From 5a79151b01f1999de6c1f927cbe00c1fa28d303a Mon Sep 17 00:00:00 2001
From: Dani Palou <dani@moodle.com>
Date: Fri, 31 Jan 2020 10:08:24 +0100
Subject: [PATCH] MOBILE-3323 editor: Save and restore drafts

---
 scripts/langindex.json                        |   2 +
 .../calendar/pages/edit-event/edit-event.html |   2 +-
 .../addon-mod-assign-feedback-comments.html   |   3 +-
 ...ddon-mod-assign-submission-onlinetext.html |   2 +-
 .../onlinetext/component/onlinetext.ts        |  14 +-
 .../addon-mod-data-field-textarea.html        |   2 +-
 .../fields/textarea/component/textarea.ts     |   6 +-
 .../components/post/addon-mod-forum-post.html |   2 +-
 .../edit-post/addon-mod-forum-edit-post.html  |   2 +-
 .../pages/new-discussion/new-discussion.html  |   2 +-
 src/addon/mod/glossary/pages/edit/edit.html   |   2 +-
 src/addon/mod/glossary/pages/edit/edit.ts     |   5 +
 src/addon/mod/lesson/pages/player/player.html |   2 +-
 src/addon/mod/wiki/pages/edit/edit.html       |   2 +-
 src/addon/mod/wiki/pages/edit/edit.ts         |  15 ++
 ...ddon-mod-workshop-assessment-strategy.html |   2 +-
 .../workshop/pages/assessment/assessment.html |   2 +-
 .../edit-submission/edit-submission.html      |   2 +-
 .../pages/edit-submission/edit-submission.ts  |   5 +
 .../workshop/pages/submission/submission.html |   2 +-
 .../essay/component/addon-qtype-essay.html    |   2 +-
 .../addon-user-profile-field-textarea.html    |   2 +-
 src/assets/lang/en.json                       |   2 +
 .../core-editor-rich-text-editor.html         |  13 +-
 .../rich-text-editor/rich-text-editor.scss    |  18 ++-
 .../rich-text-editor/rich-text-editor.ts      | 142 +++++++++++++++++-
 src/core/editor/lang/en.json                  |   4 +
 src/theme/variables.scss                      |   5 -
 28 files changed, 228 insertions(+), 36 deletions(-)
 create mode 100644 src/core/editor/lang/en.json

diff --git a/scripts/langindex.json b/scripts/langindex.json
index 344e7460d..339c56c5a 100644
--- a/scripts/langindex.json
+++ b/scripts/langindex.json
@@ -1482,6 +1482,8 @@
   "core.downloaded": "local_moodlemobileapp",
   "core.downloading": "local_moodlemobileapp",
   "core.edit": "moodle",
+  "core.editor.autosavesucceeded": "editor_atto",
+  "core.editor.textrecovered": "editor_atto",
   "core.emptysplit": "local_moodlemobileapp",
   "core.error": "moodle",
   "core.errorchangecompletion": "local_moodlemobileapp",
diff --git a/src/addon/calendar/pages/edit-event/edit-event.html b/src/addon/calendar/pages/edit-event/edit-event.html
index 9eae210f8..55a2cd584 100644
--- a/src/addon/calendar/pages/edit-event/edit-event.html
+++ b/src/addon/calendar/pages/edit-event/edit-event.html
@@ -86,7 +86,7 @@
                 <!-- Description. -->
                 <ion-item text-wrap>
                     <ion-label stacked><h2>{{ 'core.description' | translate }}</h2></ion-label>
-                    <core-rich-text-editor item-content [control]="descriptionControl" [placeholder]="'core.description' | translate" name="description" [component]="component" [componentId]="eventId"></core-rich-text-editor>
+                    <core-rich-text-editor item-content [control]="descriptionControl" [placeholder]="'core.description' | translate" name="description" [component]="component" [componentId]="eventId" [autoSave]="false"></core-rich-text-editor>
                 </ion-item>
 
                 <!-- Location. -->
diff --git a/src/addon/mod/assign/feedback/comments/component/addon-mod-assign-feedback-comments.html b/src/addon/mod/assign/feedback/comments/component/addon-mod-assign-feedback-comments.html
index 6a2fff370..75892386b 100644
--- a/src/addon/mod/assign/feedback/comments/component/addon-mod-assign-feedback-comments.html
+++ b/src/addon/mod/assign/feedback/comments/component/addon-mod-assign-feedback-comments.html
@@ -19,5 +19,6 @@
 
