WebRTC audio/video call and conferencing server.
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/*
* Spreed WebRTC.
* Copyright (C) 2013-2014 struktur AG
*
* This file is part of Spreed WebRTC.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
define(['jquery', 'underscore', 'angular', 'bigscreen', 'moment', 'sjcl', 'modernizr', 'webrtc.adapter'], function($, _, angular, BigScreen, moment, sjcl, Modernizr) {
return ["$scope", "$rootScope", "$element", "$window", "$timeout", "safeDisplayName", "safeApply", "mediaStream", "appData", "playSound", "desktopNotify", "alertify", "toastr", "translation", "fileDownload", "localStorage", "screensharing", "userSettingsData", "localStatus", "dialogs", "rooms", function($scope, $rootScope, $element, $window, $timeout, safeDisplayName, safeApply, mediaStream, appData, playSound, desktopNotify, alertify, toastr, translation, fileDownload, localStorage, screensharing, userSettingsData, localStatus, dialogs, rooms) {
/*console.log("route", $route, $routeParams, $location);*/
// Disable drag and drop.
$($window).on("dragover dragenter drop", function(event) {
event.preventDefault();
});
// Avoid accidential reloads or exits when in a call.
var manualUnload = false;
$($window).on("beforeunload", function(event) {
if (manualUnload || !$scope.peer) {
return;
}
return translation._("Close this window and disconnect?");
});
// Enable app full screen listener.
$("#bar .logo").on("doubletap dblclick", _.debounce(function() {
if (BigScreen.enabled) {
BigScreen.toggle($("body").get(0));
}
}, 100, true));
// Load default sounds.
playSound.initialize({
urls: ['sounds/sprite1.ogg', 'sounds/sprite1.mp3'],
sprite: {
"connect1": [
0,
5179],
"end1": [
12892,
6199],
"entry1": [
8387,
3000],
"leaving1": [
5228,
2126],
"message1": [
19140,
816],
"question1": [
20006,
3313],
"ringtone1": [
7403,
935],
"whistle1": [
11437,
1405]
}
}, null, {
"ring": "whistle1",
"joined": "entry1",
"left": "leaving1",
"end": "end1",
"dial": "ringtone1",
"connect": "connect1",
"prompt": "question1"
});
appData.set($scope);
var videoQualityMap = {
tiny: {
maxWidth: 80,
maxHeight: 45
},
low: {
maxWidth: 320,
maxHeight: 180
},
high: {
maxWidth: 640,
maxHeight: 360
},
hd: {
minWidth: 1280,
minHeight: 720
},
fullhd: {
minWidth: 1920,
minHeight: 1080
}
}
var displayName = safeDisplayName;
// Init STUN and TURN servers.
$scope.stun = mediaStream.config.StunURIs || [];
if (!$scope.stun.length) {
$scope.stun.push("stun:stun.l.google.com:19302")
}
$scope.turn = {}; // TURN servers are set on received.self.
// Add browser details for easy access.
$scope.isChrome = $window.webrtcDetectedBrowser === "chrome";
$scope.webrtcDetectedBrowser = $window.webrtcDetectedBrowser;
$scope.webrtcDetectedVersion = $window.webrtcDetectedVersion;
// Add support status.
$scope.supported = {
screensharing: screensharing.supported,
renderToAssociatedSink: $window.navigator.platform.indexOf("Win") === 0
}
// Default scope data.
$scope.status = "initializing";
$scope.id = $scope.myid = null;
$scope.userid = $scope.myuserid = null;
$scope.suserid = null;
$scope.peer = null;
$scope.dialing = null;
$scope.conference = null;
$scope.conferencePeers = [];
$scope.incoming = null;
$scope.microphoneMute = false;
$scope.cameraMute = false;
$scope.layout = {
main: null,
};
$scope.chatMessagesUnseen = 0;
$scope.autoAccept = null;
$scope.isCollapsed = true;
$scope.defaults = {
displayName: null,
buddyPicture: null,
message: null,
settings: {
videoQuality: "high",
stereo: true,
maxFrameRate: 20,
defaultRoom: "",
language: "",
audioRenderToAssociatedSkin: true,
experimental: {
enabled: false,
audioEchoCancellation2: true,
audioAutoGainControl2: true,
audioNoiseSuppression2: true,
audioTypingNoiseDetection: true,
videoLeakyBucket: true,
videoNoiseReduction: false,
videoCpuOveruseDetection: true
}
}
};
$scope.master = angular.copy($scope.defaults);
// Data voids.
