const site = await CoreSites.instance.getSite(siteId);
+
+        await site.getDb().deleteRecords(PASSWORD_TABLE_NAME, { id: quizId });
+    }
+
+    /**
+     * Store a password in DB.
+     *
+     * @param quizId Quiz ID.
+     * @param password Password.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    protected async storePassword(quizId: number, password: string, siteId?: string): Promise<void> {
+        const site = await CoreSites.instance.getSite(siteId);
+
+        const entry: AddonModQuizAccessPasswordDBRecord = {
+            id: quizId,
+            password,
+            timemodified: Date.now(),
+        };
+
+        await site.getDb().insertRecord(PASSWORD_TABLE_NAME, entry);
+    }
+
+}
+
+export class AddonModQuizAccessPasswordHandler extends makeSingleton(AddonModQuizAccessPasswordHandlerService) {}

src/addons/mod/quiz/accessrules/safebrowser/safebrowser.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAccessSafeBrowserHandler } from './services/handlers/safebrowser';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessSafeBrowserHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonModQuizAccessSafeBrowserModule {}

src/addons/mod/quiz/accessrules/safebrowser/services/handlers/safebrowser.ts

@@ -0,0 +1,53 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support safe address access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessSafeBrowserHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessSafeBrowser';
+    ruleName = 'quizaccess_safebrowser';
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    isPreflightCheckRequired(): boolean | Promise<boolean> {
+        return false;
+    }
+
+}
+
+export class AddonModQuizAccessSafeBrowserHandler extends makeSingleton(AddonModQuizAccessSafeBrowserHandlerService) {}

src/addons/mod/quiz/accessrules/securewindow/securewindow.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAccessSecureWindowHandler } from './services/handlers/securewindow';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessSecureWindowHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonModQuizAccessSecureWindowModule {}

src/addons/mod/quiz/accessrules/securewindow/services/handlers/securewindow.ts

@@ -0,0 +1,53 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support secure window access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessSecureWindowHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessSecureWindow';
+    ruleName = 'quizaccess_securewindow';
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    isPreflightCheckRequired(): boolean | Promise<boolean> {
+        return false;
+    }
+
+}
+
+export class AddonModQuizAccessSecureWindowHandler extends makeSingleton(AddonModQuizAccessSecureWindowHandlerService) {}

src/addons/mod/quiz/accessrules/timelimit/component/addon-mod-quiz-access-time-limit.html

@@ -0,0 +1,6 @@
+<ion-item class="ion-text-wrap">
+    <ion-label>
+        <h3 class="item-heading">{{ 'addon.mod_quiz.confirmstartheader' | translate }}</h3>
+        <p>{{ 'addon.mod_quiz.confirmstart' | translate:{$a: readableTimeLimit} }}</p>
+    </ion-label>
+</ion-item>

src/addons/mod/quiz/accessrules/timelimit/component/timelimit.ts

@@ -0,0 +1,47 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, Input, OnInit } from '@angular/core';
+import { FormGroup } from '@angular/forms';
+
+import { AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from '@addons/mod/quiz/services/quiz';
+import { CoreTimeUtils } from '@services/utils/time';
+
+/**
+ * Component to render the preflight for time limit.
+ */
+@Component({
+    selector: 'addon-mod-quiz-access-time-limit',
+    templateUrl: 'addon-mod-quiz-access-time-limit.html',
+})
+export class AddonModQuizAccessTimeLimitComponent implements OnInit {
+
+    @Input() rule?: string; // The name of the rule.
+    @Input() quiz?: AddonModQuizQuizWSData; // The quiz the rule belongs to.
+    @Input() attempt?: AddonModQuizAttemptWSData; // The attempt being started/continued.
+    @Input() prefetch?: boolean; // Whether the user is prefetching the quiz.
+    @Input() siteId?: string; // Site ID.
+    @Input() form?: FormGroup; // Form where to add the form control.
+
+    readableTimeLimit = '';
+
+    ngOnInit(): void {
+        if (!this.quiz?.timelimit) {
+            return;
+        }
+
+        this.readableTimeLimit = CoreTimeUtils.instance.formatTime(this.quiz?.timelimit);
+    }
+
+}

src/addons/mod/quiz/accessrules/timelimit/services/handlers/timelimit.ts

@@ -0,0 +1,83 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable, Type } from '@angular/core';
+
+import { AddonModQuizAccessRuleHandler } from '@addons/mod/quiz/services/access-rules-delegate';
+import { AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from '@addons/mod/quiz/services/quiz';
+import { AddonModQuizAccessTimeLimitComponent } from '../../component/timelimit';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support time limit access rule.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessTimeLimitHandlerService implements AddonModQuizAccessRuleHandler {
+
+    name = 'AddonModQuizAccessTimeLimit';
+    ruleName = 'quizaccess_timelimit';
+
+    /**
+     * Return the Component to use to display the access rule preflight.
+     * Implement this if your access rule requires a preflight check with user interaction.
+     * It's recommended to return the class of the component, but you can also return an instance of the component.
+     *
+     * @return The component (or promise resolved with component) to use, undefined if not found.
+     */
+    getPreflightComponent(): Type<unknown> | Promise<Type<unknown>> {
+        return AddonModQuizAccessTimeLimitComponent;
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    isPreflightCheckRequired(
+        quiz: AddonModQuizQuizWSData,
+        attempt?: AddonModQuizAttemptWSData,
+    ): boolean | Promise<boolean> {
+        // Warning only required if the attempt is not already started.
+        return !attempt;
+    }
+
+    /**
+     * Whether or not the time left of an attempt should be displayed.
+     *
+     * @param attempt The attempt.
+     * @param endTime The attempt end time (in seconds).
+     * @param timeNow The current time in seconds.
+     * @return Whether it should be displayed.
+     */
+    shouldShowTimeLeft(attempt: AddonModQuizAttemptWSData, endTime: number, timeNow: number): boolean {
+        // If this is a teacher preview after the time limit expires, don't show the time left.
+        return !(attempt.preview && timeNow > endTime);
+    }
+
+}
+
+export class AddonModQuizAccessTimeLimitHandler extends makeSingleton(AddonModQuizAccessTimeLimitHandlerService) {}

src/addons/mod/quiz/accessrules/timelimit/timelimit.module.ts

@@ -0,0 +1,43 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { AddonModQuizAccessTimeLimitComponent } from './component/timelimit';
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAccessTimeLimitHandler } from './services/handlers/timelimit';
+
+@NgModule({
+    declarations: [
+        AddonModQuizAccessTimeLimitComponent,
+    ],
+    imports: [
+        CoreSharedModule,
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                AddonModQuizAccessRuleDelegate.instance.registerHandler(AddonModQuizAccessTimeLimitHandler.instance);
+            },
+        },
+    ],
+    exports: [
+        AddonModQuizAccessTimeLimitComponent,
+    ],
+})
+export class AddonModQuizAccessTimeLimitModule {}

src/addons/mod/quiz/classes/auto-save.ts

@@ -0,0 +1,254 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { BehaviorSubject } from 'rxjs';
+
+import { CoreQuestionHelper } from '@features/question/services/question-helper';
+import { CoreQuestionsAnswers } from '@features/question/services/question';
+import { PopoverController } from '@singletons';
+import { CoreLogger } from '@singletons/logger';
+import { AddonModQuizConnectionErrorComponent } from '../components/connection-error/connection-error';
+import { AddonModQuiz, AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from '../services/quiz';
+
+/**
+ * Class to support auto-save in quiz. Every certain seconds, it will check if there are changes in the current page answers
+ * and, if so, it will save them automatically.
+ */
+export class AddonModQuizAutoSave {
+
+    protected readonly CHECK_CHANGES_INTERVAL = 5000;
+
+    protected logger: CoreLogger;
+    protected checkChangesInterval?: number; // Interval to check if there are changes in the answers.
+    protected loadPreviousAnswersTimeout?: number; // Timeout to load previous answers.
+    protected autoSaveTimeout?: number; // Timeout to auto-save the answers.
+    protected popover?: HTMLIonPopoverElement; // Popover to display there's been an error.
+    protected popoverShown = false; // Whether the popover is shown.
+    protected previousAnswers?: CoreQuestionsAnswers; // The previous answers, to check if answers have changed.
+    protected errorObservable: BehaviorSubject<boolean>; // An observable to notify if there's been an error.
+
+    /**
+     * Constructor.
+     *
+     * @param formName Name of the form where the answers are stored.
+     * @param buttonSelector Selector to find the button to show the connection error.
+     */
+    constructor(
+        protected formName: string,
+        protected buttonSelector: string,
+    ) {
+        this.logger = CoreLogger.getInstance('AddonModQuizAutoSave');
+
+        // Create the observable to notify if an error happened.
+        this.errorObservable = new BehaviorSubject<boolean>(false);
+    }
+
+    /**
+     * Cancel a pending auto save.
+     */
+    cancelAutoSave(): void {
+        clearTimeout(this.autoSaveTimeout);
+        this.autoSaveTimeout = undefined;
+    }
+
+    /**
+     * Check if the answers have changed in a page.
+     *
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param preflightData Preflight data.
+     * @param offline Whether the quiz is being attempted in offline mode.
+     */
+    checkChanges(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData,
+        preflightData: Record<string, string>,
+        offline?: boolean,
+    ): void {
+        if (this.autoSaveTimeout) {
+            // We already have an auto save pending, no need to check changes.
+            return;
+        }
+
+        const answers = this.getAnswers();
+
+        if (!this.previousAnswers) {
+            // Previous answers isn't set, set it now.
+            this.previousAnswers = answers;
+
+            return;
+        }
+
+        // Check if answers have changed.
+        let equal = true;
+
+        for (const name in answers) {
+            if (this.previousAnswers[name] != answers[name]) {
+                equal = false;
+                break;
+            }
+        }
+
+        if (!equal) {
+            this.setAutoSaveTimer(quiz, attempt, preflightData, offline);
+        }
+
+        this.previousAnswers = answers;
+    }
+
+    /**
+     * Get answers from a form.
+     *
+     * @return Answers.
+     */
+    protected getAnswers(): CoreQuestionsAnswers {
+        return CoreQuestionHelper.instance.getAnswersFromForm(document.forms[this.formName]);
+    }
+
+    /**
+     * Hide the auto save error.
+     */
+    hideAutoSaveError(): void {
+        this.errorObservable.next(false);
+        this.popover?.dismiss();
+    }
+
+    /**
+     * Returns an observable that will notify when an error happens or stops.
+     * It will send true when there's an error, and false when the error has been ammended.
+     *
+     * @return Observable.
+     */
+    onError(): BehaviorSubject<boolean> {
+        return this.errorObservable;
+    }
+
+    /**
+     * Schedule an auto save process if it's not scheduled already.
+     *
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param preflightData Preflight data.
+     * @param offline Whether the quiz is being attempted in offline mode.
+     */
+    setAutoSaveTimer(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData,
+        preflightData: Record<string, string>,
+        offline?: boolean,
+    ): void {
+        // Don't schedule if already shceduled or quiz is almost closed.
+        if (!quiz.autosaveperiod || this.autoSaveTimeout || AddonModQuiz.instance.isAttemptTimeNearlyOver(quiz, attempt)) {
+            return;
+        }
+
+        // Schedule save.
+        this.autoSaveTimeout = window.setTimeout(async () => {
+            const answers = this.getAnswers();
+            this.cancelAutoSave();
+            this.previousAnswers = answers; // Update previous answers to match what we're sending to the server.
+
+            try {
+                await AddonModQuiz.instance.saveAttempt(quiz, attempt, answers, preflightData, offline);
+
+                // Save successful, we can hide the connection error if it was shown.
+                this.hideAutoSaveError();
+            } catch (error) {
+                // Error auto-saving. Show error and set timer again.
+                this.logger.warn('Error auto-saving data.', error);
+
+                // If there was no error already, show the error message.
+                if (!this.errorObservable.getValue()) {
+                    this.errorObservable.next(true);
+                    this.showAutoSaveError();
+                }
+
+                // Try again.
+                this.setAutoSaveTimer(quiz, attempt, preflightData, offline);
+            }
+        }, quiz.autosaveperiod * 1000);
+    }
+
+    /**
+     * Show an error popover due to an auto save error.
+     */
+    async showAutoSaveError(ev?: Event): Promise<void> {
+        // Don't show popover if it was already shown.
+        if (this.popoverShown) {
+            return;
+        }
+
+        const event: unknown = ev || {
+            // Cannot use new Event() because event's target property is readonly
+            target: document.querySelector(this.buttonSelector),
+            stopPropagation: () => {}, // eslint-disable-line @typescript-eslint/no-empty-function
+            preventDefault: () => {}, // eslint-disable-line @typescript-eslint/no-empty-function
+        };
+        this.popoverShown = true;
+
+        this.popover = await PopoverController.instance.create({
+            component: AddonModQuizConnectionErrorComponent,
+            event: <Event> event,
+        });
+        await this.popover.present();
+
+        await this.popover.onDidDismiss();
+
+        this.popoverShown = false;
+    }
+
+    /**
+     * Start a process to periodically check changes in answers.
+     *
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param preflightData Preflight data.
+     * @param offline Whether the quiz is being attempted in offline mode.
+     */
+    startCheckChangesProcess(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData,
+        preflightData: Record<string, string>,
+        offline?: boolean,
+    ): void {
+        if (this.checkChangesInterval || !quiz.autosaveperiod) {
+            // We already have the interval in place or the quiz has autosave disabled.
+            return;
+        }
+
+        this.previousAnswers = undefined;
+
+        // Load initial answers in 2.5 seconds so the first check interval finds them already loaded.
+        this.loadPreviousAnswersTimeout = window.setTimeout(() => {
+            this.checkChanges(quiz, attempt, preflightData, offline);
+        }, 2500);
+
+        // Check changes every certain time.
+        this.checkChangesInterval = window.setInterval(() => {
+            this.checkChanges(quiz, attempt, preflightData, offline);
+        }, this.CHECK_CHANGES_INTERVAL);
+    }
+
+    /**
+     * Stops the periodical check for changes.
+     */
+    stopCheckChangesProcess(): void {
+        clearTimeout(this.loadPreviousAnswersTimeout);
+        clearInterval(this.checkChangesInterval);
+
+        this.loadPreviousAnswersTimeout = undefined;
+        this.checkChangesInterval = undefined;
+    }
+
+}

src/addons/mod/quiz/components/components.module.ts

@@ -0,0 +1,44 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { NgModule } from '@angular/core';
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { CoreCourseComponentsModule } from '@features/course/components/components.module';
+import { AddonModQuizConnectionErrorComponent } from './connection-error/connection-error';
+import { AddonModQuizIndexComponent } from './index/index';
+import { AddonModQuizNavigationModalComponent } from './navigation-modal/navigation-modal';
+import { AddonModQuizPreflightModalComponent } from './preflight-modal/preflight-modal';
+
+@NgModule({
+    declarations: [
+        AddonModQuizIndexComponent,
+        AddonModQuizConnectionErrorComponent,
+        AddonModQuizNavigationModalComponent,
+        AddonModQuizPreflightModalComponent,
+    ],
+    imports: [
+        CoreSharedModule,
+        CoreCourseComponentsModule,
+    ],
+    providers: [
+    ],
+    exports: [
+        AddonModQuizIndexComponent,
+        AddonModQuizConnectionErrorComponent,
+        AddonModQuizNavigationModalComponent,
+        AddonModQuizPreflightModalComponent,
+    ],
+})
+export class AddonModQuizComponentsModule {}

src/addons/mod/quiz/components/connection-error/connection-error.html

@@ -0,0 +1,3 @@
+<ion-item class="ion-text-wrap">
+    <ion-label>{{ "addon.mod_quiz.connectionerror" | translate }}</ion-label>
+</ion-item>

src/addons/mod/quiz/components/connection-error/connection-error.scss

@@ -0,0 +1,7 @@
+:host {
+    background-color: var(--red-light);
+
+    .item {
+        --background: var(--red-light);
+    }
+}

src/addons/mod/quiz/components/connection-error/connection-error.ts

@@ -0,0 +1,27 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component } from '@angular/core';
+
+/**
+ * Component that displays a quiz entry page.
+ */
+@Component({
+    selector: 'addon-mod-quiz-connection-error',
+    templateUrl: 'connection-error.html',
+    styleUrls: ['connection-error.scss'],
+})
+export class AddonModQuizConnectionErrorComponent {
+
+}

src/addons/mod/quiz/components/index/addon-mod-quiz-index.html

@@ -0,0 +1,199 @@
+<!-- Buttons to add to the header. -->
+<core-navbar-buttons slot="end">
+    <core-context-menu>
+        <core-context-menu-item *ngIf="externalUrl" [priority]="900" [content]="'core.openinbrowser' | translate"
+            [href]="externalUrl" iconAction="fas-external-link-alt">
+        </core-context-menu-item>
+        <core-context-menu-item *ngIf="description" [priority]="800" [content]="'core.moduleintro' | translate"
+            (action)="expandDescription()" iconAction="fas-arrow-right">
+        </core-context-menu-item>
+        <core-context-menu-item *ngIf="blog" [priority]="750" content="{{'addon.blog.blog' | translate}}"
+            [iconAction]="'far-newspaper'" (action)="gotoBlog()">
+        </core-context-menu-item>
+        <core-context-menu-item *ngIf="loaded && !hasOffline && isOnline" [priority]="700" [content]="'core.refresh' | translate"
+            (action)="doRefresh(null, $event)" [iconAction]="refreshIcon" [closeOnClick]="false">
+        </core-context-menu-item>
+        <core-context-menu-item *ngIf="loaded && hasOffline && isOnline"  [priority]="600" (action)="doRefresh(null, $event, true)"
+            [content]="'core.settings.synchronizenow' | translate" [iconAction]="syncIcon" [closeOnClick]="false">
+        </core-context-menu-item>
+        <core-context-menu-item *ngIf="prefetchStatusIcon" [priority]="500" [content]="prefetchText" (action)="prefetch($event)"
+            [iconAction]="prefetchStatusIcon" [closeOnClick]="false">
+        </core-context-menu-item>
+        <core-context-menu-item *ngIf="size" [priority]="400" [content]="'core.clearstoreddata' | translate:{$a: size}"
+            iconDescription="fas-archive" (action)="removeFiles($event)" iconAction="fas-trash" [closeOnClick]="false">
+        </core-context-menu-item>
+    </core-context-menu>
+</core-navbar-buttons>
+
+<!-- Content. -->
+<core-loading [hideUntil]="loaded" class="core-loading-center">
+    <core-course-module-description [description]="description" [component]="component" [componentId]="componentId"
+        contextLevel="module" [contextInstanceId]="module?.id" [courseId]="courseId">
+    </core-course-module-description>
+
+    <!-- Access rules description messages. -->
+    <ion-card *ngIf="gradeMethodReadable || accessRules.length || syncTime">
+        <ion-list>
+            <ion-item class="ion-text-wrap" *ngFor="let rule of accessRules">
+                <ion-label><p>{{ rule }}</p></ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap" *ngIf="gradeMethodReadable">
+                <ion-label>
+                    <h3>{{ 'addon.mod_quiz.grademethod' | translate }}</h3>
+                    <p>{{ gradeMethodReadable }}</p>
+                </ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap" *ngIf="syncTime">
+                <ion-label>
+                    <h3>{{ 'core.lastsync' | translate }}</h3>
+                    <p>{{ syncTime }}</p>
+                </ion-label>
+            </ion-item>
+        </ion-list>
+    </ion-card>
+
+    <!-- List of user attempts. -->
+    <ion-card class="addon-mod_quiz-table" *ngIf="quiz && attempts.length">
+        <ion-card-header class="ion-text-wrap">
+            <ion-card-header>
+                <ion-card-title>{{ 'addon.mod_quiz.summaryofattempts' | translate }}</ion-card-title>
+            </ion-card-header>
+        </ion-card-header>
+        <ion-card-content>
+            <!-- "Header" of the table -->
+            <ion-item class="ion-text-wrap addon-mod_quiz-table-header" detail="true">
+                <ion-label>
+                    <ion-row class="ion-align-items-center">
+                        <ion-col class="ion-text-center ion-hide-md-down" *ngIf="quiz.showAttemptColumn">
+                            <strong>{{ 'addon.mod_quiz.attemptnumber' | translate }}</strong>
+                        </ion-col>
+                        <ion-col class="ion-text-center ion-hide-md-up" *ngIf="quiz.showAttemptColumn"><strong>#</strong></ion-col>
+                        <ion-col size="7"><strong>{{ 'addon.mod_quiz.attemptstate' | translate }}</strong></ion-col>
+                        <ion-col class="ion-text-center ion-hide-md-down" *ngIf="quiz.showMarkColumn">
+                            <strong>{{ 'addon.mod_quiz.marks' | translate }} / {{ quiz.sumGradesFormatted }}</strong>
+                        </ion-col>
+                        <ion-col class="ion-text-center" *ngIf="quiz.showGradeColumn">
+                            <strong>{{ 'addon.mod_quiz.grade' | translate }} / {{ quiz.gradeFormatted }}</strong>
+                        </ion-col>
+                    </ion-row>
+                </ion-label>
+            </ion-item>
+            <!-- List of attempts. -->
+            <ion-item class="ion-text-wrap" *ngFor="let attempt of attempts" button detail="true"
+                [ngClass]='{"addon-mod_quiz-highlighted": attempt.highlightGrade}'
+                [attr.aria-label]="'core.seemoredetail' | translate" (click)="viewAttempt(attempt.id)">
+                <ion-label>
+                    <ion-row class="ion-align-items-center">
+                        <ion-col class="ion-text-center" *ngIf="quiz.showAttemptColumn && attempt.preview">
+                            {{ 'addon.mod_quiz.preview' | translate }}
+                        </ion-col>
+                        <ion-col class="ion-text-center" *ngIf="quiz.showAttemptColumn && !attempt.preview">
+                            {{ attempt.attempt }}
+                        </ion-col>
+                        <ion-col size="7">
+                            <p *ngFor="let sentence of attempt.readableState">{{ sentence }}</p>
+                        </ion-col>
+                        <ion-col class="ion-text-center ion-hide-md-down" *ngIf="quiz.showMarkColumn">
+                            <p>{{ attempt.readableMark }}</p>
+                        </ion-col>
+                        <ion-col class="ion-text-center" *ngIf="quiz.showGradeColumn"><p>{{ attempt.readableGrade }}</p></ion-col>
+                    </ion-row>
+                </ion-label>
+            </ion-item>
+        </ion-card-content>
+    </ion-card>
+
+    <!-- Result info. -->
+    <ion-card *ngIf="quiz && showResults &&
+        (gradeResult || gradeOverridden || gradebookFeedback || (quiz.showFeedbackColumn && overallFeedback))">
+        <ion-list>
+            <ion-item class="ion-text-wrap" *ngIf="gradeResult">
+                <ion-label>{{ gradeResult }}</ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap" *ngIf="gradeOverridden">
+                <ion-label>{{ 'core.course.overriddennotice' | translate }}</ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap" *ngIf="gradebookFeedback">
+                <ion-label>
+                    <h3 class="item-heading">{{ 'addon.mod_quiz.comment' | translate }}</h3>
+                    <p><core-format-text [component]="component" [componentId]="componentId" [text]="gradebookFeedback"
+                        contextLevel="module" [contextInstanceId]="module?.id" [courseId]="courseId">
+                    </core-format-text></p>
+                </ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap" *ngIf="quiz.showFeedbackColumn && overallFeedback">
+                <ion-label>
+                    <h3 class="item-heading">{{ 'addon.mod_quiz.overallfeedback' | translate }}</h3>
+                    <p><core-format-text [component]="component" [componentId]="componentId" [text]="overallFeedback"
+                        contextLevel="module" [contextInstanceId]="module?.id" [courseId]="courseId">
+                    </core-format-text></p>
+                </ion-label>
+            </ion-item>
+        </ion-list>
+    </ion-card>
+
+    <!-- More data and button to start/continue. -->
+    <ion-card *ngIf="quiz">
+        <ion-list>
+            <!-- Error messages. -->
+            <ion-item class="ion-text-wrap core-danger-item" *ngFor="let message of preventMessages">
+                <ion-label><p>{{ message }}</p></ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap core-danger-item" *ngIf="quiz.hasquestions === 0">
+                <ion-label><p>{{ 'addon.mod_quiz.noquestions' | translate }}</p></ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap core-danger-item" *ngIf="!hasSupportedQuestions && unsupportedQuestions.length">
+                <ion-label>
+                    <p>{{ 'addon.mod_quiz.errorquestionsnotsupported' | translate }}</p>
+                    <p *ngFor="let type of unsupportedQuestions">{{ type }}</p>
+                </ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap core-danger-item" *ngIf="unsupportedRules.length">
+                <ion-label>
+                    <p>{{ 'addon.mod_quiz.errorrulesnotsupported' | translate }}</p>
+                    <p *ngFor="let name of unsupportedRules">{{ name }}</p>
+                </ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap core-danger-item" *ngIf="behaviourSupported === false">
+                <ion-label>
+                    <p>{{ 'addon.mod_quiz.errorbehaviournotsupported' | translate }}</p>
+                    <p>{{ quiz.preferredbehaviour }}</p>
+                </ion-label>
+            </ion-item>
+
+            <!-- Quiz has data to be synchronized -->
+            <ion-card class="core-warning-card" *ngIf="buttonText && hasOffline && !showStatusSpinner">
+                <ion-item class="ion-text-wrap">
+                    <ion-icon name="fas-exclamation-triangle" slot="start"></ion-icon>
+                    <ion-label>{{ 'core.hasdatatosync' | translate: {$a: moduleName} }}</ion-label>
+                </ion-item>
+            </ion-card>
+
+            <!-- Other warnings. -->
+            <ion-item class="core-warning-item ion-text-wrap" *ngIf="hasSupportedQuestions && unsupportedQuestions.length">
+                <ion-label>
+                    <p>{{ 'addon.mod_quiz.canattemptbutnotsubmit' | translate }}</p>
+                    <p>{{ 'addon.mod_quiz.warningquestionsnotsupported' | translate }}</p>
+                    <p *ngFor="let type of unsupportedQuestions">{{ type }}</p>
+                </ion-label>
+            </ion-item>
+
+            <!-- Button to start/continue. -->
+            <ion-button *ngIf="buttonText && !showStatusSpinner" expand="block" (click)="attemptQuiz()" class="ion-margin">
+                {{ buttonText | translate }}
+            </ion-button>
+
+            <!-- Button to open in browser if it cannot be attempted in the app. -->
+            <ion-button class="ion-margin" *ngIf="!buttonText && ((!hasSupportedQuestions && unsupportedQuestions.length) ||
+                unsupportedRules.length || behaviourSupported === false)" expand="block" [href]="externalUrl" core-link>
+                {{ 'core.openinbrowser' | translate }}
+                <ion-icon name="fas-external-link-alt" slot="end"></ion-icon>
+            </ion-button>
+
+            <!-- Spinner shown while downloading or calculating. -->
+            <ion-item class="ion-text-center" *ngIf="showStatusSpinner">
+                <ion-label><ion-spinner></ion-spinner></ion-label>
+            </ion-item>
+        </ion-list>
+    </ion-card>
+</core-loading>

src/addons/mod/quiz/components/index/index.scss

@@ -0,0 +1,37 @@
+:host {
+
+    .addon-mod_quiz-table {
+        .addon-mod_quiz-table-header {
+            --detail-icon-opacity: 0;
+        }
+
+        ion-card-content {
+            padding-left: 0;
+            padding-right: 0;
+        }
+
+        .item:nth-child(even) {
+            --background: var(--light);
+        }
+
+        .addon-mod_quiz-highlighted,
+        .item.addon-mod_quiz-highlighted,
+        .addon-mod_quiz-highlighted p,
+        .item.addon-mod_quiz-highlighted p {
+            --background: var(--blue-light);
+            color: var(--blue-dark);
+        }
+    }
+}
+
+:host-context(body.dark) {
+    .addon-mod_quiz-table {
+        .addon-mod_quiz-highlighted,
+        .item.addon-mod_quiz-highlighted,
+        .addon-mod_quiz-highlighted p,
+        .item.addon-mod_quiz-highlighted p {
+            --background: var(--blue-dark);
+            color: var(--blue-light);
+        }
+    }
+}

