mchess-client/lib/chess_bloc/chess_bloc.dart

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import 'dart:convert';
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import 'package:flutter_bloc/flutter_bloc.dart';
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import 'package:mchess/api/move.dart';
import 'package:mchess/api/websocket_message.dart';
import 'package:mchess/chess_bloc/chess_events.dart';
import 'package:mchess/chess_bloc/chess_position.dart';
import 'package:mchess/connection/ws_connection.dart';
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import 'package:mchess/utils/chess_utils.dart';
import 'dart:developer';
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class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
static final ChessBloc _instance = ChessBloc._internal();
static ChessColor turnColor = ChessColor.white;
static ChessColor? myColor;
static ChessColor? getSidesColor() {
return myColor;
}
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ChessBloc._internal() : super(ChessBoardState.init()) {
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on<InitBoard>(initBoard);
on<ColorDetermined>(flipBoard);
on<OpponentPieceMoved>(opponentMoveHandler);
on<OwnPieceMoved>(ownMoveHandler);
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}
factory ChessBloc.getInstance() {
return ChessBloc();
}
factory ChessBloc() {
return _instance;
}
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void initBoard(InitBoard event, Emitter<ChessBoardState> emit) {
ChessPosition.getInstance().resetToStartingPosition();
emit(ChessBoardState(ChessColor.white, ChessColor.white,
ChessPosition.getInstance().currentPosition));
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}
void flipBoard(ColorDetermined event, Emitter<ChessBoardState> emit) {
log("My Color is $myColor");
myColor = event.myColor;
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emit(ChessBoardState(event.myColor, state.newTurnColor, state.position));
}
void opponentMoveHandler(
OpponentPieceMoved event, Emitter<ChessBoardState> emit) {
log('opponentMoveHandler()');
ChessPosition.getInstance().recordMove(event.startSquare, event.endSquare);
var newPosition = ChessPosition.getInstance().currentPosition;
turnColor = state.newTurnColor == ChessColor.white
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? ChessColor.black
: ChessColor.white;
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emit(
ChessBoardState(
state.bottomColor,
turnColor,
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newPosition,
),
);
}
void ownMoveHandler(OwnPieceMoved event, Emitter<ChessBoardState> emit) {
log('ownMoveHandler()');
ChessPosition.getInstance().recordMove(event.startSquare, event.endSquare);
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var start = ApiCoordinate(
col: event.startSquare.column, row: event.startSquare.row);
var end =
ApiCoordinate(col: event.endSquare.column, row: event.endSquare.row);
var move = ApiMove(startSquare: start, endSquare: end);
var message =
ApiWebsocketMessage(type: MessageType.move, move: move, color: null);
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ServerConnection.getInstance().send(jsonEncode(message));
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turnColor = state.newTurnColor == ChessColor.white
? ChessColor.black
: ChessColor.white;
var newPosition = ChessPosition.getInstance().currentPosition;
emit(
ChessBoardState(
state.bottomColor,
turnColor,
newPosition,
),
);
}
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}
class ChessBoardState {
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late ChessColor bottomColor;
final ChessColor newTurnColor;
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final Map<ChessCoordinate, ChessPiece> position;
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ChessBoardState._(this.bottomColor, this.newTurnColor, this.position);
factory ChessBoardState(
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ChessColor bottomColor,
ChessColor turnColor,
Map<ChessCoordinate, ChessPiece> position,
) {
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return ChessBoardState._(bottomColor, turnColor, position);
}
factory ChessBoardState.init() {
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ChessColor bottomColor = ChessColor.white;
ChessColor turnColor = ChessColor.white;
ChessPosition.getInstance().resetToStartingPosition();
return ChessBoardState(
bottomColor, turnColor, ChessPosition.getInstance().currentPosition);
}
void logPosition(Map<ChessCoordinate, ChessPiece> pos) {
// for (int i = 0; i < 7; i++)
}
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}