var resurrect = null;
var reconnecting = false;
var connected = false;
var autoreconnect = true;
$scope.update = function(user) {
$scope.master = angular.copy(user);
if (connected) {
$scope.updateStatus();
}
$scope.refreshWebrtcSettings();
};
$scope.reset = function() {
$scope.user = angular.copy($scope.master);
};
$scope.reset(); // Call once for bootstrap.
$scope.setStatus = function(status) {
// This is the connection status to signaling server.
$scope.$emit("status", status);
};
$scope.getStatus = function() {
return $scope.status;
};
$scope.updateStatus = function(clear) {
// This is the user status.
var status = {
displayName: $scope.master.displayName || null,
buddyPicture: $scope.master.buddyPicture || null,
message: $scope.master.message || null
}
if (clear) {
localStatus.clear();
}
localStatus.update(status);
};
$scope.refreshWebrtcSettings = function() {
if (!$window.webrtcDetectedBrowser) {
console.warn("This is not a WebRTC capable browser.");
return;
}
var settings = $scope.master.settings;
// Create iceServers from scope settings.
var iceServers = [];
var iceServer;
if ($scope.stun.length) {
iceServer = $window.createIceServers($scope.stun);
if (iceServer.length) {
iceServers.push.apply(iceServers, iceServer);
}
}
if ($scope.turn.urls && $scope.turn.urls.length) {
iceServer = $window.createIceServers($scope.turn.urls, $scope.turn.username, $scope.turn.password);
if (iceServer.length) {
iceServers.push.apply(iceServers, iceServer);
}
}
var audioConstraints = [];
var videoConstraints = [];
var videoConstraintsMandatory = {};
var screensharingConstraints = [];
var pushmulti = function(arrays, data) {
_.each(arrays, function(a) {
a.push(data);
});
};
// Chrome only constraints.
if ($scope.isChrome) {
// Audio settings.
// For defaults in Chromium see https://code.google.com/p/webrtc/source/browse/trunk/talk/media/webrtc/webrtcvoiceengine.cc#225
// Experimental audio settings.
if (settings.experimental.enabled) {
audioConstraints.push({
googEchoCancellation: true // defaults to true
});
audioConstraints.push({
googEchoCancellation2: settings.experimental.audioEchoCancellation2 && true // defaults to false in Chrome
});
audioConstraints.push({
googAutoGainControl: true // defaults to true
});
audioConstraints.push({
googAutoGainControl2: settings.experimental.audioAutoGainControl2 && true // defaults to false in Chrome
});
audioConstraints.push({
googNoiseSuppression: true // defaults to true
});
audioConstraints.push({
googgNoiseSuppression2: settings.experimental.audioNoiseSuppression2 && true // defaults to false in Chrome
});
audioConstraints.push({
googHighpassFilter: true // defaults to true
});
audioConstraints.push({
googTypingNoiseDetection: settings.experimental.audioTypingNoiseDetection && true // defaults to true in Chrome
});
}
if ($scope.supported.renderToAssociatedSink) {
audioConstraints.push({
// When true uses the default communications device on Windows.
// https://codereview.chromium.org/155863003
googDucking: true // defaults to true on Windows.
});
audioConstraints.push({
// Chrome will start rendering mediastream output to an output device that's associated with
// the input stream that was opened via getUserMedia.
// https://chromiumcodereview.appspot.com/23558010
chromeRenderToAssociatedSink: settings.audioRenderToAssociatedSkin && true // defaults to false in Chrome
});
}
// Select microphone device by id.
if (settings.microphoneId) {
audioConstraints.push({
sourceId: settings.microphoneId
});
}
// Select camera by device id.
if (settings.cameraId) {
videoConstraints.push({
sourceId: settings.cameraId
});
}
// Video settings.
if (settings.experimental.enabled) {
// Experimental video settings.
pushmulti([videoConstraints, screensharingConstraints], {
// Changes the way the video encoding adapts to the available bandwidth.