src/addons/mod/quiz/components/index/index.ts

@@ -0,0 +1,674 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { CoreConstants } from '@/core/constants';
+import { Component, OnDestroy, OnInit, Optional } from '@angular/core';
+
+import { CoreCourseModuleMainActivityComponent } from '@features/course/classes/main-activity-component';
+import { CoreCourseContentsPage } from '@features/course/pages/contents/contents';
+import { CoreCourse } from '@features/course/services/course';
+import { CoreCourseModulePrefetchDelegate } from '@features/course/services/module-prefetch-delegate';
+import { CoreQuestionBehaviourDelegate } from '@features/question/services/behaviour-delegate';
+import { IonContent } from '@ionic/angular';
+import { CoreNavigator } from '@services/navigator';
+import { CoreDomUtils } from '@services/utils/dom';
+import { CoreTextUtils } from '@services/utils/text';
+import { CoreUtils } from '@services/utils/utils';
+import { Translate } from '@singletons';
+import { CoreEventObserver, CoreEvents } from '@singletons/events';
+import { AddonModQuizPrefetchHandler } from '../../services/handlers/prefetch';
+import {
+    AddonModQuiz,
+    AddonModQuizAttemptFinishedData,
+    AddonModQuizAttemptWSData,
+    AddonModQuizCombinedReviewOptions,
+    AddonModQuizGetAttemptAccessInformationWSResponse,
+    AddonModQuizGetQuizAccessInformationWSResponse,
+    AddonModQuizGetUserBestGradeWSResponse,
+    AddonModQuizProvider,
+} from '../../services/quiz';
+import { AddonModQuizAttempt, AddonModQuizHelper, AddonModQuizQuizData } from '../../services/quiz-helper';
+import {
+    AddonModQuizAutoSyncData,
+    AddonModQuizSync,
+    AddonModQuizSyncProvider,
+    AddonModQuizSyncResult,
+} from '../../services/quiz-sync';
+
+/**
+ * Component that displays a quiz entry page.
+ */
+@Component({
+    selector: 'addon-mod-quiz-index',
+    templateUrl: 'addon-mod-quiz-index.html',
+    styleUrls: ['index.scss'],
+})
+export class AddonModQuizIndexComponent extends CoreCourseModuleMainActivityComponent implements OnInit, OnDestroy {
+
+    component = AddonModQuizProvider.COMPONENT;
+    moduleName = 'quiz';
+    quiz?: AddonModQuizQuizData; // The quiz.
+    now?: number; // Current time.
+    syncTime?: string; // Last synchronization time.
+    hasOffline = false; // Whether the quiz has offline data.
+    hasSupportedQuestions = false; // Whether the quiz has at least 1 supported question.
+    accessRules: string[] = []; // List of access rules of the quiz.
+    unsupportedRules: string[] = []; // List of unsupported access rules of the quiz.
+    unsupportedQuestions: string[] = []; // List of unsupported question types of the quiz.
+    behaviourSupported = false; // Whether the quiz behaviour is supported.
+    showResults = false; // Whether to show the result of the quiz (grade, etc.).
+    gradeOverridden = false; // Whether grade has been overridden.
+    gradebookFeedback?: string; // The feedback in the gradebook.
+    gradeResult?: string; // Message with the grade.
+    overallFeedback?: string; // The feedback for the grade.
+    buttonText?: string; // Text to display in the start/continue button.
+    preventMessages: string[] = []; // List of messages explaining why the quiz cannot be attempted.
+    showStatusSpinner = true; // Whether to show a spinner due to quiz status.
+    gradeMethodReadable?: string; // Grade method in a readable format.
+    showReviewColumn = false; // Whether to show the review column.
+    attempts: AddonModQuizAttempt[] = []; // List of attempts the user has made.
+
+    protected fetchContentDefaultError = 'addon.mod_quiz.errorgetquiz'; // Default error to show when loading contents.
+    protected syncEventName = AddonModQuizSyncProvider.AUTO_SYNCED;
+
+    // protected quizData: any; // Quiz instance. This variable will store the quiz instance until it's ready to be shown
+    protected autoReview?: AddonModQuizAttemptFinishedData; // Data to auto-review an attempt after finishing.
+    protected quizAccessInfo?: AddonModQuizGetQuizAccessInformationWSResponse; // Quiz access info.
+    protected attemptAccessInfo?: AddonModQuizGetAttemptAccessInformationWSResponse; // Last attempt access info.
+    protected moreAttempts = false; // Whether user can create/continue attempts.
+    protected options?: AddonModQuizCombinedReviewOptions; // Combined review options.
+    protected bestGrade?: AddonModQuizGetUserBestGradeWSResponse; // Best grade data.
+    protected gradebookData?: { grade?: number; feedback?: string }; // The gradebook grade and feedback.
+    protected overallStats = false; // Equivalent to overallstats in mod_quiz_view_object in Moodle.
+    protected finishedObserver?: CoreEventObserver; // It will observe attempt finished events.
+    protected hasPlayed = false; // Whether the user has gone to the quiz player (attempted).
+    protected candidateQuiz?: AddonModQuizQuizData;
+
+    constructor(
+        protected content?: IonContent,
+        @Optional() courseContentsPage?: CoreCourseContentsPage,
+    ) {
+        super('AddonModQuizIndexComponent', content, courseContentsPage);
+    }
+
+    /**
+     * Component being initialized.
+     */
+    async ngOnInit(): Promise<void> {
+        super.ngOnInit();
+
+        // Listen for attempt finished events.
+        this.finishedObserver = CoreEvents.on<AddonModQuizAttemptFinishedData>(
+            AddonModQuizProvider.ATTEMPT_FINISHED_EVENT,
+            (data) => {
+                // Go to review attempt if an attempt in this quiz was finished and synced.
+                if (this.quiz && data.quizId == this.quiz.id) {
+                    this.autoReview = data;
+                }
+            },
+            this.siteId,
+        );
+
+        await this.loadContent(false, true);
+
+        if (!this.quiz) {
+            return;
+        }
+
+        try {
+            await AddonModQuiz.instance.logViewQuiz(this.quiz.id, this.quiz.name);
+
+            CoreCourse.instance.checkModuleCompletion(this.courseId!, this.module!.completiondata);
+        } catch {
+            // Ignore errors.
+        }
+    }
+
+    /**
+     * Attempt the quiz.
+     */
+    async attemptQuiz(): Promise<void> {
+        if (this.showStatusSpinner || !this.quiz) {
+            // Quiz is being downloaded or synchronized, abort.
+            return;
+        }
+
+        if (!AddonModQuiz.instance.isQuizOffline(this.quiz)) {
+            // Quiz isn't offline, just open it.
+            return this.openQuiz();
+        }
+
+        // Quiz supports offline, check if it needs to be downloaded.
+        // If the site doesn't support check updates, always prefetch it because we cannot tell if there's something new.
+        const isDownloaded = this.currentStatus == CoreConstants.DOWNLOADED;
+
+        if (isDownloaded && CoreCourseModulePrefetchDelegate.instance.canCheckUpdates()) {
+            // Already downloaded, open it.
+            return this.openQuiz();
+        }
+
+        // Prefetch the quiz.
+        this.showStatusSpinner = true;
+
+        try {
+            await AddonModQuizPrefetchHandler.instance.prefetch(this.module!, this.courseId, true);
+
+            // Success downloading, open quiz.
+            this.openQuiz();
+        } catch (error) {
+            if (this.hasOffline || (isDownloaded && !CoreCourseModulePrefetchDelegate.instance.canCheckUpdates())) {
+                // Error downloading but there is something offline, allow continuing it.
+                // If the site doesn't support check updates, continue too because we cannot tell if there's something new.
+                this.openQuiz();
+            } else {
+                CoreDomUtils.instance.showErrorModalDefault(error, 'core.errordownloading', true);
+            }
+        } finally {
+            this.showStatusSpinner = false;
+        }
+    }
+
+    /**
+     * Get the quiz data.
+     *
+     * @param refresh If it's refreshing content.
+     * @param sync If it should try to sync.
+     * @param showErrors If show errors to the user of hide them.
+     * @return Promise resolved when done.
+     */
+    protected async fetchContent(refresh: boolean = false, sync: boolean = false, showErrors: boolean = false): Promise<void> {
+        try {
+            // First get the quiz instance.
+            const quiz = await AddonModQuiz.instance.getQuiz(this.courseId!, this.module!.id);
+
+            this.gradeMethodReadable = AddonModQuiz.instance.getQuizGradeMethod(quiz.grademethod);
+            this.now = Date.now();
+            this.dataRetrieved.emit(quiz);
+            this.description = quiz.intro || this.description;
+            this.candidateQuiz = quiz;
+
+            // Try to get warnings from automatic sync.
+            const warnings = await AddonModQuizSync.instance.getSyncWarnings(quiz.id);
+
+            if (warnings?.length) {
+                // Show warnings and delete them so they aren't shown again.
+                CoreDomUtils.instance.showErrorModal(CoreTextUtils.instance.buildMessage(warnings));
+
+                await AddonModQuizSync.instance.setSyncWarnings(quiz.id, []);
+            }
+
+            if (AddonModQuiz.instance.isQuizOffline(quiz) && sync) {
+                // Try to sync the quiz.
+                try {
+                    await this.syncActivity(showErrors);
+                } catch {
+                    // Ignore errors, keep getting data even if sync fails.
+                    this.autoReview = undefined;
+                }
+            } else {
+                this.autoReview = undefined;
+                this.showStatusSpinner = false;
+            }
+
+            if (AddonModQuiz.instance.isQuizOffline(quiz)) {
+                // Handle status.
+                this.setStatusListener();
+
+                // Get last synchronization time and check if sync button should be seen.
+                this.syncTime = await AddonModQuizSync.instance.getReadableSyncTime(quiz.id);
+                this.hasOffline = await AddonModQuizSync.instance.hasDataToSync(quiz.id);
+            }
+
+            // Get quiz access info.
+            this.quizAccessInfo = await AddonModQuiz.instance.getQuizAccessInformation(quiz.id, { cmId: this.module!.id });
+
+            this.showReviewColumn = this.quizAccessInfo.canreviewmyattempts;
+            this.accessRules = this.quizAccessInfo.accessrules;
+            this.unsupportedRules = AddonModQuiz.instance.getUnsupportedRules(this.quizAccessInfo.activerulenames);
+
+            if (quiz.preferredbehaviour) {
+                this.behaviourSupported = CoreQuestionBehaviourDelegate.instance.isBehaviourSupported(quiz.preferredbehaviour);
+            }
+
+            // Get question types in the quiz.
+            const types = await AddonModQuiz.instance.getQuizRequiredQtypes(quiz.id, { cmId: this.module!.id });
+
+            this.unsupportedQuestions = AddonModQuiz.instance.getUnsupportedQuestions(types);
+            this.hasSupportedQuestions = !!types.find((type) => type != 'random' && this.unsupportedQuestions.indexOf(type) == -1);
+
+            await this.getAttempts(quiz);
+
+            // Quiz is ready to be shown, move it to the variable that is displayed.
+            this.quiz = quiz;
+        } finally {
+            this.fillContextMenu(refresh);
+        }
+    }
+
+    /**
+     * Get the user attempts in the quiz and the result info.
+     *
+     * @param quiz Quiz instance.
+     * @return Promise resolved when done.
+     */
+    protected async getAttempts(quiz: AddonModQuizQuizData): Promise<void> {
+
+        // Get access information of last attempt (it also works if no attempts made).
+        this.attemptAccessInfo = await AddonModQuiz.instance.getAttemptAccessInformation(quiz.id, 0, { cmId: this.module!.id });
+
+        // Get attempts.
+        const attempts = await AddonModQuiz.instance.getUserAttempts(quiz.id, { cmId: this.module!.id });
+
+        this.attempts = await this.treatAttempts(quiz, attempts);
+
+        // Check if user can create/continue attempts.
+        if (this.attempts.length) {
+            const last = this.attempts[this.attempts.length - 1];
+            this.moreAttempts = !AddonModQuiz.instance.isAttemptFinished(last.state) || !this.attemptAccessInfo.isfinished;
+        } else {
+            this.moreAttempts = !this.attemptAccessInfo.isfinished;
+        }
+
+        this.getButtonText(quiz);
+
+        await this.getResultInfo(quiz);
+    }
+
+    /**
+     * Get the text to show in the button. It also sets restriction messages if needed.
+     *
+     * @param quiz Quiz.
+     */
+    protected getButtonText(quiz: AddonModQuizQuizData): void {
+        this.buttonText = '';
+
+        if (quiz.hasquestions !== 0) {
+            if (this.attempts.length && !AddonModQuiz.instance.isAttemptFinished(this.attempts[this.attempts.length - 1].state)) {
+                // Last attempt is unfinished.
+                if (this.quizAccessInfo?.canattempt) {
+                    this.buttonText = 'addon.mod_quiz.continueattemptquiz';
+                } else if (this.quizAccessInfo?.canpreview) {
+                    this.buttonText = 'addon.mod_quiz.continuepreview';
+                }
+
+            } else {
+                // Last attempt is finished or no attempts.
+                if (this.quizAccessInfo?.canattempt) {
+                    this.preventMessages = this.attemptAccessInfo?.preventnewattemptreasons || [];
+                    if (!this.preventMessages.length) {
+                        if (!this.attempts.length) {
+                            this.buttonText = 'addon.mod_quiz.attemptquiznow';
+                        } else {
+                            this.buttonText = 'addon.mod_quiz.reattemptquiz';
+                        }
+                    }
+                } else if (this.quizAccessInfo?.canpreview) {
+                    this.buttonText = 'addon.mod_quiz.previewquiznow';
+                }
+            }
+        }
+
+        if (!this.buttonText) {
+            return;
+        }
+
+        // So far we think a button should be printed, check if they will be allowed to access it.
+        this.preventMessages = this.quizAccessInfo?.preventaccessreasons || [];
+
+        if (!this.moreAttempts) {
+            this.buttonText = '';
+        } else if (this.quizAccessInfo?.canattempt && this.preventMessages.length) {
+            this.buttonText = '';
+        } else if (!this.hasSupportedQuestions || this.unsupportedRules.length || !this.behaviourSupported) {
+            this.buttonText = '';
+        }
+    }
+
+    /**
+     * Get result info to show.
+     *
+     * @param quiz Quiz.
+     * @return Promise resolved when done.
+     */
+    protected async getResultInfo(quiz: AddonModQuizQuizData): Promise<void> {
+
+        if (!this.attempts.length || !quiz.showGradeColumn || !this.bestGrade?.hasgrade ||
+            this.gradebookData?.grade === undefined) {
+            this.showResults = false;
+
+            return;
+        }
+
+        const formattedGradebookGrade = AddonModQuiz.instance.formatGrade(this.gradebookData.grade, quiz.decimalpoints);
+        const formattedBestGrade = AddonModQuiz.instance.formatGrade(this.bestGrade.grade, quiz.decimalpoints);
+        let gradeToShow = formattedGradebookGrade; // By default we show the grade in the gradebook.
+
+        this.showResults = true;
+        this.gradeOverridden = formattedGradebookGrade != formattedBestGrade;
+        this.gradebookFeedback = this.gradebookData.feedback;
+
+        if (this.bestGrade.grade! > this.gradebookData.grade && this.gradebookData.grade == quiz.grade) {
+            // The best grade is higher than the max grade for the quiz.
+            // We'll do like Moodle web and show the best grade instead of the gradebook grade.
+            this.gradeOverridden = false;
+            gradeToShow = formattedBestGrade;
+        }
+
+        if (this.overallStats) {
+            // Show the quiz grade. The message shown is different if the quiz is finished.
+            if (this.moreAttempts) {
+                this.gradeResult = Translate.instance.instant('addon.mod_quiz.gradesofar', { $a: {
+                    method: this.gradeMethodReadable,
+                    mygrade: gradeToShow,
+                    quizgrade: quiz.gradeFormatted,
+                } });
+            } else {
+                const outOfShort = Translate.instance.instant('addon.mod_quiz.outofshort', { $a: {
+                    grade: gradeToShow,
+                    maxgrade: quiz.gradeFormatted,
+                } });
+
+                this.gradeResult = Translate.instance.instant('addon.mod_quiz.yourfinalgradeis', { $a: outOfShort });
+            }
+        }
+
+        if (quiz.showFeedbackColumn) {
+            // Get the quiz overall feedback.
+            const response = await AddonModQuiz.instance.getFeedbackForGrade(quiz.id, this.gradebookData.grade, {
+                cmId: this.module!.id,
+            });
+
+            this.overallFeedback = response.feedbacktext;
+        }
+    }
+
+    /**
+     * Go to review an attempt that has just been finished.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async goToAutoReview(): Promise<void> {
+        if (!this.autoReview) {
+            return;
+        }
+
+        // If we go to auto review it means an attempt was finished. Check completion status.
+        CoreCourse.instance.checkModuleCompletion(this.courseId!, this.module!.completiondata);
+
+        // Verify that user can see the review.
+        const attemptId = this.autoReview.attemptId;
+
+        if (this.quizAccessInfo?.canreviewmyattempts) {
+            try {
+                await AddonModQuiz.instance.getAttemptReview(attemptId, { page: -1, cmId: this.module!.id });
+
+                await CoreNavigator.instance.navigate(`review/${attemptId}`);
+            } catch {
+                // Ignore errors.
+            }
+        }
+    }
+
+    /**
+     * Checks if sync has succeed from result sync data.
+     *
+     * @param result Data returned on the sync function.
+     * @return If suceed or not.
+     */
+    protected hasSyncSucceed(result: AddonModQuizSyncResult): boolean {
+        if (result.attemptFinished) {
+            // An attempt was finished, check completion status.
+            CoreCourse.instance.checkModuleCompletion(this.courseId!, this.module!.completiondata);
+        }
+
+        // If the sync call isn't rejected it means the sync was successful.
+        return result.updated;
+    }
+
+    /**
+     * User entered the page that contains the component.
+     */
+    async ionViewDidEnter(): Promise<void> {
+        super.ionViewDidEnter();
+
+        if (!this.hasPlayed) {
+            this.autoReview = undefined;
+
+            return;
+        }
+
+        this.hasPlayed = false;
+        let promise = Promise.resolve();
+
+        // Update data when we come back from the player since the attempt status could have changed.
+        // Check if we need to go to review an attempt automatically.
+        if (this.autoReview && this.autoReview.synced) {
+            promise = this.goToAutoReview();
+            this.autoReview = undefined;
+        }
+
+        // Refresh data.
+        this.loaded = false;
+        this.refreshIcon = CoreConstants.ICON_LOADING;
+        this.syncIcon = CoreConstants.ICON_LOADING;
+        this.content?.scrollToTop();
+
+        await promise;
+        await CoreUtils.instance.ignoreErrors(this.refreshContent(true));
+
+        this.loaded = true;
+        this.refreshIcon = CoreConstants.ICON_REFRESH;
+        this.syncIcon = CoreConstants.ICON_SYNC;
+    }
+
+    /**
+     * User left the page that contains the component.
+     */
+    ionViewDidLeave(): void {
+        super.ionViewDidLeave();
+        this.autoReview = undefined;
+    }
+
+    /**
+     * Perform the invalidate content function.
+     *
+     * @return Resolved when done.
+     */
+    protected async invalidateContent(): Promise<void> {
+        const promises: Promise<void>[] = [];
+
+        promises.push(AddonModQuiz.instance.invalidateQuizData(this.courseId!));
+
+        if (this.quiz) {
+            promises.push(AddonModQuiz.instance.invalidateUserAttemptsForUser(this.quiz.id));
+            promises.push(AddonModQuiz.instance.invalidateQuizAccessInformation(this.quiz.id));
+            promises.push(AddonModQuiz.instance.invalidateQuizRequiredQtypes(this.quiz.id));
+            promises.push(AddonModQuiz.instance.invalidateAttemptAccessInformation(this.quiz.id));
+            promises.push(AddonModQuiz.instance.invalidateCombinedReviewOptionsForUser(this.quiz.id));
+            promises.push(AddonModQuiz.instance.invalidateUserBestGradeForUser(this.quiz.id));
+            promises.push(AddonModQuiz.instance.invalidateGradeFromGradebook(this.courseId!));
+        }
+
+        await Promise.all(promises);
+    }
+
+    /**
+     * Compares sync event data with current data to check if refresh content is needed.
+     *
+     * @param syncEventData Data receiven on sync observer.
+     * @return True if refresh is needed, false otherwise.
+     */
+    protected isRefreshSyncNeeded(syncEventData: AddonModQuizAutoSyncData): boolean {
+        if (!this.courseId || !this.module) {
+            return false;
+        }
+
+        if (syncEventData.attemptFinished) {
+            // An attempt was finished, check completion status.
+            CoreCourse.instance.checkModuleCompletion(this.courseId, this.module.completiondata);
+        }
+
+        if (this.quiz && syncEventData.quizId == this.quiz.id) {
+            this.content?.scrollToTop();
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Open a quiz to attempt it.
+     */
+    protected openQuiz(): void {
+        this.hasPlayed = true;
+
+        CoreNavigator.instance.navigate('player', {
+            params: {
+                moduleUrl: this.module?.url,
+            },
+        });
+    }
+
+    /**
+     * Displays some data based on the current status.
+     *
+     * @param status The current status.
+     * @param previousStatus The previous status. If not defined, there is no previous status.
+     */
+    protected showStatus(status: string, previousStatus?: string): void {
+        this.showStatusSpinner = status == CoreConstants.DOWNLOADING;
+
+        if (status == CoreConstants.DOWNLOADED && previousStatus == CoreConstants.DOWNLOADING) {
+            // Quiz downloaded now, maybe a new attempt was created. Load content again.
+            this.loaded = false;
+            this.loadContent();
+        }
+    }
+
+    /**
+     * Performs the sync of the activity.
+     *
+     * @return Promise resolved when done.
+     */
+    protected sync(): Promise<AddonModQuizSyncResult> {
+        return AddonModQuizSync.instance.syncQuiz(this.candidateQuiz!, true);
+    }
+
+    /**
+     * Treat user attempts.
+     *
+     * @param attempts The attempts to treat.
+     * @return Promise resolved when done.
+     */
+    protected async treatAttempts(
+        quiz: AddonModQuizQuizData,
+        attempts: AddonModQuizAttemptWSData[],
+    ): Promise<AddonModQuizAttempt[]> {
+        if (!attempts || !attempts.length) {
+            // There are no attempts to treat.
+            return [];
+        }
+
+        const lastFinished = AddonModQuiz.instance.getLastFinishedAttemptFromList(attempts);
+        const promises: Promise<unknown>[] = [];
+
+        if (this.autoReview && lastFinished && lastFinished.id >= this.autoReview.attemptId) {
+            // User just finished an attempt in offline and it seems it's been synced, since it's finished in online.
+            // Go to the review of this attempt if the user hasn't left this view.
+            if (!this.isDestroyed && this.isCurrentView) {
+                promises.push(this.goToAutoReview());
+            }
+            this.autoReview = undefined;
+        }
+
+        // Get combined review options.
+        promises.push(AddonModQuiz.instance.getCombinedReviewOptions(quiz.id, { cmId: this.module!.id }).then((options) => {
+            this.options = options;
+
+            return;
+        }));
+
+        // Get best grade.
+        promises.push(this.getQuizGrade(quiz));
+
+        await Promise.all(promises);
+
+        const grade = typeof this.gradebookData?.grade != 'undefined' ? this.gradebookData.grade : this.bestGrade?.grade;
+        const quizGrade = AddonModQuiz.instance.formatGrade(grade, quiz.decimalpoints);
+
+        // Calculate data to construct the header of the attempts table.
+        AddonModQuizHelper.instance.setQuizCalculatedData(quiz, this.options!);
+
+        this.overallStats = !!lastFinished && this.options!.alloptions.marks >= AddonModQuizProvider.QUESTION_OPTIONS_MARK_AND_MAX;
+
+        // Calculate data to show for each attempt.
+        const formattedAttempts = await Promise.all(attempts.map((attempt, index) => {
+            // Highlight the highest grade if appropriate.
+            const shouldHighlight = this.overallStats && quiz.grademethod == AddonModQuizProvider.GRADEHIGHEST &&
+                attempts.length > 1;
+            const isLast = index == attempts.length - 1;
+
+            return AddonModQuizHelper.instance.setAttemptCalculatedData(quiz, attempt, shouldHighlight, quizGrade, isLast);
+        }));
+
+        return formattedAttempts;
+    }
+
+    /**
+     * Get quiz grade data.
+     *
+     * @param quiz Quiz.
+     * @return Promise resolved when done.
+     */
+    protected async getQuizGrade(quiz: AddonModQuizQuizData): Promise<void> {
+        this.bestGrade = await AddonModQuiz.instance.getUserBestGrade(quiz.id, { cmId: this.module!.id });
+
+        try {
+            // Get gradebook grade.
+            const data = await AddonModQuiz.instance.getGradeFromGradebook(this.courseId!, this.module!.id);
+
+            if (data) {
+                this.gradebookData = {
+                    grade: 'graderaw' in data ? data.graderaw : Number(data.grade),
+                    feedback: data.feedback,
+                };
+            }
+        } catch {
+            // Fallback to quiz best grade if failure or not found.
+            this.gradebookData = {
+                grade: this.bestGrade.grade,
+            };
+        }
+    }
+
+    /**
+     * Go to page to view the attempt details.
+     *
+     * @return Promise resolved when done.
+     */
+    async viewAttempt(attemptId: number): Promise<void> {
+        CoreNavigator.instance.navigate(`attempt/${attemptId}`);
+    }
+
+    /**
+     * Component being destroyed.
+     */
+    ngOnDestroy(): void {
+        super.ngOnDestroy();
+
+        this.finishedObserver?.off();
+    }
+
+}

src/addons/mod/quiz/components/navigation-modal/navigation-modal.html

@@ -0,0 +1,67 @@
+<ion-header>
+    <ion-toolbar>
+        <ion-title>{{ 'addon.mod_quiz.quiznavigation' | translate }}</ion-title>
+
+        <ion-buttons slot="end">
+            <ion-button (click)="closeModal()" [attr.aria-label]="'core.close' | translate">
+                <ion-icon slot="icon-only" name="fas-times"></ion-icon>
+            </ion-button>
+        </ion-buttons>
+    </ion-toolbar>
+</ion-header>
+<ion-content class="addon-mod_quiz-navigation-modal">
+    <nav>
+        <ion-list>
+            <!-- In player, show button to finish attempt. -->
+            <ion-item button class="ion-text-wrap" *ngIf="!isReview" (click)="loadPage(-1)" detail="true">
+                <ion-label>{{ 'addon.mod_quiz.finishattemptdots' | translate }}</ion-label>
+            </ion-item>
+
+            <!-- In review we can toggle between all questions in same page or one page at a time. -->
+            <ion-item button class="ion-text-wrap" *ngIf="isReview && numPages > 1" (click)="switchMode()" detail="true">
+                <ion-label>
+                    <span *ngIf="!showAll">{{ 'addon.mod_quiz.showall' | translate }}</span>
+                    <span *ngIf="showAll">{{ 'addon.mod_quiz.showeachpage' | translate }}</span>
+                </ion-label>
+            </ion-item>
+
+            <ion-item button class="ion-text-wrap {{question.stateClass}}" *ngFor="let question of navigation"
+                [ngClass]='{"core-selected-item": !summaryShown && currentPage == question.page}'
+                (click)="loadPage(question.page, question.slot)" detail="true">
+
+                <ion-label>
+                    <span *ngIf="question.number">{{ 'core.question.questionno' | translate:{$a: question.number} }}</span>
+                    <span *ngIf="!question.number">{{ 'core.question.information' | translate }}</span>
+                </ion-label>
+
+                <ion-icon *ngIf="!question.number" name="fas-info-circle" slot="end"></ion-icon>
+                <ion-icon *ngIf="question.stateClass == 'core-question-requiresgrading'" name="fas-question-circle"
+                    [attr.aria-label]="question.status" slot="end">
+                </ion-icon>
+                <ion-icon *ngIf="question.stateClass == 'core-question-correct'" name="fas-check" color="success"
+                    [attr.aria-label]="question.status" slot="end">
+                </ion-icon>
+                <ion-icon *ngIf="question.stateClass == 'core-question-partiallycorrect'" name="fas-check-square"
+                    color="warning" [attr.aria-label]="question.status" slot="end">
+                </ion-icon>
+                <ion-icon *ngIf="question.stateClass == 'core-question-incorrect' ||
+                    question.stateClass == 'core-question-notanswered'" name="fas-times" color="danger"
+                    [attr.aria-label]="question.status" slot="end">
+                </ion-icon>
+            </ion-item>
+
+            <!-- In player, show button to finish attempt. -->
+            <ion-item button class="ion-text-wrap" *ngIf="!isReview" (click)="loadPage(-1)" detail="true">
+                <ion-label>{{ 'addon.mod_quiz.finishattemptdots' | translate }}</ion-label>
+            </ion-item>
+
+            <!-- In review we can toggle between all questions in same page or one page at a time. -->
+            <ion-item button class="ion-text-wrap" *ngIf="isReview && numPages > 1" (click)="switchMode()" detail="true">
+                <ion-label>
+                    <span *ngIf="!showAll">{{ 'addon.mod_quiz.showall' | translate }}</span>
+                    <span *ngIf="showAll">{{ 'addon.mod_quiz.showeachpage' | translate }}</span>
+                </ion-label>
+            </ion-item>
+        </ion-list>
+    </nav>
+</ion-content>

src/addons/mod/quiz/components/navigation-modal/navigation-modal.ts

@@ -0,0 +1,76 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, Input } from '@angular/core';
+
+import { CoreQuestionQuestionParsed } from '@features/question/services/question';
+import { ModalController } from '@singletons';
+
+/**
+ * Modal that renders the quiz navigation.
+ */
+@Component({
+    selector: 'addon-mod-quiz-navigation-modal',
+    templateUrl: 'navigation-modal.html',
+})
+export class AddonModQuizNavigationModalComponent {
+
+    static readonly CHANGE_PAGE = 1;
+    static readonly SWITCH_MODE = 2;
+
+    @Input() navigation?: AddonModQuizNavigationQuestion[]; // Whether the user is reviewing the attempt.
+    @Input() summaryShown?: boolean; // Whether summary is currently being shown.
+    @Input() currentPage?: number; // Current page.
+    @Input() isReview?: boolean; // Whether the user is reviewing the attempt.
+    @Input() numPages = 0; // Num of pages for review mode.
+    @Input() showAll?: boolean; // Whether to show all questions in same page or not for review mode.
+
+    /**
+     * Close modal.
+     */
+    closeModal(): void {
+        ModalController.instance.dismiss();
+    }
+
+    /**
+     * Load a certain page.
+     *
+     * @param page The page to load.
+     * @param slot Slot of the question to scroll to.
+     */
+    loadPage(page: number, slot?: number): void {
+        ModalController.instance.dismiss({
+            action: AddonModQuizNavigationModalComponent.CHANGE_PAGE,
+            page,
+            slot,
+        });
+    }
+
+    /**
+     * Switch mode in review.
+     */
+    switchMode(): void {
+        ModalController.instance.dismiss({
+            action: AddonModQuizNavigationModalComponent.SWITCH_MODE,
+        });
+    }
+
+}
+
+/**
+ * Question for the navigation menu with some calculated data.
+ */
+export type AddonModQuizNavigationQuestion = CoreQuestionQuestionParsed & {
+    stateClass?: string;
+};

src/addons/mod/quiz/components/preflight-modal/preflight-modal.html

@@ -0,0 +1,32 @@
+<ion-header>
+    <ion-toolbar>
+        <ion-title>{{ title | translate }}</ion-title>
+
+        <ion-buttons slot="end">
+            <ion-button (click)="closeModal()" [attr.aria-label]="'core.close' | translate">
+                <ion-icon slot="icon-only" name="fas-times"></ion-icon>
+            </ion-button>
+        </ion-buttons>
+    </ion-toolbar>
+</ion-header>
+<ion-content class="addon-mod_quiz-preflight-modal">
+    <core-loading [hideUntil]="loaded">
+        <form [formGroup]="preflightForm" (ngSubmit)="sendData($event)" #preflightFormEl>
+            <ion-list>
+                <!-- Access rules. -->
+                <ng-container *ngFor="let data of accessRulesData; let last = last">
+                    <core-dynamic-component [component]="data.component" [data]="data.data">
+                        <p class="ion-padding">Couldn't find the directive to render this access rule.</p>
+                    </core-dynamic-component>
+                    <ion-item-divider *ngIf="!last"><ion-label></ion-label></ion-item-divider>
+                </ng-container>
+
+                <ion-button expand="block" type="submit" class="ion-margin">
+                    {{ title | translate }}
+                </ion-button>
+                <!-- Remove this once Ionic fixes this bug: https://github.com/ionic-team/ionic-framework/issues/19368 -->
+                <input type="submit" class="core-submit-hidden-enter" />
+            </ion-list>
+        </form>
+    </core-loading>
+</ion-content>

src/addons/mod/quiz/components/preflight-modal/preflight-modal.ts

@@ -0,0 +1,144 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, OnInit, ViewChild, ElementRef, Input, Type } from '@angular/core';
+import { FormBuilder, FormGroup } from '@angular/forms';
+import { IonContent } from '@ionic/angular';
+import { CoreSites } from '@services/sites';
+
+import { CoreDomUtils } from '@services/utils/dom';
+import { ModalController, Translate } from '@singletons';
+import { AddonModQuizAccessRuleDelegate } from '../../services/access-rules-delegate';
+import { AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from '../../services/quiz';
+
+/**
+ * Modal that renders the access rules for a quiz.
+ */
+@Component({
+    selector: 'page-addon-mod-quiz-preflight-modal',
+    templateUrl: 'preflight-modal.html',
+})
+export class AddonModQuizPreflightModalComponent implements OnInit {
+
+    @ViewChild(IonContent) content?: IonContent;
+    @ViewChild('preflightFormEl') formElement?: ElementRef;
+
+    @Input() title!: string;
+    @Input() quiz?: AddonModQuizQuizWSData;
+    @Input() attempt?: AddonModQuizAttemptWSData;
+    @Input() prefetch?: boolean;
+    @Input() siteId!: string;
+    @Input() rules!: string[];
+
+    preflightForm: FormGroup;
+    accessRulesData: { component: Type<unknown>; data: Record<string, unknown>}[] = []; // Component and data for each access rule.
+    loaded = false;
+
+    constructor(
+        formBuilder: FormBuilder,
+        protected elementRef: ElementRef,
+    ) {
+        // Create an empty form group. The controls will be added by the access rules components.
+        this.preflightForm = formBuilder.group({});
+    }
+
+    /**
+     * Component being initialized.
+     */
+    async ngOnInit(): Promise<void> {
+        this.title = this.title || Translate.instance.instant('addon.mod_quiz.startattempt');
+        this.siteId = this.siteId || CoreSites.instance.getCurrentSiteId();
+        this.rules = this.rules || [];
+
+        if (!this.quiz) {
+            return;
+        }
+
+        try {
+            await Promise.all(this.rules.map(async (rule) => {
+                // Check if preflight is required for rule and, if so, get the component to render it.
+                const required = await AddonModQuizAccessRuleDelegate.instance.isPreflightCheckRequiredForRule(
+                    rule,
+                    this.quiz!,
+                    this.attempt,
+                    this.prefetch,
+                    this.siteId,
+                );
+
+                if (!required) {
+                    return;
+                }
+
+                const component = await AddonModQuizAccessRuleDelegate.instance.getPreflightComponent(rule);
+                if (!component) {
+                    return;
+                }
+
+                this.accessRulesData.push({
+                    component: component,
+                    data: {
+                        rule: rule,
+                        quiz: this.quiz,
+                        attempt: this.attempt,
+                        prefetch: this.prefetch,
+                        form: this.preflightForm,
+                        siteId: this.siteId,
+                    },
+                });
+            }));
+
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'Error loading rules');
+        } finally {
+            this.loaded = true;
+        }
+    }
+
+    /**
+     * Check that the data is valid and send it back.
+     *
+     * @param e Event.
+     */
+    sendData(e: Event): void {
+        e.preventDefault();
+        e.stopPropagation();
+
+        if (!this.preflightForm.valid) {
+            // Form not valid. Scroll to the first element with errors.
+            const hasScrolled = CoreDomUtils.instance.scrollToInputError(
+                this.elementRef.nativeElement,
+                this.content,
+            );
+
+            if (!hasScrolled) {
+                // Input not found, show an error modal.
+                CoreDomUtils.instance.showErrorModal('core.errorinvalidform', true);
+            }
+        } else {
+            CoreDomUtils.instance.triggerFormSubmittedEvent(this.formElement, false, this.siteId);
+
+            ModalController.instance.dismiss(this.preflightForm.value);
+        }
+    }
+
+    /**
+     * Close modal.
+     */
+    closeModal(): void {
+        CoreDomUtils.instance.triggerFormCancelledEvent(this.formElement, this.siteId);
+
+        ModalController.instance.dismiss();
+    }
+
+}

