mchess-client/lib/connection/ws_connection.dart

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import 'dart:developer';
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/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;
late Stream broadcast;
static final ServerConnection _instance = ServerConnection._internal();
ServerConnection._internal() {
log("ServerConnection._internal constructor is called");
connect();
}
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() {
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if (wasConnected) channel.sink.close();
channel =
WebSocketChannel.connect(Uri.parse('wss://chess.sw-gross.de:8080'));
log(channel.closeCode.toString());
wasConnected = true;
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broadcast = channel.stream.asBroadcastStream();
broadcast.listen((data) {
log("Data received:");
log(data);
var receivedString = data.toString();
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var splitString = receivedString.split(' ');
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if (splitString[0] == "cl") {
ChessColor onBottom =
splitString[1] == "white" ? ChessColor.white : ChessColor.black;
ChessBloc.getInstance().add(ColorDetermined(myColor: onBottom));
return;
}
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if (splitString[0] == "bd") {
if (splitString[1] == "init") ChessBloc.getInstance().add(InitBoard());
}
if (splitString[0] == ('mv')) {
var startSquare = ChessCoordinate.fromString(splitString[1]);
var endSquare = ChessCoordinate.fromString(splitString[2]);
if (ChessMove(from: startSquare, to: endSquare) ==
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: $startSquare to: $endSquare)}');
log('Move received : ${startSquare.toAlphabetical()}:${endSquare.toAlphabetical()}');
ChessBloc.getInstance().add(OpponentPieceMoved(
startSquare: startSquare, endSquare: endSquare));
}
}
});
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}
}