// https://code.google.com/p/webrtc/issues/detail?id=3351
googLeakyBucket: settings.experimental.videoLeakyBucket && true // defaults to false in Chrome
});
pushmulti([videoConstraints, screensharingConstraints], {
// Removes the noise in the captured video stream at the expense of CPU.
googNoiseReduction: settings.experimental.videoNoiseReduction && true // defaults to false in Chrome
});
pushmulti([videoConstraints, screensharingConstraints], {
googCpuOveruseDetection: settings.experimental.videoCpuOveruseDetection && true // defaults to true in Chrome
});
}
// Video.
videoConstraintsMandatory = $.extend(videoConstraintsMandatory, videoQualityMap[settings.videoQuality]);
// Not supported as of Firefox 27.
if (settings.maxFrameRate && settings.maxFrameRate != "auto") {
videoConstraintsMandatory.maxFrameRate = parseInt(settings.maxFrameRate, 10);
}
}
// Apply the shit.
mediaStream.webrtc.settings.stereo = settings.stereo;
mediaStream.webrtc.settings.mediaConstraints.video.mandatory = videoConstraintsMandatory;
mediaStream.webrtc.settings.mediaConstraints.video.optional = videoConstraints;
mediaStream.webrtc.settings.mediaConstraints.audio = {
optional: audioConstraints
};
mediaStream.webrtc.settings.pcConfig.iceServers = iceServers;
mediaStream.webrtc.settings.screensharing.mediaConstraints.video.optional = screensharingConstraints;
// Inject optional stuff.
var optionalPcConstraints = mediaStream.webrtc.settings.pcConstraints.optional = [];
if ($window.webrtcDetectedBrowser === "chrome") {
// NOTE(longsleep): We can always enable SCTP data channels, as we have a workaround
// using the "active" event for Firefox < 27.
// SCTP does not work correctly with Chrome 31. Require M32.
if ($window.webrtcDetectedVersion >= 32) {
// SCTP is supported from Chrome M31.
// No need to pass DTLS constraint as it is on by default in Chrome M31.
// For SCTP, reliable and ordered is true by default.
} else {
// Chrome < M32 does not yet do DTLS-SRTP by default whereas Firefox only
// does DTLS-SRTP. In order to get interop, you must supply Chrome
// with a PC constructor constraint to enable DTLS.
console.warn("Turning on SCTP combatibility - please update your Chrome.");
optionalPcConstraints.push({
DtlsSrtpKeyAgreement: true
});
}
}
//console.log("WebRTC settings", mediaStream.webrtc.settings);
};
$scope.refreshWebrtcSettings(); // Call once for bootstrap.
var pickupTimeout = null;
var autoAcceptTimeout = null;
$scope.updateAutoAccept = function(id, from) {
if (id) {
console.log("Auto accept requested", id);
$scope.autoAccept = id;
$timeout.cancel(autoAcceptTimeout);
autoAcceptTimeout = $timeout(function() {
$scope.autoAccept = null;
console.warn("Auto accept expired!")
safeApply($scope);
}, 2000);
} else {
if ($scope.autoAccept && $scope.autoAccept === from) {
$scope.autoAccept = null;
$timeout.cancel(autoAcceptTimeout);
console.log("Auto accept success", from)
return from;
}
return null;
}
};
$scope.manualReloadApp = function(url) {
manualUnload = true;
if (url) {
$window.location.href = url;
$timeout(function() {
manualUnload = false;
}, 0);
} else {
$window.location.reload(true);
}
};
$scope.loadUserSettings = function() {
$scope.master = angular.copy($scope.defaults);
var storedUser = userSettingsData.load();
if (storedUser) {
$scope.user = $.extend(true, {}, $scope.master, storedUser);
$scope.user.settings = $.extend(true, {}, $scope.user.settings, $scope.master.settings, $scope.user.settings);
$scope.update($scope.user);
$scope.loadedUser = storedUser.displayName && true;
} else {
$scope.loadedUser = false;
}
$scope.reset();
};
$scope.toggleBuddylist = (function() {
var oldState = null;
return function(status, force) {
if (status || force) {
oldState = $scope.layout.buddylist;
$scope.layout.buddylist = !! status;
} else {
$scope.layout.buddylist = oldState;
}
}
}());
$scope.openContactsManager = (function() {
var oldDialog = null;
return function() {
if (oldDialog) {
oldDialog.dismiss("open");
}
oldDialog = dialogs.create(