src/addons/mod/quiz/lang.json

@@ -0,0 +1,83 @@
+{
+    "answercolon": "Answer:",
+    "attemptfirst": "First attempt",
+    "attemptlast": "Last attempt",
+    "attemptnumber": "Attempt",
+    "attemptquiznow": "Attempt quiz now",
+    "attemptstate": "State",
+    "canattemptbutnotsubmit": "You can attempt this quiz in the app, but you will need to submit the attempt in browser for the following reasons:",
+    "cannotsubmitquizdueto": "This quiz attempt cannot be submitted for the following reasons:",
+    "clearchoice": "Clear my choice",
+    "comment": "Comment",
+    "completedon": "Completed on",
+    "confirmclose": "Once you submit, you will no longer be able to change your answers for this attempt.",
+    "confirmcontinueoffline": "This attempt has not been synchronised since {{$a}}. If you have continued this attempt in another device since then, you may lose data.",
+    "confirmleavequizonerror": "An error occurred while saving the answers. Are you sure you want to leave the quiz?",
+    "confirmstart": "Your attempt will have a time limit of {{$a}}. When you start, the timer will begin to count down and cannot be paused. You must finish your attempt before it expires. Are you sure you wish to start now?",
+    "confirmstartheader": "Time limit",
+    "connectionerror": "Network connection lost. (Autosave failed).\n\nMake a note of any responses entered on this page in the last few minutes, then try to re-connect.\n\nOnce connection has been re-established, your responses should be saved and this message will disappear.",
+    "continueattemptquiz": "Continue the last attempt",
+    "continuepreview": "Continue the last preview",
+    "errorbehaviournotsupported": "This quiz can't be attempted in the app because the question behaviour is not supported by the app:",
+    "errordownloading": "Error downloading required data.",
+    "errorgetattempt": "Error getting attempt data.",
+    "errorgetquestions": "Error getting questions.",
+    "errorgetquiz": "Error getting quiz data.",
+    "errorparsequestions": "An error occurred while reading the questions. Please attempt this quiz in a web browser.",
+    "errorquestionsnotsupported": "This quiz can't be attempted in the app because it only contains questions not supported by the app:",
+    "errorrulesnotsupported": "This quiz can't be attempted in the app because it has access rules not supported by the app:",
+    "errorsaveattempt": "An error occurred while saving the attempt data.",
+    "feedback": "Feedback",
+    "finishattemptdots": "Finish attempt...",
+    "finishnotsynced": "Finished but not synchronised",
+    "grade": "Grade",
+    "gradeaverage": "Average grade",
+    "gradehighest": "Highest grade",
+    "grademethod": "Grading method",
+    "gradesofar": "{{$a.method}}: {{$a.mygrade}} / {{$a.quizgrade}}.",
+    "marks": "Marks",
+    "modulenameplural": "Quizzes",
+    "mustbesubmittedby": "This attempt must be submitted by {{$a}}.",
+    "noquestions": "No questions have been added yet",
+    "noreviewattempt": "You are not allowed to review this attempt.",
+    "notyetgraded": "Not yet graded",
+    "opentoc": "Open navigation popover",
+    "outof": "{{$a.grade}} out of {{$a.maxgrade}}",
+    "outofpercent": "{{$a.grade}} out of {{$a.maxgrade}} ({{$a.percent}}%)",
+    "outofshort": "{{$a.grade}}/{{$a.maxgrade}}",
+    "overallfeedback": "Overall feedback",
+    "overdue": "Overdue",
+    "overduemustbesubmittedby": "This attempt is now overdue. It should already have been submitted. If you would like this quiz to be graded, you must submit it by {{$a}}. If you do not submit it by then, no marks from this attempt will be counted.",
+    "preview": "Preview",
+    "previewquiznow": "Preview quiz now",
+    "question": "Question",
+    "quiznavigation": "Quiz navigation",
+    "quizpassword": "Quiz password",
+    "reattemptquiz": "Re-attempt quiz",
+    "requirepasswordmessage": "To attempt this quiz you need to know the quiz password",
+    "returnattempt": "Return to attempt",
+    "review": "Review",
+    "reviewofattempt": "Review of attempt {{$a}}",
+    "reviewofpreview": "Review of preview",
+    "showall": "Show all questions on one page",
+    "showeachpage": "Show one page at a time",
+    "startattempt": "Start attempt",
+    "startedon": "Started on",
+    "stateabandoned": "Never submitted",
+    "statefinished": "Finished",
+    "statefinisheddetails": "Submitted {{$a}}",
+    "stateinprogress": "In progress",
+    "stateoverdue": "Overdue",
+    "stateoverduedetails": "Must be submitted by {{$a}}",
+    "status": "Status",
+    "submitallandfinish": "Submit all and finish",
+    "summaryofattempt": "Summary of attempt",
+    "summaryofattempts": "Summary of your previous attempts",
+    "timeleft": "Time left",
+    "timetaken": "Time taken",
+    "warningattemptfinished": "Offline attempt discarded as it was finished on the site or not found.",
+    "warningdatadiscarded": "Some offline answers were discarded because the questions were modified online.",
+    "warningdatadiscardedfromfinished": "Attempt unfinished because some offline answers were discarded. Please review your answers then resubmit the attempt.",
+    "warningquestionsnotsupported": "This quiz contains questions not supported by the app:",
+    "yourfinalgradeis": "Your final grade for this quiz is {{$a}}."
+}

src/addons/mod/quiz/pages/attempt/attempt.html

@@ -0,0 +1,65 @@
+<ion-header>
+    <ion-toolbar>
+        <ion-buttons slot="start">
+            <ion-back-button [attr.aria-label]="'core.back' | translate"></ion-back-button>
+        </ion-buttons>
+        <ion-title>
+            <core-format-text *ngIf="quiz" [text]="quiz.name" contextLevel="module" [contextInstanceId]="quiz.coursemodule"
+                [courseId]="courseId">
+            </core-format-text>
+        </ion-title>
+    </ion-toolbar>
+</ion-header>
+<ion-content>
+    <ion-refresher slot="fixed" [disabled]="!loaded" (ionRefresh)="doRefresh($event.target)">
+        <ion-refresher-content pullingText="{{ 'core.pulltorefresh' | translate }}"></ion-refresher-content>
+    </ion-refresher>
+    <core-loading [hideUntil]="loaded">
+        <ion-list *ngIf="attempt" lines="none">
+            <ion-item class="ion-text-wrap">
+                <ion-label>
+                    <h2>{{ 'addon.mod_quiz.attemptnumber' | translate }}</h2>
+                    <p *ngIf="attempt.preview">{{ 'addon.mod_quiz.preview' | translate }}</p>
+                    <p *ngIf="!attempt.preview">{{ attempt.attempt }}</p>
+                </ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap">
+                <ion-label>
+                    <h2>{{ 'addon.mod_quiz.attemptstate' | translate }}</h2>
+                    <p *ngFor="let sentence of attempt.readableState">{{ sentence }}</p>
+                </ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap" *ngIf="quiz!.showMarkColumn && attempt.readableMark !== ''">
+                <ion-label>
+                    <h2>{{ 'addon.mod_quiz.marks' | translate }} / {{ quiz!.sumGradesFormatted }}</h2>
+                    <p>{{ attempt.readableMark }}</p>
+                </ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap" *ngIf="quiz!.showGradeColumn && attempt.readableGrade !== ''">
+                <ion-label>
+                    <h2>{{ 'addon.mod_quiz.grade' | translate }} / {{ quiz!.gradeFormatted }}</h2>
+                    <p>{{ attempt.readableGrade }}</p>
+                </ion-label>
+            </ion-item>
+            <ion-item class="ion-text-wrap" *ngIf="quiz!.showFeedbackColumn && feedback">
+                <ion-label>
+                    <h2>{{ 'addon.mod_quiz.feedback' | translate }}</h2>
+                    <p>
+                        <core-format-text [component]="component" [componentId]="componentId" [text]="feedback"
+                            contextLevel="module" [contextInstanceId]="cmId" [courseId]="courseId">
+                        </core-format-text>
+                    </p>
+                </ion-label>
+            </ion-item>
+            <ion-button *ngIf="showReviewColumn && attempt.finished" class="ion-margin" expand="block" (click)="reviewAttempt()">
+                <ion-icon name="fas-search" slot="start"></ion-icon>
+                {{ 'addon.mod_quiz.review' | translate }}
+            </ion-button>
+            <ion-item class="ion-text-wrap core-danger-item" *ngIf="!showReviewColumn">
+                <ion-label>
+                    <p>{{ 'addon.mod_quiz.noreviewattempt' | translate }}</p>
+                </ion-label>
+            </ion-item>
+        </ion-list>
+    </core-loading>
+</ion-content>

src/addons/mod/quiz/pages/attempt/attempt.module.ts

@@ -0,0 +1,38 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { NgModule } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { AddonModQuizAttemptPage } from './attempt';
+
+const routes: Routes = [
+    {
+        path: '',
+        component: AddonModQuizAttemptPage,
+    },
+];
+
+@NgModule({
+    imports: [
+        RouterModule.forChild(routes),
+        CoreSharedModule,
+    ],
+    declarations: [
+        AddonModQuizAttemptPage,
+    ],
+    exports: [RouterModule],
+})
+export class AddonModQuizAttemptPageModule {}

src/addons/mod/quiz/pages/attempt/attempt.ts

@@ -0,0 +1,200 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, OnInit } from '@angular/core';
+import { CoreError } from '@classes/errors/error';
+import { IonRefresher } from '@ionic/angular';
+import { CoreNavigator } from '@services/navigator';
+import { CoreDomUtils } from '@services/utils/dom';
+import { CoreUtils } from '@services/utils/utils';
+import { Translate } from '@singletons';
+import {
+    AddonModQuiz,
+    AddonModQuizAttemptWSData,
+    AddonModQuizGetQuizAccessInformationWSResponse,
+    AddonModQuizProvider,
+} from '../../services/quiz';
+import { AddonModQuizAttempt, AddonModQuizHelper, AddonModQuizQuizData } from '../../services/quiz-helper';
+
+/**
+ * Page that displays some summary data about an attempt.
+ */
+@Component({
+    selector: 'page-addon-mod-quiz-attempt',
+    templateUrl: 'attempt.html',
+})
+export class AddonModQuizAttemptPage implements OnInit {
+
+    courseId!: number; // The course ID the quiz belongs to.
+    quiz?: AddonModQuizQuizData; // The quiz the attempt belongs to.
+    attempt?: AddonModQuizAttempt; // The attempt to view.
+    component = AddonModQuizProvider.COMPONENT; // Component to link the files to.
+    componentId?: number; // Component ID to use in conjunction with the component.
+    loaded = false; // Whether data has been loaded.
+    feedback?: string; // Attempt feedback.
+    showReviewColumn = false;
+    cmId!: number; // Course module id the attempt belongs to.
+
+    protected attemptId!: number; // Attempt to view.
+
+    /**
+     * Component being initialized.
+     */
+    ngOnInit(): void {
+        this.cmId = CoreNavigator.instance.getRouteNumberParam('cmId')!;
+        this.courseId = CoreNavigator.instance.getRouteNumberParam('courseId')!;
+        this.attemptId = CoreNavigator.instance.getRouteNumberParam('attemptId')!;
+
+        this.fetchQuizData().finally(() => {
+            this.loaded = true;
+        });
+    }
+
+    /**
+     * Refresh the data.
+     *
+     * @param refresher Refresher.
+     */
+    doRefresh(refresher: IonRefresher): void {
+        this.refreshData().finally(() => {
+            refresher.complete();
+        });
+    }
+
+    /**
+     * Get quiz data and attempt data.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async fetchQuizData(): Promise<void> {
+        try {
+            this.quiz = await AddonModQuiz.instance.getQuiz(this.courseId, this.cmId);
+
+            this.componentId = this.quiz.coursemodule;
+
+            // Load attempt data.
+            const [options, accessInfo, attempt] = await Promise.all([
+                AddonModQuiz.instance.getCombinedReviewOptions(this.quiz.id, { cmId: this.quiz.coursemodule }),
+                this.fetchAccessInfo(),
+                this.fetchAttempt(),
+            ]);
+
+            // Set calculated data.
+            this.showReviewColumn = accessInfo.canreviewmyattempts;
+            AddonModQuizHelper.instance.setQuizCalculatedData(this.quiz, options);
+
+            this.attempt = await AddonModQuizHelper.instance.setAttemptCalculatedData(this.quiz!, attempt, false, undefined, true);
+
+            // Check if the feedback should be displayed.
+            const grade = Number(this.attempt!.rescaledGrade);
+
+            if (this.quiz.showFeedbackColumn && AddonModQuiz.instance.isAttemptFinished(this.attempt!.state) &&
+                    options.someoptions.overallfeedback && !isNaN(grade)) {
+
+                // Feedback should be displayed, get the feedback for the grade.
+                const response = await AddonModQuiz.instance.getFeedbackForGrade(this.quiz.id, grade, {
+                    cmId: this.quiz.coursemodule,
+                });
+
+                this.feedback = response.feedbacktext;
+            } else {
+                delete this.feedback;
+            }
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'addon.mod_quiz.errorgetattempt', true);
+        }
+    }
+
+    /**
+     * Get the attempt.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async fetchAttempt(): Promise<AddonModQuizAttemptWSData> {
+        // Get all the attempts and search the one we want.
+        const attempts = await AddonModQuiz.instance.getUserAttempts(this.quiz!.id, { cmId: this.cmId });
+
+        const attempt = attempts.find(attempt => attempt.id == this.attemptId);
+
+        if (!attempt) {
+            // Attempt not found, error.
+            this.attempt = undefined;
+
+            throw new CoreError(Translate.instance.instant('addon.mod_quiz.errorgetattempt'));
+        }
+
+        return attempt;
+    }
+
+    /**
+     * Get the access info.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async fetchAccessInfo(): Promise<AddonModQuizGetQuizAccessInformationWSResponse> {
+        const accessInfo = await AddonModQuiz.instance.getQuizAccessInformation(this.quiz!.id, { cmId: this.cmId });
+
+        if (!accessInfo.canreviewmyattempts) {
+            return accessInfo;
+        }
+
+        // Check if the user can review the attempt.
+        await CoreUtils.instance.ignoreErrors(AddonModQuiz.instance.invalidateAttemptReviewForPage(this.attemptId, -1));
+
+        try {
+            await AddonModQuiz.instance.getAttemptReview(this.attemptId, { page: -1, cmId: this.quiz!.coursemodule });
+        } catch {
+            // Error getting the review, assume the user cannot review the attempt.
+            accessInfo.canreviewmyattempts = false;
+        }
+
+        return accessInfo;
+    }
+
+    /**
+     * Refresh the data.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async refreshData(): Promise<void> {
+        const promises: Promise<void>[] = [];
+
+        promises.push(AddonModQuiz.instance.invalidateQuizData(this.courseId));
+        promises.push(AddonModQuiz.instance.invalidateAttemptReview(this.attemptId));
+
+        if (this.quiz) {
+            promises.push(AddonModQuiz.instance.invalidateUserAttemptsForUser(this.quiz.id));
+            promises.push(AddonModQuiz.instance.invalidateQuizAccessInformation(this.quiz.id));
+            promises.push(AddonModQuiz.instance.invalidateCombinedReviewOptionsForUser(this.quiz.id));
+
+            if (this.attempt && typeof this.feedback != 'undefined') {
+                promises.push(AddonModQuiz.instance.invalidateFeedback(this.quiz.id));
+            }
+        }
+
+        await CoreUtils.instance.ignoreErrors(Promise.all(promises));
+
+        await this.fetchQuizData();
+    }
+
+    /**
+     * Go to the page to review the attempt.
+     *
+     * @return Promise resolved when done.
+     */
+    async reviewAttempt(): Promise<void> {
+        CoreNavigator.instance.navigate(`../../review/${this.attempt!.id}`);
+    }
+
+}

src/addons/mod/quiz/pages/index/index.html

@@ -0,0 +1,22 @@
+<ion-header>
+    <ion-toolbar>
+        <ion-buttons slot="start">
+            <ion-back-button [attr.aria-label]="'core.back' | translate"></ion-back-button>
+        </ion-buttons>
+        <ion-title>
+            <core-format-text [text]="title" contextLevel="module" [contextInstanceId]="module?.id" [courseId]="courseId">
+            </core-format-text>
+        </ion-title>
+
+        <ion-buttons slot="end">
+            <!-- The buttons defined by the component will be added in here. -->
+        </ion-buttons>
+    </ion-toolbar>
+</ion-header>
+<ion-content>
+    <ion-refresher slot="fixed" [disabled]="!quizComponent?.loaded" (ionRefresh)="quizComponent?.doRefresh($event)">
+        <ion-refresher-content pullingText="{{ 'core.pulltorefresh' | translate }}"></ion-refresher-content>
+    </ion-refresher>
+
+    <addon-mod-quiz-index [module]="module" [courseId]="courseId" (dataRetrieved)="updateData($event)"></addon-mod-quiz-index>
+</ion-content>

src/addons/mod/quiz/pages/index/index.module.ts

@@ -0,0 +1,40 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { NgModule } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { AddonModQuizComponentsModule } from '../../components/components.module';
+import { AddonModQuizIndexPage } from './index';
+
+const routes: Routes = [
+    {
+        path: '',
+        component: AddonModQuizIndexPage,
+    },
+];
+
+@NgModule({
+    imports: [
+        RouterModule.forChild(routes),
+        CoreSharedModule,
+        AddonModQuizComponentsModule,
+    ],
+    declarations: [
+        AddonModQuizIndexPage,
+    ],
+    exports: [RouterModule],
+})
+export class AddonModQuizIndexPageModule {}

src/addons/mod/quiz/pages/index/index.ts

@@ -0,0 +1,69 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, OnInit, ViewChild } from '@angular/core';
+
+import { CoreCourseWSModule } from '@features/course/services/course';
+import { CoreNavigator } from '@services/navigator';
+import { AddonModQuizIndexComponent } from '../../components/index';
+import { AddonModQuizQuizWSData } from '../../services/quiz';
+
+/**
+ * Page that displays the quiz entry page.
+ */
+@Component({
+    selector: 'page-addon-mod-quiz-index',
+    templateUrl: 'index.html',
+})
+export class AddonModQuizIndexPage implements OnInit {
+
+    @ViewChild(AddonModQuizIndexComponent) quizComponent?: AddonModQuizIndexComponent;
+
+    title?: string;
+    module?: CoreCourseWSModule;
+    courseId?: number;
+
+    /**
+     * Component being initialized.
+     */
+    ngOnInit(): void {
+        this.module = CoreNavigator.instance.getRouteParam('module');
+        this.courseId = CoreNavigator.instance.getRouteNumberParam('courseId');
+        this.title = this.module?.name;
+    }
+
+    /**
+     * Update some data based on the quiz instance.
+     *
+     * @param quiz Quiz instance.
+     */
+    updateData(quiz: AddonModQuizQuizWSData): void {
+        this.title = quiz.name || this.title;
+    }
+
+    /**
+     * User entered the page.
+     */
+    ionViewDidEnter(): void {
+        this.quizComponent?.ionViewDidEnter();
+    }
+
+    /**
+     * User left the page.
+     */
+    ionViewDidLeave(): void {
+        this.quizComponent?.ionViewDidLeave();
+    }
+
+}

src/addons/mod/quiz/pages/player/player.html

@@ -0,0 +1,189 @@
+<ion-header>
+    <ion-toolbar>
+        <ion-buttons slot="start">
+            <ion-back-button [attr.aria-label]="'core.back' | translate"></ion-back-button>
+        </ion-buttons>
+        <ion-title>
+            <core-format-text *ngIf="quiz" [text]="quiz.name" contextLevel="module" [contextInstanceId]="quiz.coursemodule"
+                [courseId]="courseId">
+            </core-format-text>
+        </ion-title>
+
+        <ion-buttons slot="end">
+            <ion-button id="addon-mod_quiz-connection-error-button" [hidden]="!autoSaveError" (click)="showConnectionError($event)"
+                [attr.aria-label]="'core.error' | translate">
+                <ion-icon name="fas-exclamation-circle" slot="icon-only"></ion-icon>
+            </ion-button>
+            <ion-button *ngIf="navigation.length" [attr.aria-label]="'addon.mod_quiz.opentoc' | translate"
+                (click)="openNavigation()">
+                <ion-icon name="fas-bookmark" slot="icon-only"></ion-icon>
+            </ion-button>
+        </ion-buttons>
+    </ion-toolbar>
+</ion-header>
+<ion-content>
+    <!-- Navigation arrows and time left. -->
+    <ion-toolbar *ngIf="loaded && endTime && questions.length && !quizAborted && !showSummary" color="light" slot="fixed">
+        <ion-title>
+            <core-timer [endTime]="endTime" (finished)="timeUp()" [timerText]="'addon.mod_quiz.timeleft' | translate"
+                [align]="'center'">
+            </core-timer>
+        </ion-title>
+        <ion-buttons slot="end">
+            <ion-button *ngIf="previousPage >= 0" (click)="changePage(previousPage)" [title]="'core.previous' | translate">
+                <ion-icon name="fas-chevron-left" slot="icon-only"></ion-icon>
+            </ion-button>
+            <ion-button *ngIf="nextPage >= -1" (click)="changePage(nextPage)" [title]="'core.next' | translate">
+                <ion-icon name="fas-chevron-right" slot="icon-only"></ion-icon>
+            </ion-button>
+        </ion-buttons>
+    </ion-toolbar>
+
+    <core-loading [hideUntil]="loaded">
+        <!-- Navigation arrows if there's no timer. -->
+        <ion-toolbar *ngIf="!endTime && questions.length && !quizAborted && !showSummary" color="light">
+            <ion-buttons slot="end">
+                <ion-button *ngIf="previousPage >= 0" (click)="changePage(previousPage)" [title]="'core.previous' | translate">
+                    <ion-icon name="fas-chevron-left" slot="icon-only"></ion-icon>
+                </ion-button>
+                <ion-button *ngIf="nextPage >= -1" (click)="changePage(nextPage)" [title]="'core.next' | translate">
+                    <ion-icon name="fas-chevron-right" slot="icon-only"></ion-icon>
+                </ion-button>
+            </ion-buttons>
+        </ion-toolbar>
+
+        <!-- Button to start attempting. -->
+        <ion-button *ngIf="!attempt" expand="block" class="ion-margin" (click)="start()">
+            {{ 'addon.mod_quiz.startattempt' | translate }}
+        </ion-button>
+
+        <!-- Questions -->
+        <form name="addon-mod_quiz-player-form" *ngIf="questions.length && !quizAborted && !showSummary" #quizForm>
+            <div *ngFor="let question of questions">
+                <ion-card id="addon-mod_quiz-question-{{question.slot}}">
+                    <!-- "Header" of the question. -->
+                    <ion-item-divider>
+                        <ion-label>
+                            <h2 *ngIf="question.number" class="inline">
+                                {{ 'core.question.questionno' | translate:{$a: question.number} }}
+                            </h2>
+                            <h2 *ngIf="!question.number" class="inline">{{ 'core.question.information' | translate }}</h2>
+                        </ion-label>
+                        <div *ngIf="question.status || question.readableMark" slot="end"
+                            class="ion-text-wrap ion-margin-horizontal addon-mod_quiz-question-note">
+                            <p *ngIf="question.status" class="block">{{question.status}}</p>
+                            <p *ngIf="question.readableMark">{{ question.readableMark }}</p>
+                        </div>
+                    </ion-item-divider>
+
+                    <!-- Body of the question. -->
+                    <core-question class="ion-text-wrap" [question]="question" [component]="component"
+                        [componentId]="cmId" [attemptId]="attempt!.id" [usageId]="attempt!.uniqueid"
+                        [offlineEnabled]="offline" contextLevel="module" [contextInstanceId]="cmId"
+                        [courseId]="courseId" [preferredBehaviour]="quiz!.preferredbehaviour" [review]="false"
+                        (onAbort)="abortQuiz()" (buttonClicked)="behaviourButtonClicked($event)">
+                    </core-question>
+                </ion-card>
+            </div>
+        </form>
+
+        <!-- Go to next or previous page. -->
+        <ion-grid class="ion-text-wrap" *ngIf="questions.length && !quizAborted && !showSummary">
+            <ion-row>
+                <ion-col *ngIf="previousPage >= 0" >
+                    <ion-button expand="block" color="light" (click)="changePage(previousPage)">
+                        <ion-icon name="fas-chevron-left" slot="start"></ion-icon>
+                        {{ 'core.previous' | translate }}
+                    </ion-button>
+                </ion-col>
+                <ion-col *ngIf="nextPage >= -1">
+                    <ion-button expand="block" (click)="changePage(nextPage)">
+                        {{ 'core.next' | translate }}
+                        <ion-icon name="fas-chevron-right" slot="end"></ion-icon>
+                    </ion-button>
+                </ion-col>
+            </ion-row>
+        </ion-grid>
+
+        <!-- Summary -->
+        <ion-card *ngIf="!quizAborted && showSummary && summaryQuestions.length" class="addon-mod_quiz-table">
+            <ion-card-header class="ion-text-wrap">
+                <ion-card-title>{{ 'addon.mod_quiz.summaryofattempt' | translate }}</ion-card-title>
+            </ion-card-header>
+
+            <!-- "Header" of the summary table. -->
+            <ion-item class="ion-text-wrap">
+                <ion-label>
+                    <ion-row class="ion-align-items-center">
+                        <ion-col size="3" class="ion-text-center ion-hide-md-down">
+                            <strong>{{ 'addon.mod_quiz.question' | translate }}</strong>
+                        </ion-col>
+                        <ion-col size="3" class="ion-text-center ion-hide-md-up"><strong>#</strong></ion-col>
+                        <ion-col size="9" class="ion-text-center">
+                            <strong>{{ 'addon.mod_quiz.status' | translate }}</strong>
+                        </ion-col>
+                    </ion-row>
+                </ion-label>
+            </ion-item>
+
+            <!-- List of questions of the summary table. -->
+            <ng-container *ngFor="let question of summaryQuestions">
+                <ion-item *ngIf="question.number" (click)="changePage(question.page, false, question.slot)"
+                    [attr.aria-label]="'core.question.questionno' | translate:{$a: question.number}"
+                    [detail]="!isSequential && canReturn" [attr.button]="!isSequential && canReturn ? true : null">
+                    <ion-label>
+                        <ion-row class="ion-align-items-center">
+                            <ion-col size="3" class="ion-text-center">{{ question.number }}</ion-col>
+                            <ion-col size="9" class="ion-text-center ion-text-wrap">{{ question.status }}</ion-col>
+                        </ion-row>
+                    </ion-label>
+                </ion-item>
+            </ng-container>
+
+            <!-- Button to return to last page seen. -->
+            <ion-button *ngIf="canReturn" expand="block" class="ion-margin" (click)="changePage(attempt!.currentpage!)">
+                {{ 'addon.mod_quiz.returnattempt' | translate }}
+            </ion-button>
+
+            <!-- Due date warning. -->
+            <ion-item class="ion-text-wrap" *ngIf="dueDateWarning">
+                <ion-label>{{ dueDateWarning }}</ion-label>
+            </ion-item>
+
+            <!-- Time left (if quiz is timed). -->
+            <core-timer *ngIf="endTime" [endTime]="endTime" (finished)="timeUp()"
+                [timerText]="'addon.mod_quiz.timeleft' | translate">
+            </core-timer>
+
+            <!-- List of messages explaining why the quiz cannot be submitted. -->
+            <ion-item class="ion-text-wrap" *ngIf="preventSubmitMessages.length">
+                <ion-label>
+                    <h3 class="item-heading">{{ 'addon.mod_quiz.cannotsubmitquizdueto' | translate }}</h3>
+                    <p *ngFor="let message of preventSubmitMessages">{{message}}</p>
+                </ion-label>
+            </ion-item>
+
+            <ion-button *ngIf="preventSubmitMessages.length" expand="block" [href]="moduleUrl" core-link>
+                {{ 'core.openinbrowser' | translate }}
+                <ion-icon name="fas-external-link-alt" slot="end"></ion-icon>
+            </ion-button>
+
+            <!-- Button to submit the quiz. -->
+            <ion-button *ngIf="!attempt!.finishedOffline && !preventSubmitMessages.length" expand="block"
+                class="ion-margin" (click)="finishAttempt(true)">
+                {{ 'addon.mod_quiz.submitallandfinish' | translate }}
+            </ion-button>
+        </ion-card>
+
+        <!-- Quiz aborted -->
+        <ion-card *ngIf="attempt && ((!questions.length && !showSummary) || quizAborted)">
+            <ion-item class="ion-text-wrap">
+                <ion-label>{{ 'addon.mod_quiz.errorparsequestions' | translate }}</ion-label>
+            </ion-item>
+            <ion-button expand="block" class="ion-margin" [href]="moduleUrl" core-link>
+                {{ 'core.openinbrowser' | translate }}
+                <ion-icon name="fas-external-link-alt" slot="end"></ion-icon>
+            </ion-button>
+        </ion-card>
+    </core-loading>
+</ion-content>

src/addons/mod/quiz/pages/player/player.module.ts

@@ -0,0 +1,42 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { NgModule } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+import { CoreQuestionComponentsModule } from '@features/question/components/components.module';
+import { CanLeaveGuard } from '@guards/can-leave';
+import { AddonModQuizPlayerPage } from './player';
+
+const routes: Routes = [
+    {
+        path: '',
+        component: AddonModQuizPlayerPage,
+        canDeactivate: [CanLeaveGuard],
+    },
+];
+
+@NgModule({
+    imports: [
+        RouterModule.forChild(routes),
+        CoreSharedModule,
+        CoreQuestionComponentsModule,
+    ],
+    declarations: [
+        AddonModQuizPlayerPage,
+    ],
+    exports: [RouterModule],
+})
+export class AddonModQuizPlayerPageModule {}

src/addons/mod/quiz/pages/player/player.scss

@@ -0,0 +1,10 @@
+:host {
+    .addon-mod_quiz-question-note p {
+        margin-top: 2px;
+        margin-bottom: 2px;
+    }
+
+    ion-toolbar {
+        border-bottom: 1px solid var(--gray);
+    }
+}

