Merge pull request #2006 from nextcloud/backport/2004/stable16

[stable16] Fix peer creation for participants no longer in the call

js/webrtc.js

@@ -228,6 +228,10 @@ var spreedPeerConnectionTable = [];
 			OCA.SpreedMe.videos.remove(sessionId);
 			delete spreedMappingTable[sessionId];
 			delete guestNamesTable[sessionId];
+			if (delayedCreatePeer[sessionId]) {
+				clearTimeout(delayedCreatePeer[sessionId]);
+				delete delayedCreatePeer[sessionId];
+			}
 		});
 
 		previousUsersInRoom = previousUsersInRoom.diff(disconnectedSessionIds);
@@ -349,6 +353,12 @@ var spreedPeerConnectionTable = [];
 				delete delayedCreatePeer[message.from];
 			}
 
+			if (!selfInCall) {
+				console.log('Offer received when not in the call, ignore');
+
+				message.type = 'offer-to-ignore';
+			}
+
 			// MCU screen offers do not include the "broadcaster" property,
 			// which is expected by SimpleWebRTC in screen offers from a remote
 			// peer, so it needs to be explicitly added.