MOBILE-2302 mainmenu: Implement delegate and Main Menu page

src/core/login/providers/helper.ts

@@ -379,49 +379,54 @@ export class CoreLoginHelperProvider {
      * @return {Promise<any>} Promise resolved when done.
      */
     goToSiteInitialPage(navCtrl: NavController, setRoot?: boolean) : Promise<any> {
-        return this.isMyOverviewEnabled().then((myOverview) => {
-            let myCourses = !myOverview && this.isMyCoursesEnabled(),
-                site = this.sitesProvider.getCurrentSite(),
-                promise;
+        if (setRoot) {
+            return navCtrl.setRoot('CoreMainMenuPage', {}, {animate: false});
+        } else {
+            return navCtrl.push('CoreMainMenuPage');
+        }
+        // return this.isMyOverviewEnabled().then((myOverview) => {
+        //     let myCourses = !myOverview && this.isMyCoursesEnabled(),
+        //         site = this.sitesProvider.getCurrentSite(),
+        //         promise;
 
-            if (!site) {
-                return Promise.reject(null);
-            }
+        //     if (!site) {
+        //         return Promise.reject(null);
+        //     }
 
-            // Check if frontpage is needed to be shown. (If configured or if any of the other avalaible).
-            if ((site.getInfo() && site.getInfo().userhomepage === 0) || (!myCourses && !myOverview)) {
-                promise = this.isFrontpageEnabled();
-            } else {
-                promise = Promise.resolve(false);
-            }
+        //     // Check if frontpage is needed to be shown. (If configured or if any of the other avalaible).
+        //     if ((site.getInfo() && site.getInfo().userhomepage === 0) || (!myCourses && !myOverview)) {
+        //         promise = this.isFrontpageEnabled();
+        //     } else {
+        //         promise = Promise.resolve(false);
+        //     }
 
-            return promise.then((frontpage) => {
-                // Check avalaibility in priority order.
-                let pageName,
-                    params;
+        //     return promise.then((frontpage) => {
+        //         // Check avalaibility in priority order.
+        //         let pageName,
+        //             params;
 
-                // @todo Use real pages names when they are implemented.
-                if (frontpage) {
-                    pageName = 'Frontpage';
-                } else if (myOverview) {
-                    pageName = 'MyOverview';
-                } else if (myCourses) {
-                    pageName = 'MyCourses';
-                } else {
-                    // Anything else available, go to the user profile.
-                    pageName = 'User';
-                    params = {
-                        userId: site.getUserId()
-                    };
-                }
+        //         // @todo Use real pages names when they are implemented.
+        //         if (frontpage) {
+        //             pageName = 'Frontpage';
+        //         } else if (myOverview) {
+        //             pageName = 'MyOverview';
+        //         } else if (myCourses) {
+        //             pageName = 'MyCourses';
+        //         } else {
+        //             // Anything else available, go to the user profile.
+        //             pageName = 'User';
+        //             params = {
+        //                 userId: site.getUserId()
+        //             };
+        //         }
 
-                if (setRoot) {
-                    return navCtrl.setRoot(pageName, params, {animate: false});
-                } else {
-                    return navCtrl.push(pageName, params);
-                }
-            });
-        });
+        //         if (setRoot) {
+        //             return navCtrl.setRoot(pageName, params, {animate: false});
+        //         } else {
+        //             return navCtrl.push(pageName, params);
+        //         }
+        //     });
+        // });
     }
 
     /**

src/core/mainmenu/lang/ar.json

@@ -0,0 +1,8 @@
+{
+    "appsettings": "إعدادات التطبيق",
+    "changesite": "الخروج",
+    "help": "مساعدة",
+    "logout": "خروج",
+    "mycourses": "مقرراتي الدراسية",
+    "website": "الموقع"
+}

src/core/mainmenu/lang/bg.json

@@ -0,0 +1,8 @@
+{
+    "appsettings": "Настройки на приложението",
+    "changesite": "Изход",
+    "help": "Помощ",
+    "logout": "Изход",
+    "mycourses": "Моите курсове",
+    "website": "Уебсайт"
+}

src/core/mainmenu/lang/ca.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Paràmetres de l'aplicació",
+    "changesite": "Canvia de lloc",
+    "help": "Ajuda",
+    "logout": "Surt",
+    "mycourses": "Els meus cursos",
+    "togglemenu": "Canvia menú",
+    "website": "Lloc web"
+}