 <!-- Edit -->
 <ion-item text-wrap *ngIf="edit && loaded">
-    <core-rich-text-editor item-content [control]="control" [placeholder]="plugin.name" name="assignfeedbackcomments_editor" [component]="component" [componentId]="assign.cmid"></core-rich-text-editor>
+    <core-rich-text-editor item-content [control]="control" [placeholder]="plugin.name" name="assignfeedbackcomments_editor" [component]="component" [componentId]="assign.cmid" [autoSave]="true" contextLevel="module" [contextInstanceId]="assign.cmid" elementId="assignfeedbackcomments_editor" [draftExtraParams]="{userid: userId, action: 'grade'}">
+    </core-rich-text-editor>
 </ion-item>
diff --git a/src/addon/mod/assign/submission/onlinetext/component/addon-mod-assign-submission-onlinetext.html b/src/addon/mod/assign/submission/onlinetext/component/addon-mod-assign-submission-onlinetext.html
index a629ab325..a659af7a9 100644
--- a/src/addon/mod/assign/submission/onlinetext/component/addon-mod-assign-submission-onlinetext.html
+++ b/src/addon/mod/assign/submission/onlinetext/component/addon-mod-assign-submission-onlinetext.html
@@ -15,6 +15,6 @@
         <p>{{ 'core.numwords' | translate: {'$a': words + ' / ' + configs.wordlimit} }}</p>
     </ion-item>
     <ion-item text-wrap>
-        <core-rich-text-editor item-content [control]="control" [placeholder]="plugin.name" name="onlinetext_editor_text" (contentChanged)="onChange($event)" [component]="component" [componentId]="assign.cmid"></core-rich-text-editor>
+        <core-rich-text-editor item-content [control]="control" [placeholder]="plugin.name" name="onlinetext_editor_text" (contentChanged)="onChange($event)" [component]="component" [componentId]="assign.cmid" [autoSave]="true" contextLevel="module" [contextInstanceId]="assign.cmid" elementId="onlinetext_editor" [draftExtraParams]="{userid: currentUserId, action: 'editsubmission'}"></core-rich-text-editor>
     </ion-item>
 </div>
diff --git a/src/addon/mod/assign/submission/onlinetext/component/onlinetext.ts b/src/addon/mod/assign/submission/onlinetext/component/onlinetext.ts
index 70ee9d183..a788de667 100644
--- a/src/addon/mod/assign/submission/onlinetext/component/onlinetext.ts
+++ b/src/addon/mod/assign/submission/onlinetext/component/onlinetext.ts
@@ -14,6 +14,7 @@
 
 import { Component, OnInit, ElementRef } from '@angular/core';
 import { FormBuilder, FormControl } from '@angular/forms';
+import { CoreSitesProvider } from '@providers/sites';
 import { CoreDomUtilsProvider } from '@providers/utils/dom';
 import { CoreTextUtilsProvider } from '@providers/utils/text';
 import { AddonModAssignProvider } from '../../../providers/assign';
@@ -35,16 +36,23 @@ export class AddonModAssignSubmissionOnlineTextComponent extends AddonModAssignS
     text: string;
     loaded: boolean;
     wordLimitEnabled: boolean;
+    currentUserId: number;
 
     protected wordCountTimeout: any;
     protected element: HTMLElement;
 
-    constructor(protected fb: FormBuilder, protected domUtils: CoreDomUtilsProvider, protected textUtils: CoreTextUtilsProvider,
-            protected assignProvider: AddonModAssignProvider, protected assignOfflineProvider: AddonModAssignOfflineProvider,
-            element: ElementRef) {
+    constructor(
+            protected fb: FormBuilder,
+            protected domUtils: CoreDomUtilsProvider,
+            protected textUtils: CoreTextUtilsProvider,
+            protected assignProvider: AddonModAssignProvider,
+            protected assignOfflineProvider: AddonModAssignOfflineProvider,
+            element: ElementRef,
+            sitesProvider: CoreSitesProvider) {
 
         super();
         this.element = element.nativeElement;
+        this.currentUserId = sitesProvider.getCurrentSiteUserId();
     }
 
     /**
diff --git a/src/addon/mod/data/fields/textarea/component/addon-mod-data-field-textarea.html b/src/addon/mod/data/fields/textarea/component/addon-mod-data-field-textarea.html
index 02ce6f367..680b92f89 100644
--- a/src/addon/mod/data/fields/textarea/component/addon-mod-data-field-textarea.html
+++ b/src/addon/mod/data/fields/textarea/component/addon-mod-data-field-textarea.html
@@ -2,7 +2,7 @@
     <ion-input *ngIf="mode == 'search'" type="text" [placeholder]="field.name" [formControlName]="'f_'+field.id"></ion-input>
 
     <span *ngIf="mode == 'edit'" [core-mark-required]="field.required" class="core-mark-required"></span>
-    <core-rich-text-editor *ngIf="mode == 'edit'" item-content [control]="form.controls['f_'+field.id]" [placeholder]="field.name" [formControlName]="'f_'+field.id" [component]="component" [componentId]="componentId"></core-rich-text-editor>
+    <core-rich-text-editor *ngIf="mode == 'edit'" item-content [control]="form.controls['f_'+field.id]" [placeholder]="field.name" [formControlName]="'f_'+field.id" [component]="component" [componentId]="componentId" [autoSave]="true" contextLevel="module" [contextInstanceId]="componentId" [elementId]="'field_'+field.id"></core-rich-text-editor>
     <core-input-errors *ngIf="error && mode == 'edit'" [control]="form.controls['f_'+field.id]" [errorText]="error"></core-input-errors>
 </span>
 
diff --git a/src/addon/mod/data/fields/textarea/component/textarea.ts b/src/addon/mod/data/fields/textarea/component/textarea.ts
index ba54212d7..d0d03359a 100644
--- a/src/addon/mod/data/fields/textarea/component/textarea.ts
+++ b/src/addon/mod/data/fields/textarea/component/textarea.ts
@@ -49,10 +49,10 @@ export class AddonModDataFieldTextareaComponent extends AddonModDataFieldPluginC
      * Initialize field.
      */
     protected init(): void {
-        if (this.isShowOrListMode()) {
-            this.component = AddonModDataProvider.COMPONENT;
-            this.componentId = this.database.coursemodule;
+        this.component = AddonModDataProvider.COMPONENT;
+        this.componentId = this.database.coursemodule;
 
