Pass along just the client id instead a reference to the entire client when unregistering the client

controllers/chat.go

@@ -25,7 +25,7 @@ func GetChatMessages(w http.ResponseWriter, r *http.Request) {
 		messages := chat.GetChatHistory()
 
 		if err := json.NewEncoder(w).Encode(messages); err != nil {
-			log.Errorln(err)
+			log.Debugln(err)
 		}
 	default:
 		w.WriteHeader(http.StatusNotImplemented)

core/chat/chatclient.go

@@ -155,7 +155,7 @@ func (c *ChatClient) close() {
 	log.Traceln("client closed:", c.User.DisplayName, c.id, c.ipAddress)
 
 	c.conn.Close()
-	c.server.unregister <- c
+	c.server.unregister <- c.id
 	if c.send != nil {
 		close(c.send)
 		c.send = nil

core/chat/server.go

@@ -32,7 +32,7 @@ type ChatServer struct {
 	inbound chan chatClientEvent
 
 	// unregister requests from clients.
-	unregister chan *ChatClient
+	unregister chan uint // the ChatClient id
 }
 
 func NewChat() *ChatServer {
@@ -40,7 +40,7 @@ func NewChat() *ChatServer {
 		clients:        map[uint]*ChatClient{},
 		outbound:       make(chan []byte),
 		inbound:        make(chan chatClientEvent),
-		unregister:     make(chan *ChatClient),
+		unregister:     make(chan uint),
 		maxClientCount: handleMaxConnectionCount(),
 	}
 
@@ -50,10 +50,10 @@ func NewChat() *ChatServer {
 func (s *ChatServer) Run() {
 	for {
 		select {
-		case client := <-s.unregister:
+		case clientId := <-s.unregister:
-			if _, ok := s.clients[client.id]; ok {
+			if _, ok := s.clients[clientId]; ok {
 				s.mu.Lock()
-				delete(s.clients, client.id)
+				delete(s.clients, clientId)
 				s.mu.Unlock()
 			}