2 files changed, 13 insertions, 1 deletions
diff --git a/webclient/components/matrix/matrix-call.js b/webclient/components/matrix/matrix-call.js
index 494a37f340..a025ccf632 100644
--- a/webclient/components/matrix/matrix-call.js
+++ b/webclient/components/matrix/matrix-call.js
@@ -42,11 +42,13 @@ window.RTCIceCandidate = window.RTCIceCandidate || window.webkitRTCIceCandidate
 
 // Returns true if the browser supports all required features to make WebRTC call
 var isWebRTCSupported = function () {
-    return (navigator.getUserMedia || window.RTCPeerConnection || window.RTCSessionDescription || window.RTCIceCandidate);
+    return !!(navigator.getUserMedia || window.RTCPeerConnection || window.RTCSessionDescription || window.RTCIceCandidate);
 };
 
 angular.module('MatrixCall', [])
 .factory('MatrixCall', ['matrixService', 'matrixPhoneService', '$rootScope', '$timeout', function MatrixCallFactory(matrixService, matrixPhoneService, $rootScope, $timeout) {
+    $rootScope.isWebRTCSupported = isWebRTCSupported();
+
     var MatrixCall = function(room_id) {
         this.room_id = room_id;
         this.call_id = "c" + new Date().getTime();
diff --git a/webclient/components/matrix/matrix-phone-service.js b/webclient/components/matrix/matrix-phone-service.js
index d05eecf72a..9d0b84fb23 100644
--- a/webclient/components/matrix/matrix-phone-service.js
+++ b/webclient/components/matrix/matrix-phone-service.js
@@ -59,6 +59,16 @@ angular.module('matrixPhoneService', [])
 
             var MatrixCall = $injector.get('MatrixCall');
             var call = new MatrixCall(event.room_id);
+
+            if (!isWebRTCSupported()) {
+                console.log("Incoming call ID "+msg.call_id+" but this browser doesn't support WebRTC");
+                // don't hang up the call: there could be other clients connected that do support WebRTC and declining the
+                // the call on their behalf would be really annoying.
+                // instead, we broadcast a fake call event with a non-functional call object
+                $rootScope.$broadcast(matrixPhoneService.INCOMING_CALL_EVENT, call);
+                return;
+            }
+
             call.call_id = msg.call_id;
             call.initWithInvite(event);
             matrixPhoneService.allCalls[call.call_id] = call;