PLT-4644 Update webrtc client (#4922)

* PLT-4644 Update webrtc client

* update webrtc-adapter

* Use default ice server if none is provided

webapp/client/webrtc_client.jsx

@@ -1,145 +0,0 @@
-// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
-// See License.txt for license information.
-
-export default class WebrtcClient {
-    constructor() {
-        this.init = this.init.bind(this);
-        this.listDevices = this.listDevices.bind(this);
-        this.isExtensionEnabled = this.isExtensionEnabled.bind(this);
-        this.isWebrtcSupported = this.isWebrtcSupported.bind(this);
-
-        this.initDone = false;
-        this.sessions = {};
-    }
-
-    noop() {} //eslint-disable-line no-empty-function
-
-    // this function is going to be needed when we enable screen sharing
-    isExtensionEnabled() {
-        if (window.navigator.userAgent.match('Chrome')) {
-            const chromever = parseInt(window.navigator.userAgent.match(/Chrome\/(.*) /)[1], 10);
-            let maxver = 33;
-            if (window.navigator.userAgent.match('Linux')) {
-                maxver = 35;	// "known" crash in chrome 34 and 35 on linux
-            }
-            if (chromever >= 26 && chromever <= maxver) {
-                // Older versions of Chrome don't support this extension-based approach, so lie
-                return true;
-            }
-            return (document.getElementById('mattermost-extension-installed') !== null);
-        }
-
-        // Firefox of others, no need for the extension (but this doesn't mean it will work)
-        return true;
-    }
-
-    init(opts) {
-        const options = opts || {};
-
-        if (this.initDone === true) {
-            // Already initialized
-            return;
-        }
-
-        this.trace = this.noop;
-        this.debug = this.noop;
-        this.log = this.noop;
-        this.warn = this.noop;
-        this.error = this.noop;
-
-        /* eslint-disable */
-        if (options.debug === true || options.debug === 'all') {
-            // Enable all debugging levels
-            this.trace = console.trace.bind(console);
-            this.debug = console.debug.bind(console);
-            this.log = console.log.bind(console);
-            this.warn = console.warn.bind(console);
-            this.error = console.error.bind(console);
-        } else if (Array.isArray(options.debug)) {
-            for (const i in options.debug) {
-                if (options.debug.hasOwnProperty(i)) {
-                    const d = options.debug[i];
-                    switch (d) {
-                    case 'trace':
-                        this.trace = console.trace.bind(console);
-                        break;
-                    case 'debug':
-                        this.debug = console.debug.bind(console);
-                        break;
-                    case 'log':
-                        this.log = console.log.bind(console);
-                        break;
-                    case 'warn':
-                        this.warn = console.warn.bind(console);
-                        break;
-                    case 'error':
-                        this.error = console.error.bind(console);
-                        break;
-                    default:
-                        console.error("Unknown debugging option '" + d + "' (supported: 'trace', 'debug', 'log', warn', 'error')");
-                        break;
-                    }
-                }
-            }
-        }
-        /* eslint-enable */
-
-        this.log('Initializing WebRTC Client library');
-
-        // Detect tab close
-        window.onbeforeunload = () => {
-            this.log('Closing window');
-            for (const s in this.sessions) {
-                if (this.sessions.hasOwnProperty(s)) {
-                    if (this.sessions[s] && this.sessions[s].destroyOnUnload) {
-                        this.log('Destroying session ' + s);
-                        this.sessions[s].destroy();
-                    }
-                }
-            }
-        };
-
-        this.initDone = true;
-    }
-
-    // Helper method to enumerate devices
-    listDevices(cb) {
-        const callback = (typeof cb == 'function') ? cb : this.noop;
-
-        if (navigator.mediaDevices) {
-            navigator.getUserMedia({audio: true, video: true}, (stream) => {
-                navigator.mediaDevices.enumerateDevices().then((devices) => {
-                    this.debug(devices);
-                    callback(devices);
-
-                    // Get rid of the now useless stream
-                    try {
-                        stream.stop();
-                    } catch (e) {
-                        this.error(e);
-                    }
-
-                    this.stopMedia(stream);
-                });
-            }, (err) => {
-                this.error(err);
-                callback([]);
-            });
-        } else {
-            this.warn('navigator.mediaDevices unavailable');
-            callback([]);
-        }
-    }
-
-    // Helper method to check whether WebRTC is supported by this browser
-    isWebrtcSupported() {
-        return window.RTCPeerConnection && navigator.getUserMedia;
-    }
-
-    stopMedia(stream) {
-        const tracks = stream.getTracks();
-        tracks.forEach((track) => {
-            track.stop();
-        });
-    }
-}