+        if (this.isShowOrListMode()) {
             return;
         }
 
diff --git a/src/addon/mod/forum/components/post/addon-mod-forum-post.html b/src/addon/mod/forum/components/post/addon-mod-forum-post.html
index 02a3bbe42..cafe72514 100644
--- a/src/addon/mod/forum/components/post/addon-mod-forum-post.html
+++ b/src/addon/mod/forum/components/post/addon-mod-forum-post.html
@@ -64,7 +64,7 @@
         </ion-item>
         <ion-item>
             <ion-label stacked>{{ 'addon.mod_forum.message' | translate }}</ion-label>
-            <core-rich-text-editor item-content [control]="messageControl" (contentChanged)="onMessageChange($event)" [placeholder]="'addon.mod_forum.replyplaceholder' | translate" [name]="'mod_forum_reply_' + post.id" [component]="component" [componentId]="componentId"></core-rich-text-editor>
+            <core-rich-text-editor item-content [control]="messageControl" (contentChanged)="onMessageChange($event)" [placeholder]="'addon.mod_forum.replyplaceholder' | translate" [name]="'mod_forum_reply_' + post.id" [component]="component" [componentId]="componentId" [autoSave]="true" contextLevel="module" [contextInstanceId]="forum && forum.cmid" elementId="message" [draftExtraParams]="{reply: post.id}"></core-rich-text-editor>
         </ion-item>
         <ion-item text-wrap *ngIf="accessInfo.canpostprivatereply">
             <ion-label>{{ 'addon.mod_forum.privatereply' | translate }}</ion-label>
diff --git a/src/addon/mod/forum/pages/edit-post/addon-mod-forum-edit-post.html b/src/addon/mod/forum/pages/edit-post/addon-mod-forum-edit-post.html
index 0a934fa27..3fd8d6e4a 100644
--- a/src/addon/mod/forum/pages/edit-post/addon-mod-forum-edit-post.html
+++ b/src/addon/mod/forum/pages/edit-post/addon-mod-forum-edit-post.html
@@ -16,7 +16,7 @@
         </ion-item>
         <ion-item>
             <ion-label stacked>{{ 'addon.mod_forum.message' | translate }}</ion-label>
-            <core-rich-text-editor item-content [control]="messageControl" (contentChanged)="onMessageChange($event)" [placeholder]="'addon.mod_forum.replyplaceholder' | translate" [name]="'mod_forum_reply_' + replyData.id" [component]="component" [componentId]="componentId"></core-rich-text-editor>
+            <core-rich-text-editor item-content [control]="messageControl" (contentChanged)="onMessageChange($event)" [placeholder]="'addon.mod_forum.replyplaceholder' | translate" [name]="'mod_forum_reply_' + replyData.id" [component]="component" [componentId]="componentId" [autoSave]="true" contextLevel="module" [contextInstanceId]="forum.cmid" elementId="message" [draftExtraParams]="{edit: replyData.id}"></core-rich-text-editor>
         </ion-item>
         <ion-item-divider text-wrap (click)="toggleAdvanced()" class="core-expandable">
             <core-icon *ngIf="!advanced" name="fa-caret-right" item-start></core-icon>
diff --git a/src/addon/mod/forum/pages/new-discussion/new-discussion.html b/src/addon/mod/forum/pages/new-discussion/new-discussion.html
index 95bb6e5ce..6cfeb39f8 100644
--- a/src/addon/mod/forum/pages/new-discussion/new-discussion.html
+++ b/src/addon/mod/forum/pages/new-discussion/new-discussion.html
@@ -19,7 +19,7 @@
             </ion-item>
             <ion-item>
                 <ion-label stacked>{{ 'addon.mod_forum.message' | translate }}</ion-label>
-                <core-rich-text-editor item-content [control]="messageControl" (contentChanged)="onMessageChange($event)" [placeholder]="'addon.mod_forum.message' | translate" name="addon_mod_forum_new_discussion" [component]="component" [componentId]="forum.cmid"></core-rich-text-editor>
+                <core-rich-text-editor item-content [control]="messageControl" (contentChanged)="onMessageChange($event)" [placeholder]="'addon.mod_forum.message' | translate" name="addon_mod_forum_new_discussion" [component]="component" [componentId]="forum.cmid" [autoSave]="true" contextLevel="module" [contextInstanceId]="forum.cmid" elementId="message"></core-rich-text-editor>
             </ion-item>
             <ion-item-divider text-wrap (click)="toggleAdvanced()" class="core-expandable">
                 <core-icon *ngIf="!advanced" name="fa-caret-right" item-start></core-icon>
diff --git a/src/addon/mod/glossary/pages/edit/edit.html b/src/addon/mod/glossary/pages/edit/edit.html
index 3c3bfa0d7..0bf02b458 100644
--- a/src/addon/mod/glossary/pages/edit/edit.html
+++ b/src/addon/mod/glossary/pages/edit/edit.html
@@ -15,7 +15,7 @@
             </ion-item>
             <ion-item>
                 <ion-label stacked>{{ 'addon.mod_glossary.definition' | translate }}</ion-label>
-                <core-rich-text-editor item-content [control]="definitionControl" (contentChanged)="onDefinitionChange($event)" [placeholder]="'addon.mod_glossary.definition' | translate" name="addon_mod_glossary_edit" [component]="component" [componentId]="glossary.cmid"></core-rich-text-editor>
+                <core-rich-text-editor item-content [control]="definitionControl" (contentChanged)="onDefinitionChange($event)" [placeholder]="'addon.mod_glossary.definition' | translate" name="addon_mod_glossary_edit" [component]="component" [componentId]="glossary.cmid" [autoSave]="true" contextLevel="module" [contextInstanceId]="module.id" elementId="definition_editor" [draftExtraParams]="editorExtraParams"></core-rich-text-editor>
             </ion-item>
             <ion-item *ngIf="categories.length > 0">
                 <ion-label stacked id="addon-mod-glossary-categories-label">{{ 'addon.mod_glossary.categories' | translate }}</ion-label>
diff --git a/src/addon/mod/glossary/pages/edit/edit.ts b/src/addon/mod/glossary/pages/edit/edit.ts
index 7bb9e60eb..9cf8b4355 100644
--- a/src/addon/mod/glossary/pages/edit/edit.ts
+++ b/src/addon/mod/glossary/pages/edit/edit.ts
@@ -51,6 +51,7 @@ export class AddonModGlossaryEditPage implements OnInit {
     attachments = [];
     definitionControl = new FormControl();
     categories = [];
+    editorExtraParams: {[name: string]: any} = {};
 
