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/move.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 {
channel =
WebSocketChannel.connect(Uri.parse('wss://chess.sw-gross.de:8080'));
}
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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);
var apiMove = ApiMove.fromJson(jsonDecode(data));
//Todo: Implement status messages
// e.g. to tell the client that both players connected, who is playing which color and so on
var move = ChessMove.fromApiMove(apiMove);
if (move == ChessPosition.getInstance().lastMove) {
//This is our own move that got resent by the server. Do not process.
} else {
log('lastMove: from: ${ChessPosition.getInstance().lastMove?.from} to: ${ChessPosition.getInstance().lastMove?.to}');
log('constructed move: from: ${move.from} to: ${move.to}');
log('Move received : ${move.from.toAlphabetical()}->${move.to.toAlphabetical()}');
ChessBloc.getInstance()
.add(OpponentPieceMoved(startSquare: move.from, endSquare: move.to));
}
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}
}