MOBILE-3947 core: Stop using deprecated guard interfaces

src/addons/messages/guards/index.ts

@@ -12,39 +12,23 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Injectable } from '@angular/core';
-import { ActivatedRouteSnapshot, CanActivate, UrlTree } from '@angular/router';
+import { ActivatedRouteSnapshot, CanActivateFn } from '@angular/router';
 import { Router } from '@singletons';
 import { AddonMessagesMainMenuHandlerService } from '../services/handlers/mainmenu';
 import { AddonMessages } from '../services/messages';
 
 /**
  * Guard to redirect to the right page based on the current Moodle site version.
+ *
+ * @returns Route.
  */
-@Injectable({ providedIn: 'root' })
-export class AddonMessagesIndexGuard implements CanActivate {
+export const messagesIndexGuard: CanActivateFn = async (route: ActivatedRouteSnapshot) => {
+    const enabled = AddonMessages.isGroupMessagingEnabled();
+    const path = `/main/${AddonMessagesMainMenuHandlerService.PAGE_NAME}/` + ( enabled ? 'group-conversations' : 'index');
 
-    /**
-     * @inheritdoc
-     */
-    canActivate(route: ActivatedRouteSnapshot): UrlTree {
-        return this.guard(route);
-    }
+    const newRoute = Router.parseUrl(path);
 
-    /**
-     * Check if there is a pending redirect and trigger it.
-     *
-     * @returns The redirection route.
-     */
-    private guard(route: ActivatedRouteSnapshot): UrlTree {
-        const enabled = AddonMessages.isGroupMessagingEnabled();
-        const path = `/main/${AddonMessagesMainMenuHandlerService.PAGE_NAME}/` + ( enabled ? 'group-conversations' : 'index');
+    newRoute.queryParams = route.queryParams;
 
-        const newRoute = Router.parseUrl(path);
-
-        newRoute.queryParams = route.queryParams;
-
-        return newRoute;
-    }
-
-}
+    return newRoute;
+};

src/addons/messages/messages-lazy.module.ts

@@ -28,7 +28,7 @@ import { CoreMainMenuComponentsModule } from '@features/mainmenu/components/comp
 import { buildTabMainRoutes } from '@features/mainmenu/mainmenu-tab-routing.module';
 import { CoreSearchComponentsModule } from '@features/search/components/components.module';
 import { CoreScreen } from '@services/screen';
-import { AddonMessagesIndexGuard } from './guards';
+import { messagesIndexGuard } from './guards';
 
 /**
  * Build module routes.
@@ -120,7 +120,7 @@ function buildRoutes(injector: Injector): Routes {
             loadChildren: () => import('./messages-settings-lazy.module').then(m => m.AddonMessagesSettingsLazyModule),
         },
         ...buildTabMainRoutes(injector, {
-            canActivate: [AddonMessagesIndexGuard],
+            canActivate: [messagesIndexGuard],
         }),
     ];
 }

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

@@ -16,7 +16,7 @@ import { conditionalRoutes } from '@/app/app-routing.module';
 import { CoreSharedModule } from '@/core/shared.module';
 import { NgModule } from '@angular/core';
 import { RouterModule, Routes } from '@angular/router';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { CoreScreen } from '@services/screen';
 import { AddonModAssignComponentsModule } from './components/components.module';
 import { AddonModAssignEditPage } from './pages/edit/edit';
@@ -32,7 +32,7 @@ const commonRoutes: Routes = [
     {
         path: ':courseId/:cmId/edit',
         component: AddonModAssignEditPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 
@@ -45,7 +45,7 @@ const mobileRoutes: Routes = [
     {
         path: ':courseId/:cmId/submission/:submitId',
         component: AddonModAssignSubmissionReviewPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 
@@ -58,7 +58,7 @@ const tabletRoutes: Routes = [
             {
                 path: ':submitId',
                 component: AddonModAssignSubmissionReviewPage,
-                canDeactivate: [CanLeaveGuard],
+                canDeactivate: [canLeaveGuard],
             },
         ],
     },