"/contactsmanager/main.html",
"ContactsmanagerController",
{
header: translation._("Contacts Manager")
}, {
wc: "contactsmanager"
}
);
oldDialog.result.finally(function() {
oldDialog = null;
});
return oldDialog
}
}());
$scope.$watch("cameraMute", function(cameraMute) {
mediaStream.webrtc.setVideoMute(cameraMute);
});
$scope.$watch("microphoneMute", function(cameraMute) {
mediaStream.webrtc.setAudioMute(cameraMute);
});
var ringer = playSound.interval("ring", null, 4000);
var dialer = playSound.interval("dial", null, 4000);
var dialerEnabled = false;
var notification;
var ttlTimeout;
var reloadDialog = false;
mediaStream.api.e.on("received.self", function(event, data) {
$timeout.cancel(ttlTimeout);
safeApply($scope, function(scope) {
scope.id = scope.myid = data.Id;
scope.userid = scope.myuserid = data.Userid ? data.Userid : null;
scope.suserid = data.Suserid ? data.Suserid : null;
scope.turn = data.Turn;
scope.stun = data.Stun;
scope.refreshWebrtcSettings();
});
if (data.Version !== mediaStream.version) {
console.info("Server was upgraded. Reload required.");
if (!reloadDialog) {
reloadDialog = true;
_.delay(function() {
alertify.dialog.confirm(translation._("Restart required to apply updates. Click ok to restart now."), function() {
$scope.manualReloadApp();
}, function() {
reloadDialog = false;
});
}, 300);
}
}
// Support authentication from localStorage.
if (!data.Userid && mediaStream.config.UsersEnabled) {
// Check if we can load a user.
var login = mediaStream.users.load();
if (login !== null) {
$scope.loadedUserlogin = true;
console.log("Trying to authorize with stored credentials ...");
mediaStream.users.authorize(login, function(data) {
console.info("Retrieved nonce - authenticating as user:", data.userid);
mediaStream.api.requestAuthentication(data.userid, data.nonce);
delete data.nonce;
}, function(data, status) {
console.error("Failed to authorize session", status, data);
mediaStream.users.forget();
});
} else {
$scope.loadedUserlogin = false;
}
}
// Support to upgrade stuff when ttl was reached.
if (data.Turn.ttl) {
ttlTimeout = $timeout(function() {
console.log("Ttl reached - sending refresh request.");
mediaStream.api.sendSelf();
}, data.Turn.ttl / 100 * 90 * 1000);
}
// Support resurrection shrine.
if (resurrect) {
var resurrection = resurrect;
resurrect = null;
$timeout(function() {
if (resurrection.id === $scope.id) {
console.log("Using resurrection shrine", resurrection);
// Valid resurrection.
$scope.setStatus(resurrection.status);
}
}, 0);
}
// Propagate authentication event.
appData.e.triggerHandler("selfReceived", [data]);
// Unmark authorization process.
if (data.Userid) {
$rootScope.authorizing(false);
$rootScope.$broadcast("authorization.succeeded");
} else if (!$rootScope.authorizing()) {
// Trigger user data load when not in authorizing phase.
$scope.loadUserSettings();
}
if (rooms.inDefaultRoom() && $scope.master.settings.defaultRoom) {
console.log("Selecting default room from settings:", [$scope.master.settings.defaultRoom]);
rooms.joinByName($scope.master.settings.defaultRoom, true);
}
});
mediaStream.webrtc.e.on("peercall", function(event, peercall) {
// Kill timeout.
$timeout.cancel(pickupTimeout);
pickupTimeout = null;
// Kill ringer.
if (peercall && peercall.from === null) {
dialerEnabled = true;
} else {
dialerEnabled = false;
}
ringer.stop();
// Close notifications.
if (notification) {
notification.close();
}
// Apply peer call to scope.
safeApply($scope, function(scope) {
scope.peer = peercall ? peercall.id : null;
});
});
mediaStream.webrtc.e.on("peerconference", function(event, peerconference) {
safeApply($scope, function(scope) {
scope.conference = peerconference ? peerconference.id : null;
scope.conferencePeers = peerconference ? peerconference.peerIds() : [];
});
});
mediaStream.webrtc.e.on("offer", function(event, from, to2, to) {
safeApply($scope, function(scope) {
scope.incoming = from;
});
if ($scope.updateAutoAccept(null, from)) {
// Auto accept support.