src/core/mainmenu/lang/cs.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Nastavení aplikace",
+    "changesite": "Změnit stránky",
+    "help": "Pomoc",
+    "logout": "Odhlásit se",
+    "mycourses": "Moje kurzy",
+    "togglemenu": "Přepnout nabídku",
+    "website": "Webová stránka"
+}

src/core/mainmenu/lang/da.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "App-indstillinger",
+    "changesite": "Skift side",
+    "help": "Hjælp",
+    "logout": "Log ud",
+    "mycourses": "Mine kurser",
+    "togglemenu": "Skift menu",
+    "website": "Websted"
+}

src/core/mainmenu/lang/de-du.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Einstellungen",
+    "changesite": "Website wechseln",
+    "help": "Hilfe",
+    "logout": "Abmelden",
+    "mycourses": "Meine Kurse",
+    "togglemenu": "Menü umschalten",
+    "website": "Website im Browser"
+}

src/core/mainmenu/lang/de.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Einstellungen",
+    "changesite": "Website wechseln",
+    "help": "Hilfe",
+    "logout": "Abmelden",
+    "mycourses": "Meine Kurse",
+    "togglemenu": "Menü umschalten",
+    "website": "Website im Browser"
+}

src/core/mainmenu/lang/el.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Ρυθμίσεις εφαρμογής",
+    "changesite": "Αλλαγή ιστότοπου",
+    "help": "Βοήθεια",
+    "logout": "Έξοδος",
+    "mycourses": "Τα μαθήματά μου",
+    "togglemenu": "Αλλαγή μενού",
+    "website": "Ιστότοπος"
+}

src/core/mainmenu/lang/en.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "App settings",
+    "changesite": "Change site",
+    "help": "Help",
+    "logout": "Log out",
+    "mycourses": "My courses",
+    "togglemenu": "Toggle menu",
+    "website": "Website"
+}

src/core/mainmenu/lang/es-mx.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Configuraciones del App",
+    "changesite": "Cambiar sitio",
+    "help": "Ayuda",
+    "logout": "Salir",
+    "mycourses": "Mis cursos",
+    "togglemenu": "Alternar menú",
+    "website": "Página web"
+}

src/core/mainmenu/lang/es.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Configuración de la aplicación",
+    "changesite": "Cambiar de sitio",
+    "help": "Ayuda",
+    "logout": "Salir",
+    "mycourses": "Mis cursos",
+    "togglemenu": "Cambiar menú",
+    "website": "Página web"
+}

src/core/mainmenu/lang/eu.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "App-aren ezarpenak",
+    "changesite": "Aldatu gunea",
+    "help": "Laguntza",
+    "logout": "Saioa amaitu",
+    "mycourses": "Nire ikastaroak",
+    "togglemenu": "Aldatu menua",
+    "website": "Webgunea"
+}

src/core/mainmenu/lang/fa.json

@@ -0,0 +1,8 @@
+{
+    "appsettings": "تنظیمات برنامه",
+    "changesite": "خروج",
+    "help": "راهنمایی",
+    "logout": "خروج از سایت",
+    "mycourses": "درس‌های من",
+    "website": "پایگاه اینترنتی"
+}

src/core/mainmenu/lang/fi.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Mobiilisovelluksen asetukset",
+    "changesite": "Vaihda sivustoa",
+    "help": "Ohje",
+    "logout": "Kirjaudu ulos",
+    "mycourses": "Omat kurssini",
+    "togglemenu": "Valikko päälle/pois",
+    "website": "Www-sivusto"
+}

src/core/mainmenu/lang/fr.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Réglages de l'app",
+    "changesite": "Changer de plateforme",
+    "help": "Aide",
+    "logout": "Déconnexion",
+    "mycourses": "Mes cours",
+    "togglemenu": "Menu",
+    "website": "Site web"
+}

src/core/mainmenu/lang/he.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "הגדרות יישומון",
+    "changesite": "התנתק",
+    "help": "עזרה",
+    "logout": "התנתקות",
+    "mycourses": "הקורסים שלי",
+    "togglemenu": "החלפת מצב תפריט",
+    "website": "אתר אינטרנט"
+}