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

@@ -22,7 +22,7 @@ import { AddonModChatSessionMessagesPage } from './pages/session-messages/sessio
 import { CoreScreen } from '@services/screen';
 import { conditionalRoutes } from '@/app/app-routing.module';
 import { AddonModChatSessionsPage } from './pages/sessions/sessions';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 
 const commonRoutes: Routes = [
     {
@@ -32,7 +32,7 @@ const commonRoutes: Routes = [
     {
         path: ':courseId/:cmId/chat',
         component: AddonModChatChatPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 

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

@@ -18,7 +18,7 @@ import { RouterModule, Routes } from '@angular/router';
 import { CoreCommentsComponentsModule } from '@features/comments/components/components.module';
 import { CoreCompileHtmlComponentModule } from '@features/compile/components/compile-html/compile-html.module';
 import { CoreRatingComponentsModule } from '@features/rating/components/components.module';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { AddonModDataComponentsCompileModule } from './components/components-compile.module';
 import { AddonModDataComponentsModule } from './components/components.module';
 import { AddonModDataEditPage } from './pages/edit/edit';
@@ -33,12 +33,12 @@ const routes: Routes = [
     {
         path: ':courseId/:cmId/edit',
         component: AddonModDataEditPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
     {
         path: ':courseId/:cmId/edit/:entryId',
         component: AddonModDataEditPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
     {
         path: ':courseId/:cmId/:entryId',

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

@@ -22,7 +22,7 @@ import { conditionalRoutes } from '@/app/app-routing.module';
 import { CoreScreen } from '@services/screen';
 import { AddonModFeedbackAttemptPage } from '@addons/mod/feedback/pages/attempt/attempt';
 import { AddonModFeedbackFormPage } from '@addons/mod/feedback/pages/form/form';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { AddonModFeedbackNonRespondentsPage } from '@addons/mod/feedback/pages/nonrespondents/nonrespondents';
 
 const commonRoutes: Routes = [
@@ -33,7 +33,7 @@ const commonRoutes: Routes = [
     {
         path: ':courseId/:cmId/form',
         component: AddonModFeedbackFormPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
     {
         path: ':courseId/:cmId/nonrespondents',

src/addons/mod/forum/forum-discussion-lazy.module.ts

@@ -16,14 +16,14 @@ import { NgModule } from '@angular/core';
 import { RouterModule, Routes } from '@angular/router';
 
 import { AddonModForumComponentsModule } from '@addons/mod/forum/components/components.module';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { CoreSharedModule } from '@/core/shared.module';
 import { AddonModForumDiscussionPage } from '@addons/mod/forum/pages/discussion/discussion';
 
 const routes: Routes = [{
     path: '',
     component: AddonModForumDiscussionPage,
-    canDeactivate: [CanLeaveGuard],
+    canDeactivate: [canLeaveGuard],
 }];
 
 @NgModule({

src/addons/mod/forum/forum-new-discussion-lazy.module.ts

@@ -16,7 +16,7 @@ import { NgModule } from '@angular/core';
 import { RouterModule, Routes } from '@angular/router';
 
 import { AddonModForumComponentsModule } from '@addons/mod/forum/components/components.module';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { CoreEditorComponentsModule } from '@features/editor/components/components.module';
 import { CoreSharedModule } from '@/core/shared.module';
 import { AddonModForumNewDiscussionPage } from '@addons/mod/forum/pages/new-discussion/new-discussion';
@@ -24,7 +24,7 @@ import { AddonModForumNewDiscussionPage } from '@addons/mod/forum/pages/new-disc
 const routes: Routes = [{
     path: '',
     component: AddonModForumNewDiscussionPage,
-    canDeactivate: [CanLeaveGuard],
+    canDeactivate: [canLeaveGuard],
 }];
 
