mchess-client/lib/connection/ws_connection.dart

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import 'dart:convert';
import 'dart:developer';
import 'package:flutter/foundation.dart';
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import 'package:mchess/api/websocket_message.dart';
import 'package:mchess/chess_bloc/chess_bloc.dart';
import 'package:mchess/chess_bloc/chess_events.dart';
import 'package:mchess/chess_bloc/chess_position.dart';
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import 'package:mchess/api/register.dart';
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import 'package:mchess/utils/chess_utils.dart';
import 'package:web_socket_channel/web_socket_channel.dart';
class ServerConnection {
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late WebSocketChannel channel;
late bool wasConnected = false;
late int counter = 0;
Stream broadcast = const Stream.empty();
static final ServerConnection _instance = ServerConnection._internal();
ServerConnection._internal() {
log("ServerConnection._internal constructor is called");
}
factory ServerConnection() {
return _instance;
}
factory ServerConnection.getInstance() {
return ServerConnection();
}
void send(String message) {
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channel.sink.add(message);
counter++;
}
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void connect(String playerID, lobbyID) {
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if (wasConnected) channel.sink.close();
if (kDebugMode) {
channel =
WebSocketChannel.connect(Uri.parse('ws://localhost:8080/api/ws'));
} else {
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channel = WebSocketChannel.connect(
Uri.parse('wss://chess.sw-gross.de:9999/api/ws'));
}
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send(jsonEncode(WebsocketMessageIdentifyPlayer(
playerID: (playerID), lobbyID: (lobbyID))));
log(channel.closeCode.toString());
wasConnected = true;
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broadcast = channel.stream.asBroadcastStream();
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broadcast.listen(handleIncomingData);
}
void handleIncomingData(dynamic data) {
log("Data received:");
log(data);
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var apiMessage = ApiWebsocketMessage.fromJson(jsonDecode(data));
switch (apiMessage.type) {
case MessageType.colorDetermined:
handleIncomingColorDeterminedMessage(apiMessage);
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break;
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case MessageType.move:
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handleIncomingMoveMessage(apiMessage);
break;
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}
}
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void handleIncomingColorDeterminedMessage(ApiWebsocketMessage apiMessage) {
ChessBloc.getInstance().add(
ColorDetermined(myColor: ChessColor.fromApiColor(apiMessage.color!)));
}
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void handleIncomingMoveMessage(ApiWebsocketMessage apiMessage) {
var move = ChessMove.fromApiMove(apiMessage.move!);
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if (move == ChessPosition.getInstance().lastMove) {
//This is our own move that got resent by the server. Do not process.
} else {
ChessBloc.getInstance()
.add(OpponentPieceMoved(startSquare: move.from, endSquare: move.to));
}
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}
}