src/core/mainmenu/lang/hr.json

@@ -0,0 +1,8 @@
+{
+    "appsettings": "Postavke aplikacije",
+    "changesite": "Promijeni poslužitelj",
+    "help": "Pomoć",
+    "logout": "Odjava",
+    "mycourses": "Moji e-kolegiji",
+    "website": "Web"
+}

src/core/mainmenu/lang/hu.json

@@ -0,0 +1,7 @@
+{
+    "changesite": "Kilépés",
+    "help": "Súgó",
+    "logout": "Kilépés",
+    "mycourses": "Kurzusaim",
+    "website": "Weboldal"
+}

src/core/mainmenu/lang/it.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Impostazioni app",
+    "changesite": "Cambia sito",
+    "help": "Aiuto",
+    "logout": "Esci",
+    "mycourses": "I miei corsi",
+    "togglemenu": "Attiva/disattiva menu",
+    "website": "Sito web"
+}

src/core/mainmenu/lang/ja.json

@@ -0,0 +1,8 @@
+{
+    "appsettings": "アプリ設定",
+    "changesite": "ログアウト",
+    "help": "ヘルプ",
+    "logout": "ログアウト",
+    "mycourses": "マイコース",
+    "website": "ウェブサイト"
+}

src/core/mainmenu/lang/lt.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Programėlės nustatymai",
+    "changesite": "Pakeisti svetainę",
+    "help": "Žinynas",
+    "logout": "Atsijungti",
+    "mycourses": "Mano kursai",
+    "togglemenu": "Perjungti",
+    "website": "Interneto svetainė"
+}

src/core/mainmenu/lang/mr.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "अॅप सेटिंग्ज",
+    "changesite": "साइट बदला",
+    "help": "मदत",
+    "logout": "लॉग-आउट",
+    "mycourses": "माझे कोर्सेस",
+    "togglemenu": "मेनू बदला",
+    "website": "वेबसाइट"
+}

src/core/mainmenu/lang/nl.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "App instellingen",
+    "changesite": "Naar andere site",
+    "help": "Help",
+    "logout": "Uitloggen",
+    "mycourses": "Mijn cursussen",
+    "togglemenu": "Menu schakelen",
+    "website": "Website"
+}

src/core/mainmenu/lang/no.json

@@ -0,0 +1,5 @@
+{
+    "help": "Hjelp",
+    "logout": "Logg ut",
+    "mycourses": "Mine kurs"
+}

src/core/mainmenu/lang/pl.json

@@ -0,0 +1,7 @@
+{
+    "changesite": "Wyloguj",
+    "help": "Pomoc",
+    "logout": "Wyloguj",
+    "mycourses": "Moje kursy",
+    "website": "Witryna"
+}

src/core/mainmenu/lang/pt-br.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Configurações do aplicativo",
+    "changesite": "Mudar site",
+    "help": "Ajuda",
+    "logout": "Sair",
+    "mycourses": "Meus cursos",
+    "togglemenu": "Alternar menu",
+    "website": "Site"
+}

src/core/mainmenu/lang/pt.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Configurações da aplicação",
+    "changesite": "Mudar de site",
+    "help": "Ajuda",
+    "logout": "Sair",
+    "mycourses": "As minhas disciplinas",
+    "togglemenu": "Alternar menu",
+    "website": "Site"
+}

src/core/mainmenu/lang/ro.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Setările aplicației",
+    "changesite": "Schimbați siteul",
+    "help": "Ajutor",
+    "logout": "Ieşire",
+    "mycourses": "Cursurile mele",
+    "togglemenu": "Meniul pentru comutare",
+    "website": "Website"
+}

src/core/mainmenu/lang/ru.json

@@ -0,0 +1,8 @@
+{
+    "appsettings": "Настройки приложения",
+    "changesite": "Выход",
+    "help": "Справка",
+    "logout": "Выход",
+    "mycourses": "Мои курсы",
+    "website": "Сайт"
+}

src/core/mainmenu/lang/sr-cr.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Подешавања апликације",
+    "changesite": "Промени сајт",
+    "help": "Помоћ",
+    "logout": "Одјава",
+    "mycourses": "Моји курсеви",
+    "togglemenu": "Укључи/искључи мени",
+    "website": "Веб сајт"
+}