src/addons/mod/quiz/pages/player/player.ts

@@ -0,0 +1,785 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, OnInit, OnDestroy, ViewChild, ChangeDetectorRef, ViewChildren, QueryList, ElementRef } from '@angular/core';
+import { IonContent } from '@ionic/angular';
+import { Subscription } from 'rxjs';
+
+import { CoreIonLoadingElement } from '@classes/ion-loading';
+import { CoreQuestionComponent } from '@features/question/components/question/question';
+import { CoreQuestionQuestionParsed, CoreQuestionsAnswers } from '@features/question/services/question';
+import { CoreQuestionBehaviourButton, CoreQuestionHelper } from '@features/question/services/question-helper';
+import { CoreNavigator } from '@services/navigator';
+import { CoreSites, CoreSitesReadingStrategy } from '@services/sites';
+import { CoreSync } from '@services/sync';
+import { CoreDomUtils } from '@services/utils/dom';
+import { CoreTimeUtils } from '@services/utils/time';
+import { CoreUtils } from '@services/utils/utils';
+import { ModalController, Translate } from '@singletons';
+import { CoreEventActivityDataSentData, CoreEvents } from '@singletons/events';
+import { AddonModQuizAutoSave } from '../../classes/auto-save';
+import {
+    AddonModQuizNavigationModalComponent,
+    AddonModQuizNavigationQuestion,
+} from '../../components/navigation-modal/navigation-modal';
+import {
+    AddonModQuiz,
+    AddonModQuizAttemptFinishedData,
+    AddonModQuizAttemptWSData,
+    AddonModQuizGetAttemptAccessInformationWSResponse,
+    AddonModQuizGetQuizAccessInformationWSResponse,
+    AddonModQuizProvider,
+    AddonModQuizQuizWSData,
+} from '../../services/quiz';
+import { AddonModQuizAttempt, AddonModQuizHelper } from '../../services/quiz-helper';
+import { AddonModQuizSync } from '../../services/quiz-sync';
+
+/**
+ * Page that allows attempting a quiz.
+ */
+@Component({
+    selector: 'page-addon-mod-quiz-player',
+    templateUrl: 'player.html',
+    styleUrls: ['player.scss'],
+})
+export class AddonModQuizPlayerPage implements OnInit, OnDestroy {
+
+    @ViewChild(IonContent) content?: IonContent;
+    @ViewChildren(CoreQuestionComponent) questionComponents?: QueryList<CoreQuestionComponent>;
+    @ViewChild('quizForm') formElement?: ElementRef;
+
+    quiz?: AddonModQuizQuizWSData; // The quiz the attempt belongs to.
+    attempt?: AddonModQuizAttempt; // The attempt being attempted.
+    moduleUrl?: string; // URL to the module in the site.
+    component = AddonModQuizProvider.COMPONENT; // Component to link the files to.
+    loaded = false; // Whether data has been loaded.
+    quizAborted = false; // Whether the quiz was aborted due to an error.
+    offline = false; // Whether the quiz is being attempted in offline mode.
+    navigation: AddonModQuizNavigationQuestion[] = []; // List of questions to navigate them.
+    questions: QuizQuestion[] = []; // Questions of the current page.
+    nextPage = -2; // Next page.
+    previousPage = -1; // Previous page.
+    showSummary = false; // Whether the attempt summary should be displayed.
+    summaryQuestions: CoreQuestionQuestionParsed[] = []; // The questions to display in the summary.
+    canReturn = false; // Whether the user can return to a page after seeing the summary.
+    preventSubmitMessages: string[] = []; // List of messages explaining why the quiz cannot be submitted.
+    endTime?: number; // The time when the attempt must be finished.
+    autoSaveError = false; // Whether there's been an error in auto-save.
+    isSequential = false; // Whether quiz navigation is sequential.
+    readableTimeLimit?: string; // Time limit in a readable format.
+    dueDateWarning?: string; // Warning about due date.
+    courseId!: number; // The course ID the quiz belongs to.
+    cmId!: number; // Course module ID.
+
+    protected preflightData: Record<string, string> = {}; // Preflight data to attempt the quiz.
+    protected quizAccessInfo?: AddonModQuizGetQuizAccessInformationWSResponse; // Quiz access information.
+    protected attemptAccessInfo?: AddonModQuizGetAttemptAccessInformationWSResponse; // Attempt access info.
+    protected lastAttempt?: AddonModQuizAttemptWSData; // Last user attempt before a new one is created (if needed).
+    protected newAttempt = false; // Whether the user is starting a new attempt.
+    protected quizDataLoaded = false; // Whether the quiz data has been loaded.
+    protected timeUpCalled = false; // Whether the time up function has been called.
+    protected autoSave!: AddonModQuizAutoSave; // Class to auto-save answers every certain time.
+    protected autoSaveErrorSubscription?: Subscription; // To be notified when an error happens in auto-save.
+    protected forceLeave = false; // If true, don't perform any check when leaving the view.
+    protected reloadNavigation = false; // Whether navigation needs to be reloaded because some data was sent to server.
+
+    constructor(
+        protected changeDetector: ChangeDetectorRef,
+        protected elementRef: ElementRef,
+    ) {
+    }
+
+    /**
+     * Component being initialized.
+     */
+    ngOnInit(): void {
+        this.cmId = CoreNavigator.instance.getRouteNumberParam('cmId')!;
+        this.courseId = CoreNavigator.instance.getRouteNumberParam('courseId')!;
+        this.moduleUrl = CoreNavigator.instance.getRouteParam('moduleUrl');
+
+        // Create the auto save instance.
+        this.autoSave = new AddonModQuizAutoSave(
+            'addon-mod_quiz-player-form',
+            '#addon-mod_quiz-connection-error-button',
+        );
+
+        // Start the player when the page is loaded.
+        this.start();
+
+        // Listen for errors on auto-save.
+        this.autoSaveErrorSubscription = this.autoSave.onError().subscribe((error) => {
+            this.autoSaveError = error;
+            this.changeDetector.detectChanges();
+        });
+    }
+
+    /**
+     * Component being destroyed.
+     */
+    ngOnDestroy(): void {
+        // Stop auto save.
+        this.autoSave.cancelAutoSave();
+        this.autoSave.stopCheckChangesProcess();
+        this.autoSaveErrorSubscription?.unsubscribe();
+
+        if (this.quiz) {
+            // Unblock the quiz so it can be synced.
+            CoreSync.instance.unblockOperation(AddonModQuizProvider.COMPONENT, this.quiz.id);
+        }
+    }
+
+    /**
+     * Check if we can leave the page or not.
+     *
+     * @return Resolved if we can leave it, rejected if not.
+     */
+    async ionViewCanLeave(): Promise<void> {
+        if (this.forceLeave || this.quizAborted || !this.questions.length || this.showSummary) {
+            return;
+        }
+
+        // Save answers.
+        const modal = await CoreDomUtils.instance.showModalLoading('core.sending', true);
+
+        try {
+            await this.processAttempt(false, false);
+        } catch (error) {
+            // Save attempt failed. Show confirmation.
+            modal.dismiss();
+
+            await CoreDomUtils.instance.showConfirm(Translate.instance.instant('addon.mod_quiz.confirmleavequizonerror'));
+
+            CoreDomUtils.instance.triggerFormCancelledEvent(this.formElement, CoreSites.instance.getCurrentSiteId());
+        } finally {
+            modal.dismiss();
+        }
+    }
+
+    /**
+     * Runs when the page is about to leave and no longer be the active page.
+     */
+    async ionViewWillLeave(): Promise<void> {
+        // Close any modal if present.
+        const modal = await ModalController.instance.getTop();
+
+        modal?.dismiss();
+    }
+
+    /**
+     * Abort the quiz.
+     */
+    abortQuiz(): void {
+        this.quizAborted = true;
+    }
+
+    /**
+     * A behaviour button in a question was clicked (Check, Redo, ...).
+     *
+     * @param button Clicked button.
+     */
+    async behaviourButtonClicked(button: CoreQuestionBehaviourButton): Promise<void> {
+        let modal: CoreIonLoadingElement | undefined;
+
+        try {
+            // Confirm that the user really wants to do it.
+            await CoreDomUtils.instance.showConfirm(Translate.instance.instant('core.areyousure'));
+
+            modal = await CoreDomUtils.instance.showModalLoading('core.sending', true);
+
+            // Get the answers.
+            const answers = await this.prepareAnswers();
+
+            // Add the clicked button data.
+            answers[button.name] = button.value;
+
+            // Behaviour checks are always in online.
+            await AddonModQuiz.instance.processAttempt(this.quiz!, this.attempt!, answers, this.preflightData);
+
+            this.reloadNavigation = true; // Data sent to server, navigation should be reloaded.
+
+            // Reload the current page.
+            const scrollElement = await this.content?.getScrollElement();
+            const scrollTop = scrollElement?.scrollTop || -1;
+            const scrollLeft = scrollElement?.scrollLeft || -1;
+
+            this.loaded = false;
+            this.content?.scrollToTop(); // Scroll top so the spinner is seen.
+
+            try {
+                await this.loadPage(this.attempt!.currentpage!);
+            } finally {
+                this.loaded = true;
+                if (scrollTop != -1 && scrollLeft != -1) {
+                    this.content?.scrollToPoint(scrollLeft, scrollTop);
+                }
+            }
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'Error performing action.');
+        } finally {
+            modal?.dismiss();
+        }
+    }
+
+    /**
+     * Change the current page. If slot is supplied, try to scroll to that question.
+     *
+     * @param page Page to load. -1 means summary.
+     * @param fromModal Whether the page was selected using the navigation modal.
+     * @param slot Slot of the question to scroll to.
+     * @return Promise resolved when done.
+     */
+    async changePage(page: number, fromModal?: boolean, slot?: number): Promise<void> {
+        if (!this.attempt) {
+            return;
+        }
+
+        if (page != -1 && (this.attempt.state == AddonModQuizProvider.ATTEMPT_OVERDUE || this.attempt.finishedOffline)) {
+            // We can't load a page if overdue or the local attempt is finished.
+            return;
+        } else if (page == this.attempt.currentpage && !this.showSummary && typeof slot != 'undefined') {
+            // Navigating to a question in the current page.
+            this.scrollToQuestion(slot);
+
+            return;
+        } else if ((page == this.attempt.currentpage && !this.showSummary) || (fromModal && this.isSequential && page != -1)) {
+            // If the user is navigating to the current page we do nothing.
+            // Also, in sequential quizzes we don't allow navigating using the modal except for finishing the quiz (summary).
+            return;
+        } else if (page === -1 && this.showSummary) {
+            // Summary already shown.
+            return;
+        }
+
+        this.content?.scrollToTop();
+
+        // First try to save the attempt data. We only save it if we're not seeing the summary.
+        if (!this.showSummary) {
+            const modal = await CoreDomUtils.instance.showModalLoading('core.sending', true);
+
+            try {
+                await this.processAttempt(false, false);
+
+                modal.dismiss();
+            } catch (error) {
+                CoreDomUtils.instance.showErrorModalDefault(error, 'addon.mod_quiz.errorsaveattempt', true);
+                modal.dismiss();
+
+                return;
+            }
+
+            this.reloadNavigation = true; // Data sent to server, navigation should be reloaded.
+        }
+
+        this.loaded = false;
+
+        try {
+            // Attempt data successfully saved, load the page or summary.
+            // Stop checking for changes during page change.
+            this.autoSave.stopCheckChangesProcess();
+
+            if (page === -1) {
+                await this.loadSummary();
+            } else {
+                await this.loadPage(page);
+            }
+        } catch (error) {
+            // If the user isn't seeing the summary, start the check again.
+            if (!this.showSummary) {
+                this.autoSave.startCheckChangesProcess(this.quiz!, this.attempt, this.preflightData, this.offline);
+            }
+
+            CoreDomUtils.instance.showErrorModalDefault(error, 'addon.mod_quiz.errorgetquestions', true);
+        } finally {
+            this.loaded = true;
+
+            if (typeof slot != 'undefined') {
+                // Scroll to the question. Give some time to the questions to render.
+                setTimeout(() => {
+                    this.scrollToQuestion(slot);
+                }, 2000);
+            }
+        }
+    }
+
+    /**
+     * Convenience function to get the quiz data.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async fetchData(): Promise<void> {
+        try {
+            this.quiz = await AddonModQuiz.instance.getQuiz(this.courseId, this.cmId);
+
+            // Block the quiz so it cannot be synced.
+            CoreSync.instance.blockOperation(AddonModQuizProvider.COMPONENT, this.quiz.id);
+
+            // Wait for any ongoing sync to finish. We won't sync a quiz while it's being played.
+            await AddonModQuizSync.instance.waitForSync(this.quiz.id);
+
+            this.isSequential = AddonModQuiz.instance.isNavigationSequential(this.quiz);
+
+            if (AddonModQuiz.instance.isQuizOffline(this.quiz)) {
+                // Quiz supports offline.
+                this.offline = true;
+            } else {
+                // Quiz doesn't support offline right now, but maybe it did and then the setting was changed.
+                // If we have an unfinished offline attempt then we'll use offline mode.
+                this.offline = await AddonModQuiz.instance.isLastAttemptOfflineUnfinished(this.quiz);
+            }
+
+            if (this.quiz!.timelimit && this.quiz!.timelimit > 0) {
+                this.readableTimeLimit = CoreTimeUtils.instance.formatTime(this.quiz.timelimit);
+            }
+
+            // Get access information for the quiz.
+            this.quizAccessInfo = await AddonModQuiz.instance.getQuizAccessInformation(this.quiz.id, {
+                cmId: this.quiz.coursemodule,
+                readingStrategy: this.offline ? CoreSitesReadingStrategy.PreferCache : CoreSitesReadingStrategy.OnlyNetwork,
+            });
+
+            // Get user attempts to determine last attempt.
+            const attempts = await AddonModQuiz.instance.getUserAttempts(this.quiz.id, {
+                cmId: this.quiz.coursemodule,
+                readingStrategy: this.offline ? CoreSitesReadingStrategy.PreferCache : CoreSitesReadingStrategy.OnlyNetwork,
+            });
+
+            if (!attempts.length) {
+                // There are no attempts, start a new one.
+                this.newAttempt = true;
+
+                return;
+            }
+
+            // Get the last attempt. If it's finished, start a new one.
+            this.lastAttempt = await AddonModQuizHelper.instance.setAttemptCalculatedData(
+                this.quiz,
+                attempts[attempts.length - 1],
+                false,
+                undefined,
+                true,
+            );
+
+            this.newAttempt = AddonModQuiz.instance.isAttemptFinished(this.lastAttempt.state);
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'addon.mod_quiz.errorgetquiz', true);
+        }
+    }
+
+    /**
+     * Finish an attempt, either by timeup or because the user clicked to finish it.
+     *
+     * @param userFinish Whether the user clicked to finish the attempt.
+     * @param timeUp Whether the quiz time is up.
+     * @return Promise resolved when done.
+     */
+    async finishAttempt(userFinish?: boolean, timeUp?: boolean): Promise<void> {
+        let modal: CoreIonLoadingElement | undefined;
+
+        try {
+            // Show confirm if the user clicked the finish button and the quiz is in progress.
+            if (!timeUp && this.attempt!.state == AddonModQuizProvider.ATTEMPT_IN_PROGRESS) {
+                await CoreDomUtils.instance.showConfirm(Translate.instance.instant('addon.mod_quiz.confirmclose'));
+            }
+
+            modal = await CoreDomUtils.instance.showModalLoading('core.sending', true);
+
+            await this.processAttempt(userFinish, timeUp);
+
+            // Trigger an event to notify the attempt was finished.
+            CoreEvents.trigger<AddonModQuizAttemptFinishedData>(AddonModQuizProvider.ATTEMPT_FINISHED_EVENT, {
+                quizId: this.quiz!.id,
+                attemptId: this.attempt!.id,
+                synced: !this.offline,
+            }, CoreSites.instance.getCurrentSiteId());
+
+            CoreEvents.trigger<CoreEventActivityDataSentData>(CoreEvents.ACTIVITY_DATA_SENT, { module: 'quiz' });
+
+            // Leave the player.
+            this.forceLeave = true;
+            CoreNavigator.instance.back();
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'addon.mod_quiz.errorsaveattempt', true);
+        } finally {
+            modal?.dismiss();
+        }
+    }
+
+    /**
+     * Fix sequence checks of current page.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async fixSequenceChecks(): Promise<void> {
+        // Get current page data again to get the latest sequencechecks.
+        const data = await AddonModQuiz.instance.getAttemptData(this.attempt!.id, this.attempt!.currentpage!, this.preflightData, {
+            cmId: this.quiz!.coursemodule,
+            readingStrategy: this.offline ? CoreSitesReadingStrategy.PreferCache : CoreSitesReadingStrategy.OnlyNetwork,
+        });
+
+        const newSequenceChecks: Record<number, { name: string; value: string }> = {};
+
+        data.questions.forEach((question) => {
+            const sequenceCheck = CoreQuestionHelper.instance.getQuestionSequenceCheckFromHtml(question.html);
+            if (sequenceCheck) {
+                newSequenceChecks[question.slot] = sequenceCheck;
+            }
+        });
+
+        // Notify the new sequence checks to the components.
+        this.questionComponents?.forEach((component) => {
+            component.updateSequenceCheck(newSequenceChecks);
+        });
+    }
+
+    /**
+     * Get the input answers.
+     *
+     * @return Object with the answers.
+     */
+    protected getAnswers(): CoreQuestionsAnswers {
+        return CoreQuestionHelper.instance.getAnswersFromForm(document.forms['addon-mod_quiz-player-form']);
+    }
+
+    /**
+     * Initializes the timer if enabled.
+     */
+    protected initTimer(): void {
+        if (!this.attemptAccessInfo?.endtime || this.attemptAccessInfo.endtime < 0) {
+            return;
+        }
+
+        // Quiz has an end time. Check if time left should be shown.
+        const shouldShowTime = AddonModQuiz.instance.shouldShowTimeLeft(
+            this.quizAccessInfo!.activerulenames,
+            this.attempt!,
+            this.attemptAccessInfo.endtime,
+        );
+
+        if (shouldShowTime) {
+            this.endTime = this.attemptAccessInfo.endtime;
+        } else {
+            delete this.endTime;
+        }
+    }
+
+    /**
+     * Load a page questions.
+     *
+     * @param page The page to load.
+     * @return Promise resolved when done.
+     */
+    protected async loadPage(page: number): Promise<void> {
+        const data = await AddonModQuiz.instance.getAttemptData(this.attempt!.id, page, this.preflightData, {
+            cmId: this.quiz!.coursemodule,
+            readingStrategy: this.offline ? CoreSitesReadingStrategy.PreferCache : CoreSitesReadingStrategy.OnlyNetwork,
+        });
+
+        // Update attempt, status could change during the execution.
+        this.attempt = data.attempt;
+        this.attempt.currentpage = page;
+
+        this.questions = data.questions;
+        this.nextPage = data.nextpage;
+        this.previousPage = this.isSequential ? -1 : page - 1;
+        this.showSummary = false;
+
+        this.questions.forEach((question) => {
+            // Get the readable mark for each question.
+            question.readableMark = AddonModQuizHelper.instance.getQuestionMarkFromHtml(question.html);
+
+            // Extract the question info box.
+            CoreQuestionHelper.instance.extractQuestionInfoBox(question, '.info');
+
+            // Check if the question is blocked. If it is, treat it as a description question.
+            if (AddonModQuiz.instance.isQuestionBlocked(question)) {
+                question.type = 'description';
+            }
+        });
+
+        // Mark the page as viewed.
+        CoreUtils.instance.ignoreErrors(
+            AddonModQuiz.instance.logViewAttempt(this.attempt.id, page, this.preflightData, this.offline, this.quiz),
+        );
+
+        // Start looking for changes.
+        this.autoSave.startCheckChangesProcess(this.quiz!, this.attempt, this.preflightData, this.offline);
+    }
+
+    /**
+     * Load attempt summary.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async loadSummary(): Promise<void> {
+        this.summaryQuestions = [];
+
+        this.summaryQuestions = await AddonModQuiz.instance.getAttemptSummary(this.attempt!.id, this.preflightData, {
+            cmId: this.quiz!.coursemodule,
+            loadLocal: this.offline,
+            readingStrategy: this.offline ? CoreSitesReadingStrategy.PreferCache : CoreSitesReadingStrategy.OnlyNetwork,
+        });
+
+        this.showSummary = true;
+        this.canReturn = this.attempt!.state == AddonModQuizProvider.ATTEMPT_IN_PROGRESS && !this.attempt!.finishedOffline;
+        this.preventSubmitMessages = AddonModQuiz.instance.getPreventSubmitMessages(this.summaryQuestions);
+
+        this.dueDateWarning = AddonModQuiz.instance.getAttemptDueDateWarning(this.quiz!, this.attempt!);
+
+        // Log summary as viewed.
+        CoreUtils.instance.ignoreErrors(
+            AddonModQuiz.instance.logViewAttemptSummary(this.attempt!.id, this.preflightData, this.quiz!.id, this.quiz!.name),
+        );
+    }
+
+    /**
+     * Load data to navigate the questions using the navigation modal.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async loadNavigation(): Promise<void> {
+        // We use the attempt summary to build the navigation because it contains all the questions.
+        this.navigation = await AddonModQuiz.instance.getAttemptSummary(this.attempt!.id, this.preflightData, {
+            cmId: this.quiz!.coursemodule,
+            loadLocal: this.offline,
+            readingStrategy: this.offline ? CoreSitesReadingStrategy.PreferCache : CoreSitesReadingStrategy.OnlyNetwork,
+        });
+
+        this.navigation.forEach((question) => {
+            question.stateClass = CoreQuestionHelper.instance.getQuestionStateClass(question.state || '');
+        });
+    }
+
+    /**
+     * Open the navigation modal.
+     *
+     * @return Promise resolved when done.
+     */
+    async openNavigation(): Promise<void> {
+
+        if (this.reloadNavigation) {
+            // Some data has changed, reload the navigation.
+            const modal = await CoreDomUtils.instance.showModalLoading();
+
+            await CoreUtils.instance.ignoreErrors(this.loadNavigation());
+
+            modal.dismiss();
+            this.reloadNavigation = false;
+        }
+
+        // Create the navigation modal.
+        const modal = await ModalController.instance.create({
+            component: AddonModQuizNavigationModalComponent,
+            componentProps: {
+                navigation: this.navigation,
+                summaryShown: this.showSummary,
+                currentPage: this.attempt?.currentpage,
+                isReview: false,
+            },
+            cssClass: 'core-modal-lateral',
+            showBackdrop: true,
+            backdropDismiss: true,
+            // @todo enterAnimation: 'core-modal-lateral-transition',
+            // @todo leaveAnimation: 'core-modal-lateral-transition',
+        });
+
+        await modal.present();
+
+        const result = await modal.onWillDismiss();
+
+        if (result.data && result.data.action == AddonModQuizNavigationModalComponent.CHANGE_PAGE) {
+            this.changePage(result.data.page, true, result.data.slot);
+        }
+    }
+
+    /**
+     * Prepare the answers to be sent for the attempt.
+     *
+     * @return Promise resolved with the answers.
+     */
+    protected prepareAnswers(): Promise<CoreQuestionsAnswers> {
+        return CoreQuestionHelper.instance.prepareAnswers(
+            this.questions,
+            this.getAnswers(),
+            this.offline,
+            this.component,
+            this.quiz!.coursemodule,
+        );
+    }
+
+    /**
+     * Process attempt.
+     *
+     * @param userFinish Whether the user clicked to finish the attempt.
+     * @param timeUp Whether the quiz time is up.
+     * @param retrying Whether we're retrying the change.
+     * @return Promise resolved when done.
+     */
+    protected async processAttempt(userFinish?: boolean, timeUp?: boolean, retrying?: boolean): Promise<void> {
+        // Get the answers to send.
+        let answers: CoreQuestionsAnswers = {};
+
+        if (!this.showSummary) {
+            answers = await this.prepareAnswers();
+        }
+
+        try {
+            // Send the answers.
+            await AddonModQuiz.instance.processAttempt(
+                this.quiz!,
+                this.attempt!,
+                answers,
+                this.preflightData,
+                userFinish,
+                timeUp,
+                this.offline,
+            );
+        } catch (error) {
+            if (!error || error.errorcode != 'submissionoutofsequencefriendlymessage') {
+                throw error;
+            }
+
+            try {
+                // There was an error with the sequence check. Try to ammend it.
+                await this.fixSequenceChecks();
+            } catch {
+                throw error;
+            }
+
+            if (retrying) {
+                // We're already retrying, don't send the data again because it could cause an infinite loop.
+                throw error;
+            }
+
+            // Sequence checks updated, try to send the data again.
+            return this.processAttempt(userFinish, timeUp, true);
+        }
+
+        // Answers saved, cancel auto save.
+        this.autoSave.cancelAutoSave();
+        this.autoSave.hideAutoSaveError();
+
+        if (this.formElement) {
+            CoreDomUtils.instance.triggerFormSubmittedEvent(this.formElement, !this.offline, CoreSites.instance.getCurrentSiteId());
+        }
+
+        return CoreQuestionHelper.instance.clearTmpData(this.questions, this.component, this.quiz!.coursemodule);
+    }
+
+    /**
+     * Scroll to a certain question.
+     *
+     * @param slot Slot of the question to scroll to.
+     */
+    protected scrollToQuestion(slot: number): void {
+        CoreDomUtils.instance.scrollToElementBySelector(
+            this.elementRef.nativeElement,
+            this.content,
+            '#addon-mod_quiz-question-' + slot,
+        );
+    }
+
+    /**
+     * Show connection error.
+     *
+     * @param ev Click event.
+     */
+    showConnectionError(ev: Event): void {
+        this.autoSave.showAutoSaveError(ev);
+    }
+
+    /**
+     * Convenience function to start the player.
+     */
+    async start(): Promise<void> {
+        try {
+            this.loaded = false;
+
+            if (!this.quizDataLoaded) {
+                // Fetch data.
+                await this.fetchData();
+
+                this.quizDataLoaded = true;
+            }
+
+            // Quiz data has been loaded, try to start or continue.
+            await this.startOrContinueAttempt();
+        } finally {
+            this.loaded = true;
+        }
+    }
+
+    /**
+     * Start or continue an attempt.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async startOrContinueAttempt(): Promise<void> {
+        try {
+            let attempt = this.newAttempt ? undefined : this.lastAttempt;
+
+            // Get the preflight data and start attempt if needed.
+            attempt = await AddonModQuizHelper.instance.getAndCheckPreflightData(
+                this.quiz!,
+                this.quizAccessInfo!,
+                this.preflightData,
+                attempt,
+                this.offline,
+                false,
+                'addon.mod_quiz.startattempt',
+            );
+
+            // Re-fetch attempt access information with the right attempt (might have changed because a new attempt was created).
+            this.attemptAccessInfo = await AddonModQuiz.instance.getAttemptAccessInformation(this.quiz!.id, attempt.id, {
+                cmId: this.quiz!.coursemodule,
+                readingStrategy: this.offline ? CoreSitesReadingStrategy.PreferCache : CoreSitesReadingStrategy.OnlyNetwork,
+            });
+
+            this.attempt = attempt;
+
+            await this.loadNavigation();
+
+            if (this.attempt.state != AddonModQuizProvider.ATTEMPT_OVERDUE && !this.attempt.finishedOffline) {
+                // Attempt not overdue and not finished in offline, load page.
+                await this.loadPage(this.attempt.currentpage!);
+
+                this.initTimer();
+            } else {
+                // Attempt is overdue or finished in offline, we can only load the summary.
+                await this.loadSummary();
+            }
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'addon.mod_quiz.errorgetquestions', true);
+        }
+    }
+
+    /**
+     * Quiz time has finished.
+     */
+    timeUp(): void {
+        if (this.timeUpCalled) {
+            return;
+        }
+
+        this.timeUpCalled = true;
+        this.finishAttempt(false, true);
+    }
+
+}
+
+/**
+ * Question with some calculated data for the view.
+ */
+type QuizQuestion = CoreQuestionQuestionParsed & {
+    readableMark?: string;
+};

src/addons/mod/quiz/pages/review/review.html

@@ -0,0 +1,137 @@
+<ion-header>
+    <ion-toolbar>
+        <ion-buttons slot="start">
+            <ion-back-button [attr.aria-label]="'core.back' | translate"></ion-back-button>
+        </ion-buttons>
+        <ion-title>{{ 'addon.mod_quiz.review' | translate }}</ion-title>
+
+        <ion-buttons slot="end">
+            <ion-button *ngIf="navigation.length" [attr.aria-label]="'addon.mod_quiz.opentoc' | translate"
+                (click)="openNavigation()">
+                <ion-icon name="fas-bookmark" slot="icon-only"></ion-icon>
+            </ion-button>
+        </ion-buttons>
+    </ion-toolbar>
+</ion-header>
+<ion-content>
+    <ion-refresher slot="fixed" [disabled]="!loaded" (ionRefresh)="refreshData($event.target)">
+        <ion-refresher-content pullingText="{{ 'core.pulltorefresh' | translate }}"></ion-refresher-content>
+    </ion-refresher>
+    <core-loading [hideUntil]="loaded">
+
+        <!-- Review summary -->
+        <ion-card *ngIf="attempt">
+            <ion-card-header class="ion-text-wrap">
+                <ion-card-title>
+                    <span *ngIf="attempt.preview">{{ 'addon.mod_quiz.reviewofpreview' | translate }}</span>
+                    <span *ngIf="!attempt.preview">{{ 'addon.mod_quiz.reviewofattempt' | translate:{$a: attempt.attempt} }}</span>
+                </ion-card-title>
+            </ion-card-header>
+            <ion-list lines="none">
+                <ion-item class="ion-text-wrap">
+                    <ion-label>
+                        <h2>{{ 'addon.mod_quiz.startedon' | translate }}</h2>
+                        <p>{{ attempt.timestart! * 1000 | coreFormatDate }}</p>
+                    </ion-label>
+                </ion-item>
+                <ion-item class="ion-text-wrap">
+                    <ion-label>
+                        <h2>{{ 'addon.mod_quiz.attemptstate' | translate }}</h2>
+                        <p>{{ readableState }}</p>
+                    </ion-label>
+                </ion-item>
+                <ion-item class="ion-text-wrap" *ngIf="showCompleted">
+                    <ion-label>
+                        <h2>{{ 'addon.mod_quiz.completedon' | translate }}</h2>
+                        <p>{{ attempt.timefinish! * 1000 | coreFormatDate }}</p>
+                    </ion-label>
+                </ion-item>
+                <ion-item class="ion-text-wrap" *ngIf="timeTaken">
+                    <ion-label>
+                        <h2>{{ 'addon.mod_quiz.timetaken' | translate }}</h2>
+                        <p>{{ timeTaken }}</p>
+                    </ion-label>
+                </ion-item>
+                <ion-item class="ion-text-wrap" *ngIf="overTime">
+                    <ion-label>
+                        <h2>{{ 'addon.mod_quiz.overdue' | translate }}</h2>
+                        <p>{{ overTime }}</p>
+                    </ion-label>
+                </ion-item>
+                <ion-item class="ion-text-wrap" *ngIf="readableMark">
+                    <ion-label>
+                        <h2>{{ 'addon.mod_quiz.marks' | translate }}</h2>
+                        <p>{{ readableMark }}</p>
+                    </ion-label>
+                </ion-item>
+                <ion-item class="ion-text-wrap" *ngIf="readableGrade">
+                    <ion-label>
+                        <h2>{{ 'addon.mod_quiz.grade' | translate }}</h2>
+                        <p>{{ readableGrade }}</p>
+                    </ion-label>
+                </ion-item>
+                <ion-item class="ion-text-wrap" *ngFor="let data of additionalData">
+                    <ion-label>
+                        <h2>{{ data.title }}</h2>
+                        <core-format-text [component]="component" [componentId]="cmId" [text]="data.content"
+                            contextLevel="module" [contextInstanceId]="cmId" [courseId]="courseId">
+                        </core-format-text>
+                    </ion-label>
+                </ion-item>
+            </ion-list>
+        </ion-card>
+
+        <!-- Questions -->
+        <div *ngIf="attempt && questions.length">
+            <!-- Arrows to go to next/previous. -->
+            <ng-container *ngTemplateOutlet="navArrows"></ng-container>
+
+            <!-- Questions. -->
+            <div *ngFor="let question of questions">
+                <ion-card id="addon-mod_quiz-question-{{question.slot}}">
+                    <!-- "Header" of the question. -->
+                    <ion-item-divider>
+                        <ion-label>
+                            <h2 *ngIf="question.number">{{ 'core.question.questionno' | translate:{$a: question.number} }}</h2>
+                            <h2 *ngIf="!question.number">{{ 'core.question.information' | translate }}</h2>
+                        </ion-label>
+                        <div class="ion-text-wrap ion-margin-horizontal addon-mod_quiz-question-note" slot="end"
+                            *ngIf="question.status || question.readableMark">
+                            <p *ngIf="question.status">{{question.status}}</p>
+                            <p *ngIf="question.readableMark">{{question.readableMark}}</p>
+                        </div>
+                    </ion-item-divider>
+
+                    <!-- Body of the question. -->
+                    <core-question class="ion-text-wrap" [question]="question" [component]="component" [componentId]="cmId"
+                        [attemptId]="attempt.id" [usageId]="attempt.uniqueid" [offlineEnabled]="false" contextLevel="module"
+                        [contextInstanceId]="cmId" [courseId]="courseId" [review]="true"
+                        [preferredBehaviour]="quiz?.preferredbehaviour">
+                    </core-question>
+                </ion-card>
+            </div>
+
+            <!-- Arrows to go to next/previous. -->
+            <ng-container *ngTemplateOutlet="navArrows"></ng-container>
+        </div>
+    </core-loading>
+</ion-content>
+
+<!-- Arrows to go to next/previous. -->
+<ng-template #navArrows>
+    <ion-grid>
+        <ion-row class="ion-align-items-center">
+            <ion-col class="ion-text-start">
+                <ion-button color="light" *ngIf="previousPage >= 0" (click)="changePage(previousPage)"
+                    [title]="'core.previous' | translate">
+                    <ion-icon name="fas-chevron-left" slot="icon-only"></ion-icon>
+                </ion-button>
+            </ion-col>
+            <ion-col class="ion-text-end">
+                <ion-button color="light" *ngIf="nextPage >= -1" (click)="changePage(nextPage)" [title]="'core.next' | translate">
+                    <ion-icon name="fas-chevron-right" slot="icon-only"></ion-icon>
+                </ion-button>
+            </ion-col>
+        </ion-row>
+    </ion-grid>
+</ng-template>

src/addons/mod/quiz/pages/review/review.module.ts

@@ -0,0 +1,40 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { NgModule } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { CoreQuestionComponentsModule } from '@features/question/components/components.module';
+import { AddonModQuizReviewPage } from './review';
+
+const routes: Routes = [
+    {
+        path: '',
+        component: AddonModQuizReviewPage,
+    },
+];
+
+@NgModule({
+    imports: [
+        RouterModule.forChild(routes),
+        CoreSharedModule,
+        CoreQuestionComponentsModule,
+    ],
+    declarations: [
+        AddonModQuizReviewPage,
+    ],
+    exports: [RouterModule],
+})
+export class AddonModQuizReviewPageModule {}

src/addons/mod/quiz/pages/review/review.scss

@@ -0,0 +1,6 @@
+:host {
+    .addon-mod_quiz-question-note p {
+        margin-top: 2px;
+        margin-bottom: 2px;
+    }
+}