 @NgModule({

src/addons/mod/glossary/glossary-edit-lazy.module.ts

@@ -16,13 +16,13 @@ import { NgModule } from '@angular/core';
 import { CoreSharedModule } from '@/core/shared.module';
 import { CoreEditorComponentsModule } from '@features/editor/components/components.module';
 import { RouterModule, Routes } from '@angular/router';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { AddonModGlossaryEditPage } from '@addons/mod/glossary/pages/edit/edit';
 
 const routes: Routes = [{
     path: '',
     component: AddonModGlossaryEditPage,
-    canDeactivate: [CanLeaveGuard],
+    canDeactivate: [canLeaveGuard],
 }];
 
 @NgModule({

src/addons/mod/h5pactivity/h5pactivity-lazy.module.ts

@@ -16,7 +16,7 @@ import { NgModule } from '@angular/core';
 import { RouterModule, Routes } from '@angular/router';
 
 import { CoreSharedModule } from '@/core/shared.module';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { AddonModH5PActivityComponentsModule } from './components/components.module';
 import { AddonModH5PActivityIndexPage } from './pages/index/index';
 import { AddonModH5PActivityUserAttemptsPage } from '@addons/mod/h5pactivity/pages/user-attempts/user-attempts';
@@ -27,7 +27,7 @@ const routes: Routes = [
     {
         path: ':courseId/:cmId',
         component: AddonModH5PActivityIndexPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
     {
         path: ':courseId/:cmId/userattempts/:userId',

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

@@ -21,7 +21,7 @@ import { AddonModLessonComponentsModule } from './components/components.module';
 import { AddonModLessonIndexPage } from './pages/index';
 import { CoreEditorComponentsModule } from '@features/editor/components/components.module';
 import { AddonModLessonPlayerPage } from '@addons/mod/lesson/pages/player/player';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { AddonModLessonUserRetakePage } from '@addons/mod/lesson/pages/user-retake/user-retake';
 
 const routes: Routes = [
@@ -32,7 +32,7 @@ const routes: Routes = [
     {
         path: ':courseId/:cmId/player',
         component: AddonModLessonPlayerPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
     {
         path: ':courseId/:cmId/user-retake/:userId',

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

@@ -22,7 +22,7 @@ import { AddonModQuizIndexPage } from './pages/index';
 import { AddonModQuizAttemptPage } from '@addons/mod/quiz/pages/attempt/attempt';
 import { CoreQuestionComponentsModule } from '@features/question/components/components.module';
 import { AddonModQuizPlayerPage } from '@addons/mod/quiz/pages/player/player';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { AddonModQuizReviewPage } from '@addons/mod/quiz/pages/review/review';
 
 const routes: Routes = [
@@ -33,7 +33,7 @@ const routes: Routes = [
     {
         path: ':courseId/:cmId/player',
         component: AddonModQuizPlayerPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
     {
         path: ':courseId/:cmId/attempt/:attemptId',

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

@@ -18,7 +18,7 @@ import { CoreSharedModule } from '@/core/shared.module';
 import { AddonModWikiComponentsModule } from './components/components.module';
 import { AddonModWikiIndexPage } from './pages/index/index';
 import { CoreEditorComponentsModule } from '@features/editor/components/components.module';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { AddonModWikiEditPage } from './pages/edit/edit';
 
 const routes: Routes = [
@@ -33,7 +33,7 @@ const routes: Routes = [
     {
         path: ':courseId/:cmId/edit',
         component: AddonModWikiEditPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 

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

@@ -14,7 +14,7 @@
 
 import { NgModule } from '@angular/core';
 import { RouterModule, Routes } from '@angular/router';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 
 import { CoreSharedModule } from '@/core/shared.module';
 import { AddonModWorkshopIndexPage } from './pages/index/index';
@@ -32,17 +32,17 @@ const routes: Routes = [
     {
         path: ':courseId/:cmId/:submissionId',
         component: AddonModWorkshopSubmissionPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
     {
         path: ':courseId/:cmId/:submissionId/edit',
         component: AddonModWorkshopEditSubmissionPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
     {
         path: ':courseId/:cmId/:submissionId/:assessmentId',
         component: AddonModWorkshopAssessmentPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 

src/core/features/login/guards/has-sites.ts

@@ -12,50 +12,28 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Injectable } from '@angular/core';
-import { CanActivate, CanLoad, UrlTree } from '@angular/router';
-
+import { CanActivateFn } from '@angular/router';
 import { CoreSites } from '@services/sites';
 import { CoreUtils } from '@services/utils/utils';
 import { Router } from '@singletons';
-
 import { CoreLoginHelper } from '../services/login-helper';
 