     protected courseId: number;
     protected module: any;
@@ -113,6 +114,10 @@ export class AddonModGlossaryEditPage implements OnInit {
                     this.originalData.files = files.slice();
                 });
             }
+
+            if (entry.id) {
+                this.editorExtraParams.id = entry.id;
+            }
         }
 
         this.definitionControl.setValue(this.entry.definition);
diff --git a/src/addon/mod/lesson/pages/player/player.html b/src/addon/mod/lesson/pages/player/player.html
index 13c7e7f0b..b8526c401 100644
--- a/src/addon/mod/lesson/pages/player/player.html
+++ b/src/addon/mod/lesson/pages/player/player.html
@@ -57,7 +57,7 @@
                         <!-- Essay. -->
                         <ng-container *ngSwitchCase="'essay'">
                             <ion-item *ngIf="question.textarea">
-                                <core-rich-text-editor item-content placeholder="{{ 'addon.mod_lesson.youranswer' | translate }}" [control]="question.control" [component]="component" [componentId]="lesson.coursemodule"></core-rich-text-editor>
+                                <core-rich-text-editor item-content placeholder="{{ 'addon.mod_lesson.youranswer' | translate }}" [control]="question.control" [component]="component" [componentId]="lesson.coursemodule" [autoSave]="true" contextLevel="module" [contextInstanceId]="lesson.coursemodule" elementId="answer_editor"></core-rich-text-editor>
                             </ion-item>
                             <ion-item text-wrap *ngIf="!question.textarea && question.useranswer">
                                 <p class="item-heading">{{ 'addon.mod_lesson.youranswer' | translate }}</p>
diff --git a/src/addon/mod/wiki/pages/edit/edit.html b/src/addon/mod/wiki/pages/edit/edit.html
index c9f61f896..2381df6c3 100644
--- a/src/addon/mod/wiki/pages/edit/edit.html
+++ b/src/addon/mod/wiki/pages/edit/edit.html
@@ -17,7 +17,7 @@
             </ion-item>
 
             <ion-item>
-                <core-rich-text-editor item-content [control]="contentControl" [placeholder]="'core.content' | translate" name="wiki_page_content" [component]="component" [componentId]="componentId"></core-rich-text-editor>
+                <core-rich-text-editor item-content [control]="contentControl" [placeholder]="'core.content' | translate" name="wiki_page_content" [component]="component" [componentId]="componentId" [autoSave]="true" contextLevel="module" [contextInstanceId]="module.id || 0" elementId="newcontent_editor" [draftExtraParams]="editorExtraParams"></core-rich-text-editor>
             </ion-item>
 
             <ion-item *ngIf="wrongVersionLock" text-center class="addon-mod_wiki-wrongversionlock" >
diff --git a/src/addon/mod/wiki/pages/edit/edit.ts b/src/addon/mod/wiki/pages/edit/edit.ts
index 160bfeeb2..033ec982e 100644
--- a/src/addon/mod/wiki/pages/edit/edit.ts
+++ b/src/addon/mod/wiki/pages/edit/edit.ts
@@ -45,6 +45,7 @@ export class AddonModWikiEditPage implements OnInit, OnDestroy {
     component = AddonModWikiProvider.COMPONENT; // Component to link the files to.
     componentId: number; // Component ID to link the files to.
     wrongVersionLock: boolean; // Whether the page lock doesn't match the initial one.
+    editorExtraParams: {[name: string]: any} = {};
 
     protected module: any; // Wiki module instance.
     protected courseId: number; // Course the wiki belongs to.
@@ -101,6 +102,20 @@ export class AddonModWikiEditPage implements OnInit, OnDestroy {
 
         // Block the wiki so it cannot be synced.
         this.syncProvider.blockOperation(this.component, this.blockId);
+
+        if (!this.module.id) {
+            this.editorExtraParams.type = 'wiki';
+        }
+
+        if (this.pageId) {
+            this.editorExtraParams.pageid = this.pageId;
+
+            if (this.section) {
+                this.editorExtraParams.section = this.section;
+            }
+        } else if (pageTitle) {
+            this.editorExtraParams.pagetitle = pageTitle;
+        }
     }
 