src/addons/mod/quiz/pages/review/review.ts

@@ -0,0 +1,367 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, ElementRef, OnInit, ViewChild } from '@angular/core';
+import { CoreQuestionQuestionParsed } from '@features/question/services/question';
+import { CoreQuestionHelper } from '@features/question/services/question-helper';
+import { IonContent, IonRefresher } from '@ionic/angular';
+import { CoreNavigator } from '@services/navigator';
+import { CoreDomUtils } from '@services/utils/dom';
+import { CoreTextUtils } from '@services/utils/text';
+import { CoreTimeUtils } from '@services/utils/time';
+import { CoreUtils } from '@services/utils/utils';
+import { ModalController, Translate } from '@singletons';
+import {
+    AddonModQuizNavigationModalComponent,
+    AddonModQuizNavigationQuestion,
+} from '../../components/navigation-modal/navigation-modal';
+import {
+    AddonModQuiz,
+    AddonModQuizAttemptWSData,
+    AddonModQuizCombinedReviewOptions,
+    AddonModQuizGetAttemptReviewResponse,
+    AddonModQuizProvider,
+    AddonModQuizQuizWSData,
+    AddonModQuizWSAdditionalData,
+} from '../../services/quiz';
+import { AddonModQuizHelper } from '../../services/quiz-helper';
+
+/**
+ * Page that allows reviewing a quiz attempt.
+ */
+@Component({
+    selector: 'page-addon-mod-quiz-review',
+    templateUrl: 'review.html',
+    styleUrls: ['review.scss'],
+})
+export class AddonModQuizReviewPage implements OnInit {
+
+    @ViewChild(IonContent) content?: IonContent;
+
+    attempt?: AddonModQuizAttemptWSData; // The attempt being reviewed.
+    component = AddonModQuizProvider.COMPONENT; // Component to link the files to.
+    showAll = false; // Whether to view all questions in the same page.
+    numPages?: number; // Number of pages.
+    showCompleted = false; // Whether to show completed time.
+    additionalData?: AddonModQuizWSAdditionalData[]; // Additional data to display for the attempt.
+    loaded = false; // Whether data has been loaded.
+    navigation: AddonModQuizNavigationQuestion[] = []; // List of questions to navigate them.
+    questions: QuizQuestion[] = []; // Questions of the current page.
+    nextPage = -2; // Next page.
+    previousPage = -2; // Previous page.
+    readableState?: string;
+    readableGrade?: string;
+    readableMark?: string;
+    timeTaken?: string;
+    overTime?: string;
+    quiz?: AddonModQuizQuizWSData; // The quiz the attempt belongs to.
+    courseId!: number; // The course ID the quiz belongs to.
+    cmId!: number; // Course module id the attempt belongs to.
+
+    protected attemptId!: number; // The attempt being reviewed.
+    protected currentPage!: number; // The current page being reviewed.
+    protected options?: AddonModQuizCombinedReviewOptions; // Review options.
+
+    constructor(
+        protected elementRef: ElementRef,
+    ) {
+    }
+
+    /**
+     * Component being initialized.
+     */
+    async ngOnInit(): Promise<void> {
+        this.cmId = CoreNavigator.instance.getRouteNumberParam('cmId')!;
+        this.courseId = CoreNavigator.instance.getRouteNumberParam('courseId')!;
+        this.attemptId = CoreNavigator.instance.getRouteNumberParam('attemptId')!;
+        this.currentPage = CoreNavigator.instance.getRouteNumberParam('page') || -1;
+        this.showAll = this.currentPage == -1;
+
+        try {
+            await this.fetchData();
+
+            CoreUtils.instance.ignoreErrors(
+                AddonModQuiz.instance.logViewAttemptReview(this.attemptId, this.quiz!.id, this.quiz!.name),
+            );
+        } finally {
+            this.loaded = true;
+        }
+    }
+
+    /**
+     * Change the current page. If slot is supplied, try to scroll to that question.
+     *
+     * @param page Page to load. -1 means all questions in same page.
+     * @param fromModal Whether the page was selected using the navigation modal.
+     * @param slot Slot of the question to scroll to.
+     */
+    async changePage(page: number, fromModal?: boolean, slot?: number): Promise<void> {
+        if (typeof slot != 'undefined' && (this.attempt!.currentpage == -1 || page == this.currentPage)) {
+            // Scrol to a certain question in the current page.
+            this.scrollToQuestion(slot);
+
+            return;
+        } else if (page == this.currentPage) {
+            // If the user is navigating to the current page and no question specified, we do nothing.
+            return;
+        }
+
+        this.loaded = false;
+        this.content?.scrollToTop();
+
+        try {
+            await this.loadPage(page);
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'addon.mod_quiz.errorgetquestions', true);
+        } finally {
+            this.loaded = true;
+
+            if (typeof slot != 'undefined') {
+                // Scroll to the question. Give some time to the questions to render.
+                setTimeout(() => {
+                    this.scrollToQuestion(slot);
+                }, 2000);
+            }
+        }
+    }
+
+    /**
+     * Convenience function to get the quiz data.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async fetchData(): Promise<void> {
+        try {
+            this.quiz = await AddonModQuiz.instance.getQuiz(this.courseId, this.cmId);
+
+            this.options = await AddonModQuiz.instance.getCombinedReviewOptions(this.quiz.id, { cmId: this.cmId });
+
+            // Load the navigation data.
+            await this.loadNavigation();
+
+            // Load questions.
+            await this.loadPage(this.currentPage);
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'addon.mod_quiz.errorgetquiz', true);
+        }
+    }
+
+    /**
+     * Load a page questions.
+     *
+     * @param page The page to load.
+     * @return Promise resolved when done.
+     */
+    protected async loadPage(page: number): Promise<void> {
+        const data = await AddonModQuiz.instance.getAttemptReview(this.attemptId, { page, cmId: this.quiz!.coursemodule });
+
+        this.attempt = data.attempt;
+        this.attempt.currentpage = page;
+        this.currentPage = page;
+
+        // Set the summary data.
+        this.setSummaryCalculatedData(data);
+
+        this.questions = data.questions;
+        this.nextPage = page == -1 ? -2 : page + 1;
+        this.previousPage = page - 1;
+
+        this.questions.forEach((question) => {
+            // Get the readable mark for each question.
+            question.readableMark = AddonModQuizHelper.instance.getQuestionMarkFromHtml(question.html);
+
+            // Extract the question info box.
+            CoreQuestionHelper.instance.extractQuestionInfoBox(question, '.info');
+        });
+    }
+
+    /**
+     * Load data to navigate the questions using the navigation modal.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async loadNavigation(): Promise<void> {
+        // Get all questions in single page to retrieve all the questions.
+        const data = await AddonModQuiz.instance.getAttemptReview(this.attemptId, { page: -1, cmId: this.quiz!.coursemodule });
+
+        this.navigation = data.questions;
+
+        this.navigation.forEach((question) => {
+            question.stateClass = CoreQuestionHelper.instance.getQuestionStateClass(question.state || '');
+        });
+
+        const lastQuestion = data.questions[data.questions.length - 1];
+        this.numPages = lastQuestion ? lastQuestion.page + 1 : 0;
+    }
+
+    /**
+     * Refreshes data.
+     *
+     * @param refresher Refresher
+     */
+    async refreshData(refresher: IonRefresher): Promise<void> {
+        const promises: Promise<void>[] = [];
+
+        promises.push(AddonModQuiz.instance.invalidateQuizData(this.courseId));
+        promises.push(AddonModQuiz.instance.invalidateAttemptReview(this.attemptId));
+        if (this.quiz) {
+            promises.push(AddonModQuiz.instance.invalidateCombinedReviewOptionsForUser(this.quiz.id));
+        }
+
+        await CoreUtils.instance.ignoreErrors(Promise.all(promises));
+
+        try {
+            await this.fetchData();
+        } finally {
+            refresher.complete();
+        }
+    }
+
+    /**
+     * Scroll to a certain question.
+     *
+     * @param slot Slot of the question to scroll to.
+     */
+    protected scrollToQuestion(slot: number): void {
+        CoreDomUtils.instance.scrollToElementBySelector(
+            this.elementRef.nativeElement,
+            this.content,
+            `#addon-mod_quiz-question-${slot}`,
+        );
+    }
+
+    /**
+     * Calculate review summary data.
+     *
+     * @param data Result of getAttemptReview.
+     */
+    protected setSummaryCalculatedData(data: AddonModQuizGetAttemptReviewResponse): void {
+        if (!this.attempt || !this.quiz) {
+            return;
+        }
+
+        this.readableState = AddonModQuiz.instance.getAttemptReadableStateName(this.attempt!.state || '');
+
+        if (this.attempt.state != AddonModQuizProvider.ATTEMPT_FINISHED) {
+            return;
+        }
+
+        this.showCompleted = true;
+        this.additionalData = data.additionaldata;
+
+        const timeTaken = (this.attempt.timefinish || 0) - (this.attempt.timestart || 0);
+        if (timeTaken > 0) {
+            // Format time taken.
+            this.timeTaken = CoreTimeUtils.instance.formatTime(timeTaken);
+
+            // Calculate overdue time.
+            if (this.quiz.timelimit && timeTaken > this.quiz.timelimit + 60) {
+                this.overTime = CoreTimeUtils.instance.formatTime(timeTaken - this.quiz.timelimit);
+            }
+        } else {
+            this.timeTaken = undefined;
+        }
+
+        // Treat grade.
+        if (this.options!.someoptions.marks >= AddonModQuizProvider.QUESTION_OPTIONS_MARK_AND_MAX &&
+                AddonModQuiz.instance.quizHasGrades(this.quiz)) {
+
+            if (data.grade === null || typeof data.grade == 'undefined') {
+                this.readableGrade = AddonModQuiz.instance.formatGrade(data.grade, this.quiz.decimalpoints);
+            } else {
+                // Show raw marks only if they are different from the grade (like on the entry page).
+                if (this.quiz.grade != this.quiz.sumgrades) {
+                    this.readableMark = Translate.instance.instant('addon.mod_quiz.outofshort', { $a: {
+                        grade: AddonModQuiz.instance.formatGrade(this.attempt.sumgrades, this.quiz.decimalpoints),
+                        maxgrade: AddonModQuiz.instance.formatGrade(this.quiz.sumgrades, this.quiz.decimalpoints),
+                    } });
+                }
+
+                // Now the scaled grade.
+                const gradeObject: Record<string, unknown> = {
+                    grade: AddonModQuiz.instance.formatGrade(Number(data.grade), this.quiz.decimalpoints),
+                    maxgrade: AddonModQuiz.instance.formatGrade(this.quiz.grade, this.quiz.decimalpoints),
+                };
+
+                if (this.quiz.grade != 100) {
+                    gradeObject.percent = CoreTextUtils.instance.roundToDecimals(
+                        this.attempt.sumgrades! * 100 / this.quiz.sumgrades!,
+                        0,
+                    );
+                    this.readableGrade = Translate.instance.instant('addon.mod_quiz.outofpercent', { $a: gradeObject });
+                } else {
+                    this.readableGrade = Translate.instance.instant('addon.mod_quiz.outof', { $a: gradeObject });
+                }
+            }
+        }
+
+        // Treat additional data.
+        this.additionalData.forEach((data) => {
+            // Remove help links from additional data.
+            data.content = CoreDomUtils.instance.removeElementFromHtml(data.content, '.helptooltip');
+        });
+    }
+
+    /**
+     * Switch mode: all questions in same page OR one page at a time.
+     */
+    switchMode(): void {
+        this.showAll = !this.showAll;
+
+        // Load all questions or first page, depending on the mode.
+        this.loadPage(this.showAll ? -1 : 0);
+    }
+
+    async openNavigation(): Promise<void> {
+        // Create the navigation modal.
+        const modal = await ModalController.instance.create({
+            component: AddonModQuizNavigationModalComponent,
+            componentProps: {
+                navigation: this.navigation,
+                summaryShown: false,
+                currentPage: this.attempt?.currentpage,
+                isReview: true,
+                numPages: this.numPages,
+                showAll: this.showAll,
+            },
+            cssClass: 'core-modal-lateral',
+            showBackdrop: true,
+            backdropDismiss: true,
+            // @todo enterAnimation: 'core-modal-lateral-transition',
+            // @todo leaveAnimation: 'core-modal-lateral-transition',
+        });
+
+        await modal.present();
+
+        const result = await modal.onWillDismiss();
+
+        if (!result.data) {
+            return;
+        }
+
+        if (result.data.action == AddonModQuizNavigationModalComponent.CHANGE_PAGE) {
+            this.changePage(result.data.page, true, result.data.slot);
+        } else if (result.data.action == AddonModQuizNavigationModalComponent.SWITCH_MODE) {
+            this.switchMode();
+        }
+    }
+
+}
+
+/**
+ * Question with some calculated data for the view.
+ */
+type QuizQuestion = CoreQuestionQuestionParsed & {
+    readableMark?: string;
+};

src/addons/mod/quiz/quiz-lazy.module.ts

@@ -0,0 +1,40 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { NgModule } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+const routes: Routes = [
+    {
+        path: ':courseId/:cmId',
+        loadChildren: () => import('./pages/index/index.module').then( m => m.AddonModQuizIndexPageModule),
+    },
+    {
+        path: ':courseId/:cmId/player',
+        loadChildren: () => import('./pages/player/player.module').then( m => m.AddonModQuizPlayerPageModule),
+    },
+    {
+        path: ':courseId/:cmId/attempt/:attemptId',
+        loadChildren: () => import('./pages/attempt/attempt.module').then( m => m.AddonModQuizAttemptPageModule),
+    },
+    {
+        path: ':courseId/:cmId/review/:attemptId',
+        loadChildren: () => import('./pages/review/review.module').then( m => m.AddonModQuizReviewPageModule),
+    },
+];
+
+@NgModule({
+    imports: [RouterModule.forChild(routes)],
+})
+export class AddonModQuizLazyModule {}

src/addons/mod/quiz/quiz.module.ts

@@ -0,0 +1,73 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+import { Routes } from '@angular/router';
+import { CoreContentLinksDelegate } from '@features/contentlinks/services/contentlinks-delegate';
+
+import { CoreCourseModuleDelegate } from '@features/course/services/module-delegate';
+import { CoreCourseModulePrefetchDelegate } from '@features/course/services/module-prefetch-delegate';
+import { CoreMainMenuTabRoutingModule } from '@features/mainmenu/mainmenu-tab-routing.module';
+import { CorePushNotificationsDelegate } from '@features/pushnotifications/services/push-delegate';
+import { CoreCronDelegate } from '@services/cron';
+import { CORE_SITE_SCHEMAS } from '@services/sites';
+import { AddonModQuizAccessRulesModule } from './accessrules/accessrules.module';
+import { AddonModQuizComponentsModule } from './components/components.module';
+import { SITE_SCHEMA } from './services/database/quiz';
+import { AddonModQuizGradeLinkHandler } from './services/handlers/grade-link';
+import { AddonModQuizIndexLinkHandler } from './services/handlers/index-link';
+import { AddonModQuizListLinkHandler } from './services/handlers/list-link';
+import { AddonModQuizModuleHandler, AddonModQuizModuleHandlerService } from './services/handlers/module';
+import { AddonModQuizPrefetchHandler } from './services/handlers/prefetch';
+import { AddonModQuizPushClickHandler } from './services/handlers/push-click';
+import { AddonModQuizReviewLinkHandler } from './services/handlers/review-link';
+import { AddonModQuizSyncCronHandler } from './services/handlers/sync-cron';
+
+const routes: Routes = [
+    {
+        path: AddonModQuizModuleHandlerService.PAGE_NAME,
+        loadChildren: () => import('./quiz-lazy.module').then(m => m.AddonModQuizLazyModule),
+    },
+];
+
+@NgModule({
+    imports: [
+        CoreMainMenuTabRoutingModule.forChild(routes),
+        AddonModQuizComponentsModule,
+        AddonModQuizAccessRulesModule,
+    ],
+    providers: [
+        {
+            provide: CORE_SITE_SCHEMAS,
+            useValue: [SITE_SCHEMA],
+            multi: true,
+        },
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                CoreCourseModuleDelegate.instance.registerHandler(AddonModQuizModuleHandler.instance);
+                CoreCourseModulePrefetchDelegate.instance.registerHandler(AddonModQuizPrefetchHandler.instance);
+                CoreContentLinksDelegate.instance.registerHandler(AddonModQuizGradeLinkHandler.instance);
+                CoreContentLinksDelegate.instance.registerHandler(AddonModQuizIndexLinkHandler.instance);
+                CoreContentLinksDelegate.instance.registerHandler(AddonModQuizListLinkHandler.instance);
+                CoreContentLinksDelegate.instance.registerHandler(AddonModQuizReviewLinkHandler.instance);
+                CorePushNotificationsDelegate.instance.registerClickHandler(AddonModQuizPushClickHandler.instance);
+                CoreCronDelegate.instance.register(AddonModQuizSyncCronHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonModQuizModule {}

src/addons/mod/quiz/services/access-rules-delegate.ts

@@ -0,0 +1,326 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable, Type } from '@angular/core';
+
+import { CoreDelegate, CoreDelegateHandler } from '@classes/delegate';
+import { CoreUtils } from '@services/utils/utils';
+import { makeSingleton } from '@singletons';
+import { AddonModQuizAttemptWSData, AddonModQuizQuizWSData } from './quiz';
+
+/**
+ * Interface that all access rules handlers must implement.
+ */
+export interface AddonModQuizAccessRuleHandler extends CoreDelegateHandler {
+
+    /**
+     * Name of the rule the handler supports. E.g. 'password'.
+     */
+    ruleName: string;
+
+    /**
+     * Whether the rule requires a preflight check when prefetch/start/continue an attempt.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Whether the rule requires a preflight check.
+     */
+    isPreflightCheckRequired(
+        quiz: AddonModQuizQuizWSData,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        siteId?: string,
+    ): boolean | Promise<boolean>;
+
+    /**
+     * Add preflight data that doesn't require user interaction. The data should be added to the preflightData param.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param preflightData Object where to add the preflight data.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done if async, void if it's synchronous.
+     */
+    getFixedPreflightData?(
+        quiz: AddonModQuizQuizWSData,
+        preflightData: Record<string, string>,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        siteId?: string,
+    ): void | Promise<void>;
+
+    /**
+     * Return the Component to use to display the access rule preflight.
+     * Implement this if your access rule requires a preflight check with user interaction.
+     * It's recommended to return the class of the component, but you can also return an instance of the component.
+     *
+     * @return The component (or promise resolved with component) to use, undefined if not found.
+     */
+    getPreflightComponent?(): Type<unknown> | Promise<Type<unknown>>;
+
+    /**
+     * Function called when the preflight check has passed. This is a chance to record that fact in some way.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued.
+     * @param preflightData Preflight data gathered.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done if async, void if it's synchronous.
+     */
+    notifyPreflightCheckPassed?(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData | undefined,
+        preflightData: Record<string, string>,
+        prefetch?: boolean,
+        siteId?: string,
+    ): void | Promise<void>;
+
+    /**
+     * Function called when the preflight check fails. This is a chance to record that fact in some way.
+     *
+     * @param quiz The quiz the rule belongs to.
+     * @param attempt The attempt started/continued.
+     * @param preflightData Preflight data gathered.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done if async, void if it's synchronous.
+     */
+    notifyPreflightCheckFailed?(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData | undefined,
+        preflightData: Record<string, string>,
+        prefetch?: boolean,
+        siteId?: string,
+    ): void | Promise<void>;
+
+    /**
+     * Whether or not the time left of an attempt should be displayed.
+     *
+     * @param attempt The attempt.
+     * @param endTime The attempt end time (in seconds).
+     * @param timeNow The current time in seconds.
+     * @return Whether it should be displayed.
+     */
+    shouldShowTimeLeft?(attempt: AddonModQuizAttemptWSData, endTime: number, timeNow: number): boolean;
+}
+
+/**
+ * Delegate to register access rules for quiz module.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizAccessRuleDelegateService extends CoreDelegate<AddonModQuizAccessRuleHandler> {
+
+    protected handlerNameProperty = 'ruleName';
+
+    constructor() {
+        super('AddonModQuizAccessRulesDelegate', true);
+    }
+
+    /**
+     * Get the handler for a certain rule.
+     *
+     * @param ruleName Name of the access rule.
+     * @return Handler. Undefined if no handler found for the rule.
+     */
+    getAccessRuleHandler(ruleName: string): AddonModQuizAccessRuleHandler {
+        return this.getHandler(ruleName, true);
+    }
+
+    /**
+     * Given a list of rules, get some fixed preflight data (data that doesn't require user interaction).
+     *
+     * @param rules List of active rules names.
+     * @param quiz Quiz.
+     * @param preflightData Object where to store the preflight data.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when all the data has been gathered.
+     */
+    async getFixedPreflightData(
+        rules: string[],
+        quiz: AddonModQuizQuizWSData,
+        preflightData: Record<string, string>,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<void> {
+        rules = rules || [];
+
+        await CoreUtils.instance.ignoreErrors(CoreUtils.instance.allPromises(rules.map(async (rule) => {
+            await this.executeFunctionOnEnabled(rule, 'getFixedPreflightData', [quiz, preflightData, attempt, prefetch, siteId]);
+        })));
+    }
+
+    /**
+     * Get the Component to use to display the access rule preflight.
+     *
+     * @param rule Rule.
+     * @return Promise resolved with the component to use, undefined if not found.
+     */
+    getPreflightComponent(rule: string): Promise<Type<unknown> | undefined> {
+        return Promise.resolve(this.executeFunctionOnEnabled(rule, 'getPreflightComponent', []));
+    }
+
+    /**
+     * Check if an access rule is supported.
+     *
+     * @param ruleName Name of the rule.
+     * @return Whether it's supported.
+     */
+    isAccessRuleSupported(ruleName: string): boolean {
+        return this.hasHandler(ruleName, true);
+    }
+
+    /**
+     * Given a list of rules, check if preflight check is required.
+     *
+     * @param rules List of active rules names.
+     * @param quiz Quiz.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with boolean: whether it's required.
+     */
+    async isPreflightCheckRequired(
+        rules: string[],
+        quiz: AddonModQuizQuizWSData,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<boolean> {
+        rules = rules || [];
+        let isRequired = false;
+
+        await CoreUtils.instance.ignoreErrors(CoreUtils.instance.allPromises(rules.map(async (rule) => {
+            const ruleRequired = await this.isPreflightCheckRequiredForRule(rule, quiz, attempt, prefetch, siteId);
+
+            isRequired = isRequired || ruleRequired;
+        })));
+
+        return isRequired;
+    }
+
+    /**
+     * Check if preflight check is required for a certain rule.
+     *
+     * @param rule Rule name.
+     * @param quiz Quiz.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with boolean: whether it's required.
+     */
+    async isPreflightCheckRequiredForRule(
+        rule: string,
+        quiz: AddonModQuizQuizWSData,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<boolean> {
+        const isRequired = await this.executeFunctionOnEnabled(rule, 'isPreflightCheckRequired', [quiz, attempt, prefetch, siteId]);
+
+        return !!isRequired;
+    }
+
+    /**
+     * Notify all rules that the preflight check has passed.
+     *
+     * @param rules List of active rules names.
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param preflightData Preflight data gathered.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async notifyPreflightCheckPassed(
+        rules: string[],
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData | undefined,
+        preflightData: Record<string, string>,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<void> {
+        rules = rules || [];
+
+        await CoreUtils.instance.ignoreErrors(CoreUtils.instance.allPromises(rules.map(async (rule) => {
+            await this.executeFunctionOnEnabled(
+                rule,
+                'notifyPreflightCheckPassed',
+                [quiz, attempt, preflightData, prefetch, siteId],
+            );
+        })));
+    }
+
+    /**
+     * Notify all rules that the preflight check has failed.
+     *
+     * @param rules List of active rules names.
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param preflightData Preflight data gathered.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async notifyPreflightCheckFailed(
+        rules: string[],
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData | undefined,
+        preflightData: Record<string, string>,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<void> {
+        rules = rules || [];
+
+        await CoreUtils.instance.ignoreErrors(CoreUtils.instance.allPromises(rules.map(async (rule) => {
+            await this.executeFunctionOnEnabled(
+                rule,
+                'notifyPreflightCheckFailed',
+                [quiz, attempt, preflightData, prefetch, siteId],
+            );
+        })));
+    }
+
+    /**
+     * Whether or not the time left of an attempt should be displayed.
+     *
+     * @param rules List of active rules names.
+     * @param attempt The attempt.
+     * @param endTime The attempt end time (in seconds).
+     * @param timeNow The current time in seconds.
+     * @return Whether it should be displayed.
+     */
+    shouldShowTimeLeft(rules: string[], attempt: AddonModQuizAttemptWSData, endTime: number, timeNow: number): boolean {
+        rules = rules || [];
+
+        for (const i in rules) {
+            const rule = rules[i];
+
+            if (this.executeFunctionOnEnabled(rule, 'shouldShowTimeLeft', [attempt, endTime, timeNow])) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+}
+
+export class AddonModQuizAccessRuleDelegate extends makeSingleton(AddonModQuizAccessRuleDelegateService) {}

src/addons/mod/quiz/services/database/quiz.ts

@@ -0,0 +1,83 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { CoreSiteSchema } from '@services/sites';
+
+/**
+ * Database variables for AddonModQuizOfflineProvider.
+ */
+export const ATTEMPTS_TABLE_NAME = 'addon_mod_quiz_attempts';
+export const SITE_SCHEMA: CoreSiteSchema = {
+    name: 'AddonModQuizOfflineProvider',
+    version: 1,
+    tables: [
+        {
+            name: ATTEMPTS_TABLE_NAME,
+            columns: [
+                {
+                    name: 'id', // Attempt ID.
+                    type: 'INTEGER',
+                    primaryKey: true,
+                },
+                {
+                    name: 'attempt', // Attempt number.
+                    type: 'INTEGER',
+                },
+                {
+                    name: 'courseid',
+                    type: 'INTEGER',
+                },
+                {
+                    name: 'userid',
+                    type: 'INTEGER',
+                },
+                {
+                    name: 'quizid',
+                    type: 'INTEGER',
+                },
+                {
+                    name: 'currentpage',
+                    type: 'INTEGER',
+                },
+                {
+                    name: 'timecreated',
+                    type: 'INTEGER',
+                },
+                {
+                    name: 'timemodified',
+                    type: 'INTEGER',
+                },
+                {
+                    name: 'finished',
+                    type: 'INTEGER',
+                },
+            ],
+        },
+    ],
+};
+
+/**
+ * Quiz attempt.
+ */
+export type AddonModQuizAttemptDBRecord = {
+    id: number;
+    attempt: number;
+    courseid: number;
+    userid: number;
+    quizid: number;
+    currentpage?: number;
+    timecreated: number;
+    timemodified: number;
+    finished: number;
+};

src/addons/mod/quiz/services/handlers/grade-link.ts

@@ -0,0 +1,35 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreContentLinksModuleGradeHandler } from '@features/contentlinks/classes/module-grade-handler';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to treat links to quiz grade.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizGradeLinkHandlerService extends CoreContentLinksModuleGradeHandler {
+
+    name = 'AddonModQuizGradeLinkHandler';
+    canReview = false;
+
+    constructor() {
+        super('AddonModQuiz', 'quiz');
+    }
+
+}
+
+export class AddonModQuizGradeLinkHandler extends makeSingleton(AddonModQuizGradeLinkHandlerService) {}

src/addons/mod/quiz/services/handlers/index-link.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreContentLinksModuleIndexHandler } from '@features/contentlinks/classes/module-index-handler';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to treat links to quiz index.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizIndexLinkHandlerService extends CoreContentLinksModuleIndexHandler {
+
+    name = 'AddonModQuizIndexLinkHandler';
+
+    constructor() {
+        super('AddonModQuiz', 'quiz', 'q');
+    }
+
+}
+
+export class AddonModQuizIndexLinkHandler extends makeSingleton(AddonModQuizIndexLinkHandlerService) {}

src/addons/mod/quiz/services/handlers/list-link.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreContentLinksModuleListHandler } from '@features/contentlinks/classes/module-list-handler';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to treat links to quiz list page.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizListLinkHandlerService extends CoreContentLinksModuleListHandler {
+
+    name = 'AddonModQuizListLinkHandler';
+
+    constructor() {
+        super('AddonModQuiz', 'quiz');
+    }
+
+}
+
+export class AddonModQuizListLinkHandler extends makeSingleton(AddonModQuizListLinkHandlerService) {}

src/addons/mod/quiz/services/handlers/module.ts

@@ -0,0 +1,98 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable, Type } from '@angular/core';
+
+import { CoreConstants } from '@/core/constants';
+import { CoreCourseModuleHandler, CoreCourseModuleHandlerData } from '@features/course/services/module-delegate';
+import { CoreCourse, CoreCourseAnyModuleData } from '@features/course/services/course';
+import { CoreCourseModule } from '@features/course/services/course-helper';
+import { CoreNavigationOptions, CoreNavigator } from '@services/navigator';
+import { AddonModQuizIndexComponent } from '../../components/index';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support quiz modules.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizModuleHandlerService implements CoreCourseModuleHandler {
+
+    static readonly PAGE_NAME = 'mod_quiz';
+
+    name = 'AddonModQuiz';
+    modName = 'quiz';
+
+    supportedFeatures = {
+        [CoreConstants.FEATURE_GROUPS]: true,
+        [CoreConstants.FEATURE_GROUPINGS]: true,
+        [CoreConstants.FEATURE_MOD_INTRO]: true,
+        [CoreConstants.FEATURE_COMPLETION_TRACKS_VIEWS]: true,
+        [CoreConstants.FEATURE_COMPLETION_HAS_RULES]: true,
+        [CoreConstants.FEATURE_GRADE_HAS_GRADE]: true,
+        [CoreConstants.FEATURE_GRADE_OUTCOMES]: true,
+        [CoreConstants.FEATURE_BACKUP_MOODLE2]: true,
+        [CoreConstants.FEATURE_SHOW_DESCRIPTION]: true,
+        [CoreConstants.FEATURE_CONTROLS_GRADE_VISIBILITY]: true,
+        [CoreConstants.FEATURE_USES_QUESTIONS]: true,
+    };
+
+    /**
+     * Check if the handler is enabled on a site level.
+     *
+     * @return Whether or not the handler is enabled on a site level.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Get the data required to display the module in the course contents view.
+     *
+     * @param module The module object.
+     * @param courseId The course ID.
+     * @param sectionId The section ID.
+     * @return Data to render the module.
+     */
+    getData(module: CoreCourseAnyModuleData): CoreCourseModuleHandlerData {
+        return {
+            icon: CoreCourse.instance.getModuleIconSrc(this.modName, 'modicon' in module ? module.modicon : undefined),
+            title: module.name,
+            class: 'addon-mod_quiz-handler',
+            showDownloadButton: true,
+            action: (event: Event, module: CoreCourseModule, courseId: number, options?: CoreNavigationOptions) => {
+                options = options || {};
+                options.params = options.params || {};
+                Object.assign(options.params, { module });
+                const routeParams = '/' + courseId + '/' + module.id;
+
+                CoreNavigator.instance.navigateToSitePath(AddonModQuizModuleHandlerService.PAGE_NAME + routeParams, options);
+            },
+        };
+    }
+
+    /**
+     * Get the component to render the module. This is needed to support singleactivity course format.
+     * The component returned must implement CoreCourseModuleMainComponent.
+     *
+     * @param course The course object.
+     * @param module The module object.
+     * @return The component to use, undefined if not found.
+     */
+    async getMainComponent(): Promise<Type<unknown>> {
+        return AddonModQuizIndexComponent;
+    }
+
+}
+
+export class AddonModQuizModuleHandler extends makeSingleton(AddonModQuizModuleHandlerService) {}