-@Injectable({ providedIn: 'root' })
-export class CoreLoginHasSitesGuard implements CanActivate, CanLoad {
+/**
+ * Guard to check if the user has any sites stored.
+ *
+ * @returns True if user has sites, redirect route otherwise.
+ */
+export const hasSitesGuard: CanActivateFn = async () => {
+    const sites = await CoreUtils.ignoreErrors(CoreSites.getSites(), []);
 
-    /**
-     * @inheritdoc
-     */
-    canActivate(): Promise<true | UrlTree> {
-        return this.guard();
+    if (sites.length > 0) {
+        return true;
     }
 
-    /**
-     * @inheritdoc
-     */
-    canLoad(): Promise<true | UrlTree> {
-        return this.guard();
-    }
+    const [path, params] = await CoreLoginHelper.getAddSiteRouteInfo();
+    const route = Router.parseUrl(path);
 
-    /**
-     * Check if the user has any sites stored.
-     *
-     * @returns Promise resolved with true if it's not redirected or the redirection route.
-     */
-    private async guard(): Promise<true | UrlTree> {
-        const sites = await CoreUtils.ignoreErrors(CoreSites.getSites(), []);
+    route.queryParams = params;
 
-        if (sites.length > 0) {
-            return true;
-        }
-
-        const [path, params] = await CoreLoginHelper.getAddSiteRouteInfo();
-        const route = Router.parseUrl(path);
-
-        route.queryParams = params;
-
-        return route;
-    }
-
-}
+    return route;
+};

src/core/features/login/login-lazy.module.ts

@@ -16,7 +16,7 @@ import { NgModule } from '@angular/core';
 import { RouterModule, Routes } from '@angular/router';
 
 import { CoreSharedModule } from '@/core/shared.module';
-import { CoreLoginHasSitesGuard } from './guards/has-sites';
+import { hasSitesGuard } from './guards/has-sites';
 import { CoreLoginComponentsModule } from './components/components.module';
 import { CoreLoginHelper } from './services/login-helper';
 import { CoreLoginForgottenPasswordPage } from '@features/login/pages/forgotten-password/forgotten-password';
@@ -44,8 +44,7 @@ const routes: Routes = [
     {
         path: 'sites',
         component: CoreLoginSitesPage,
-        canLoad: [CoreLoginHasSitesGuard],
-        canActivate: [CoreLoginHasSitesGuard],
+        canActivate: [hasSitesGuard],
     },
     {
         path: 'forgottenpassword',

src/core/features/login/login.module.ts

@@ -17,7 +17,7 @@ import { Routes } from '@angular/router';
 
 import { AppRoutingModule } from '@/app/app-routing.module';
 import { CoreLoginHelper, CoreLoginHelperProvider } from './services/login-helper';
-import { CoreRedirectGuard } from '@guards/redirect';
+import { redirectGuard } from '@guards/redirect';
 import { CoreLoginCronHandler } from './services/handlers/cron';
 import { CoreCronDelegate } from '@services/cron';
 import { CoreEvents } from '@singletons/events';
@@ -30,8 +30,7 @@ const appRoutes: Routes = [
     {
         path: 'login',
         loadChildren: () => import('./login-lazy.module').then(m => m.CoreLoginLazyModule),
-        canActivate: [CoreRedirectGuard],
-        canLoad: [CoreRedirectGuard],
+        canActivate: [redirectGuard],
     },
 ];
 

src/core/features/mainmenu/guards/auth.ts

@@ -12,61 +12,41 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Injectable } from '@angular/core';
-import { CanLoad, CanActivate, UrlTree } from '@angular/router';
+import { CanActivateFn } from '@angular/router';
 import { CoreLoginHelper } from '@features/login/services/login-helper';
 import { CoreApp } from '@services/app';
 
 import { CoreSites } from '@services/sites';
 import { Router } from '@singletons';
 