     /**
diff --git a/src/addon/mod/workshop/components/assessment-strategy/addon-mod-workshop-assessment-strategy.html b/src/addon/mod/workshop/components/assessment-strategy/addon-mod-workshop-assessment-strategy.html
index 7f3b2bba7..b79857e1d 100644
--- a/src/addon/mod/workshop/components/assessment-strategy/addon-mod-workshop-assessment-strategy.html
+++ b/src/addon/mod/workshop/components/assessment-strategy/addon-mod-workshop-assessment-strategy.html
@@ -16,7 +16,7 @@
             </ion-item>
             <ion-item stacked *ngIf="edit">
                 <ion-label stacked [core-mark-required]="overallFeedkbackRequired">{{ 'addon.mod_workshop.feedbackauthor' | translate }}</ion-label>
-                <core-rich-text-editor item-content [control]="feedbackControl" [component]="component" [componentId]="workshop.coursemodule" (contentChanged)="onFeedbackChange($event)"></core-rich-text-editor>
+                <core-rich-text-editor item-content [control]="feedbackControl" [component]="component" [componentId]="workshop.coursemodule" [autoSave]="true" contextLevel="module" [contextInstanceId]="workshop.coursemodule" elementId="feedbackauthor_editor" [draftExtraParams]="{asid: assessmentId}" (contentChanged)="onFeedbackChange($event)"></core-rich-text-editor>
                 <core-input-errors item-content *ngIf="overallFeedkbackRequired && fieldErrors && fieldErrors['feedbackauthor']" [errorText]="fieldErrors['feedbackauthor']"></core-input-errors>
             </ion-item>
             <core-attachments *ngIf="edit && workshop.overallfeedbackfiles" [files]="data.assessment.feedbackattachmentfiles" [maxSize]="workshop.overallfeedbackmaxbytes"
diff --git a/src/addon/mod/workshop/pages/assessment/assessment.html b/src/addon/mod/workshop/pages/assessment/assessment.html
index 76229b26a..6d093a0c4 100644
--- a/src/addon/mod/workshop/pages/assessment/assessment.html
+++ b/src/addon/mod/workshop/pages/assessment/assessment.html
@@ -60,7 +60,7 @@
             </ion-item>
             <ion-item *ngIf="access.canoverridegrades">
                 <ion-label stacked>{{ 'addon.mod_workshop.feedbackreviewer' | translate }}</ion-label>
-                <core-rich-text-editor item-content [control]="evaluateForm.controls['text']" formControlName="text"></core-rich-text-editor>
+                <core-rich-text-editor item-content [control]="evaluateForm.controls['text']" formControlName="text" [autoSave]="true" contextLevel="module" [contextInstanceId]="workshop.coursemodule" elementId="feedbackreviewer_editor" [draftExtraParams]="{asid: assessmentId}"></core-rich-text-editor>
             </ion-item>
         </form>
         <ion-list *ngIf="!evaluating && evaluate && evaluate.text">
diff --git a/src/addon/mod/workshop/pages/edit-submission/edit-submission.html b/src/addon/mod/workshop/pages/edit-submission/edit-submission.html
index 71b1e535d..a7f3bad68 100644
--- a/src/addon/mod/workshop/pages/edit-submission/edit-submission.html
+++ b/src/addon/mod/workshop/pages/edit-submission/edit-submission.html
@@ -18,7 +18,7 @@
 
             <ion-item *ngIf="textAvailable">
                 <ion-label stacked [core-mark-required]="textRequired">{{ 'addon.mod_workshop.submissioncontent' | translate }}</ion-label>
-                <core-rich-text-editor item-content [control]="editForm.controls['content']" formControlName="content" [placeholder]="'addon.mod_workshop.submissioncontent' | translate"  name="content" [component]="component" [componentId]="componentId"></core-rich-text-editor>
+                <core-rich-text-editor item-content [control]="editForm.controls['content']" formControlName="content" [placeholder]="'addon.mod_workshop.submissioncontent' | translate"  name="content" [component]="component" [componentId]="componentId" [autoSave]="true" contextLevel="module" [contextInstanceId]="module.id" elementId="content_editor" [draftExtraParams]="editorExtraParams"></core-rich-text-editor>
             </ion-item>
 
             <core-attachments *ngIf="fileAvailable" [files]="submission.attachmentfiles" [maxSize]="workshop.maxbytes" [maxSubmissions]="workshop.nattachments" [component]="component" [componentId]="workshop.coursemodule" allowOffline="true" [acceptedTypes]="workshop.submissionfiletypes" [required]="fileRequired"></core-attachments>
diff --git a/src/addon/mod/workshop/pages/edit-submission/edit-submission.ts b/src/addon/mod/workshop/pages/edit-submission/edit-submission.ts
index 816a29b46..c3fb1edbb 100644
--- a/src/addon/mod/workshop/pages/edit-submission/edit-submission.ts
+++ b/src/addon/mod/workshop/pages/edit-submission/edit-submission.ts
@@ -51,6 +51,7 @@ export class AddonModWorkshopEditSubmissionPage implements OnInit, OnDestroy {
     component = AddonModWorkshopProvider.COMPONENT;
     componentId: number;
     editForm: FormGroup; // The form group.
+    editorExtraParams: {[name: string]: any} = {};
 
     protected workshopId: number;
     protected submissionId: number;
@@ -86,6 +87,10 @@ export class AddonModWorkshopEditSubmissionPage implements OnInit, OnDestroy {
         this.editForm = new FormGroup({});
         this.editForm.addControl('title', this.fb.control('', Validators.required));
         this.editForm.addControl('content', this.fb.control(''));
+
+        if (this.submissionId) {
+            this.editorExtraParams.id = this.submissionId;
+        }
     }
 