mediaStream.webrtc.doAccept();
return;
}
// Start to ring.
ringer.start();
// Show incoming call notification.
notification = desktopNotify.notify(translation._("Incoming call"), translation._("from") + " " + displayName(from), {
timeout: null
});
$scope.$emit("status", "ringing");
// Start accept timeout.
pickupTimeout = $timeout(function() {
console.log("Pickup timeout reached.");
mediaStream.webrtc.doHangup("pickuptimeout");
$scope.$emit("notification", "incomingpickuptimeout", {
reason: 'pickuptimeout',
from: from
});
}, 30000);
appData.e.triggerHandler("uiNotification", ["incoming", {from: from}]);
});
mediaStream.webrtc.e.on("error", function(event, message, msgid) {
switch (msgid) {
case "failed_getusermedia":
message = translation._("Failed to access camera/microphone.");
break;
case "failed_peerconnection_setup":
case "failed_peerconnection":
message = translation._("Failed to establish peer connection.")
break;
}
if (!message) {
message = msgid;
}
if (!message) {
message = translation._("We are sorry but something went wrong. Boo boo.");
}
alertify.dialog.alert(translation._("Oops") + "<br/>" + message);
});
var reconnect = function() {
if (connected && autoreconnect) {
if (resurrect === null) {
// Storage data at the resurrection shrine.
resurrect = {
status: $scope.getStatus(),
id: $scope.id
}
console.log("Stored data at the resurrection shrine", resurrect);
}
reconnecting = false;
_.delay(function() {
if (autoreconnect && !reconnecting) {
reconnecting = true;
console.log("Requesting to reconnect ...");
mediaStream.reconnect();
}
}, 500);
$scope.setStatus("reconnecting");
} else {
$scope.setStatus("closed");
}
};
$scope.$on("room.joined", function(ev) {
// TODO(lcooper): Is it really needful to do this stuff?
$timeout.cancel(ttlTimeout);
connected = true;
reconnecting = false;
$scope.updateStatus(true);
});
mediaStream.connector.e.on("open error close", function(event) {
$timeout.cancel(ttlTimeout);
$scope.userid = $scope.suserid = null;
switch (event.type) {
case "open":
connected = true;
reconnecting = false;
$scope.updateStatus(true);
$scope.setStatus("waiting");
break;
case "error":
if (reconnecting || connected) {
reconnecting = false;
reconnect();
} else {
$scope.setStatus(event.type);
}
break;
case "close":
reconnect();
break;
}
});
mediaStream.webrtc.e.on("waitforusermedia connecting", function(event, currentcall) {
var t = event.type;
safeApply($scope, function(scope) {
scope.dialing = currentcall ? currentcall.id : null;
scope.setStatus(t);
});
});
mediaStream.webrtc.e.on("statechange", function(event, state, currentcall) {
console.info("P2P state changed", state, currentcall.id);
switch (state) {
case "completed":
case "connected":
if ($scope.conference) {
$scope.setStatus('conference');
} else {
$scope.setStatus('connected');
}
break;
case "failed":
mediaStream.webrtc.doHangup("failed", currentcall.id);
alertify.dialog.alert(translation._("Peer connection failed. Check your settings."));
break;
}
});
$scope.$on("active", function(event, currentcall) {
console.info("Video state active (assuming connected)", currentcall.id);
if ($scope.conference) {
$scope.setStatus('conference');
} else {
$scope.setStatus('connected');
}
$timeout(function() {
if ($scope.peer) {
$scope.layout.buddylist = false;
$scope.layout.buddylistAutoHide = true;
}
}, 1000);
});
$scope.$on("mainview", function(event, mainview, state) {
console.info("Main view update", mainview, state);
var changed = false;
var layout = $scope.layout;
if (layout.main === mainview && !state) {
layout.main = null;
changed = true;
} else if (state) {
layout.main = mainview;
changed = true;
}
if (changed) {
$scope.$broadcast("mainresize", layout.main);
}
});
$scope.$watch("userid", function(userid, olduserid) {
var suserid;
if (userid) {
suserid = $scope.suserid;
console.info("Session is now authenticated:", userid, suserid);
}
if (userid !== olduserid) {
appData.e.triggerHandler("authenticationChanged", [userid, suserid]);
// Load user settings after authentication changed.
