// (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, NgZone } from '@angular/core'; import { Platform, App, NavController, MenuController } from 'ionic-angular'; import { Keyboard } from '@ionic-native/keyboard'; import { Network } from '@ionic-native/network'; import { CoreDbProvider } from './db'; import { CoreLoggerProvider } from './logger'; import { CoreEventsProvider } from './events'; import { SQLiteDB } from '@classes/sqlitedb'; /** * Data stored for a redirect to another page/site. */ export interface CoreRedirectData { /** * ID of the site to load. * @type {string} */ siteId?: string; /** * Name of the page to redirect to. * @type {string} */ page?: string; /** * Params to pass to the page. * @type {any} */ params?: any; /** * Timestamp when this redirect was last modified. * @type {number} */ timemodified?: number; } /** * Factory to provide some global functionalities, like access to the global app database. * @description * Each service or component should be responsible of creating their own database tables. Example: * * constructor(appProvider: CoreAppProvider) { * this.appDB = appProvider.getDB(); * this.appDB.createTableFromSchema(this.tableSchema); * } */ @Injectable() export class CoreAppProvider { protected DBNAME = 'MoodleMobile'; protected db: SQLiteDB; protected logger; protected ssoAuthenticationPromise: Promise; protected isKeyboardShown = false; protected backActions = []; constructor(dbProvider: CoreDbProvider, private platform: Platform, private keyboard: Keyboard, private appCtrl: App, private network: Network, logger: CoreLoggerProvider, events: CoreEventsProvider, zone: NgZone, private menuCtrl: MenuController) { this.logger = logger.getInstance('CoreAppProvider'); this.db = dbProvider.getDB(this.DBNAME); this.keyboard.onKeyboardShow().subscribe((data) => { // Execute the callback in the Angular zone, so change detection doesn't stop working. zone.run(() => { document.body.classList.add('keyboard-is-open'); this.isKeyboardShown = true; // Error on iOS calculating size. // More info: https://github.com/ionic-team/ionic-plugin-keyboard/issues/276 . events.trigger(CoreEventsProvider.KEYBOARD_CHANGE, data.keyboardHeight); }); }); this.keyboard.onKeyboardHide().subscribe((data) => { // Execute the callback in the Angular zone, so change detection doesn't stop working. zone.run(() => { document.body.classList.remove('keyboard-is-open'); this.isKeyboardShown = false; events.trigger(CoreEventsProvider.KEYBOARD_CHANGE, 0); }); }); this.platform.registerBackButtonAction(() => { this.backButtonAction(); }, 100); } /** * Check if the browser supports mediaDevices.getUserMedia. * * @return {boolean} Whether the function is supported. */ canGetUserMedia(): boolean { return !!(navigator && navigator.mediaDevices && navigator.mediaDevices.getUserMedia); } /** * Check if the browser supports MediaRecorder. * * @return {boolean} Whether the function is supported. */ canRecordMedia(): boolean { return !!( window).MediaRecorder; } /** * Closes the keyboard. */ closeKeyboard(): void { if (this.isMobile()) { this.keyboard.hide(); } } /** * Get the application global database. * * @return {SQLiteDB} App's DB. */ getDB(): SQLiteDB { return this.db; } /** * Get the app's root NavController. * * @return {NavController} Root NavController. */ getRootNavController(): NavController { // Function getRootNav is deprecated. Get the first root nav, there should always be one. return this.appCtrl.getRootNavs()[0]; } /** * Checks if the app is running in a 64 bits desktop environment (not browser). * * @return {boolean} Whether the app is running in a 64 bits desktop environment (not browser). */ is64Bits(): boolean { const process = ( window).process; return this.isDesktop() && process.arch == 'x64'; } /** * Checks if the app is running in a desktop environment (not browser). * * @return {boolean} Whether the app is running in a desktop environment (not browser). */ isDesktop(): boolean { const process = ( window).process; return !!(process && process.versions && typeof process.versions.electron != 'undefined'); } /** * Check if the keyboard is visible. * * @return {boolean} Whether keyboard is visible. */ isKeyboardVisible(): boolean { return this.isKeyboardShown; } /** * Check if the app is running in a Linux environment. * * @return {boolean} Whether it's running in a Linux environment. */ isLinux(): boolean { if (!this.isDesktop()) { return false; } try { return require('os').platform().indexOf('linux') === 0; } catch (ex) { return false; } } /** * Check if the app is running in a Mac OS environment. * * @return {boolean} Whether it's running in a Mac OS environment. */ isMac(): boolean { if (!this.isDesktop()) { return false; } try { return require('os').platform().indexOf('darwin') === 0; } catch (ex) { return false; } } /** * Checks if the app is running in a mobile or tablet device (Cordova). * * @return {boolean} Whether the app is running in a mobile or tablet device. */ isMobile(): boolean { return this.platform.is('cordova'); } /** * Checks if the current window is wider than a mobile. * * @return {boolean} Whether the app the current window is wider than a mobile. */ isWide(): boolean { return this.platform.width() > 768; } /** * Returns whether we are online. * * @return {boolean} Whether the app is online. */ isOnline(): boolean { let online = this.network.type !