     /**
diff --git a/src/addon/mod/workshop/pages/submission/submission.html b/src/addon/mod/workshop/pages/submission/submission.html
index 41fbecd1d..0951709ae 100644
--- a/src/addon/mod/workshop/pages/submission/submission.html
+++ b/src/addon/mod/workshop/pages/submission/submission.html
@@ -87,7 +87,7 @@
             </ion-item>
             <ion-item>
                 <ion-label stacked>{{ 'addon.mod_workshop.feedbackauthor' | translate }}</ion-label>
-                <core-rich-text-editor item-content [control]="feedbackForm.controls['text']" formControlName="text"></core-rich-text-editor>
+                <core-rich-text-editor item-content [control]="feedbackForm.controls['text']" formControlName="text" [autoSave]="true" contextLevel="module" [contextInstanceId]="module.id" elementId="feedbackauthor_editor" [draftExtraParams]="{id: submissionId}"></core-rich-text-editor>
             </ion-item>
         </form>
 
diff --git a/src/addon/qtype/essay/component/addon-qtype-essay.html b/src/addon/qtype/essay/component/addon-qtype-essay.html
index 5c171fedc..13462423b 100644
--- a/src/addon/qtype/essay/component/addon-qtype-essay.html
+++ b/src/addon/qtype/essay/component/addon-qtype-essay.html
@@ -11,7 +11,7 @@
         <!-- Plain text textarea. -->
         <ion-textarea *ngIf="question.isPlainText" class="core-question-textarea" [ngClass]='{"core-monospaced": question.isMonospaced}' placeholder="{{ 'core.question.answer' | translate }}" [attr.name]="question.textarea.name" aria-multiline="true" [ngModel]="question.textarea.text"></ion-textarea>
         <!-- Rich text editor. -->
-        <core-rich-text-editor item-content *ngIf="!question.isPlainText" placeholder="{{ 'core.question.answer' | translate }}" [control]="formControl" [name]="question.textarea.name" [component]="component" [componentId]="componentId"></core-rich-text-editor>
+        <core-rich-text-editor item-content *ngIf="!question.isPlainText" placeholder="{{ 'core.question.answer' | translate }}" [control]="formControl" [name]="question.textarea.name" [component]="component" [componentId]="componentId" [autoSave]="false"></core-rich-text-editor>
     </ion-item>
 
     <!-- Draft files not supported. -->
diff --git a/src/addon/userprofilefield/textarea/component/addon-user-profile-field-textarea.html b/src/addon/userprofilefield/textarea/component/addon-user-profile-field-textarea.html
index 1d149a8ed..8908db521 100644
--- a/src/addon/userprofilefield/textarea/component/addon-user-profile-field-textarea.html
+++ b/src/addon/userprofilefield/textarea/component/addon-user-profile-field-textarea.html
@@ -9,5 +9,5 @@
         <span [core-mark-required]="field.required">{{ field.name }}</span>
         <core-input-errors [control]="control"></core-input-errors>
     </ion-label>
-    <core-rich-text-editor item-content [control]="control" [placeholder]="field.name"></core-rich-text-editor>
+    <core-rich-text-editor item-content [control]="control" [placeholder]="field.name" [autoSave]="true" [contextLevel]="contextLevel" [contextInstanceId]="contextInstanceId" [elementId]="'profile_field_' + field.shortname"></core-rich-text-editor>
 </ion-item>
\ No newline at end of file
diff --git a/src/assets/lang/en.json b/src/assets/lang/en.json
index e9673f525..d3f4ff056 100644
--- a/src/assets/lang/en.json
+++ b/src/assets/lang/en.json
@@ -1482,6 +1482,8 @@
     "core.downloaded": "Downloaded",
     "core.downloading": "Downloading",
     "core.edit": "Edit",
+    "core.editor.autosavesucceeded": "Draft saved.",
+    "core.editor.textrecovered": "A draft version of this text was automatically restored.",
     "core.emptysplit": "This page will appear blank if the left panel is empty or is loading.",
     "core.error": "Error",
     "core.errorchangecompletion": "An error occurred while changing the completion status. Please try again.",
diff --git a/src/core/editor/components/rich-text-editor/core-editor-rich-text-editor.html b/src/core/editor/components/rich-text-editor/core-editor-rich-text-editor.html
index ba2bd897f..6b3a503ed 100644
--- a/src/core/editor/components/rich-text-editor/core-editor-rich-text-editor.html
+++ b/src/core/editor/components/rich-text-editor/core-editor-rich-text-editor.html
@@ -1,7 +1,14 @@
-<div [hidden]="!rteEnabled" #editor contenteditable="true" class="core-rte-editor" tappable (focus)="showToolbar()" (longPress)="showToolbar()" (blur)="hideToolbar($event)" [attr.data-placeholder-text]="placeholder" role="textbox">
-</div>
+<div class="core-rte-editor-container">
+    <div [hidden]="!rteEnabled" #editor contenteditable="true" class="core-rte-editor" tappable (focus)="showToolbar()" (longPress)="showToolbar()" (blur)="hideToolbar($event)" [attr.data-placeholder-text]="placeholder" role="textbox">
+    </div>
 
-<ion-textarea [hidden]="rteEnabled" #textarea class="core-textarea" [placeholder]="placeholder" [attr.name]="name" ngControl="control" (ionChange)="onChange($event)" (focus)="showToolbar()" (longPress)="showToolbar()" (blur)="hideToolbar($event)" role="textbox"></ion-textarea>
+    <ion-textarea [hidden]="rteEnabled" #textarea class="core-textarea" [placeholder]="placeholder" [attr.name]="name" ngControl="control" (ionChange)="onChange($event)" (focus)="showToolbar()" (longPress)="showToolbar()" (blur)="hideToolbar($event)" role="textbox"></ion-textarea>
+
+    <div class="core-rte-info-message" *ngIf="infoMessage">
+        <ion-icon name="information-circle"></ion-icon>
+        {{ infoMessage | translate }}
+    </div>
+</div>
 