-@Injectable({ providedIn: 'root' })
-export class CoreMainMenuAuthGuard implements CanLoad, CanActivate {
-
-    /**
-     * @inheritdoc
-     */
-    canActivate(): Promise<true | UrlTree> {
-        return this.guard();
+/**
+ * Guard to check if the user is authenticated.
+ *
+ * @returns True if user has sites, redirect route otherwise.
+ */
+export const authGuard: CanActivateFn = async () => {
+    if (!CoreSites.isLoggedIn()) {
+        return Router.parseUrl('/login');
     }
 
-    /**
-     * @inheritdoc
-     */
-    canLoad(): Promise<true | UrlTree> {
-        return this.guard();
-    }
+    if (CoreLoginHelper.isSiteLoggedOut()) {
+        // Send the user to reconnect page.
+        const newRoute = Router.parseUrl('/login/reconnect');
+        const siteId = CoreSites.getCurrentSiteId();
 
-    /**
-     * Check if the current user should be redirected to the authentication page.
-     *
-     * @returns Promise resolved with true if it's not redirected or the redirection route.
-     */
-    private async guard(): Promise<true | UrlTree> {
-        if (!CoreSites.isLoggedIn()) {
-            return Router.parseUrl('/login');
+        // Pass redirect data (if any and belongs to same site).
+        let redirect = CoreApp.consumeMemoryRedirect();
+        if (redirect?.siteId !== siteId) {
+            redirect = null;
         }
 
-        if (CoreLoginHelper.isSiteLoggedOut()) {
-            // Send the user to reconnect page.
-            const newRoute = Router.parseUrl('/login/reconnect');
-            const siteId = CoreSites.getCurrentSiteId();
+        newRoute.queryParams = {
+            siteId,
+            ...redirect,
+        };
 
-            // Pass redirect data (if any and belongs to same site).
-            let redirect = CoreApp.consumeMemoryRedirect();
-            if (redirect?.siteId !== siteId) {
-                redirect = null;
-            }
-
-            newRoute.queryParams = {
-                siteId,
-                ...redirect,
-            };
-
-            return newRoute;
-        }
-
-        return true;
+        return newRoute;
     }
 
-}
+    return true;
+};

src/core/features/mainmenu/mainmenu.module.ts

@@ -14,7 +14,7 @@
 
 import { APP_INITIALIZER, NgModule } from '@angular/core';
 import { Routes } from '@angular/router';
-import { CoreMainMenuAuthGuard } from '@features/mainmenu/guards/auth';
+import { authGuard } from '@features/mainmenu/guards/auth';
 
 import { AppRoutingModule } from '@/app/app-routing.module';
 
@@ -38,8 +38,7 @@ const appRoutes: Routes = [
     {
         path: 'main',
         loadChildren: () => import('./mainmenu-lazy.module').then(m => m.CoreMainMenuLazyModule),
-        canActivate: [CoreMainMenuAuthGuard],
-        canLoad: [CoreMainMenuAuthGuard],
+        canActivate: [authGuard],
     },
     {
         path: 'reload',

src/core/features/siteplugins/siteplugins.module.ts

@@ -23,7 +23,7 @@ import { CoreSitePluginsComponentsModule } from './components/components.module'
 import { CoreSitePluginsHelper } from './services/siteplugins-helper';
 import { CoreSharedModule } from '@/core/shared.module';
 import { CoreSitePluginsPluginPage } from '@features/siteplugins/pages/plugin/plugin';
-import { CanLeaveGuard } from '@guards/can-leave';
+import { canLeaveGuard } from '@guards/can-leave';
 import { CoreSitePluginsCourseOptionPage } from '@features/siteplugins/pages/course-option/course-option';
 import { CoreSitePluginsModuleIndexPage } from '@features/siteplugins/pages/module-index/module-index';
 