src/core/mainmenu/lang/sr-lt.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Podešavanja aplikacije",
+    "changesite": "Promeni sajt",
+    "help": "Pomoć",
+    "logout": "Odjava",
+    "mycourses": "Moji kursevi",
+    "togglemenu": "Uključi/isključi meni",
+    "website": "Veb sajt"
+}

src/core/mainmenu/lang/sv.json

@@ -0,0 +1,8 @@
+{
+    "appsettings": "App inställningar",
+    "changesite": "Byt webbsida",
+    "help": "Hjälp",
+    "logout": "Logga ut",
+    "mycourses": "Mina kurser",
+    "website": "Webbsida"
+}

src/core/mainmenu/lang/tr.json

@@ -0,0 +1,7 @@
+{
+    "changesite": "Çıkış",
+    "help": "Yardım",
+    "logout": "Çıkış yap",
+    "mycourses": "Derslerim",
+    "website": "Websitesi"
+}

src/core/mainmenu/lang/uk.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "Налаштування додатку",
+    "changesite": "Змінити сайт",
+    "help": "Допомога",
+    "logout": "Вихід",
+    "mycourses": "Мої курси",
+    "togglemenu": "Перемикання меню",
+    "website": "Веб-сайт"
+}

src/core/mainmenu/lang/zh-cn.json

@@ -0,0 +1,7 @@
+{
+    "changesite": "注销",
+    "help": "帮助",
+    "logout": "注销",
+    "mycourses": "我的课程",
+    "website": "网站"
+}

src/core/mainmenu/lang/zh-tw.json

@@ -0,0 +1,9 @@
+{
+    "appsettings": "應用程式設定",
+    "changesite": "更換網站",
+    "help": "協助",
+    "logout": "更換網站",
+    "mycourses": "我的課程",
+    "togglemenu": "切換功能選單",
+    "website": "網站"
+}

src/core/mainmenu/mainmenu.module.ts

@@ -0,0 +1,27 @@
+// (C) Copyright 2015 Martin Dougiamas
+//
+// 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 { CoreMainMenuDelegate } from './providers/delegate';
+
+@NgModule({
+    declarations: [
+    ],
+    imports: [
+    ],
+    providers: [
+        CoreMainMenuDelegate,
+    ]
+})
+export class CoreMainMenuModule {}

src/core/mainmenu/pages/menu/menu.html

@@ -0,0 +1,3 @@
+<ion-tabs *ngIf="loaded">
+    <ion-tab *ngFor="let tab of tabs" [root]="tab.page" [tabTitle]="tab.title | translate" [tabIcon]="tab.icon" class="{{tab.class}}"></ion-tab>
+</ion-tabs>

src/core/mainmenu/pages/menu/menu.module.ts

@@ -0,0 +1,31 @@
+// (C) Copyright 2015 Martin Dougiamas
+//
+// 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 { IonicPageModule } from 'ionic-angular';
+import { TranslateModule } from '@ngx-translate/core';
+import { CoreMainMenuPage } from './menu';
+import { CoreMainMenuModule } from '../../mainmenu.module';
+
+@NgModule({
+    declarations: [
+        CoreMainMenuPage,
+    ],
+    imports: [
+        CoreMainMenuModule,
+        IonicPageModule.forChild(CoreMainMenuPage),
+        TranslateModule.forChild()
+    ],
+})
+export class CoreMainMenuPageModule {}