 <div #toolbar class="core-rte-toolbar" [class.toolbar-hidden]="toolbarHidden">
     <button *ngIf="toolbarArrows" class="toolbar-arrow" [class.toolbar-arrow-hidden]="toolbarPrevHidden" (click)="toolbarPrev($event)" (mousedown)="stopBubble($event)">
diff --git a/src/core/editor/components/rich-text-editor/rich-text-editor.scss b/src/core/editor/components/rich-text-editor/rich-text-editor.scss
index e2dd2ac07..5b929a3cf 100644
--- a/src/core/editor/components/rich-text-editor/rich-text-editor.scss
+++ b/src/core/editor/components/rich-text-editor/rich-text-editor.scss
@@ -10,6 +10,23 @@ ion-app.app-root core-rich-text-editor {
         background-color: $gray-darker;
     }
 
+    .core-rte-editor-container {
+        height: 100%;
+        position: relative;
+
+        .core-rte-info-message {
+            position: absolute;
+            bottom: 0;
+            padding: 3px;
+            border: 1px solid $info;
+            border-radius: 5px;
+
+            .icon {
+                color: $info;
+            }
+        }
+    }
+
     .core-rte-editor, .core-textarea {
         padding: 2px;
         margin: 2px;
@@ -147,7 +164,6 @@ ion-app.app-root core-rich-text-editor {
             border: none;
         }
     }
-
 }
 
 body.keyboard-is-open ion-app.app-root core-rich-text-editor {
diff --git a/src/core/editor/components/rich-text-editor/rich-text-editor.ts b/src/core/editor/components/rich-text-editor/rich-text-editor.ts
index 8520959c5..392054202 100644
--- a/src/core/editor/components/rich-text-editor/rich-text-editor.ts
+++ b/src/core/editor/components/rich-text-editor/rich-text-editor.ts
@@ -21,6 +21,7 @@ import { CoreDomUtilsProvider } from '@providers/utils/dom';
 import { CoreUrlUtilsProvider } from '@providers/utils/url';
 import { CoreUtilsProvider } from '@providers/utils/utils';
 import { CoreEventsProvider } from '@providers/events';
+import { CoreEditorOfflineProvider } from '../../providers/editor-offline';
 import { FormControl } from '@angular/forms';
 import { Subscription } from 'rxjs';
 
@@ -46,11 +47,19 @@ export class CoreEditorRichTextEditorComponent implements AfterContentInit, OnDe
     @Input() name = 'core-rich-text-editor'; // Name to set to the textarea.
     @Input() component?: string; // The component to link the files to.
     @Input() componentId?: number; // An ID to use in conjunction with the component.
+    @Input() autoSave?: boolean | string; // Whether to auto-save the contents in a draft. Defaults to true.
+    @Input() contextLevel?: string; // The context level of the text.
+    @Input() contextInstanceId?: number; // The instance ID related to the context.
+    @Input() elementId?: string; // An ID to set to the element.
+    @Input() draftExtraParams: {[name: string]: any}; // Extra params to identify the draft.
     @Output() contentChanged: EventEmitter<string>;
 
     @ViewChild('editor') editor: ElementRef; // WYSIWYG editor.
     @ViewChild('textarea') textarea: TextInput; // Textarea editor.
 
+    protected DRAFT_AUTOSAVE_FREQUENCY = 30000;
+    protected RESTORE_MESSAGE_CLEAR_TIME = 6000;
+    protected SAVE_MESSAGE_CLEAR_TIME = 2000;
     protected element: HTMLDivElement;
     protected editorElement: HTMLDivElement;
     protected kbHeight = 0; // Last known keyboard height.
@@ -84,16 +93,30 @@ export class CoreEditorRichTextEditorComponent implements AfterContentInit, OnDe
         ul: 'false',
         ol: 'false',
     };
+    infoMessage: string;
     protected isCurrentView = true;
     protected toolbarButtonWidth = 40;
     protected toolbarArrowWidth = 28;
+    protected pageInstance: string;
+    protected autoSaveInterval: NodeJS.Timer;
+    protected hideMessageTimeout: NodeJS.Timer;
+    protected lastDraft = '';
+    protected draftWasRestored = false;
 
-    constructor(private domUtils: CoreDomUtilsProvider, private urlUtils: CoreUrlUtilsProvider,
-            private sitesProvider: CoreSitesProvider, private filepoolProvider: CoreFilepoolProvider,
-            @Optional() private content: Content, elementRef: ElementRef, private events: CoreEventsProvider,
-            private utils: CoreUtilsProvider, private platform: Platform) {
+    constructor(
+            protected domUtils: CoreDomUtilsProvider,
+            protected urlUtils: CoreUrlUtilsProvider,
+            protected sitesProvider: CoreSitesProvider,
+            protected filepoolProvider: CoreFilepoolProvider,
+            @Optional() protected content: Content,
+            elementRef: ElementRef,
+            protected events: CoreEventsProvider,
+            protected utils: CoreUtilsProvider,
+            protected platform: Platform,
+            protected editorOffline: CoreEditorOfflineProvider) {
         this.contentChanged = new EventEmitter<string>();
         this.element = elementRef.nativeElement as HTMLDivElement;
+        this.pageInstance = 'app_' + Date.now(); // Generate a "unique" ID based on timestamp.
     }
 
     /**
@@ -117,7 +140,9 @@ export class CoreEditorRichTextEditorComponent implements AfterContentInit, OnDe
 
         // Listen for changes on the control to update the editor (if it is updated from outside of this component).
         this.valueChangeSubscription = this.control.valueChanges.subscribe((param) => {
-            this.setContent(param);
+            if (!this.draftWasRestored) {
+                this.setContent(param);
+            }
         });
 