@@ -31,7 +31,7 @@ const routes: Routes = [
     {
         path: 'siteplugins/content/:component/:method/:hash',
         component: CoreSitePluginsPluginPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 
@@ -39,7 +39,7 @@ const homeRoutes: Routes = [
     {
         path: 'siteplugins/homecontent/:component/:method',
         component: CoreSitePluginsPluginPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 
@@ -47,7 +47,7 @@ const courseIndexRoutes: Routes = [
     {
         path: 'siteplugins/:handlerUniqueName',
         component: CoreSitePluginsCourseOptionPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 
@@ -55,7 +55,7 @@ const moduleRoutes: Routes = [
     {
         path: 'siteplugins/module/:courseId/:cmId',
         component: CoreSitePluginsModuleIndexPage,
-        canDeactivate: [CanLeaveGuard],
+        canDeactivate: [canLeaveGuard],
     },
 ];
 

src/core/guards/can-leave.ts

@@ -12,26 +12,30 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Injectable } from '@angular/core';
-import { CanDeactivate } from '@angular/router';
+import { CanDeactivateFn } from '@angular/router';
 import { CoreUtils } from '@services/utils/utils';
 
-@Injectable({ providedIn: 'root' })
-export class CanLeaveGuard implements CanDeactivate<unknown> {
+/**
+ * Check if a component implements the canLeave interface.
+ *
+ * @param component Component instance to check.
+ * @returns Whether it implements CanLeave interface.
+ */
+const isCanLeave = (component: unknown | null): component is CanLeave =>
+    component !== null && 'canLeave' in <CanLeave> component;
 
-    async canDeactivate(component: unknown | null): Promise<boolean> {
-        if (!this.isCanLeave(component)) {
-            return true;
-        }
-
-        return CoreUtils.ignoreErrors(component.canLeave(), false);
+/**
+ * Guard to check if the user can leave a page.
+ *
+ * @returns True if user has sites, redirect route otherwise.
+ */
+export const canLeaveGuard: CanDeactivateFn<unknown> = async (component: unknown) => {
+    if (!isCanLeave(component)) {
+        return true;
     }
 
-    isCanLeave(component: unknown | null): component is CanLeave {
-        return component !== null && 'canLeave' in <CanLeave> component;
-    }
-
-}
+    return CoreUtils.ignoreErrors(component.canLeave(), false);
+};
 
 export interface CanLeave {
     /**

src/core/guards/redirect.ts

@@ -12,38 +12,20 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Injectable } from '@angular/core';
-import { CanActivate, CanLoad, UrlTree } from '@angular/router';
+import { CanActivateFn } from '@angular/router';
 import { CoreApp } from '@services/app';
 import { CoreRedirectPayload } from '@services/navigator';
 import { CoreSites } from '@services/sites';
 import { Router } from '@singletons';
 import { CoreConstants } from '../constants';
 
-@Injectable({ providedIn: 'root' })
-export class CoreRedirectGuard implements CanLoad, CanActivate {
-
-    /**
-     * @inheritdoc
-     */
-    canLoad(): Promise<true | UrlTree> {
-        return this.guard();
-    }
-
-    /**
-     * @inheritdoc
-     */
-    canActivate(): Promise<true | UrlTree> {
-        return this.guard();
-    }
-
-    /**
-     * Check if there is a pending redirect and trigger it.
-     *
-     * @returns Promise resolved with true if it's not redirected or the redirection route.
-     */
-    private async guard(): Promise<true | UrlTree> {
-        const redirect = CoreApp.consumeMemoryRedirect();
+/**
+ * Guard to check if there is a pending redirect and trigger it.
+ *
+ * @returns True if there's no redirect, redirection route otherwise.
+ */
+export const redirectGuard: CanActivateFn = async () => {
+    const redirect = CoreApp.consumeMemoryRedirect();
         if (!redirect) {
             return true;
         }
@@ -81,6 +63,4 @@ export class CoreRedirectGuard implements CanLoad, CanActivate {
         route.queryParams = redirect.redirectOptions?.params || {};
 
         return route;
-    }
-
-}
+};