connect function

Future<void> connect(String token, MethodChannel channel, Function? onMessage)

Implementation

@pragma('vm:entry-point')
Future<void> connect(
    String token, MethodChannel channel, Function? onMessage) async {
  if (!connected) {
    await channel.invokeMethod<dynamic>("unlock");
    return;
  }
  if (active) return;
  await addLog(channel, "Connecting");
  active = true;
  try {
    await subs?.cancel();
    webChannel?.sink.close();
    webChannel = WebSocketChannel.connect(
      Uri.parse('wss://sub.pushed.ru/v2/open-websocket/$token'),
    );
    await webChannel?.ready;
    await setNewStatus(channel, ServiceStatus.active);
    subs = webChannel?.stream.listen((event) async {
      await channel.invokeMethod<dynamic>("lock");
      var message = utf8.decode(event);
      await addLog(channel, "Pushed message: $message");
      if (message != "ONLINE") {
        var payload = json.decode(message);
        var messageId = payload["messageId"];
        var traceId = payload["mfTraceId"];
        var lastMessageId =
            await channel.invokeMethod<String>("getLastMessageId");
        if (lastMessageId != messageId) {
          await addLog(channel, "Pushed processing message");
          await channel.invokeMethod<dynamic>(
              "setLastMessageId", {"lastMessageId": messageId});
          var response = json.encode(<String, dynamic>{
            "messageId": messageId,
            if (traceId != null) "mfTraceId": traceId
          });
          webChannel?.sink.add(utf8.encode(response));
          try {
            var data = json.decode(payload["data"]);
            payload["data"] = data;
          } catch (_) {}
          Map<String, dynamic> data = {"type": "message", "message": payload};
          var res = await channel.invokeMethod<dynamic>("data", data) ?? false;
          if (!res && onMessage != null) await onMessage(payload);
        }
      }
      await Future.delayed(const Duration(seconds: 5));
      await channel.invokeMethod<dynamic>("unlock");
    }, onDone: () async {
      await channel.invokeMethod<dynamic>("lock");
      await addLog(channel, "Closed");
      active = false;
      await setNewStatus(channel, ServiceStatus.disconnected);
      await Future.delayed(const Duration(seconds: 1));
      connect(token, channel, onMessage);
    });
  } catch (e) {
    await channel.invokeMethod<dynamic>("lock");
    await addLog(channel, "Error: $e");
    await setNewStatus(channel, ServiceStatus.disconnected);
    await subs?.cancel();
    active = false;
    await Future.delayed(const Duration(seconds: 1));
    connect(token, channel, onMessage);
  }
}