Fix not joining call again due to call flags in forced reconnections

When the HPB is not used forcing a reconnection causes the call to be
left and then joined again. Although it was waited for the call to be
left first before joining again in some cases it could happen that,
after sending the join request but before receiving its response, the
"usersInRoom" event was received. In that case the call flags for the
participant will be "disconnected" (as at this point it is actually
disconnected), but as the join request was already sent it is seen as "a
moderator ended the call", and thus the call is left again. To prevent
that now it is explicitly waited for the "disconnected" flags to be
received and, then, the call is joined again.

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

src/utils/signaling.js

@@ -360,6 +360,8 @@ function Internal(settings) {
 	this.sendInterval = window.setInterval(function() {
 		this.sendPendingMessages()
 	}.bind(this), 500)
+
+	this._joinCallAgainOnceDisconnected = false
 }
 
 Internal.prototype = new Signaling.Base()
@@ -399,7 +401,7 @@ Signaling.Internal.prototype.forceReconnect = function(newSession, flags) {
 	// FIXME Naive reconnection routine; as the same session is kept peers
 	// must be explicitly ended before the reconnection is forced.
 	this.leaveCall(this.currentCallToken, true).then(() => {
-		this.joinCall(this.currentCallToken, this.currentCallFlags)
+		this._joinCallAgainOnceDisconnected = true
 	})
 }
 
@@ -425,11 +427,14 @@ Signaling.Internal.prototype._sendMessages = function(messages) {
 }
 
 Signaling.Internal.prototype._joinRoomSuccess = function(token, sessionId) {
+	this._joinCallAgainOnceDisconnected = false
+
 	this.sessionId = sessionId
 	this._startPullingMessages()
 }
 
 Signaling.Internal.prototype._doLeaveRoom = function(token) {
+	this._joinCallAgainOnceDisconnected = false
 }
 
 Signaling.Internal.prototype.sendCallMessage = function(data) {
@@ -471,11 +476,20 @@ Signaling.Internal.prototype._startPullingMessages = function() {
 			}
 
 			result.data.ocs.data.forEach(message => {
+				let localParticipant
+
 				this._trigger('onBeforeReceiveMessage', [message])
 				switch (message.type) {
 				case 'usersInRoom':
 					this._trigger('usersInRoom', [message.data])
 					this._trigger('participantListChanged')
+
+					localParticipant = message.data.find(participant => participant.sessionId === this.sessionId)
+					if (this._joinCallAgainOnceDisconnected && !localParticipant.inCall) {
+						this._joinCallAgainOnceDisconnected = false
+						this.joinCall(this.currentCallToken, this.currentCallFlags)
+					}
+
 					break
 				case 'message':
 					if (typeof (message.data) === 'string') {