src/core/mainmenu/pages/menu/menu.scss

@@ -0,0 +1,3 @@
+page-core-mainmenu {
+
+}

src/core/mainmenu/pages/menu/menu.ts

@@ -0,0 +1,72 @@
+// (C) Copyright 2015 Martin Dougiamas
+//
+// 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, OnDestroy } from '@angular/core';
+import { IonicPage, NavController } from 'ionic-angular';
+import { CoreEventsProvider } from '../../../../providers/events';
+import { CoreSitesProvider } from '../../../../providers/sites';
+import { CoreMainMenuDelegate, CoreMainMenuHandlerData } from '../../providers/delegate';
+
+/**
+ * Page that displays the main menu of the app.
+ */
+@IonicPage()
+@Component({
+    selector: 'page-core-mainmenu',
+    templateUrl: 'menu.html',
+})
+export class CoreMainMenuPage implements OnDestroy {
+    tabs: CoreMainMenuHandlerData[];
+    loaded: boolean;
+    protected subscription;
+    protected moreTabData = {
+        page: 'CoreMainMenuMorePage',
+        title: 'core.more',
+        icon: 'more'
+    };
+    protected logoutObserver;
+
+    constructor(private menuDelegate: CoreMainMenuDelegate, private sitesProvider: CoreSitesProvider,
+            private navCtrl: NavController, eventsProvider: CoreEventsProvider) {
+
+        // Go to sites page when user is logged out.
+        this.logoutObserver = eventsProvider.on(CoreEventsProvider.LOGOUT, () => {
+            this.navCtrl.setRoot('CoreLoginSitesPage');
+        });
+    }
+
+    /**
+     * View loaded.
+     */
+    ionViewDidLoad() {
+        if (!this.sitesProvider.isLoggedIn()) {
+            this.navCtrl.setRoot('CoreLoginSitesPage');
+            return;
+        }
+
+        this.subscription = this.menuDelegate.getHandlers().subscribe((handlers) => {
+            this.tabs = handlers.slice(0, 4); // Get first 4.
+            this.tabs.push(this.moreTabData); // Add "More" tab.
+            this.loaded = this.menuDelegate.areHandlersLoaded();
+        });
+    }
+
+    /**
+     * Page destroyed.
+     */
+    ngOnDestroy() {
+        this.subscription && this.subscription.unsubscribe();
+        this.logoutObserver && this.logoutObserver.off();
+    }
+}