$scope.loadUserSettings();
}
});
// Apply all layout stuff as classes to our element.
$scope.$watch("layout", (function() {
var makeName = function(prefix, n) {
return prefix + n.charAt(0).toUpperCase() + n.slice(1);
};
return function(layout, old) {
_.each(layout, function(v, k) {
if (k === "main") {
return;
}
var n = makeName("with", k);
if (v) {
$element.addClass(n);
} else {
$element.removeClass(n);
}
});
if (old.main !== layout.main) {
if (old.main) {
$element.removeClass(makeName("main", old.main));
}
if (layout.main) {
$element.addClass(makeName("main", layout.main));
}
}
$scope.$broadcast("mainresize", layout.main);
}
}()), true);
mediaStream.webrtc.e.on("done", function() {
if (mediaStream.connector.connected) {
$scope.setStatus("waiting");
}
});
mediaStream.webrtc.e.on("busy", function(event, from) {
console.log("Incoming call - sent busy.", from);
$scope.$emit("notification", "incomingbusy", {
reason: 'busy',
from: from
});
});
mediaStream.webrtc.e.on("bye", function(event, reason, from) {
switch (reason) {
case "busy":
console.log("User is busy", reason, from);
$scope.$emit("notification", "busy", {
reason: reason,
from: from
});
break;
case "reject":
console.log("User rejected", reason, from);
$scope.$emit("notification", "reject", {
reason: reason,
from: from
});
break;
case "pickuptimeout":
console.log("User did not pick up", reason, from);
$scope.$emit("notification", "pickuptimeout", {
reason: reason,
from: from
});
break;
case "error":
console.log("User cannot accept call because of error");
alertify.dialog.alert(translation._("Oops") + "<br/>" + translation._("User hung up because of error."));
break;
}
});
$scope.$on("status", function(event, status) {
if (status === "connecting" && dialerEnabled) {
dialer.start();
} else {
dialer.stop();
}
safeApply($scope, function(scope) {
var old = $scope.status;
$scope.status = status;
if (old === "connected" && status === "waiting") {
_.delay(playSound.play, 100, "end");
} else if (old === "connecting" && status === "connected") {
playSound.play("connect");
}
});
appData.e.triggerHandler("mainStatus", [status]);
});
$scope.$on("notification", function(event, type, details) {
var message = null;
switch (type) {
case "busy":
message = displayName(details.from) + translation._(" is busy. Try again later.");
break;
case "reject":
message = displayName(details.from) + translation._(" rejected your call.");
break;
case "pickuptimeout":
message = displayName(details.from) + translation._(" does not pick up.");
break;
case "incomingbusy":
toastr.info(moment().format("llll"), displayName(details.from) + translation._(" tried to call you."));
break;
case "incomingpickuptimeout":
toastr.info(moment().format("llll"), displayName(details.from) + translation._(" called you."));
break;
}
if (message) {
playSound.play("question");
alertify.dialog.alert(message);
}
appData.e.triggerHandler("uiNotification", [type, details]);
});
$scope.$on("download", function(event, from, token) {
var scope = event.targetScope;
fileDownload.startDownload(scope, from, token);
});
var chatMessagesUnseen = {};
$scope.$on("chatincoming", function(event, id) {
var count = chatMessagesUnseen[id] || 0;
count++;
chatMessagesUnseen[id] = count;
$scope.chatMessagesUnseen++;
});
$scope.$on("chatseen", function(event, id) {
var count = chatMessagesUnseen[id] || 0;
delete chatMessagesUnseen[id];
$scope.chatMessagesUnseen = $scope.chatMessagesUnseen - count;
});
_.defer(function() {
if (!Modernizr.websockets) {
alertify.dialog.alert(translation._("Your browser is not supported. Please upgrade to a current version."));
$scope.setStatus("unsupported");
return;
}
if (!$window.webrtcDetectedVersion) {
alertify.dialog.alert(translation._("Your browser does not support WebRTC. No calls possible."));
return;
}
});
}];
});