== null && this.network.type != Connection.NONE && this.network.type != Connection.UNKNOWN; // Double check we are not online because we cannot rely 100% in Cordova APIs. Also, check it in browser. if (!online && navigator.onLine) { online = true; } return online; } /** * Check if device uses a limited connection. * * @return {boolean} Whether the device uses a limited connection. */ isNetworkAccessLimited(): boolean { const type = this.network.type; if (type === null) { // Plugin not defined, probably in browser. return false; } const limited = [Connection.CELL_2G, Connection.CELL_3G, Connection.CELL_4G, Connection.CELL]; return limited.indexOf(type) > -1; } /** * Check if device uses a wifi connection. * * @return {boolean} Whether the device uses a wifi connection. */ isWifi(): boolean { return this.isOnline() && !this.isNetworkAccessLimited(); } /** * Check if the app is running in a Windows environment. * * @return {boolean} Whether it's running in a Windows environment. */ isWindows(): boolean { if (!this.isDesktop()) { return false; } try { return require('os').platform().indexOf('win') === 0; } catch (ex) { return false; } } /** * Open the keyboard. */ openKeyboard(): void { // Open keyboard is not supported in desktop and in iOS. if (this.isMobile() && !this.platform.is('ios')) { this.keyboard.show(); } } /** * Start an SSO authentication process. * Please notice that this function should be called when the app receives the new token from the browser, * NOT when the browser is opened. */ startSSOAuthentication(): void { let cancelTimeout, resolvePromise; this.ssoAuthenticationPromise = new Promise((resolve, reject): void => { resolvePromise = resolve; // Resolve it automatically after 10 seconds (it should never take that long). cancelTimeout = setTimeout(() => { this.finishSSOAuthentication(); }, 10000); }); // Store the resolve function in the promise itself. ( this.ssoAuthenticationPromise).resolve = resolvePromise; // If the promise is resolved because finishSSOAuthentication is called, stop the cancel promise. this.ssoAuthenticationPromise.then(() => { clearTimeout(cancelTimeout); }); } /** * Finish an SSO authentication process. */ finishSSOAuthentication(): void { if (this.ssoAuthenticationPromise) { ( this.ssoAuthenticationPromise).resolve && ( this.ssoAuthenticationPromise).resolve(); this.ssoAuthenticationPromise = undefined; } } /** * Check if there's an ongoing SSO authentication process. * * @return {boolean} Whether there's a SSO authentication ongoing. */ isSSOAuthenticationOngoing(): boolean { return !!this.ssoAuthenticationPromise; } /** * Returns a promise that will be resolved once SSO authentication finishes. * * @return {Promise} Promise resolved once SSO authentication finishes. */ waitForSSOAuthentication(): Promise { return this.ssoAuthenticationPromise || Promise.resolve(); } /** * Retrieve redirect data. * * @return {CoreRedirectData} Object with siteid, state, params and timemodified. */ getRedirect(): CoreRedirectData { if (localStorage && localStorage.getItem) { try { const data: CoreRedirectData = { siteId: localStorage.getItem('CoreRedirectSiteId'), page: localStorage.getItem('CoreRedirectState'), params: localStorage.getItem('CoreRedirectParams'), timemodified: parseInt(localStorage.getItem('CoreRedirectTime'), 10) }; if (data.params) { data.params = JSON.parse(data.params); } return data; } catch (ex) { this.logger.error('Error loading redirect data:', ex); } } return {}; } /** * Store redirect params. * * @param {string} siteId Site ID. * @param {string} page Page to go. * @param {any} params Page params. */ storeRedirect(siteId: string, page: string, params: any): void { if (localStorage && localStorage.setItem) { try { localStorage.setItem('CoreRedirectSiteId', siteId); localStorage.setItem('CoreRedirectState', page); localStorage.setItem('CoreRedirectParams', JSON.stringify(params)); localStorage.setItem('CoreRedirectTime', String(Date.now())); } catch (ex) { // Ignore errors. } } } /** * Implement the backbutton actions pile. */ backButtonAction(): void { let x = 0; for (; x < this.backActions.length; x++) { if (this.backActions[x].priority < 1000) { break; } // Stop in the first action taken. if (this.backActions[x].fn()) { return; } } // Close open modals if any. if (this.menuCtrl && this.menuCtrl.isOpen()) { this.menuCtrl.close(); return; } // Remaining actions will have priority less than 1000. for (; x < this.backActions.length; x++) { if (this.backActions[x].priority < 500) { break; } // Stop in the first action taken. if (this.backActions[x].fn()) { return; } } // Nothing found, go back. const navPromise = this.appCtrl.navPop(); if (navPromise) { return; } // No views to go back to. // Remaining actions will have priority less than 500. for (; x < this.backActions.length; x++) { // Stop in the first action taken. if (this.backActions[x].fn()) { return; } } // Ionic will decide (exit the app). this.appCtrl.goBack(); } /** * The back button event is triggered when the user presses the native * platform's back button, also referred to as the "hardware" back button. * This event is only used within Cordova apps running on Android and * Windows platforms. This event is not fired on iOS since iOS doesn't come * with a hardware back button in the same sense an Android or Windows device * does. * * Registering a hardware back button action and setting a priority allows * apps to control which action should be called when the hardware back * button is pressed. This method decides which of the registered back button * actions has the highest priority and should be called. * * @param {Function} fn Called when the back button is pressed, * if this registered action has the highest priority. * @param {number} priority Set the priority for this action. All actions sorted by priority will be executed since one of * them returns true. * * Priorities higher or equal than 1000 will go before closing modals * * Priorities lower than 500 will only be executed if you are in the first state of the app (before exit). * @returns {Function} A function that, when called, will unregister * the back button action. */ registerBackButtonAction(fn: Function, priority: number = 0): Function { const action = { fn: fn, priority: priority }; this.backActions.push(action); this.backActions.sort((a, b) => { return b.priority - a.priority; }); return (): boolean => { const index = this.backActions.indexOf(action); return index >= 0 && !!this.backActions.splice(index, 1); }; } }