src/core/mainmenu/providers/delegate.ts

@@ -0,0 +1,202 @@
+// (C) Copyright 2015 Martin Dougiamas
+//
+// 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 { CoreEventsProvider } from '../../../providers/events';
+import { CoreLoggerProvider } from '../../../providers/logger';
+import { CoreSitesProvider } from '../../../providers/sites';
+import { Subject, BehaviorSubject } from 'rxjs';
+
+export interface CoreMainMenuHandler {
+    name: string; // Name of the handler.
+    priority: number; // The highest priority is displayed first.
+    isEnabled(): boolean|Promise<boolean>; // Whether or not the handler is enabled on a site level.
+    getDisplayData(): CoreMainMenuHandlerData; // Returns the data needed to render the handler.
+};
+
+export interface CoreMainMenuHandlerData {
+    page: string; // Name of the page.
+    title: string; // Title to display in the tab.
+    icon: string; // Name of the icon to display in the tab.
+    class?: string; // Class to add to the displayed handler.
+};
+
+/**
+ * Service to interact with plugins to be shown in the main menu. Provides functions to register a plugin
+ * and notify an update in the data.
+ */
+@Injectable()
+export class CoreMainMenuDelegate {
+    protected logger;
+    protected handlers: {[s: string]: CoreMainMenuHandler} = {};
+    protected enabledHandlers: {[s: string]: CoreMainMenuHandler} = {};
+    protected loaded = false;
+    protected lastUpdateHandlersStart: number;
+    protected siteHandlers: Subject<CoreMainMenuHandlerData[]> = new BehaviorSubject<CoreMainMenuHandlerData[]>([]);
+
+    constructor(logger: CoreLoggerProvider, private sitesProvider: CoreSitesProvider, eventsProvider: CoreEventsProvider) {
+        this.logger = logger.getInstance('CoreMainMenuDelegate');
+
+        eventsProvider.on(CoreEventsProvider.LOGIN, this.updateHandlers.bind(this));
+        eventsProvider.on(CoreEventsProvider.SITE_UPDATED, this.updateHandlers.bind(this));
+        eventsProvider.on(CoreEventsProvider.REMOTE_ADDONS_LOADED, this.updateHandlers.bind(this));
+        eventsProvider.on(CoreEventsProvider.LOGOUT, this.clearSiteHandlers.bind(this));
+    }
+
+    /**
+     * Check if handlers are loaded.
+     *
+     * @return {boolean} True if handlers are loaded, false otherwise.
+     */
+    areHandlersLoaded() : boolean {
+        return this.loaded;
+    }
+
+    /**
+     * Clear current site handlers. Reserved for core use.
+     */
+    protected clearSiteHandlers() {
+        this.loaded = false;
+        this.siteHandlers.next([]);
+    }
+
+    /**
+     * Get the handlers for the current site.
+     *
+     * @return {Subject<CoreMainMenuHandlerData[]>} An observable that will receive the handlers.
+     */
+    getHandlers() : Subject<CoreMainMenuHandlerData[]> {
+        return this.siteHandlers;
+    }
+
+    /**
+     * Check if a time belongs to the last update handlers call.
+     * This is to handle the cases where updateHandlers don't finish in the same order as they're called.
+     *
+     * @param {number} time Time to check.
+     * @return {boolean} Whether it's the last call.
+     */
+    isLastUpdateCall(time: number) : boolean {
+        if (!this.lastUpdateHandlersStart) {
+            return true;
+        }
+        return time == this.lastUpdateHandlersStart;
+    }
+
+    /**
+     * Register a handler.
+     *
+     * @param {CoreInitHandler} handler The handler to register.
+     * @return {boolean} True if registered successfully, false otherwise.
+     */
+    registerHandler(handler: CoreMainMenuHandler) : boolean {
+        if (typeof this.handlers[handler.name] !== 'undefined') {
+            this.logger.log(`Addon 'handler.name' already registered`);
+            return false;
+        }
+        this.logger.log(`Registered addon 'handler.name'`);
+        this.handlers[handler.name] = handler;
+        return true;
+    }
+
+    /**
+     * Update the handler for the current site.
+     *
+     * @param {CoreInitHandler} handler The handler to check.
+     * @param {number} time Time this update process started.
+     * @return {Promise<void>} Resolved when done.
+     */
+    protected updateHandler(handler: CoreMainMenuHandler, time: number) : Promise<void> {
+        let promise,
+            siteId = this.sitesProvider.getCurrentSiteId(),
+            currentSite = this.sitesProvider.getCurrentSite();
+
+        if (!this.sitesProvider.isLoggedIn()) {
+            promise = Promise.reject(null);
+        } else if (currentSite.isFeatureDisabled('$mmSideMenuDelegate_' + handler.name)) {
+            promise = Promise.resolve(false);
+        } else {
+            promise = Promise.resolve(handler.isEnabled());
+        }
+
+        // Checks if the handler is enabled.
+        return promise.catch(() => {
+            return false;
+        }).then((enabled: boolean) => {
+            // Verify that this call is the last one that was started.
+            // Check that site hasn't changed since the check started.
+            if (this.isLastUpdateCall(time) && this.sitesProvider.getCurrentSiteId() === siteId) {
+                if (enabled) {
+                    this.enabledHandlers[handler.name] = handler;
+                } else {
+                    delete this.enabledHandlers[handler.name];
+                }
+            }
+        });
+    }
+
+    /**
+     * Update the handlers for the current site.
+     *
+     * @return {Promise<void>} Resolved when done.
+     */
+    protected updateHandlers() : Promise<void> {
+        let promises = [],
+            now = Date.now();
+
+        this.logger.debug('Updating handlers for current site.');
+
+        this.lastUpdateHandlersStart = now;
+
+        // Loop over all the handlers.
+        for (let name in this.handlers) {
+            promises.push(this.updateHandler(this.handlers[name], now));
+        }
+
+        return Promise.all(promises).then(() => {
+            return true;
+        }, () => {
+            // Never reject.
+            return true;
+        }).then(() => {
+            // Verify that this call is the last one that was started.
+            if (this.isLastUpdateCall(now)) {
+                let handlersData: any[] = [];
+
+                for (let name in this.enabledHandlers) {
+                    let handler = this.enabledHandlers[name],
+                        data = handler.getDisplayData();
+
+                    handlersData.push({
+                        data: data,
+                        priority: handler.priority
+                    });
+                }
+
+                // Sort them by priority.
+                handlersData.sort((a, b) => {
+                    return b.priority - a.priority;
+                });
+
+                // Return only the display data.
+                let displayData = handlersData.map((item) => {
+                    return item.data;
+                });
+
+                this.loaded = true;
+                this.siteHandlers.next(displayData);
+            }
+        });
+    }
+}

src/lang/en.json

@@ -133,6 +133,7 @@
     "mod_url": "URL",
     "mod_wiki": "Wiki",
     "mod_workshop": "Workshop",
+    "more": "More",
     "mygroups": "My groups",
     "name": "Name",
     "nograde": "No grade",