b86df7a8e3
Multiple requests for checkUserRemoteControlSupport can be in flight simultaneously. Order of promise resolution is not guaranteed. It is possible for Request A and Request B to be in flight and then Request B's promise chain resolves first. Request A could have encountered errors and then resolve. Then what could happen is checkUserRemoteControlSupport returns true for remote control support due to Request B and the UI updates. But then checkUserRemoteControlSupport returns false for remote control support due to Request A's error and the UI updates to hide remote control.
100 lines
2.7 KiB
JavaScript
100 lines
2.7 KiB
JavaScript
/* @flow */
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import EventEmitter from 'events';
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import { getLogger } from 'jitsi-meet-logger';
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import { DISCO_REMOTE_CONTROL_FEATURE }
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from '../../service/remotecontrol/Constants';
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import * as RemoteControlEvents
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from '../../service/remotecontrol/RemoteControlEvents';
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import Controller from './Controller';
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import Receiver from './Receiver';
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const logger = getLogger(__filename);
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declare var APP: Object;
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declare var config: Object;
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/**
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* Implements the remote control functionality.
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*/
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class RemoteControl extends EventEmitter {
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_active: boolean;
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_initialized: boolean;
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controller: Controller;
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receiver: Receiver;
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/**
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* Constructs new instance. Creates controller and receiver properties.
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*/
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constructor() {
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super();
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this.controller = new Controller();
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this._active = false;
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this._initialized = false;
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this.controller.on(RemoteControlEvents.ACTIVE_CHANGED, active => {
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this.active = active;
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});
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}
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/**
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* Sets the remote control session active status.
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*
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* @param {boolean} isActive - True - if the controller or the receiver is
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* currently in remote control session and false otherwise.
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* @returns {void}
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*/
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set active(isActive: boolean) {
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this._active = isActive;
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this.emit(RemoteControlEvents.ACTIVE_CHANGED, isActive);
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}
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/**
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* Returns the remote control session active status.
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*
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* @returns {boolean} - True - if the controller or the receiver is
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* currently in remote control session and false otherwise.
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*/
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get active(): boolean {
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return this._active;
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}
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/**
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* Initializes the remote control - checks if the remote control should be
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* enabled or not.
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*
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* @returns {void}
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*/
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init() {
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if (config.disableRemoteControl
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|| this._initialized
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|| !APP.conference.isDesktopSharingEnabled) {
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return;
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}
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logger.log('Initializing remote control.');
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this._initialized = true;
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this.controller.enable(true);
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this.receiver = new Receiver();
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this.receiver.on(RemoteControlEvents.ACTIVE_CHANGED, active => {
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this.active = active;
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});
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}
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/**
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* Checks whether the passed user supports remote control or not.
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*
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* @param {JitsiParticipant} user - The user to be tested.
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* @returns {Promise<boolean>} The promise will be resolved with true if
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* the user supports remote control and with false if not.
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*/
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checkUserRemoteControlSupport(user: Object) {
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return user.getFeatures()
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.then(features => features.has(DISCO_REMOTE_CONTROL_FEATURE));
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}
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}
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export default new RemoteControl();
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