src/addons/mod/quiz/services/handlers/prefetch.ts

@@ -0,0 +1,659 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { CoreConstants } from '@/core/constants';
+
+import { Injectable } from '@angular/core';
+import { CoreError } from '@classes/errors/error';
+import { CoreCourseActivityPrefetchHandlerBase } from '@features/course/classes/activity-prefetch-handler';
+import { CoreCourseAnyModuleData, CoreCourseCommonModWSOptions } from '@features/course/services/course';
+import { CoreQuestionHelper } from '@features/question/services/question-helper';
+import { CoreFilepool } from '@services/filepool';
+import { CoreSites, CoreSitesReadingStrategy } from '@services/sites';
+import { CoreTextUtils } from '@services/utils/text';
+import { CoreUtils } from '@services/utils/utils';
+import { CoreWSExternalFile } from '@services/ws';
+import { makeSingleton } from '@singletons';
+import { AddonModQuizAccessRuleDelegate } from '../access-rules-delegate';
+import {
+    AddonModQuiz,
+    AddonModQuizAttemptWSData,
+    AddonModQuizGetQuizAccessInformationWSResponse,
+    AddonModQuizProvider,
+    AddonModQuizQuizWSData,
+} from '../quiz';
+import { AddonModQuizHelper } from '../quiz-helper';
+import { AddonModQuizSync, AddonModQuizSyncResult } from '../quiz-sync';
+
+/**
+ * Handler to prefetch quizzes.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizPrefetchHandlerService extends CoreCourseActivityPrefetchHandlerBase {
+
+    name = 'AddonModQuiz';
+    modName = 'quiz';
+    component = AddonModQuizProvider.COMPONENT;
+    updatesNames = /^configuration$|^.*files$|^grades$|^gradeitems$|^questions$|^attempts$/;
+
+    /**
+     * Download the module.
+     *
+     * @param module The module object returned by WS.
+     * @param courseId Course ID.
+     * @param dirPath Path of the directory where to store all the content files.
+     * @param single True if we're downloading a single module, false if we're downloading a whole section.
+     * @param canStart If true, start a new attempt if needed.
+     * @return Promise resolved when all content is downloaded.
+     */
+    download(
+        module: CoreCourseAnyModuleData,
+        courseId: number,
+        dirPath?: string,
+        single?: boolean,
+        canStart: boolean = true,
+    ): Promise<void> {
+        // Same implementation for download and prefetch.
+        return this.prefetch(module, courseId, single, dirPath, canStart);
+    }
+
+    /**
+     * Get list of files. If not defined, we'll assume they're in module.contents.
+     *
+     * @param module Module.
+     * @param courseId Course ID the module belongs to.
+     * @param single True if we're downloading a single module, false if we're downloading a whole section.
+     * @return Promise resolved with the list of files.
+     */
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    async getFiles(module: CoreCourseAnyModuleData, courseId: number, single?: boolean): Promise<CoreWSExternalFile[]> {
+        try {
+            const quiz = await AddonModQuiz.instance.getQuiz(courseId, module.id);
+
+            const files = this.getIntroFilesFromInstance(module, quiz);
+
+            const attempts = await AddonModQuiz.instance.getUserAttempts(quiz.id, {
+                cmId: module.id,
+                readingStrategy: CoreSitesReadingStrategy.OnlyNetwork,
+            });
+
+            const attemptFiles = await this.getAttemptsFeedbackFiles(quiz, attempts);
+
+            return files.concat(attemptFiles);
+        } catch {
+            // Quiz not found, return empty list.
+            return [];
+        }
+    }
+
+    /**
+     * Get the list of downloadable files on feedback attemptss.
+     *
+     * @param quiz Quiz.
+     * @param attempts Quiz user attempts.
+     * @param siteId Site ID. If not defined, current site.
+     * @return List of Files.
+     */
+    protected async getAttemptsFeedbackFiles(
+        quiz: AddonModQuizQuizWSData,
+        attempts: AddonModQuizAttemptWSData[],
+        siteId?: string,
+    ): Promise<CoreWSExternalFile[]> {
+        const getInlineFiles = CoreSites.instance.getCurrentSite()?.isVersionGreaterEqualThan('3.2');
+        let files: CoreWSExternalFile[] = [];
+
+        await Promise.all(attempts.map(async (attempt) => {
+            if (!AddonModQuiz.instance.isAttemptFinished(attempt.state)) {
+                // Attempt not finished, no feedback files.
+                return;
+            }
+
+            const attemptGrade = AddonModQuiz.instance.rescaleGrade(attempt.sumgrades, quiz, false);
+            if (typeof attemptGrade == 'undefined') {
+                return;
+            }
+
+            const feedback = await AddonModQuiz.instance.getFeedbackForGrade(quiz.id, Number(attemptGrade), {
+                cmId: quiz.coursemodule,
+                readingStrategy: CoreSitesReadingStrategy.OnlyNetwork,
+                siteId,
+            });
+
+            if (getInlineFiles && feedback.feedbackinlinefiles?.length) {
+                files = files.concat(feedback.feedbackinlinefiles);
+            } else if (feedback.feedbacktext && !getInlineFiles) {
+                files = files.concat(
+                    CoreFilepool.instance.extractDownloadableFilesFromHtmlAsFakeFileObjects(feedback.feedbacktext),
+                );
+            }
+        }));
+
+        return files;
+    }
+
+    /**
+     * Gather some preflight data for an attempt. This function will start a new attempt if needed.
+     *
+     * @param quiz Quiz.
+     * @param accessInfo Quiz access info returned by AddonModQuizProvider.getQuizAccessInformation.
+     * @param attempt Attempt to continue. Don't pass any value if the user needs to start a new attempt.
+     * @param askPreflight Whether it should ask for preflight data if needed.
+     * @param modalTitle Lang key of the title to set to preflight modal (e.g. 'addon.mod_quiz.startattempt').
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with the preflight data.
+     */
+    async getPreflightData(
+        quiz: AddonModQuizQuizWSData,
+        accessInfo: AddonModQuizGetQuizAccessInformationWSResponse,
+        attempt?: AddonModQuizAttemptWSData,
+        askPreflight?: boolean,
+        title?: string,
+        siteId?: string,
+    ): Promise<Record<string, string>> {
+        const preflightData: Record<string, string> = {};
+
+        if (askPreflight) {
+            // We can ask preflight, check if it's needed and get the data.
+            await AddonModQuizHelper.instance.getAndCheckPreflightData(
+                quiz,
+                accessInfo,
+                preflightData,
+                attempt,
+                false,
+                true,
+                title,
+                siteId,
+            );
+        } else {
+            // Get some fixed preflight data from access rules (data that doesn't require user interaction).
+            const rules = accessInfo?.activerulenames || [];
+
+            await AddonModQuizAccessRuleDelegate.instance.getFixedPreflightData(rules, quiz, preflightData, attempt, true, siteId);
+
+            if (!attempt) {
+                // We need to create a new attempt.
+                await AddonModQuiz.instance.startAttempt(quiz.id, preflightData, false, siteId);
+            }
+        }
+
+        return preflightData;
+    }
+
+    /**
+     * Invalidate the prefetched content.
+     *
+     * @param moduleId The module ID.
+     * @param courseId The course ID the module belongs to.
+     * @return Promise resolved when the data is invalidated.
+     */
+    invalidateContent(moduleId: number, courseId: number): Promise<void> {
+        return AddonModQuiz.instance.invalidateContent(moduleId, courseId);
+    }
+
+    /**
+     * Invalidate WS calls needed to determine module status.
+     *
+     * @param module Module.
+     * @param courseId Course ID the module belongs to.
+     * @return Promise resolved when invalidated.
+     */
+    async invalidateModule(module: CoreCourseAnyModuleData, courseId: number): Promise<void> {
+        // Invalidate the calls required to check if a quiz is downloadable.
+        await Promise.all([
+            AddonModQuiz.instance.invalidateQuizData(courseId),
+            AddonModQuiz.instance.invalidateUserAttemptsForUser(module.instance!),
+        ]);
+    }
+
+    /**
+     * Check if a module can be downloaded. If the function is not defined, we assume that all modules are downloadable.
+     *
+     * @param module Module.
+     * @param courseId Course ID the module belongs to.
+     * @return Whether the module can be downloaded. The promise should never be rejected.
+     */
+    async isDownloadable(module: CoreCourseAnyModuleData, courseId: number): Promise<boolean> {
+        if (CoreSites.instance.getCurrentSite()?.isOfflineDisabled()) {
+            // Don't allow downloading the quiz if offline is disabled to prevent wasting a lot of data when opening it.
+            return false;
+        }
+
+        const siteId = CoreSites.instance.getCurrentSiteId();
+
+        const quiz = await AddonModQuiz.instance.getQuiz(courseId, module.id, { siteId });
+
+        if (quiz.allowofflineattempts !== 1 || quiz.hasquestions === 0) {
+            return false;
+        }
+
+        // Not downloadable if we reached max attempts or the quiz has an unfinished attempt.
+        const attempts = await AddonModQuiz.instance.getUserAttempts(quiz.id, {
+            cmId: module.id,
+            siteId,
+        });
+
+        const isLastFinished = !attempts.length || AddonModQuiz.instance.isAttemptFinished(attempts[attempts.length - 1].state);
+
+        return quiz.attempts === 0 || quiz.attempts! > attempts.length || !isLastFinished;
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return A boolean, or a promise resolved with a boolean, indicating if the handler is enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Prefetch a module.
+     *
+     * @param module Module.
+     * @param courseId Course ID the module belongs to.
+     * @param single True if we're downloading a single module, false if we're downloading a whole section.
+     * @param dirPath Path of the directory where to store all the content files.
+     * @param canStart If true, start a new attempt if needed.
+     * @return Promise resolved when done.
+     */
+    async prefetch(
+        module: SyncedModule,
+        courseId?: number,
+        single?: boolean,
+        dirPath?: string,
+        canStart: boolean = true,
+    ): Promise<void> {
+        if (module.attemptFinished) {
+            // Delete the value so it does not block anything if true.
+            delete module.attemptFinished;
+
+            // Quiz got synced recently and an attempt has finished. Do not prefetch.
+            return;
+        }
+
+        const siteId = CoreSites.instance.getCurrentSiteId();
+
+        return this.prefetchPackage(module, courseId, this.prefetchQuiz.bind(this, module, courseId, single, siteId, canStart));
+    }
+
+    /**
+     * Prefetch a quiz.
+     *
+     * @param module Module.
+     * @param courseId Course ID the module belongs to.
+     * @param single True if we're downloading a single module, false if we're downloading a whole section.
+     * @param siteId Site ID.
+     * @param canStart If true, start a new attempt if needed.
+     * @return Promise resolved when done.
+     */
+    protected async prefetchQuiz(
+        module: CoreCourseAnyModuleData,
+        courseId: number,
+        single: boolean,
+        siteId: string,
+        canStart: boolean,
+    ): Promise<void> {
+        const commonOptions = {
+            readingStrategy: CoreSitesReadingStrategy.OnlyNetwork,
+            siteId,
+        };
+        const modOptions = {
+            cmId: module.id,
+            ...commonOptions, // Include all common options.
+        };
+
+        // Get quiz.
+        const quiz = await AddonModQuiz.instance.getQuiz(courseId, module.id, commonOptions);
+
+        const introFiles = this.getIntroFilesFromInstance(module, quiz);
+
+        // Prefetch some quiz data.
+        // eslint-disable-next-line prefer-const
+        let [quizAccessInfo, attempts, attemptAccessInfo] = await Promise.all([
+            AddonModQuiz.instance.getQuizAccessInformation(quiz.id, modOptions),
+            AddonModQuiz.instance.getUserAttempts(quiz.id, modOptions),
+            AddonModQuiz.instance.getAttemptAccessInformation(quiz.id, 0, modOptions),
+            AddonModQuiz.instance.getQuizRequiredQtypes(quiz.id, modOptions),
+            CoreFilepool.instance.addFilesToQueue(siteId, introFiles, AddonModQuizProvider.COMPONENT, module.id),
+        ]);
+
+        // Check if we need to start a new attempt.
+        let attempt: AddonModQuizAttemptWSData | undefined = attempts[attempts.length - 1];
+        let preflightData: Record<string, string> = {};
+        let startAttempt = false;
+
+        if (canStart || attempt) {
+            if (canStart && (!attempt || AddonModQuiz.instance.isAttemptFinished(attempt.state))) {
+                // Check if the user can attempt the quiz.
+                if (attemptAccessInfo.preventnewattemptreasons.length) {
+                    throw new CoreError(CoreTextUtils.instance.buildMessage(attemptAccessInfo.preventnewattemptreasons));
+                }
+
+                startAttempt = true;
+                attempt = undefined;
+            }
+
+            // Get the preflight data. This function will also start a new attempt if needed.
+            preflightData = await this.getPreflightData(quiz, quizAccessInfo, attempt, single, 'core.download', siteId);
+        }
+
+        const promises: Promise<unknown>[] = [];
+
+        if (startAttempt) {
+            // Re-fetch user attempts since we created a new one.
+            promises.push(AddonModQuiz.instance.getUserAttempts(quiz.id, modOptions).then(async (atts) => {
+                attempts = atts;
+
+                const attemptFiles = await this.getAttemptsFeedbackFiles(quiz, attempts, siteId);
+
+                return CoreFilepool.instance.addFilesToQueue(siteId, attemptFiles, AddonModQuizProvider.COMPONENT, module.id);
+            }));
+
+            // Update the download time to prevent detecting the new attempt as an update.
+            promises.push(CoreUtils.instance.ignoreErrors(
+                CoreFilepool.instance.updatePackageDownloadTime(siteId, AddonModQuizProvider.COMPONENT, module.id),
+            ));
+        } else {
+            // Use the already fetched attempts.
+            promises.push(this.getAttemptsFeedbackFiles(quiz, attempts, siteId).then((attemptFiles) =>
+                CoreFilepool.instance.addFilesToQueue(siteId, attemptFiles, AddonModQuizProvider.COMPONENT, module.id)));
+        }
+
+        // Fetch attempt related data.
+        promises.push(AddonModQuiz.instance.getCombinedReviewOptions(quiz.id, modOptions));
+        promises.push(AddonModQuiz.instance.getUserBestGrade(quiz.id, modOptions));
+        promises.push(this.prefetchGradeAndFeedback(quiz, modOptions, siteId));
+        promises.push(AddonModQuiz.instance.getAttemptAccessInformation(quiz.id, 0, modOptions)); // Last attempt.
+
+        await Promise.all(promises);
+
+        // We have quiz data, now we'll get specific data for each attempt.
+        await Promise.all(attempts.map(async (attempt) => {
+            await this.prefetchAttempt(quiz, attempt, preflightData, siteId);
+        }));
+
+        if (!canStart) {
+            // Nothing else to do.
+            return;
+        }
+
+        // If there's nothing to send, mark the quiz as synchronized.
+        const hasData = await AddonModQuizSync.instance.hasDataToSync(quiz.id, siteId);
+
+        if (!hasData) {
+            AddonModQuizSync.instance.setSyncTime(quiz.id, siteId);
+        }
+    }
+
+    /**
+     * Prefetch all WS data for an attempt.
+     *
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param preflightData Preflight required data (like password).
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when the prefetch is finished. Data returned is not reliable.
+     */
+    async prefetchAttempt(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData,
+        preflightData: Record<string, string>,
+        siteId?: string,
+    ): Promise<void> {
+        const pages = AddonModQuiz.instance.getPagesFromLayout(attempt.layout);
+        const isSequential = AddonModQuiz.instance.isNavigationSequential(quiz);
+        let promises: Promise<unknown>[] = [];
+
+        const modOptions: CoreCourseCommonModWSOptions = {
+            cmId: quiz.coursemodule,
+            readingStrategy: CoreSitesReadingStrategy.OnlyNetwork,
+            siteId,
+        };
+
+        if (AddonModQuiz.instance.isAttemptFinished(attempt.state)) {
+            // Attempt is finished, get feedback and review data.
+            const attemptGrade = AddonModQuiz.instance.rescaleGrade(attempt.sumgrades, quiz, false);
+            if (typeof attemptGrade != 'undefined') {
+                promises.push(AddonModQuiz.instance.getFeedbackForGrade(quiz.id, Number(attemptGrade), modOptions));
+            }
+
+            // Get the review for each page.
+            pages.forEach((page) => {
+                promises.push(CoreUtils.instance.ignoreErrors(AddonModQuiz.instance.getAttemptReview(attempt.id, {
+                    page,
+                    ...modOptions, // Include all options.
+                })));
+            });
+
+            // Get the review for all questions in same page.
+            promises.push(this.prefetchAttemptReviewFiles(quiz, attempt, modOptions, siteId));
+        } else {
+
+            // Attempt not finished, get data needed to continue the attempt.
+            promises.push(AddonModQuiz.instance.getAttemptAccessInformation(quiz.id, attempt.id, modOptions));
+            promises.push(AddonModQuiz.instance.getAttemptSummary(attempt.id, preflightData, modOptions));
+
+            if (attempt.state == AddonModQuizProvider.ATTEMPT_IN_PROGRESS) {
+                // Get data for each page.
+                promises = promises.concat(pages.map(async (page) => {
+                    if (isSequential && page < attempt.currentpage!) {
+                        // Sequential quiz, cannot get pages before the current one.
+                        return;
+                    }
+
+                    const data = await AddonModQuiz.instance.getAttemptData(attempt.id, page, preflightData, modOptions);
+
+                    // Download the files inside the questions.
+                    await Promise.all(data.questions.map(async (question) => {
+                        await CoreQuestionHelper.instance.prefetchQuestionFiles(
+                            question,
+                            this.component,
+                            quiz.coursemodule,
+                            siteId,
+                            attempt.uniqueid,
+                        );
+                    }));
+
+                }));
+            }
+        }
+
+        await Promise.all(promises);
+    }
+
+    /**
+     * Prefetch attempt review and its files.
+     *
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param options Other options.
+     * @param siteId Site ID.
+     * @return Promise resolved when done.
+     */
+    protected async prefetchAttemptReviewFiles(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData,
+        modOptions: CoreCourseCommonModWSOptions,
+        siteId?: string,
+    ): Promise<void> {
+        // Get the review for all questions in same page.
+        const data = await CoreUtils.instance.ignoreErrors(AddonModQuiz.instance.getAttemptReview(attempt.id, {
+            page: -1,
+            ...modOptions, // Include all options.
+        }));
+
+        if (!data) {
+            return;
+        }
+        // Download the files inside the questions.
+        await Promise.all(data.questions.map((question) => {
+            CoreQuestionHelper.instance.prefetchQuestionFiles(
+                question,
+                this.component,
+                quiz.coursemodule,
+                siteId,
+                attempt.uniqueid,
+            );
+        }));
+    }
+
+    /**
+     * Prefetch quiz grade and its feedback.
+     *
+     * @param quiz Quiz.
+     * @param modOptions Other options.
+     * @param siteId Site ID.
+     * @return Promise resolved when done.
+     */
+    protected async prefetchGradeAndFeedback(
+        quiz: AddonModQuizQuizWSData,
+        modOptions: CoreCourseCommonModWSOptions,
+        siteId?: string,
+    ): Promise<void> {
+        try {
+            const gradebookData = await AddonModQuiz.instance.getGradeFromGradebook(quiz.course, quiz.coursemodule, true, siteId);
+
+            if (gradebookData && 'graderaw' in gradebookData && gradebookData.graderaw !== undefined) {
+                await AddonModQuiz.instance.getFeedbackForGrade(quiz.id, gradebookData.graderaw, modOptions);
+            }
+        } catch {
+            // Ignore errors.
+        }
+    }
+
+    /**
+     * Prefetches some data for a quiz and its last attempt.
+     * This function will NOT start a new attempt, it only reads data for the quiz and the last attempt.
+     *
+     * @param quiz Quiz.
+     * @param askPreflight Whether it should ask for preflight data if needed.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async prefetchQuizAndLastAttempt(quiz: AddonModQuizQuizWSData, askPreflight?: boolean, siteId?: string): Promise<void> {
+        siteId = siteId || CoreSites.instance.getCurrentSiteId();
+
+        const modOptions = {
+            cmId: quiz.coursemodule,
+            readingStrategy: CoreSitesReadingStrategy.OnlyNetwork,
+            siteId,
+        };
+
+        // Get quiz data.
+        const [quizAccessInfo, attempts] = await Promise.all([
+            AddonModQuiz.instance.getQuizAccessInformation(quiz.id, modOptions),
+            AddonModQuiz.instance.getUserAttempts(quiz.id, modOptions),
+            AddonModQuiz.instance.getQuizRequiredQtypes(quiz.id, modOptions),
+            AddonModQuiz.instance.getCombinedReviewOptions(quiz.id, modOptions),
+            AddonModQuiz.instance.getUserBestGrade(quiz.id, modOptions),
+            this.prefetchGradeAndFeedback(quiz, modOptions, siteId),
+            AddonModQuiz.instance.getAttemptAccessInformation(quiz.id, 0, modOptions), // Last attempt.
+        ]);
+
+        const lastAttempt = attempts[attempts.length - 1];
+        let preflightData: Record<string, string> = {};
+        if (lastAttempt) {
+            // Get the preflight data.
+            preflightData = await this.getPreflightData(quiz, quizAccessInfo, lastAttempt, askPreflight, 'core.download', siteId);
+
+            // Get data for last attempt.
+            await this.prefetchAttempt(quiz, lastAttempt, preflightData, siteId);
+        }
+
+        // Prefetch finished, set the right status.
+        await this.setStatusAfterPrefetch(quiz, {
+            cmId: quiz.coursemodule,
+            attempts,
+            readingStrategy: CoreSitesReadingStrategy.PreferCache,
+            siteId,
+        });
+    }
+
+    /**
+     * Set the right status to a quiz after prefetching.
+     * If the last attempt is finished or there isn't one, set it as not downloaded to show download icon.
+     *
+     * @param quiz Quiz.
+     * @param options Other options.
+     * @return Promise resolved when done.
+     */
+    async setStatusAfterPrefetch(
+        quiz: AddonModQuizQuizWSData,
+        options: AddonModQuizSetStatusAfterPrefetchOptions = {},
+    ): Promise<void> {
+        options.siteId = options.siteId || CoreSites.instance.getCurrentSiteId();
+
+        let attempts = options.attempts;
+
+        if (!attempts) {
+            // Get the attempts.
+            attempts = await AddonModQuiz.instance.getUserAttempts(quiz.id, options);
+        }
+
+        // Check the current status of the quiz.
+        const status = await CoreFilepool.instance.getPackageStatus(options.siteId, this.component, quiz.coursemodule);
+
+        if (status === CoreConstants.NOT_DOWNLOADED) {
+            return;
+        }
+
+        // Quiz was downloaded, set the new status.
+        // If no attempts or last is finished we'll mark it as not downloaded to show download icon.
+        const lastAttempt = attempts[attempts.length - 1];
+        const isLastFinished = !lastAttempt || AddonModQuiz.instance.isAttemptFinished(lastAttempt.state);
+        const newStatus = isLastFinished ? CoreConstants.NOT_DOWNLOADED : CoreConstants.DOWNLOADED;
+
+        await CoreFilepool.instance.storePackageStatus(options.siteId, newStatus, this.component, quiz.coursemodule);
+    }
+
+    /**
+     * Sync a module.
+     *
+     * @param module Module.
+     * @param courseId Course ID the module belongs to
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async sync(module: SyncedModule, courseId: number, siteId?: string): Promise<AddonModQuizSyncResult | undefined> {
+        const quiz = await AddonModQuiz.instance.getQuiz(courseId, module.id, { siteId });
+
+        try {
+            const result = await AddonModQuizSync.instance.syncQuiz(quiz, false, siteId);
+
+            module.attemptFinished = result.attemptFinished || false;
+
+            return result;
+        } catch {
+            // Ignore errors.
+            module.attemptFinished = false;
+        }
+    }
+
+}
+
+export class AddonModQuizPrefetchHandler extends makeSingleton(AddonModQuizPrefetchHandlerService) {}
+
+/**
+ * Options to pass to setStatusAfterPrefetch.
+ */
+export type AddonModQuizSetStatusAfterPrefetchOptions = CoreCourseCommonModWSOptions & {
+    attempts?: AddonModQuizAttemptWSData[]; // List of attempts. If not provided, they will be calculated.
+};
+
+/**
+ * Module data with some calculated data.
+ */
+type SyncedModule = CoreCourseAnyModuleData & {
+    attemptFinished?: boolean;
+};

src/addons/mod/quiz/services/handlers/push-click.ts

@@ -0,0 +1,86 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreCourseHelper } from '@features/course/services/course-helper';
+import { CorePushNotificationsClickHandler } from '@features/pushnotifications/services/push-delegate';
+import { CorePushNotificationsNotificationBasicData } from '@features/pushnotifications/services/pushnotifications';
+import { CoreUrlUtils } from '@services/utils/url';
+import { CoreUtils } from '@services/utils/utils';
+import { makeSingleton } from '@singletons';
+import { AddonModQuiz } from '../quiz';
+import { AddonModQuizHelper } from '../quiz-helper';
+
+/**
+ * Handler for quiz push notifications clicks.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizPushClickHandlerService implements CorePushNotificationsClickHandler {
+
+    name = 'AddonModQuizPushClickHandler';
+    priority = 200;
+    featureName = 'CoreCourseModuleDelegate_AddonModQuiz';
+
+    protected readonly SUPPORTED_NAMES = ['submission', 'confirmation', 'attempt_overdue'];
+
+    /**
+     * Check if a notification click is handled by this handler.
+     *
+     * @param notification The notification to check.
+     * @return Whether the notification click is handled by this handler
+     */
+    async handles(notification: AddonModQuizPushNotificationData): Promise<boolean> {
+        return CoreUtils.instance.isTrueOrOne(notification.notif) && notification.moodlecomponent == 'mod_quiz' &&
+                this.SUPPORTED_NAMES.indexOf(notification.name!) != -1;
+    }
+
+    /**
+     * Handle the notification click.
+     *
+     * @param notification The notification to check.
+     * @return Promise resolved when done.
+     */
+    async handleClick(notification: AddonModQuizPushNotificationData): Promise<void> {
+        const contextUrlParams = CoreUrlUtils.instance.extractUrlParams(notification.contexturl || '');
+        const data = notification.customdata || {};
+        const courseId = Number(notification.courseid);
+
+        if (notification.name == 'submission') {
+            // A student made a submission, go to view the attempt.
+            return AddonModQuizHelper.instance.handleReviewLink(
+                Number(contextUrlParams.attempt),
+                Number(contextUrlParams.page),
+                courseId,
+                Number(data.instance),
+                notification.site,
+            );
+        }
+
+        // Open the activity.
+        const moduleId = Number(contextUrlParams.id);
+
+        await CoreUtils.instance.ignoreErrors(AddonModQuiz.instance.invalidateContent(moduleId, courseId, notification.site));
+
+        return CoreCourseHelper.instance.navigateToModule(moduleId, notification.site, courseId);
+    }
+
+}
+
+export class AddonModQuizPushClickHandler extends makeSingleton(AddonModQuizPushClickHandlerService) {}
+
+type AddonModQuizPushNotificationData = CorePushNotificationsNotificationBasicData & {
+    contexturl?: string;
+    courseid?: number | string;
+};

src/addons/mod/quiz/services/handlers/review-link.ts

@@ -0,0 +1,66 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+import { CoreContentLinksHandlerBase } from '@features/contentlinks/classes/base-handler';
+import { CoreContentLinksAction } from '@features/contentlinks/services/contentlinks-delegate';
+import { makeSingleton } from '@singletons';
+import { AddonModQuizHelper } from '../quiz-helper';
+
+/**
+ * Handler to treat links to quiz review.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizReviewLinkHandlerService extends CoreContentLinksHandlerBase {
+
+    name = 'AddonModQuizReviewLinkHandler';
+    featureName = 'CoreCourseModuleDelegate_AddonModQuiz';
+    pattern = /\/mod\/quiz\/review\.php.*([&?]attempt=\d+)/;
+
+    /**
+     * Get the list of actions for a link (url).
+     *
+     * @param siteIds List of sites the URL belongs to.
+     * @param url The URL to treat.
+     * @param params The params of the URL. E.g. 'mysite.com?id=1' -> {id: 1}
+     * @param courseId Course ID related to the URL. Optional but recommended.
+     * @param data Extra data to handle the URL.
+     * @return List of (or promise resolved with list of) actions.
+     */
+
+    getActions(
+        siteIds: string[],
+        url: string,
+        params: Record<string, string>,
+        courseId?: number,
+        data?: Record<string, unknown>,
+    ): CoreContentLinksAction[] | Promise<CoreContentLinksAction[]> {
+
+        courseId = Number(courseId || params.courseid || params.cid);
+        data = data || {};
+
+        return [{
+            action: (siteId): void => {
+                const attemptId = parseInt(params.attempt, 10);
+                const page = parseInt(params.page, 10);
+                const quizId = data!.instance ? Number(data!.instance) : undefined;
+
+                AddonModQuizHelper.instance.handleReviewLink(attemptId, page, courseId, quizId, siteId);
+            },
+        }];
+    }
+
+}
+
+export class AddonModQuizReviewLinkHandler extends makeSingleton(AddonModQuizReviewLinkHandlerService) {}

src/addons/mod/quiz/services/handlers/sync-cron.ts

@@ -0,0 +1,52 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreCronHandler } from '@services/cron';
+import { makeSingleton } from '@singletons';
+import { AddonModQuizSync } from '../quiz-sync';
+
+/**
+ * Synchronization cron handler.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizSyncCronHandlerService implements CoreCronHandler {
+
+    name = 'AddonModQuizSyncCronHandler';
+
+    /**
+     * Execute the process.
+     * Receives the ID of the site affected, undefined for all sites.
+     *
+     * @param siteId ID of the site affected, undefined for all sites.
+     * @param force Wether the execution is forced (manual sync).
+     * @return Promise resolved when done, rejected if failure.
+     */
+    execute(siteId?: string, force?: boolean): Promise<void> {
+        return AddonModQuizSync.instance.syncAllQuizzes(siteId, force);
+    }
+
+    /**
+     * Get the time between consecutive executions.
+     *
+     * @return Time between consecutive executions (in ms).
+     */
+    getInterval(): number {
+        return AddonModQuizSync.instance.syncInterval;
+    }
+
+}
+
+export class AddonModQuizSyncCronHandler extends makeSingleton(AddonModQuizSyncCronHandlerService) {}

