realtime.dart

  handleMessage(WebSocket webSocket) {
    webSocket.map((string) => JSON.decode(string)).listen((Map map) async {
      if (map["type"] == "client") {
        await connectClient(map["userID"], webSocket);
      } else {
        await handleChatMessage(map, webSocket);
      }
    }, onError: (error, stack) {
      Logger.root.severe(error);
      Logger.root.severe(stack);
    }, onDone: () {
      Logger.root.severe("${clients.inverse.remove(webSocket)} disconnected");
      webSocket.close();
    });
  }