         // Use paragraph on enter.
@@ -142,6 +167,20 @@ export class CoreEditorRichTextEditorComponent implements AfterContentInit, OnDe
         });
 
         this.updateToolbarButtons();
+
+        if (this.elementId) {
+            // Prepend elementId with 'id_' like in web. Don't use a setter for this because the value shouldn't change.
+            this.elementId = 'id_' + this.elementId;
+            this.element.setAttribute('id', this.elementId);
+        }
+
+        if (this.shouldAutoSaveDrafts()) {
+            // Recover drafts.
+            this.restoreDraft();
+
+            // Auto save drafts every certain time.
+            this.autoSaveDrafts();
+        }
     }
 
     /**
@@ -667,6 +706,97 @@ export class CoreEditorRichTextEditorComponent implements AfterContentInit, OnDe
         }
     }
 
+    /**
+     * Check if should auto save drafts.
+     *
+     * @return {boolean} Whether it should auto save drafts.
+     */
+    protected shouldAutoSaveDrafts(): boolean {
+        return !!this.sitesProvider.getCurrentSite() &&
+                (typeof this.autoSave == 'undefined' || this.utils.isTrueOrOne(this.autoSave)) &&
+                typeof this.contextLevel != 'undefined' &&
+                typeof this.contextInstanceId != 'undefined' &&
+                typeof this.elementId != 'undefined';
+    }
+
+    /**
+     * Restore a draft if there is any.
+     *
+     * @return Promise resolved when done.
+     */
+    protected async restoreDraft(): Promise<void> {
+        try {
+            let draftText = await this.editorOffline.resumeDraft(this.contextLevel, this.contextInstanceId, this.elementId,
+                    this.draftExtraParams, this.pageInstance);
+
+            if (typeof draftText == 'undefined') {
+                // No draft found.
+                return;
+            }
+
+            // Revert untouched editor contents to an empty string.
+            if (draftText == '<p></p>' || draftText == '<p><br></p>' || draftText == '<br>' ||
+                    draftText == '<p>&nbsp;</p>' || draftText == '<p><br>&nbsp;</p>') {
+                draftText = '';
+            }
+
+            if (draftText !== '' && draftText != this.control.value) {
+                // Restore the draft.
+                this.control.setValue(draftText, {emitEvent: false});
+                this.setContent(draftText);
+                this.lastDraft = draftText;
+                this.draftWasRestored = true;
+
+                // Notify the user.
+                this.showMessage('core.editor.textrecovered', this.RESTORE_MESSAGE_CLEAR_TIME);
+            }
+        } catch (error) {
+            // Ignore errors, shouldn't happen.
+        }
+    }
+
+    /**
+     * Automatically save drafts every certain time.
+     */
+    protected autoSaveDrafts(): void {
+        this.autoSaveInterval = setInterval(async () => {
+            const newText = this.control.value;
+
+            if (this.lastDraft == newText) {
+                // Text hasn't changed, nothing to save.
+                return;
+            }
+
+            try {
+                await this.editorOffline.saveDraft(this.contextLevel, this.contextInstanceId, this.elementId,
+                        this.draftExtraParams, this.pageInstance, newText);
+
+                // Draft saved, notify the user.
+                this.lastDraft = newText;
+                this.showMessage('core.editor.autosavesucceeded', this.SAVE_MESSAGE_CLEAR_TIME);
+            } catch (error) {
+                // Error saving draft.
+            }
+        }, this.DRAFT_AUTOSAVE_FREQUENCY);
+    }
+
+    /**
+     * Show a message.
+     *
+     * @param message Identifier of the message to display.
+     * @param timeout Number of milliseconds when to remove the message.
+     */
+    protected showMessage(message: string, timeout: number): void {
+        clearTimeout(this.hideMessageTimeout);
+
+        this.infoMessage = message;
+
+        this.hideMessageTimeout = setTimeout(() => {
+            this.hideMessageTimeout = null;
+            this.infoMessage = null;
+        }, timeout);
+    }
+
     /**
      * User entered the page that contains the component.
      */
@@ -692,5 +822,7 @@ export class CoreEditorRichTextEditorComponent implements AfterContentInit, OnDe
         document.removeEventListener('selectionchange', this.updateToolbarStyles);
         clearInterval(this.initHeightInterval);
         this.keyboardObs && this.keyboardObs.off();
+        clearInterval(this.autoSaveInterval);
+        clearTimeout(this.hideMessageTimeout);
     }
 }
diff --git a/src/core/editor/lang/en.json b/src/core/editor/lang/en.json
new file mode 100644
index 000000000..4e91f633c
--- /dev/null
+++ b/src/core/editor/lang/en.json
@@ -0,0 +1,4 @@
+{
+    "autosavesucceeded": "Draft saved.",
+    "textrecovered": "A draft version of this text was automatically restored."
+}
\ No newline at end of file
diff --git a/src/theme/variables.scss b/src/theme/variables.scss
index edca7c2ce..41179b964 100644
--- a/src/theme/variables.scss
+++ b/src/theme/variables.scss
@@ -134,11 +134,6 @@ $link-color:                 $blue !default;
 $background-color:           $gray-light !default;
 $subdued-text-color:         $gray-darker !default;
 
-$core-warning-color: colors($colors, warning) !default; // yellow.
-$core-success-color: colors($colors, success) !default; // green.
-$core-info-color: colors($colors, info) !default; // / blue.
-$core-error-color: colors($colors, alert) !default; // Red.
-
 $list-background-color:      $white !default;
 
 $tabs-background:            $gray-darker !default;