src/addons/mod/quiz/services/quiz-helper.ts

@@ -0,0 +1,435 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreCanceledError } from '@classes/errors/cancelederror';
+import { CoreError } from '@classes/errors/error';
+import { CoreCourse } from '@features/course/services/course';
+import { CoreNavigator } from '@services/navigator';
+import { CoreSites, CoreSitesReadingStrategy } from '@services/sites';
+import { CoreDomUtils } from '@services/utils/dom';
+import { CoreUtils } from '@services/utils/utils';
+import { makeSingleton, ModalController, Translate } from '@singletons';
+import { AddonModQuizPreflightModalComponent } from '../components/preflight-modal/preflight-modal';
+import { AddonModQuizAccessRuleDelegate } from './access-rules-delegate';
+import {
+    AddonModQuiz,
+    AddonModQuizAttemptWSData,
+    AddonModQuizCombinedReviewOptions,
+    AddonModQuizGetQuizAccessInformationWSResponse,
+    AddonModQuizProvider,
+    AddonModQuizQuizWSData,
+} from './quiz';
+import { AddonModQuizOffline } from './quiz-offline';
+
+/**
+ * Helper service that provides some features for quiz.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizHelperProvider {
+
+    /**
+     * Validate a preflight data or show a modal to input the preflight data if required.
+     * It calls AddonModQuizProvider.startAttempt if a new attempt is needed.
+     *
+     * @param quiz Quiz.
+     * @param accessInfo Quiz access info.
+     * @param preflightData Object where to store the preflight data.
+     * @param attempt Attempt to continue. Don't pass any value if the user needs to start a new attempt.
+     * @param offline Whether the attempt is offline.
+     * @param prefetch Whether user is prefetching.
+     * @param title The title to display in the modal and in the submit button.
+     * @param siteId Site ID. If not defined, current site.
+     * @param retrying Whether we're retrying after a failure.
+     * @return Promise resolved when the preflight data is validated. The resolve param is the attempt.
+     */
+    async getAndCheckPreflightData(
+        quiz: AddonModQuizQuizWSData,
+        accessInfo: AddonModQuizGetQuizAccessInformationWSResponse,
+        preflightData: Record<string, string>,
+        attempt?: AddonModQuizAttemptWSData,
+        offline?: boolean,
+        prefetch?: boolean,
+        title?: string,
+        siteId?: string,
+        retrying?: boolean,
+    ): Promise<AddonModQuizAttemptWSData> {
+
+        const rules = accessInfo?.activerulenames;
+
+        // Check if the user needs to input preflight data.
+        const preflightCheckRequired = await AddonModQuizAccessRuleDelegate.instance.isPreflightCheckRequired(
+            rules,
+            quiz,
+            attempt,
+            prefetch,
+            siteId,
+        );
+
+        if (preflightCheckRequired) {
+            // Preflight check is required. Show a modal with the preflight form.
+            const data = await this.getPreflightData(quiz, accessInfo, attempt, prefetch, title, siteId);
+
+            // Data entered by the user, add it to preflight data and check it again.
+            Object.assign(preflightData, data);
+        }
+
+        // Get some fixed preflight data from access rules (data that doesn't require user interaction).
+        await AddonModQuizAccessRuleDelegate.instance.getFixedPreflightData(rules, quiz, preflightData, attempt, prefetch, siteId);
+
+        try {
+            // All the preflight data is gathered, now validate it.
+            return await this.validatePreflightData(quiz, accessInfo, preflightData, attempt, offline, prefetch, siteId);
+        } catch (error) {
+
+            if (prefetch) {
+                throw error;
+            } else if (retrying && !preflightCheckRequired) {
+                // We're retrying after a failure, but the preflight check wasn't required.
+                // This means there's something wrong with some access rule or user is offline and data isn't cached.
+                // Don't retry again because it would lead to an infinite loop.
+                throw error;
+            }
+
+            // Show error and ask for the preflight again.
+            // Wait to show the error because we want it to be shown over the preflight modal.
+            setTimeout(() => {
+                CoreDomUtils.instance.showErrorModalDefault(error, 'core.error', true);
+            }, 100);
+
+            return this.getAndCheckPreflightData(
+                quiz,
+                accessInfo,
+                preflightData,
+                attempt,
+                offline,
+                prefetch,
+                title,
+                siteId,
+                true,
+            );
+        }
+    }
+
+    /**
+     * Get the preflight data from the user using a modal.
+     *
+     * @param quiz Quiz.
+     * @param accessInfo Quiz access info.
+     * @param attempt The attempt started/continued. If not supplied, user is starting a new attempt.
+     * @param prefetch Whether the user is prefetching the quiz.
+     * @param title The title to display in the modal and in the submit button.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with the preflight data. Rejected if user cancels.
+     */
+    async getPreflightData(
+        quiz: AddonModQuizQuizWSData,
+        accessInfo: AddonModQuizGetQuizAccessInformationWSResponse,
+        attempt?: AddonModQuizAttemptWSData,
+        prefetch?: boolean,
+        title?: string,
+        siteId?: string,
+    ): Promise<Record<string, string>> {
+        const notSupported: string[] = [];
+        const rules = accessInfo?.activerulenames;
+
+        // Check if there is any unsupported rule.
+        rules.forEach((rule) => {
+            if (!AddonModQuizAccessRuleDelegate.instance.isAccessRuleSupported(rule)) {
+                notSupported.push(rule);
+            }
+        });
+
+        if (notSupported.length) {
+            throw new CoreError(
+                Translate.instance.instant('addon.mod_quiz.errorrulesnotsupported') + ' ' + JSON.stringify(notSupported),
+            );
+        }
+
+        // Create and show the modal.
+        const modal = await ModalController.instance.create({
+            component: AddonModQuizPreflightModalComponent,
+            componentProps: {
+                title: title,
+                quiz,
+                attempt,
+                prefetch: !!prefetch,
+                siteId: siteId,
+                rules: rules,
+            },
+        });
+
+        await modal.present();
+
+        const result = await modal.onWillDismiss();
+
+        if (!result.data) {
+            throw new CoreCanceledError();
+        }
+
+        return <Record<string, string>> result.data;
+    }
+
+    /**
+     * Gets the mark string from a question HTML.
+     * Example result: "Marked out of 1.00".
+     *
+     * @param html Question's HTML.
+     * @return Question's mark.
+     */
+    getQuestionMarkFromHtml(html: string): string | undefined {
+        const element = CoreDomUtils.instance.convertToElement(html);
+
+        return CoreDomUtils.instance.getContentsOfElement(element, '.grade');
+    }
+
+    /**
+     * Get a quiz ID by attempt ID.
+     *
+     * @param attemptId Attempt ID.
+     * @param options Other options.
+     * @return Promise resolved with the quiz ID.
+     */
+    async getQuizIdByAttemptId(attemptId: number, options: { cmId?: number; siteId?: string } = {}): Promise<number> {
+        // Use getAttemptReview to retrieve the quiz ID.
+        const reviewData = await AddonModQuiz.instance.getAttemptReview(attemptId, options);
+
+        if (reviewData.attempt.quiz) {
+            return reviewData.attempt.quiz;
+        }
+
+        throw new CoreError('Cannot get quiz ID.');
+    }
+
+    /**
+     * Handle a review link.
+     *
+     * @param attemptId Attempt ID.
+     * @param page Page to load, -1 to all questions in same page.
+     * @param courseId Course ID.
+     * @param quizId Quiz ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async handleReviewLink(attemptId: number, page?: number, courseId?: number, quizId?: number, siteId?: string): Promise<void> {
+        siteId = siteId || CoreSites.instance.getCurrentSiteId();
+
+        const modal = await CoreDomUtils.instance.showModalLoading();
+
+        try {
+            if (!quizId) {
+                quizId = await this.getQuizIdByAttemptId(attemptId, { siteId });
+            }
+
+            const module = await CoreCourse.instance.getModuleBasicInfoByInstance(quizId, 'quiz', siteId);
+
+            courseId = courseId || module.course;
+
+            // Go to the review page.
+            await CoreNavigator.instance.navigateToSitePath(`mod_quiz/${courseId}/${module.id}/review/${attemptId}`, {
+                params: {
+                    page: page == undefined || isNaN(page) ? -1 : page,
+                },
+                siteId,
+            });
+        } catch (error) {
+            CoreDomUtils.instance.showErrorModalDefault(error, 'An error occurred while loading the required data.');
+        } finally {
+            modal.dismiss();
+        }
+    }
+
+    /**
+     * Add some calculated data to the attempt.
+     *
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param highlight Whether we should check if attempt should be highlighted.
+     * @param bestGrade Quiz's best grade (formatted). Required if highlight=true.
+     * @param isLastAttempt Whether the attempt is the last one.
+     * @param siteId Site ID.
+     */
+    async setAttemptCalculatedData(
+        quiz: AddonModQuizQuizData,
+        attempt: AddonModQuizAttemptWSData,
+        highlight?: boolean,
+        bestGrade?: string,
+        isLastAttempt?: boolean,
+        siteId?: string,
+    ): Promise<AddonModQuizAttempt> {
+        const formattedAttempt = <AddonModQuizAttempt> attempt;
+
+        formattedAttempt.rescaledGrade = AddonModQuiz.instance.rescaleGrade(attempt.sumgrades, quiz, false);
+        formattedAttempt.finished = AddonModQuiz.instance.isAttemptFinished(attempt.state);
+        formattedAttempt.readableState = AddonModQuiz.instance.getAttemptReadableState(quiz, attempt);
+
+        if (quiz.showMarkColumn && formattedAttempt.finished) {
+            formattedAttempt.readableMark = AddonModQuiz.instance.formatGrade(attempt.sumgrades, quiz.decimalpoints);
+        } else {
+            formattedAttempt.readableMark = '';
+        }
+
+        if (quiz.showGradeColumn && formattedAttempt.finished) {
+            formattedAttempt.readableGrade = AddonModQuiz.instance.formatGrade(
+                Number(formattedAttempt.rescaledGrade),
+                quiz.decimalpoints,
+            );
+
+            // Highlight the highest grade if appropriate.
+            formattedAttempt.highlightGrade = !!(highlight && !attempt.preview &&
+                attempt.state == AddonModQuizProvider.ATTEMPT_FINISHED && formattedAttempt.readableGrade == bestGrade);
+        } else {
+            formattedAttempt.readableGrade = '';
+        }
+
+        if (isLastAttempt || isLastAttempt === undefined) {
+            formattedAttempt.finishedOffline = await AddonModQuiz.instance.isAttemptFinishedOffline(attempt.id, siteId);
+        }
+
+        return formattedAttempt;
+    }
+
+    /**
+     * Add some calculated data to the quiz.
+     *
+     * @param quiz Quiz.
+     * @param options Review options.
+     */
+    setQuizCalculatedData(quiz: AddonModQuizQuizWSData, options: AddonModQuizCombinedReviewOptions): AddonModQuizQuizData {
+        const formattedQuiz = <AddonModQuizQuizData> quiz;
+
+        formattedQuiz.sumGradesFormatted = AddonModQuiz.instance.formatGrade(quiz.sumgrades, quiz.decimalpoints);
+        formattedQuiz.gradeFormatted = AddonModQuiz.instance.formatGrade(quiz.grade, quiz.decimalpoints);
+
+        formattedQuiz.showAttemptColumn = quiz.attempts != 1;
+        formattedQuiz.showGradeColumn = options.someoptions.marks >= AddonModQuizProvider.QUESTION_OPTIONS_MARK_AND_MAX &&
+            AddonModQuiz.instance.quizHasGrades(quiz);
+        formattedQuiz.showMarkColumn = formattedQuiz.showGradeColumn && quiz.grade != quiz.sumgrades;
+        formattedQuiz.showFeedbackColumn = !!quiz.hasfeedback && !!options.alloptions.overallfeedback;
+
+        return formattedQuiz;
+    }
+
+    /**
+     * Validate the preflight data. It calls AddonModQuizProvider.startAttempt if a new attempt is needed.
+     *
+     * @param quiz Quiz.
+     * @param accessInfo Quiz access info.
+     * @param preflightData Object where to store the preflight data.
+     * @param attempt Attempt to continue. Don't pass any value if the user needs to start a new attempt.
+     * @param offline Whether the attempt is offline.
+     * @param sent Whether preflight data has been entered by the user.
+     * @param prefetch Whether user is prefetching.
+     * @param title The title to display in the modal and in the submit button.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when the preflight data is validated.
+     */
+    async validatePreflightData(
+        quiz: AddonModQuizQuizWSData,
+        accessInfo: AddonModQuizGetQuizAccessInformationWSResponse,
+        preflightData: Record<string, string>,
+        attempt?: AddonModQuizAttempt,
+        offline?: boolean,
+        prefetch?: boolean,
+        siteId?: string,
+    ): Promise<AddonModQuizAttempt> {
+
+        const rules = accessInfo.activerulenames;
+        const modOptions = {
+            cmId: quiz.coursemodule,
+            readingStrategy: offline ? CoreSitesReadingStrategy.PreferCache : CoreSitesReadingStrategy.OnlyNetwork,
+            siteId,
+        };
+
+        try {
+            if (attempt) {
+                if (attempt.state != AddonModQuizProvider.ATTEMPT_OVERDUE && !attempt.finishedOffline) {
+                    // We're continuing an attempt. Call getAttemptData to validate the preflight data.
+                    await AddonModQuiz.instance.getAttemptData(attempt.id, attempt.currentpage!, preflightData, modOptions);
+
+                    if (offline) {
+                        // Get current page stored in local.
+                        const storedAttempt = await CoreUtils.instance.ignoreErrors(
+                            AddonModQuizOffline.instance.getAttemptById(attempt.id),
+                        );
+
+                        attempt.currentpage = storedAttempt?.currentpage ?? attempt.currentpage;
+                    }
+                } else {
+                    // Attempt is overdue or finished in offline, we can only see the summary.
+                    // Call getAttemptSummary to validate the preflight data.
+                    await AddonModQuiz.instance.getAttemptSummary(attempt.id, preflightData, modOptions);
+                }
+            } else {
+                // We're starting a new attempt, call startAttempt.
+                attempt = await AddonModQuiz.instance.startAttempt(quiz.id, preflightData, false, siteId);
+            }
+
+            // Preflight data validated.
+            AddonModQuizAccessRuleDelegate.instance.notifyPreflightCheckPassed(
+                rules,
+                quiz,
+                attempt,
+                preflightData,
+                prefetch,
+                siteId,
+            );
+
+            return attempt;
+        } catch (error) {
+            if (CoreUtils.instance.isWebServiceError(error)) {
+                // The WebService returned an error, assume the preflight failed.
+                AddonModQuizAccessRuleDelegate.instance.notifyPreflightCheckFailed(
+                    rules,
+                    quiz,
+                    attempt,
+                    preflightData,
+                    prefetch,
+                    siteId,
+                );
+            }
+
+            throw error;
+        }
+    }
+
+}
+
+export class AddonModQuizHelper extends makeSingleton(AddonModQuizHelperProvider) {}
+
+/**
+ * Quiz data with calculated data.
+ */
+export type AddonModQuizQuizData = AddonModQuizQuizWSData & {
+    sumGradesFormatted?: string;
+    gradeFormatted?: string;
+    showAttemptColumn?: boolean;
+    showGradeColumn?: boolean;
+    showMarkColumn?: boolean;
+    showFeedbackColumn?: boolean;
+};
+
+/**
+ * Attempt data with calculated data.
+ */
+export type AddonModQuizAttempt = AddonModQuizAttemptWSData & {
+    finishedOffline?: boolean;
+    rescaledGrade?: string;
+    finished?: boolean;
+    readableState?: string[];
+    readableMark?: string;
+    readableGrade?: string;
+    highlightGrade?: boolean;
+};

src/addons/mod/quiz/services/quiz-offline.ts

@@ -0,0 +1,372 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreQuestionBehaviourDelegate, CoreQuestionQuestionWithAnswers } from '@features/question/services/behaviour-delegate';
+import { CoreQuestionAnswerDBRecord } from '@features/question/services/database/question';
+import { CoreQuestion, CoreQuestionQuestionParsed, CoreQuestionsAnswers } from '@features/question/services/question';
+import { CoreSites } from '@services/sites';
+import { CoreTimeUtils } from '@services/utils/time';
+import { CoreUtils } from '@services/utils/utils';
+import { makeSingleton, Translate } from '@singletons';
+import { CoreLogger } from '@singletons/logger';
+import { AddonModQuizAttemptDBRecord, ATTEMPTS_TABLE_NAME } from './database/quiz';
+import { AddonModQuizAttemptWSData, AddonModQuizProvider, AddonModQuizQuizWSData } from './quiz';
+
+/**
+ * Service to handle offline quiz.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizOfflineProvider {
+
+    protected logger: CoreLogger;
+
+    constructor() {
+        this.logger = CoreLogger.getInstance('AddonModQuizOfflineProvider');
+    }
+
+    /**
+     * Classify the answers in questions.
+     *
+     * @param answers List of answers.
+     * @return Object with the questions, the keys are the slot. Each question contains its answers.
+     */
+    classifyAnswersInQuestions(answers: CoreQuestionsAnswers): AddonModQuizQuestionsWithAnswers {
+        const questionsWithAnswers: AddonModQuizQuestionsWithAnswers = {};
+
+        // Classify the answers in each question.
+        for (const name in answers) {
+            const slot = CoreQuestion.instance.getQuestionSlotFromName(name);
+            const nameWithoutPrefix = CoreQuestion.instance.removeQuestionPrefix(name);
+
+            if (!questionsWithAnswers[slot]) {
+                questionsWithAnswers[slot] = {
+                    answers: {},
+                    prefix: name.substr(0, name.indexOf(nameWithoutPrefix)),
+                };
+            }
+            questionsWithAnswers[slot].answers[nameWithoutPrefix] = answers[name];
+        }
+
+        return questionsWithAnswers;
+    }
+
+    /**
+     * Given a list of questions with answers classified in it, returns a list of answers (including prefix in the name).
+     *
+     * @param questions Questions.
+     * @return Answers.
+     */
+    extractAnswersFromQuestions(questions: AddonModQuizQuestionsWithAnswers): CoreQuestionsAnswers {
+        const answers: CoreQuestionsAnswers = {};
+
+        for (const slot in questions) {
+            const question = questions[slot];
+
+            for (const name in question.answers) {
+                answers[question.prefix + name] = question.answers[name];
+            }
+        }
+
+        return answers;
+    }
+
+    /**
+     * Get all the offline attempts in a certain site.
+     *
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with the offline attempts.
+     */
+    async getAllAttempts(siteId?: string): Promise<AddonModQuizAttemptDBRecord[]> {
+        const db = await CoreSites.instance.getSiteDb(siteId);
+
+        return db.getAllRecords(ATTEMPTS_TABLE_NAME);
+    }
+
+    /**
+     * Retrieve an attempt answers from site DB.
+     *
+     * @param attemptId Attempt ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with the answers.
+     */
+    getAttemptAnswers(attemptId: number, siteId?: string): Promise<CoreQuestionAnswerDBRecord[]> {
+        return CoreQuestion.instance.getAttemptAnswers(AddonModQuizProvider.COMPONENT, attemptId, siteId);
+    }
+
+    /**
+     * Retrieve an attempt from site DB.
+     *
+     * @param attemptId Attempt ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with the attempt.
+     */
+    async getAttemptById(attemptId: number, siteId?: string): Promise<AddonModQuizAttemptDBRecord> {
+        const db = await CoreSites.instance.getSiteDb(siteId);
+
+        return db.getRecord(ATTEMPTS_TABLE_NAME, { id: attemptId });
+    }
+
+    /**
+     * Retrieve an attempt from site DB.
+     *
+     * @param attemptId Attempt ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @param userId User ID. If not defined, user current site's user.
+     * @return Promise resolved with the attempts.
+     */
+    async getQuizAttempts(quizId: number, siteId?: string, userId?: number): Promise<AddonModQuizAttemptDBRecord[]> {
+        const site = await CoreSites.instance.getSite(siteId);
+
+        return site.getDb().getRecords(ATTEMPTS_TABLE_NAME, { quizid: quizId, userid: userId || site.getUserId() });
+    }
+
+    /**
+     * Load local state in the questions.
+     *
+     * @param attemptId Attempt ID.
+     * @param questions List of questions.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async loadQuestionsLocalStates(
+        attemptId: number,
+        questions: CoreQuestionQuestionParsed[],
+        siteId?: string,
+    ): Promise<CoreQuestionQuestionParsed[]> {
+
+        await Promise.all(questions.map(async (question) => {
+            const dbQuestion = await CoreUtils.instance.ignoreErrors(
+                CoreQuestion.instance.getQuestion(AddonModQuizProvider.COMPONENT, attemptId, question.slot, siteId),
+            );
+
+            if (!dbQuestion) {
+                // Question not found.
+                return;
+            }
+
+            const state = CoreQuestion.instance.getState(dbQuestion.state);
+            question.state = dbQuestion.state;
+            question.status = Translate.instance.instant('core.question.' + state.status);
+        }));
+
+        return questions;
+    }
+
+    /**
+     * Process an attempt, saving its data.
+     *
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param questions Object with the questions of the quiz. The keys should be the question slot.
+     * @param data Data to save.
+     * @param finish Whether to finish the quiz.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved in success, rejected otherwise.
+     */
+    async processAttempt(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData,
+        questions: Record<number, CoreQuestionQuestionParsed>,
+        data: CoreQuestionsAnswers,
+        finish?: boolean,
+        siteId?: string,
+    ): Promise<void> {
+        siteId = siteId || CoreSites.instance.getCurrentSiteId();
+        const now = CoreTimeUtils.instance.timestamp();
+
+        const db = await CoreSites.instance.getSiteDb(siteId);
+
+        // Check if an attempt already exists. Return a new one if it doesn't.
+        let entry = await CoreUtils.instance.ignoreErrors(this.getAttemptById(attempt.id, siteId));
+
+        if (entry) {
+            entry.timemodified = now;
+            entry.finished = finish ? 1 : 0;
+        } else {
+            entry = {
+                quizid: quiz.id,
+                userid: attempt.userid!,
+                id: attempt.id,
+                courseid: quiz.course,
+                timecreated: now,
+                attempt: attempt.attempt!,
+                currentpage: attempt.currentpage,
+                timemodified: now,
+                finished: finish ? 1 : 0,
+            };
+        }
+
+        // Save attempt in DB.
+        await db.insertRecord(ATTEMPTS_TABLE_NAME, entry);
+
+        // Attempt has been saved, now we need to save the answers.
+        await this.saveAnswers(quiz, attempt, questions, data, now, siteId);
+    }
+
+    /**
+     * Remove an attempt and its answers from local DB.
+     *
+     * @param attemptId Attempt ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async removeAttemptAndAnswers(attemptId: number, siteId?: string): Promise<void> {
+        siteId = siteId || CoreSites.instance.getCurrentSiteId();
+
+        const db = await CoreSites.instance.getSiteDb(siteId);
+
+        await Promise.all([
+            CoreQuestion.instance.removeAttemptAnswers(AddonModQuizProvider.COMPONENT, attemptId, siteId),
+            CoreQuestion.instance.removeAttemptQuestions(AddonModQuizProvider.COMPONENT, attemptId, siteId),
+            db.deleteRecords(ATTEMPTS_TABLE_NAME, { id: attemptId }),
+        ]);
+    }
+
+    /**
+     * Remove a question and its answers from local DB.
+     *
+     * @param attemptId Attempt ID.
+     * @param slot Question slot.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when finished.
+     */
+    async removeQuestionAndAnswers(attemptId: number, slot: number, siteId?: string): Promise<void> {
+        siteId = siteId || CoreSites.instance.getCurrentSiteId();
+
+        await Promise.all([
+            CoreQuestion.instance.removeQuestion(AddonModQuizProvider.COMPONENT, attemptId, slot, siteId),
+            CoreQuestion.instance.removeQuestionAnswers(AddonModQuizProvider.COMPONENT, attemptId, slot, siteId),
+        ]);
+    }
+
+    /**
+     * Save an attempt's answers and calculate state for questions modified.
+     *
+     * @param quiz Quiz.
+     * @param attempt Attempt.
+     * @param questions Object with the questions of the quiz. The keys should be the question slot.
+     * @param answers Answers to save.
+     * @param timeMod Time modified to set in the answers. If not defined, current time.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async saveAnswers(
+        quiz: AddonModQuizQuizWSData,
+        attempt: AddonModQuizAttemptWSData,
+        questions: Record<number, CoreQuestionQuestionParsed>,
+        answers: CoreQuestionsAnswers,
+        timeMod?: number,
+        siteId?: string,
+    ): Promise<void> {
+        siteId = siteId || CoreSites.instance.getCurrentSiteId();
+        timeMod = timeMod || CoreTimeUtils.instance.timestamp();
+
+        const questionsWithAnswers: Record<number, CoreQuestionQuestionWithAnswers> = {};
+        const newStates: Record<number, string> = {};
+
+        // Classify the answers in each question.
+        for (const name in answers) {
+            const slot = CoreQuestion.instance.getQuestionSlotFromName(name);
+            const nameWithoutPrefix = CoreQuestion.instance.removeQuestionPrefix(name);
+
+            if (questions[slot]) {
+                if (!questionsWithAnswers[slot]) {
+                    questionsWithAnswers[slot] = questions[slot];
+                    questionsWithAnswers[slot].answers = {};
+                }
+                questionsWithAnswers[slot].answers![nameWithoutPrefix] = answers[name];
+            }
+        }
+
+        // First determine the new state of each question. We won't save the new state yet.
+        await Promise.all(Object.values(questionsWithAnswers).map(async (question) => {
+
+            const state = await CoreQuestionBehaviourDelegate.instance.determineNewState(
+                quiz.preferredbehaviour!,
+                AddonModQuizProvider.COMPONENT,
+                attempt.id,
+                question,
+                quiz.coursemodule,
+                siteId,
+            );
+
+            // Check if state has changed.
+            if (state && state.name != question.state) {
+                newStates[question.slot] = state.name;
+            }
+
+            // Delete previously stored answers for this question.
+            await CoreQuestion.instance.removeQuestionAnswers(AddonModQuizProvider.COMPONENT, attempt.id, question.slot, siteId);
+        }));
+
+        // Now save the answers.
+        await CoreQuestion.instance.saveAnswers(
+            AddonModQuizProvider.COMPONENT,
+            quiz.id,
+            attempt.id,
+            attempt.userid!,
+            answers,
+            timeMod,
+            siteId,
+        );
+
+        try {
+            // Answers have been saved, now we can save the questions with the states.
+            await CoreUtils.instance.allPromises(Object.keys(newStates).map(async (slot) => {
+                const question = questionsWithAnswers[Number(slot)];
+
+                await CoreQuestion.instance.saveQuestion(
+                    AddonModQuizProvider.COMPONENT,
+                    quiz.id,
+                    attempt.id,
+                    attempt.userid!,
+                    question,
+                    newStates[slot],
+                    siteId,
+                );
+            }));
+        } catch (error) {
+            // Ignore errors when saving question state.
+            this.logger.error('Error saving question state', error);
+        }
+
+    }
+
+    /**
+     * Set attempt's current page.
+     *
+     * @param attemptId Attempt ID.
+     * @param page Page to set.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved in success, rejected otherwise.
+     */
+    async setAttemptCurrentPage(attemptId: number, page: number, siteId?: string): Promise<void> {
+        const db = await CoreSites.instance.getSiteDb(siteId);
+
+        await db.updateRecords(ATTEMPTS_TABLE_NAME, { currentpage: page }, { id: attemptId });
+    }
+
+}
+
+export class AddonModQuizOffline extends makeSingleton(AddonModQuizOfflineProvider) {}
+
+/**
+ * Answers classified by question slot.
+ */
+export type AddonModQuizQuestionsWithAnswers = Record<number, {
+    prefix: string;
+    answers: CoreQuestionsAnswers;
+}>;

src/addons/mod/quiz/services/quiz-sync.ts

@@ -0,0 +1,513 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreError } from '@classes/errors/error';
+import { CoreCourseActivitySyncBaseProvider } from '@features/course/classes/activity-sync';
+import { CoreCourse, CoreCourseAnyModuleData } from '@features/course/services/course';
+import { CoreCourseLogHelper } from '@features/course/services/log-helper';
+import { CoreCourseModulePrefetchDelegate } from '@features/course/services/module-prefetch-delegate';
+import { CoreQuestion, CoreQuestionQuestionParsed } from '@features/question/services/question';
+import { CoreQuestionDelegate } from '@features/question/services/question-delegate';
+import { CoreApp } from '@services/app';
+import { CoreSites, CoreSitesReadingStrategy } from '@services/sites';
+import { CoreSync } from '@services/sync';
+import { CoreUtils } from '@services/utils/utils';
+import { makeSingleton, Translate } from '@singletons';
+import { CoreEvents, CoreEventSiteData } from '@singletons/events';
+import { AddonModQuizAttemptDBRecord } from './database/quiz';
+import { AddonModQuizPrefetchHandler } from './handlers/prefetch';
+import { AddonModQuiz, AddonModQuizAttemptWSData, AddonModQuizProvider, AddonModQuizQuizWSData } from './quiz';
+import { AddonModQuizOffline, AddonModQuizQuestionsWithAnswers } from './quiz-offline';
+
+/**
+ * Service to sync quizzes.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonModQuizSyncProvider extends CoreCourseActivitySyncBaseProvider<AddonModQuizSyncResult> {
+
+    static readonly AUTO_SYNCED = 'addon_mod_quiz_autom_synced';
+
+    protected componentTranslate?: string;
+
+    constructor() {
+        super('AddonModQuizSyncProvider');
+    }
+
+    /**
+     * Finish a sync process: remove offline data if needed, prefetch quiz data, set sync time and return the result.
+     *
+     * @param siteId Site ID.
+     * @param quiz Quiz.
+     * @param courseId Course ID.
+     * @param warnings List of warnings generated by the sync.
+     * @param options Other options.
+     * @return Promise resolved on success.
+     */
+    protected async finishSync(
+        siteId: string,
+        quiz: AddonModQuizQuizWSData,
+        courseId: number,
+        warnings: string[],
+        options?: FinishSyncOptions,
+    ): Promise<AddonModQuizSyncResult> {
+        options = options || {};
+
+        // Invalidate the data for the quiz and attempt.
+        await CoreUtils.instance.ignoreErrors(
+            AddonModQuiz.instance.invalidateAllQuizData(quiz.id, courseId, options.attemptId, siteId),
+        );
+
+        if (options.removeAttempt && options.attemptId) {
+            const promises: Promise<unknown>[] = [];
+
+            promises.push(AddonModQuizOffline.instance.removeAttemptAndAnswers(options.attemptId, siteId));
+
+            if (options.onlineQuestions) {
+                for (const slot in options.onlineQuestions) {
+                    promises.push(CoreQuestionDelegate.instance.deleteOfflineData(
+                        options.onlineQuestions[slot],
+                        AddonModQuizProvider.COMPONENT,
+                        quiz.coursemodule,
+                        siteId,
+                    ));
+                }
+            }
+
+            await Promise.all(promises);
+        }
+
+        if (options.updated) {
+            try {
+                // Data has been sent. Update prefetched data.
+                const module = await CoreCourse.instance.getModuleBasicInfoByInstance(quiz.id, 'quiz', siteId);
+
+                await this.prefetchAfterUpdateQuiz(module, quiz, courseId, undefined, siteId);
+            } catch {
+                // Ignore errors.
+            }
+        }
+
+        await CoreUtils.instance.ignoreErrors(this.setSyncTime(quiz.id, siteId));
+
+        // Check if online attempt was finished because of the sync.
+        let attemptFinished = false;
+        if (options.onlineAttempt && !AddonModQuiz.instance.isAttemptFinished(options.onlineAttempt.state)) {
+            // Attempt wasn't finished at start. Check if it's finished now.
+            const attempts = await AddonModQuiz.instance.getUserAttempts(quiz.id, { cmId: quiz.coursemodule, siteId });
+
+            const attempt = attempts.find(attempt => attempt.id == options?.onlineAttempt?.id);
+
+            attemptFinished = attempt ? AddonModQuiz.instance.isAttemptFinished(attempt.state) : false;
+        }
+
+        return { warnings, attemptFinished, updated: !!options.updated || !!options.removeAttempt };
+    }
+
+    /**
+     * Check if a quiz has data to synchronize.
+     *
+     * @param quizId Quiz ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with boolean: whether it has data to sync.
+     */
+    async hasDataToSync(quizId: number, siteId?: string): Promise<boolean> {
+        try {
+            const attempts = await AddonModQuizOffline.instance.getQuizAttempts(quizId, siteId);
+
+            return !!attempts.length;
+        } catch {
+            return false;
+        }
+    }
+
+    /**
+     * Conveniece function to prefetch data after an update.
+     *
+     * @param module Module.
+     * @param quiz Quiz.
+     * @param courseId Course ID.
+     * @param regex If regex matches, don't download the data. Defaults to check files.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when done.
+     */
+    async prefetchAfterUpdateQuiz(
+        module: CoreCourseAnyModuleData,
+        quiz: AddonModQuizQuizWSData,
+        courseId: number,
+        regex?: RegExp,
+        siteId?: string,
+    ): Promise<void> {
+        regex = regex || /^.*files$/;
+
+        let shouldDownload = false;
+
+        // Get the module updates to check if the data was updated or not.
+        const result = await CoreCourseModulePrefetchDelegate.instance.getModuleUpdates(module, courseId, true, siteId);
+
+        if (result?.updates?.length) {
+            // Only prefetch if files haven't changed.
+            shouldDownload = !result.updates.find((entry) => entry.name.match(regex!));
+
+            if (shouldDownload) {
+                await AddonModQuizPrefetchHandler.instance.download(module, courseId, undefined, false, false);
+            }
+        }
+
+        // Prefetch finished or not needed, set the right status.
+        await AddonModQuizPrefetchHandler.instance.setStatusAfterPrefetch(quiz, {
+            cmId: module.id,
+            readingStrategy: shouldDownload ? CoreSitesReadingStrategy.PreferCache : undefined,
+            siteId,
+        });
+    }
+
+    /**
+     * Try to synchronize all the quizzes in a certain site or in all sites.
+     *
+     * @param siteId Site ID to sync. If not defined, sync all sites.
+     * @param force Wether to force sync not depending on last execution.
+     * @return Promise resolved if sync is successful, rejected if sync fails.
+     */
+    syncAllQuizzes(siteId?: string, force?: boolean): Promise<void> {
+        return this.syncOnSites('all quizzes', this.syncAllQuizzesFunc.bind(this, !!force), siteId);
+    }
+
+    /**
+     * Sync all quizzes on a site.
+     *
+     * @param siteId Site ID to sync.
+     * @param force Wether to force sync not depending on last execution.
+     * @param Promise resolved if sync is successful, rejected if sync fails.
+     */
+    protected async syncAllQuizzesFunc(siteId: string, force: boolean): Promise<void> {
+        // Get all offline attempts.
+        const attempts = await AddonModQuizOffline.instance.getAllAttempts(siteId);
+
+        const quizIds: Record<number, boolean> = {}; // To prevent duplicates.
+
+        // Sync all quizzes that haven't been synced for a while and that aren't attempted right now.
+        await Promise.all(attempts.map(async (attempt) => {
+            if (quizIds[attempt.quizid]) {
+                // Quiz already treated.
+                return;
+            }
+            quizIds[attempt.quizid] = true;
+
+            if (CoreSync.instance.isBlocked(AddonModQuizProvider.COMPONENT, attempt.quizid, siteId)) {
+                return;
+            }
+
+            // Quiz not blocked, try to synchronize it.
+            const quiz = await AddonModQuiz.instance.getQuizById(attempt.courseid, attempt.quizid, { siteId });
+
+            const data = await (force ? this.syncQuiz(quiz, false, siteId) : this.syncQuizIfNeeded(quiz, false, siteId));
+
+            if (data?.warnings?.length) {
+                // Store the warnings to show them when the user opens the quiz.
+                await this.setSyncWarnings(quiz.id, data.warnings, siteId);
+            }
+
+            if (data) {
+                // Sync successful. Send event.
+                CoreEvents.trigger<AddonModQuizAutoSyncData>(AddonModQuizSyncProvider.AUTO_SYNCED, {
+                    quizId: quiz.id,
+                    attemptFinished: data.attemptFinished,
+                    warnings: data.warnings,
+                }, siteId);
+            }
+        }));
+    }
+
+    /**
+     * Sync a quiz only if a certain time has passed since the last time.
+     *
+     * @param quiz Quiz.
+     * @param askPreflight Whether we should ask for preflight data if needed.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved when the quiz is synced or if it doesn't need to be synced.
+     */
+    async syncQuizIfNeeded(
+        quiz: AddonModQuizQuizWSData,
+        askPreflight?: boolean,
+        siteId?: string,
+    ): Promise<AddonModQuizSyncResult | undefined> {
+        const needed = await this.isSyncNeeded(quiz.id, siteId);
+
+        if (needed) {
+            return this.syncQuiz(quiz, askPreflight, siteId);
+        }
+    }
+
+    /**
+     * Try to synchronize a quiz.
+     * The promise returned will be resolved with an array with warnings if the synchronization is successful.
+     *
+     * @param quiz Quiz.
+     * @param askPreflight Whether we should ask for preflight data if needed.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved in success.
+     */
+    syncQuiz(quiz: AddonModQuizQuizWSData, askPreflight?: boolean, siteId?: string): Promise<AddonModQuizSyncResult> {
+        siteId = siteId || CoreSites.instance.getCurrentSiteId();
+
+        if (this.isSyncing(quiz.id, siteId)) {
+            // There's already a sync ongoing for this quiz, return the promise.
+            return this.getOngoingSync(quiz.id, siteId)!;
+        }
+
+        // Verify that quiz isn't blocked.
+        if (CoreSync.instance.isBlocked(AddonModQuizProvider.COMPONENT, quiz.id, siteId)) {
+            this.logger.debug('Cannot sync quiz ' + quiz.id + ' because it is blocked.');
+            this.componentTranslate = this.componentTranslate || CoreCourse.instance.translateModuleName('quiz');
+
+            throw new CoreError(Translate.instance.instant('core.errorsyncblocked', { $a: this.componentTranslate }));
+        }
+
+        return this.addOngoingSync(quiz.id, this.performSyncQuiz(quiz, askPreflight, siteId), siteId);
+    }
+
+    /**
+     * Perform the quiz sync.
+     *
+     * @param quiz Quiz.
+     * @param askPreflight Whether we should ask for preflight data if needed.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved in success.
+     */
+    async performSyncQuiz(quiz: AddonModQuizQuizWSData, askPreflight?: boolean, siteId?: string): Promise<AddonModQuizSyncResult> {
+        siteId = siteId || CoreSites.instance.getCurrentSiteId();
+
+        const warnings: string[] = [];
+        const courseId = quiz.course;
+        const modOptions = {
+            cmId: quiz.coursemodule,
+            readingStrategy: CoreSitesReadingStrategy.OnlyNetwork,
+            siteId,
+        };
+
+        this.logger.debug('Try to sync quiz ' + quiz.id + ' in site ' + siteId);
+
+        // Sync offline logs.
+        await CoreUtils.instance.ignoreErrors(
+            CoreCourseLogHelper.instance.syncActivity(AddonModQuizProvider.COMPONENT, quiz.id, siteId),
+        );
+
+        // Get all the offline attempts for the quiz. It should always be 0 or 1 attempt
+        const offlineAttempts = await AddonModQuizOffline.instance.getQuizAttempts(quiz.id, siteId);
+
+        if (!offlineAttempts.length) {
+            // Nothing to sync, finish.
+            return this.finishSync(siteId, quiz, courseId, warnings);
+        }
+
+        if (!CoreApp.instance.isOnline()) {
+            // Cannot sync in offline.
+            throw new CoreError(Translate.instance.instant('core.cannotconnect'));
+        }
+
+        const offlineAttempt = offlineAttempts.pop()!;
+
+        // Now get the list of online attempts to make sure this attempt exists and isn't finished.
+        const onlineAttempts = await AddonModQuiz.instance.getUserAttempts(quiz.id, modOptions);
+
+        const lastAttemptId = onlineAttempts.length ? onlineAttempts[onlineAttempts.length - 1].id : undefined;
+        const onlineAttempt = onlineAttempts.find((attempt) => attempt.id == offlineAttempt.id);
+
+        if (!onlineAttempt || AddonModQuiz.instance.isAttemptFinished(onlineAttempt.state)) {
+            // Attempt not found or it's finished in online. Discard it.
+            warnings.push(Translate.instance.instant('addon.mod_quiz.warningattemptfinished'));
+
+            return this.finishSync(siteId, quiz, courseId, warnings, {
+                attemptId: offlineAttempt.id,
+                offlineAttempt,
+                onlineAttempt,
+                removeAttempt: true,
+            });
+        }
+
+        // Get the data stored in offline.
+        const answersList = await AddonModQuizOffline.instance.getAttemptAnswers(offlineAttempt.id, siteId);
+
+        if (!answersList.length) {
+            // No answers stored, finish.
+            return this.finishSync(siteId, quiz, courseId, warnings, {
+                attemptId: lastAttemptId,
+                offlineAttempt,
+                onlineAttempt,
+                removeAttempt: true,
+            });
+        }
+
+        const offlineAnswers = CoreQuestion.instance.convertAnswersArrayToObject(answersList);
+        const offlineQuestions = AddonModQuizOffline.instance.classifyAnswersInQuestions(offlineAnswers);
+
+        // We're going to need preflightData, get it.
+        const info = await AddonModQuiz.instance.getQuizAccessInformation(quiz.id, modOptions);
+
+        const preflightData = await AddonModQuizPrefetchHandler.instance.getPreflightData(
+            quiz,
+            info,
+            onlineAttempt,
+            askPreflight,
+            'core.settings.synchronization',
+            siteId,
+        );
+
+        // Now get the online questions data.
+        const onlineQuestions = await AddonModQuiz.instance.getAllQuestionsData(quiz, onlineAttempt, preflightData, {
+            pages: AddonModQuiz.instance.getPagesFromLayoutAndQuestions(onlineAttempt.layout || '', offlineQuestions),
+            readingStrategy: CoreSitesReadingStrategy.OnlyNetwork,
+            siteId,
+        });
+
+        // Validate questions, discarding the offline answers that can't be synchronized.
+        const discardedData = await this.validateQuestions(onlineAttempt.id, onlineQuestions, offlineQuestions, siteId);
+
+        // Let questions prepare the data to send.
+        await Promise.all(Object.keys(offlineQuestions).map(async (slotString) => {
+            const slot = Number(slotString);
+            const onlineQuestion = onlineQuestions[slot];
+
+            await CoreQuestionDelegate.instance.prepareSyncData(
+                onlineQuestion,
+                offlineQuestions[slot].answers,
+                AddonModQuizProvider.COMPONENT,
+                quiz.coursemodule,
+                siteId,
+            );
+        }));
+
+        // Get the answers to send.
+        const answers = AddonModQuizOffline.instance.extractAnswersFromQuestions(offlineQuestions);
+        const finish = !!offlineAttempt.finished && !discardedData;
+
+        if (discardedData) {
+            if (offlineAttempt.finished) {
+                warnings.push(Translate.instance.instant('addon.mod_quiz.warningdatadiscardedfromfinished'));
+            } else {
+                warnings.push(Translate.instance.instant('addon.mod_quiz.warningdatadiscarded'));
+            }
+        }
+
+        // Send the answers.
+        await AddonModQuiz.instance.processAttempt(quiz, onlineAttempt, answers, preflightData, finish, false, false, siteId);
+
+        if (!finish) {
+            // Answers sent, now set the current page.
+            // Don't pass the quiz instance because we don't want to trigger a Firebase event in this case.
+            await CoreUtils.instance.ignoreErrors(AddonModQuiz.instance.logViewAttempt(
+                onlineAttempt.id,
+                offlineAttempt.currentpage,
+                preflightData,
+                false,
+                undefined,
+                siteId,
+            ));
+        }
+
+        // Data sent. Finish the sync.
+        return this.finishSync(siteId, quiz, courseId, warnings, {
+            attemptId: lastAttemptId,
+            offlineAttempt,
+            onlineAttempt,
+            removeAttempt: true,
+            updated: true,
+            onlineQuestions,
+        });
+    }
+
+    /**
+     * Validate questions, discarding the offline answers that can't be synchronized.
+     *
+     * @param attemptId Attempt ID.
+     * @param onlineQuestions Online questions
+     * @param offlineQuestions Offline questions.
+     * @param siteId Site ID. If not defined, current site.
+     * @return Promise resolved with boolean: true if some offline data was discarded, false otherwise.
+     */
+    async validateQuestions(
+        attemptId: number,
+        onlineQuestions: Record<number, CoreQuestionQuestionParsed>,
+        offlineQuestions: AddonModQuizQuestionsWithAnswers,
+        siteId?: string,
+    ): Promise<boolean> {
+        let discardedData = false;
+
+        await Promise.all(Object.keys(offlineQuestions).map(async (slotString) => {
+            const slot = Number(slotString);
+            const offlineQuestion = offlineQuestions[slot];
+            const onlineQuestion = onlineQuestions[slot];
+            const offlineSequenceCheck = <string> offlineQuestion.answers[':sequencecheck'];
+
+            if (onlineQuestion) {
+                // We found the online data for the question, validate that the sequence check is ok.
+                if (!CoreQuestionDelegate.instance.validateSequenceCheck(onlineQuestion, offlineSequenceCheck)) {
+                    // Sequence check is not valid, remove the offline data.
+                    await AddonModQuizOffline.instance.removeQuestionAndAnswers(attemptId, slot, siteId);
+
+                    discardedData = true;
+                    delete offlineQuestions[slot];
+                } else {
+                    // Sequence check is valid. Use the online one to prevent synchronization errors.
+                    offlineQuestion.answers[':sequencecheck'] = String(onlineQuestion.sequencecheck);
+                }
+            } else {
+                // Online question not found, it can happen for 2 reasons:
+                // 1- It's a sequential quiz and the question is in a page already passed.
+                // 2- Quiz layout has changed (shouldn't happen since it's blocked if there are attempts).
+                await AddonModQuizOffline.instance.removeQuestionAndAnswers(attemptId, slot, siteId);
+
+                discardedData = true;
+                delete offlineQuestions[slot];
+            }
+        }));
+
+        return discardedData;
+    }
+
+}
+
+export class AddonModQuizSync extends makeSingleton(AddonModQuizSyncProvider) {}
+
+/**
+ * Data returned by a quiz sync.
+ */
+export type AddonModQuizSyncResult = {
+    warnings: string[]; // List of warnings.
+    attemptFinished: boolean; // Whether an attempt was finished in the site due to the sync.
+    updated: boolean;
+};
+
+/**
+ * Options to pass to finish sync.
+ */
+type FinishSyncOptions = {
+    attemptId?: number; // Last attempt ID.
+    offlineAttempt?: AddonModQuizAttemptDBRecord; // Offline attempt synchronized, if any.
+    onlineAttempt?: AddonModQuizAttemptWSData; // Online data for the offline attempt.
+    removeAttempt?: boolean; // Whether the offline data should be removed.
+    updated?: boolean; // Whether the offline data should be removed.
+    onlineQuestions?: Record<number, CoreQuestionQuestionParsed>; // Online questions indexed by slot.
+};
+
+/**
+ * Data passed to AUTO_SYNCED event.
+ */
+export type AddonModQuizAutoSyncData = CoreEventSiteData & {
+    quizId: number;
+    attemptFinished: boolean;
+    warnings: string[];
+};

