fix closing already closed channel error

chatManager.go

@@ -524,11 +524,15 @@ func (cm *ChatsManager) createPeerConnection(target string, from string, chatId
 				})
 				dc.OnClose(func() {
 					fmt.Println("closing gracefully event dc...")
+					if _, closed := <-reqChan; !closed {
 						close(reqChan)
+					}
 				})
 				dc.OnError(func(err error) {
 					// logger.Println("--------------- error in dc:", err)
+					if _, closed := <-reqChan; !closed {
 						close(reqChan)
+					}
 				})
 				dc.OnMessage(func(msg webrtc.DataChannelMessage) {
 					var req ChatRequest

squadGrpcMiddleware.go

@@ -104,7 +104,11 @@ func (zm *SquadGrpcMiddleware) Process(ctx context.Context, req *SignalingMessag
 			reqChan := make(chan *SquadRequest)
 			d, e := zm.Manager.Squads[payload["squadId"]].SquadRequestScheduler.Schedule(reqChan)
 			go func() {
-				defer close(reqChan)
+				defer func() {
+					if _, closed := <-reqChan; !closed {
+						close(reqChan)
+					}
+				}()
 				reqChan <- &SquadRequest{
 					ReqType: string(REMOVED_SQUAD_AUTHORIZED_MEMBER),
 					From:    payload["userId"],
@@ -131,7 +135,11 @@ func (zm *SquadGrpcMiddleware) Process(ctx context.Context, req *SignalingMessag
 			reqChan := make(chan *SquadRequest)
 			d, e := zm.Manager.Squads[payload["squadId"]].SquadRequestScheduler.Schedule(reqChan)
 			go func() {
-				defer close(reqChan)
+				defer func() {
+					if _, closed := <-reqChan; !closed {
+						close(reqChan)
+					}
+				}()
 				reqChan <- &SquadRequest{
 					ReqType: string(NEW_AUTHORIZED_SQUAD_MEMBER),
 					From:    payload["userId"],

squadManager.go

@@ -442,11 +442,15 @@ func (zm *SquadManager) createPeerConnection(target string, from string, squadId
 			}
 		})
 		channel.OnClose(func() {
+			if _, closed := <-reqChan; !closed {
 				close(reqChan)
+			}
 			//_ = zm.HandleLeavingMember(target, squadId, true)
 		})
 		channel.OnError(func(err error) {
+			if _, closed := <-reqChan; !closed {
 				close(reqChan)
+			}
 			//_ = zm.HandleLeavingMember(target, squadId, true)
 		})
 		channel.OnMessage(func(msg webrtc.DataChannelMessage) {

zoneGrpcMiddleware.go

@@ -104,7 +104,11 @@ func (zm *ZoneGrpcMiddleware) Process(ctx context.Context, req *SignalingMessage
 			}
 			done, e := zm.Manager.Zones[payload["zoneId"]].ZoneRequestScheduler.Schedule(reqChan)
 			go func() {
-				defer close(reqChan)
+				defer func() {
+					if _, closed := <-reqChan; !closed {
+						close(reqChan)
+					}
+				}()
 				reqChan <- &ZoneRequest{
 					ReqType: string(REMOVED_ZONE_AUTHORIZED_MEMBER),
 					From:    payload["userId"],
@@ -138,7 +142,11 @@ func (zm *ZoneGrpcMiddleware) Process(ctx context.Context, req *SignalingMessage
 			reqChan := make(chan *ZoneRequest)
 			done, e := zm.Manager.Zones[payload["zoneId"]].ZoneRequestScheduler.Schedule(reqChan)
 			go func() {
-				defer close(reqChan)
+				defer func() {
+					if _, closed := <-reqChan; !closed {
+						close(reqChan)
+					}
+				}()
 				// reqChan <- &ZoneRequest{
 				// 	ReqType: string(ADD_USER),
 				// 	From:    payload["userId"],

zoneManager.go

@@ -458,11 +458,15 @@ func (zm *ZoneManager) createPeerConnection(target string, from string, zoneId s
 			}
 		})
 		channel.OnClose(func() {
+			if _, closed := <-reqChan; !closed {
 				close(reqChan)
+			}
 			//_ = zm.HandleLeavingMember(target, zoneId, true)
 		})
 		channel.OnError(func(err error) {
+			if _, closed := <-reqChan; !closed {
 				close(reqChan)
+			}
 			//_ = zm.HandleLeavingMember(target, zoneId, true)
 		})
 		channel.OnMessage(func(msg webrtc.DataChannelMessage) {