src/addons/qbehaviour/adaptive/adaptive.module.ts

@@ -0,0 +1,33 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+import { CoreQuestionBehaviourDelegate } from '@features/question/services/behaviour-delegate';
+import { AddonQbehaviourAdaptiveHandler } from './services/handlers/adaptive';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                CoreQuestionBehaviourDelegate.instance.registerHandler(AddonQbehaviourAdaptiveHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonQbehaviourAdaptiveModule {}

src/addons/qbehaviour/adaptive/services/handlers/adaptive.ts

@@ -0,0 +1,56 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreQuestionBehaviourHandler } from '@features/question/services/behaviour-delegate';
+import { CoreQuestionQuestionParsed } from '@features/question/services/question';
+import { CoreQuestionHelper } from '@features/question/services/question-helper';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support adaptive question behaviour.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonQbehaviourAdaptiveHandlerService implements CoreQuestionBehaviourHandler {
+
+    name = 'AddonQbehaviourAdaptive';
+    type = 'adaptive';
+
+    /**
+     * Handle a question behaviour.
+     * If the behaviour requires a submit button, it should add it to question.behaviourButtons.
+     * If the behaviour requires to show some extra data, it should return the components to render it.
+     *
+     * @param question The question.
+     * @return Components (or promise resolved with components) to render some extra data in the question
+     *         (e.g. certainty options). Don't return anything if no extra data is required.
+     */
+    handleQuestion(question: CoreQuestionQuestionParsed): void {
+        // Just extract the button, it doesn't need any specific component.
+        CoreQuestionHelper.instance.extractQbehaviourButtons(question);
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+}
+
+export class AddonQbehaviourAdaptiveHandler extends makeSingleton(AddonQbehaviourAdaptiveHandlerService) {}

src/addons/qbehaviour/adaptivenopenalty/adaptivenopenalty.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { CoreQuestionBehaviourDelegate } from '@features/question/services/behaviour-delegate';
+import { AddonQbehaviourAdaptiveNoPenaltyHandler } from './services/handlers/adaptivenopenalty';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                CoreQuestionBehaviourDelegate.instance.registerHandler(AddonQbehaviourAdaptiveNoPenaltyHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonQbehaviourAdaptiveNoPenaltyModule {}

src/addons/qbehaviour/adaptivenopenalty/services/handlers/adaptivenopenalty.ts

@@ -0,0 +1,56 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreQuestionBehaviourHandler } from '@features/question/services/behaviour-delegate';
+import { CoreQuestionQuestionParsed } from '@features/question/services/question';
+import { CoreQuestionHelper } from '@features/question/services/question-helper';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support adaptive no penalty question behaviour.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonQbehaviourAdaptiveNoPenaltyHandlerService implements CoreQuestionBehaviourHandler {
+
+    name = 'AddonQbehaviourAdaptiveNoPenalty';
+    type = 'adaptivenopenalty';
+
+    /**
+     * Handle a question behaviour.
+     * If the behaviour requires a submit button, it should add it to question.behaviourButtons.
+     * If the behaviour requires to show some extra data, it should return the components to render it.
+     *
+     * @param question The question.
+     * @return Components (or promise resolved with components) to render some extra data in the question
+     *         (e.g. certainty options). Don't return anything if no extra data is required.
+     */
+    handleQuestion(question: CoreQuestionQuestionParsed): void {
+        // Just extract the button, it doesn't need any specific component.
+        CoreQuestionHelper.instance.extractQbehaviourButtons(question);
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+}
+
+export class AddonQbehaviourAdaptiveNoPenaltyHandler extends makeSingleton(AddonQbehaviourAdaptiveNoPenaltyHandlerService) {}

src/addons/qbehaviour/deferredcbm/component/addon-qbehaviour-deferredcbm.html

@@ -0,0 +1,15 @@
+<div *ngIf="question && question.behaviourCertaintyOptions && question.behaviourCertaintyOptions.length">
+    <ion-item class="ion-text-wrap addon-qbehaviour-deferredcbm-certainty-title" >
+        <ion-label><p>{{ 'core.question.certainty' | translate }}</p></ion-label>
+    </ion-item>
+
+    <ion-radio-group [(ngModel)]="question.behaviourCertaintySelected" [name]="question.behaviourCertaintyOptions[0].name">
+        <ion-item class="ion-text-wrap" *ngFor="let option of question.behaviourCertaintyOptions">
+            <ion-label>{{ option.text }}</ion-label>
+            <ion-radio slot="end" id="{{option.id}}" [value]="option.value" [disabled]="option.disabled"></ion-radio>
+        </ion-item>
+    </ion-radio-group>
+
+    <!-- ion-radio doesn't use an input. Create a hidden input to hold the selected value. -->
+    <input type="hidden" [ngModel]="question.behaviourCertaintySelected" [attr.name]="question.behaviourCertaintyOptions[0].name">
+</div>

src/addons/qbehaviour/deferredcbm/component/deferredcbm.ts

@@ -0,0 +1,38 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Component, Input, Output, EventEmitter } from '@angular/core';
+
+import { CoreQuestionBehaviourButton, CoreQuestionQuestion } from '@features/question/services/question-helper';
+
+/**
+ * Component to render the deferred CBM in a question.
+ */
+@Component({
+    selector: 'addon-qbehaviour-deferredcbm',
+    templateUrl: 'addon-qbehaviour-deferredcbm.html',
+})
+export class AddonQbehaviourDeferredCBMComponent {
+
+    @Input() question?: CoreQuestionQuestion; // The question.
+    @Input() component?: string; // The component the question belongs to.
+    @Input() componentId?: number; // ID of the component the question belongs to.
+    @Input() attemptId?: number; // Attempt ID.
+    @Input() offlineEnabled?: boolean | string; // Whether the question can be answered in offline.
+    @Input() contextLevel?: string; // The context level.
+    @Input() contextInstanceId?: number; // The instance ID related to the context.
+    @Output() buttonClicked = new EventEmitter<CoreQuestionBehaviourButton>(); // Will emit when a behaviour button is clicked.
+    @Output() onAbort = new EventEmitter<void>(); // Should emit an event if the question should be aborted.
+
+}

src/addons/qbehaviour/deferredcbm/deferredcbm.module.ts

@@ -0,0 +1,43 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { CoreSharedModule } from '@/core/shared.module';
+import { CoreQuestionBehaviourDelegate } from '@features/question/services/behaviour-delegate';
+import { AddonQbehaviourDeferredCBMComponent } from './component/deferredcbm';
+import { AddonQbehaviourDeferredCBMHandler } from './services/handlers/deferredcbm';
+
+@NgModule({
+    declarations: [
+        AddonQbehaviourDeferredCBMComponent,
+    ],
+    imports: [
+        CoreSharedModule,
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                CoreQuestionBehaviourDelegate.instance.registerHandler(AddonQbehaviourDeferredCBMHandler.instance);
+            },
+        },
+    ],
+    exports: [
+        AddonQbehaviourDeferredCBMComponent,
+    ],
+})
+export class AddonQbehaviourDeferredCBMModule {}

src/addons/qbehaviour/deferredcbm/services/handlers/deferredcbm.ts

@@ -0,0 +1,152 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable, Type } from '@angular/core';
+
+import { AddonQbehaviourDeferredFeedbackHandler } from '@addons/qbehaviour/deferredfeedback/services/handlers/deferredfeedback';
+import { CoreQuestionBehaviourHandler, CoreQuestionQuestionWithAnswers } from '@features/question/services/behaviour-delegate';
+import { makeSingleton } from '@singletons';
+import { CoreQuestionQuestionParsed, CoreQuestionsAnswers, CoreQuestionState } from '@features/question/services/question';
+import { CoreQuestionHelper } from '@features/question/services/question-helper';
+import { AddonQbehaviourDeferredCBMComponent } from '../../component/deferredcbm';
+import { CoreQuestionDelegate } from '@features/question/services/question-delegate';
+
+/**
+ * Handler to support deferred CBM question behaviour.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonQbehaviourDeferredCBMHandlerService implements CoreQuestionBehaviourHandler {
+
+    name = 'AddonQbehaviourDeferredCBM';
+    type = 'deferredcbm';
+
+    /**
+     * Determine a question new state based on its answer(s).
+     *
+     * @param component Component the question belongs to.
+     * @param attemptId Attempt ID the question belongs to.
+     * @param question The question.
+     * @param componentId Component ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return New state (or promise resolved with state).
+     */
+    determineNewState(
+        component: string,
+        attemptId: number,
+        question: CoreQuestionQuestionWithAnswers,
+        componentId: string | number,
+        siteId?: string,
+    ): CoreQuestionState | Promise<CoreQuestionState> {
+        // Depends on deferredfeedback.
+        return AddonQbehaviourDeferredFeedbackHandler.instance.determineNewStateDeferred(
+            component,
+            attemptId,
+            question,
+            componentId,
+            siteId,
+            this.isCompleteResponse.bind(this),
+            this.isSameResponse.bind(this),
+        );
+    }
+
+    /**
+     * Handle a question behaviour.
+     * If the behaviour requires a submit button, it should add it to question.behaviourButtons.
+     * If the behaviour requires to show some extra data, it should return the components to render it.
+     *
+     * @param question The question.
+     * @return Components (or promise resolved with components) to render some extra data in the question
+     *         (e.g. certainty options). Don't return anything if no extra data is required.
+     */
+    handleQuestion(question: CoreQuestionQuestionParsed): void | Type<unknown>[] {
+        if (CoreQuestionHelper.instance.extractQbehaviourCBM(question)) {
+            return [AddonQbehaviourDeferredCBMComponent];
+        }
+    }
+
+    /**
+     * Check if a response is complete.
+     *
+     * @param question The question.
+     * @param answers Object with the question answers (without prefix).
+     * @param component The component the question is related to.
+     * @param componentId Component ID.
+     * @return 1 if complete, 0 if not complete, -1 if cannot determine.
+     */
+    protected isCompleteResponse(
+        question: CoreQuestionQuestionParsed,
+        answers: CoreQuestionsAnswers,
+        component: string,
+        componentId: string | number,
+    ): number {
+        // First check if the question answer is complete.
+        const complete = CoreQuestionDelegate.instance.isCompleteResponse(question, answers, component, componentId);
+        if (complete > 0) {
+            // Answer is complete, check the user answered CBM too.
+            return answers['-certainty'] ? 1 : 0;
+        }
+
+        return complete;
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+    /**
+     * Check if two responses are the same.
+     *
+     * @param question Question.
+     * @param prevAnswers Object with the previous question answers.
+     * @param prevBasicAnswers Object with the previous basic" answers (without sequencecheck, certainty, ...).
+     * @param newAnswers Object with the new question answers.
+     * @param newBasicAnswers Object with the previous basic" answers (without sequencecheck, certainty, ...).
+     * @param component The component the question is related to.
+     * @param componentId Component ID.
+     * @return Whether they're the same.
+     */
+    protected isSameResponse(
+        question: CoreQuestionQuestionParsed,
+        prevAnswers: CoreQuestionsAnswers,
+        prevBasicAnswers: CoreQuestionsAnswers,
+        newAnswers: CoreQuestionsAnswers,
+        newBasicAnswers: CoreQuestionsAnswers,
+        component: string,
+        componentId: string | number,
+    ): boolean {
+        // First check if the question answer is the same.
+        const sameResponse = CoreQuestionDelegate.instance.isSameResponse(
+            question,
+            prevBasicAnswers,
+            newBasicAnswers,
+            component,
+            componentId,
+        );
+
+        if (sameResponse) {
+            // Same response, check the CBM is the same too.
+            return prevAnswers['-certainty'] == newAnswers['-certainty'];
+        }
+
+        return sameResponse;
+    }
+
+}
+
+export class AddonQbehaviourDeferredCBMHandler extends makeSingleton(AddonQbehaviourDeferredCBMHandlerService) {}

src/addons/qbehaviour/deferredfeedback/deferredfeedback.module.ts

@@ -0,0 +1,33 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+import { CoreQuestionBehaviourDelegate } from '@features/question/services/behaviour-delegate';
+import { AddonQbehaviourDeferredFeedbackHandler } from './services/handlers/deferredfeedback';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                CoreQuestionBehaviourDelegate.instance.registerHandler(AddonQbehaviourDeferredFeedbackHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonQbehaviourDeferredFeedbackModule {}

src/addons/qbehaviour/deferredfeedback/services/handlers/deferredfeedback.ts

@@ -0,0 +1,216 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreQuestionBehaviourHandler, CoreQuestionQuestionWithAnswers } from '@features/question/services/behaviour-delegate';
+import { CoreQuestionDBRecord } from '@features/question/services/database/question';
+import {
+    CoreQuestion,
+    CoreQuestionQuestionParsed,
+    CoreQuestionsAnswers,
+    CoreQuestionState,
+} from '@features/question/services/question';
+import { CoreQuestionDelegate } from '@features/question/services/question-delegate';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support deferred feedback question behaviour.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonQbehaviourDeferredFeedbackHandlerService implements CoreQuestionBehaviourHandler {
+
+    name = 'AddonQbehaviourDeferredFeedback';
+    type = 'deferredfeedback';
+
+    /**
+     * Determine a question new state based on its answer(s).
+     *
+     * @param component Component the question belongs to.
+     * @param attemptId Attempt ID the question belongs to.
+     * @param question The question.
+     * @param componentId Component ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @return New state (or promise resolved with state).
+     */
+    determineNewState(
+        component: string,
+        attemptId: number,
+        question: CoreQuestionQuestionWithAnswers,
+        componentId: string | number,
+        siteId?: string,
+    ): CoreQuestionState | Promise<CoreQuestionState> {
+        return this.determineNewStateDeferred(component, attemptId, question, componentId, siteId);
+    }
+
+    /**
+     * Determine a question new state based on its answer(s) for deferred question behaviour.
+     *
+     * @param component Component the question belongs to.
+     * @param attemptId Attempt ID the question belongs to.
+     * @param question The question.
+     * @param componentId Component ID.
+     * @param siteId Site ID. If not defined, current site.
+     * @param isCompleteFn Function to override the default isCompleteResponse check.
+     * @param isSameFn Function to override the default isSameResponse check.
+     * @return Promise resolved with state.
+     */
+    async determineNewStateDeferred(
+        component: string,
+        attemptId: number,
+        question: CoreQuestionQuestionWithAnswers,
+        componentId: string | number,
+        siteId?: string,
+        isCompleteFn?: isCompleteResponseFunction,
+        isSameFn?: isSameResponseFunction,
+    ): Promise<CoreQuestionState> {
+
+        // Check if we have local data for the question.
+        let dbQuestion: CoreQuestionDBRecord | CoreQuestionQuestionWithAnswers = question;
+        try {
+            dbQuestion = await CoreQuestion.instance.getQuestion(component, attemptId, question.slot, siteId);
+        } catch (error) {
+            // No entry found, use the original data.
+        }
+
+        const state = CoreQuestion.instance.getState(dbQuestion.state);
+
+        if (state.finished || !state.active) {
+            // Question is finished, it cannot change.
+            return state;
+        }
+
+        const newBasicAnswers = CoreQuestion.instance.getBasicAnswers(question.answers || {});
+
+        if (dbQuestion.state) {
+            // Question already has a state stored. Check if answer has changed.
+            const prevAnswersList = await CoreQuestion.instance.getQuestionAnswers(
+                component,
+                attemptId,
+                question.slot,
+                false,
+                siteId,
+            );
+            const prevAnswers = CoreQuestion.instance.convertAnswersArrayToObject(prevAnswersList, true);
+            const prevBasicAnswers = CoreQuestion.instance.getBasicAnswers(prevAnswers);
+
+            // If answers haven't changed the state is the same.
+            let sameResponse = false;
+
+            if (isSameFn) {
+                sameResponse = isSameFn(
+                    question,
+                    prevAnswers,
+                    prevBasicAnswers,
+                    question.answers || {},
+                    newBasicAnswers,
+                    component,
+                    componentId,
+                );
+            } else {
+                sameResponse = CoreQuestionDelegate.instance.isSameResponse(
+                    question,
+                    prevBasicAnswers,
+                    newBasicAnswers,
+                    component,
+                    componentId,
+                );
+            }
+
+            if (sameResponse) {
+                return state;
+            }
+        }
+
+        // Answers have changed. Now check if the response is complete and calculate the new state.
+        let complete: number;
+        let newState: string;
+
+        if (isCompleteFn) {
+            // Pass all the answers since some behaviours might need the extra data.
+            complete = isCompleteFn(question, question.answers || {}, component, componentId);
+        } else {
+            // Only pass the basic answers since questions should be independent of extra data.
+            complete = CoreQuestionDelegate.instance.isCompleteResponse(question, newBasicAnswers, component, componentId);
+        }
+
+        if (complete < 0) {
+            newState = 'cannotdeterminestatus';
+        } else if (complete > 0) {
+            newState = 'complete';
+        } else {
+            const gradable = CoreQuestionDelegate.instance.isGradableResponse(question, newBasicAnswers, component, componentId);
+            if (gradable < 0) {
+                newState = 'cannotdeterminestatus';
+            } else if (gradable > 0) {
+                newState = 'invalid';
+            } else {
+                newState = 'todo';
+            }
+        }
+
+        return CoreQuestion.instance.getState(newState);
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+}
+
+export class AddonQbehaviourDeferredFeedbackHandler extends makeSingleton(AddonQbehaviourDeferredFeedbackHandlerService) {}
+
+
+/**
+ * Check if a response is complete.
+ *
+ * @param question The question.
+ * @param answers Object with the question answers (without prefix).
+ * @param component The component the question is related to.
+ * @param componentId Component ID.
+ * @return 1 if complete, 0 if not complete, -1 if cannot determine.
+ */
+export type isCompleteResponseFunction = (
+    question: CoreQuestionQuestionParsed,
+    answers: CoreQuestionsAnswers,
+    component: string,
+    componentId: string | number,
+) => number;
+
+/**
+ * Check if two responses are the same.
+ *
+ * @param question Question.
+ * @param prevAnswers Object with the previous question answers.
+ * @param prevBasicAnswers Object with the previous basic" answers (without sequencecheck, certainty, ...).
+ * @param newAnswers Object with the new question answers.
+ * @param newBasicAnswers Object with the previous basic" answers (without sequencecheck, certainty, ...).
+ * @param component The component the question is related to.
+ * @param componentId Component ID.
+ * @return Whether they're the same.
+ */
+export type isSameResponseFunction = (
+    question: CoreQuestionQuestionParsed,
+    prevAnswers: CoreQuestionsAnswers,
+    prevBasicAnswers: CoreQuestionsAnswers,
+    newAnswers: CoreQuestionsAnswers,
+    newBasicAnswers: CoreQuestionsAnswers,
+    component: string,
+    componentId: string | number,
+) => boolean;

src/addons/qbehaviour/immediatecbm/immediatecbm.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { CoreQuestionBehaviourDelegate } from '@features/question/services/behaviour-delegate';
+import { AddonQbehaviourImmediateCBMHandler } from './services/handlers/immediatecbm';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                CoreQuestionBehaviourDelegate.instance.registerHandler(AddonQbehaviourImmediateCBMHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonQbehaviourImmediateCBMModule {}

src/addons/qbehaviour/immediatecbm/services/handlers/immediatecbm.ts

@@ -0,0 +1,61 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { AddonQbehaviourDeferredCBMComponent } from '@addons/qbehaviour/deferredcbm/component/deferredcbm';
+import { Injectable, Type } from '@angular/core';
+
+import { CoreQuestionBehaviourHandler } from '@features/question/services/behaviour-delegate';
+import { CoreQuestionQuestionParsed } from '@features/question/services/question';
+import { CoreQuestionHelper } from '@features/question/services/question-helper';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support immediate CBM question behaviour.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonQbehaviourImmediateCBMHandlerService implements CoreQuestionBehaviourHandler {
+
+    name = 'AddonQbehaviourImmediateCBM';
+    type = 'immediatecbm';
+
+    /**
+     * Handle a question behaviour.
+     * If the behaviour requires a submit button, it should add it to question.behaviourButtons.
+     * If the behaviour requires to show some extra data, it should return the components to render it.
+     *
+     * @param question The question.
+     * @return Components (or promise resolved with components) to render some extra data in the question
+     *         (e.g. certainty options). Don't return anything if no extra data is required.
+     */
+    handleQuestion(question: CoreQuestionQuestionParsed): void | Type<unknown>[] {
+        CoreQuestionHelper.instance.extractQbehaviourButtons(question);
+
+        if (CoreQuestionHelper.instance.extractQbehaviourCBM(question)) {
+            // Depends on deferredcbm.
+            return [AddonQbehaviourDeferredCBMComponent];
+        }
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+}
+
+export class AddonQbehaviourImmediateCBMHandler extends makeSingleton(AddonQbehaviourImmediateCBMHandlerService) {}

src/addons/qbehaviour/immediatefeedback/immediatefeedback.module.ts

@@ -0,0 +1,34 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { APP_INITIALIZER, NgModule } from '@angular/core';
+
+import { CoreQuestionBehaviourDelegate } from '@features/question/services/behaviour-delegate';
+import { AddonQbehaviourImmediateFeedbackHandler } from './services/handlers/immediatefeedback';
+
+@NgModule({
+    declarations: [
+    ],
+    providers: [
+        {
+            provide: APP_INITIALIZER,
+            multi: true,
+            deps: [],
+            useFactory: () => () => {
+                CoreQuestionBehaviourDelegate.instance.registerHandler(AddonQbehaviourImmediateFeedbackHandler.instance);
+            },
+        },
+    ],
+})
+export class AddonQbehaviourImmediateFeedbackModule {}

src/addons/qbehaviour/immediatefeedback/services/handlers/immediatefeedback.ts

@@ -0,0 +1,58 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { Injectable } from '@angular/core';
+
+import { CoreQuestionBehaviourHandler } from '@features/question/services/behaviour-delegate';
+import { CoreQuestionQuestionParsed } from '@features/question/services/question';
+import { CoreQuestionHelper } from '@features/question/services/question-helper';
+import { makeSingleton } from '@singletons';
+
+/**
+ * Handler to support immediate feedback question behaviour.
+ */
+@Injectable({ providedIn: 'root' })
+export class AddonQbehaviourImmediateFeedbackHandlerService implements CoreQuestionBehaviourHandler {
+
+    name = 'AddonQbehaviourImmediateFeedback';
+    type = 'immediatefeedback';
+
+    /**
+     * Handle a question behaviour.
+     * If the behaviour requires a submit button, it should add it to question.behaviourButtons.
+     * If the behaviour requires to show some extra data, it should return the components to render it.
+     *
+     * @param question The question.
+     * @return Components (or promise resolved with components) to render some extra data in the question
+     *         (e.g. certainty options). Don't return anything if no extra data is required.
+     */
+    handleQuestion(question: CoreQuestionQuestionParsed): void {
+        // Just extract the button, it doesn't need any specific component.
+        CoreQuestionHelper.instance.extractQbehaviourButtons(question);
+
+        return;
+    }
+
+    /**
+     * Whether or not the handler is enabled on a site level.
+     *
+     * @return True or promise resolved with true if enabled.
+     */
+    async isEnabled(): Promise<boolean> {
+        return true;
+    }
+
+}
+
+export class AddonQbehaviourImmediateFeedbackHandler extends makeSingleton(AddonQbehaviourImmediateFeedbackHandlerService) {}

src/addons/qbehaviour/informationitem/component/addon-qbehaviour-informationitem.html

@@ -0,0 +1,2 @@
+<input *ngIf="question && question.behaviourSeenInput" type="hidden" [name]="question.behaviourSeenInput.name"
+    [value]="question.behaviourSeenInput.value" >