115 lines
3.8 KiB
Dart
115 lines
3.8 KiB
Dart
import 'dart:async';
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import 'package:flutter_bloc/flutter_bloc.dart';
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import 'package:mchess/chess_bloc/chess_events.dart';
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import 'package:mchess/chessapp/chess_utils.dart';
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import 'package:mchess/connection/ws_connection.dart';
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class ChessBloc extends Bloc<ChessEvent, ChessBoardState> {
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static final ChessBloc _instance = ChessBloc._internal();
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ChessBloc._internal() : super(ChessBoardState.init()) {
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on<PieceMoved>(moveHandler);
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}
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factory ChessBloc.getInstance() {
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return ChessBloc();
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}
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factory ChessBloc() {
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return _instance;
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}
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FutureOr<void> moveHandler(PieceMoved event, Emitter<ChessBoardState> emit) {
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Map<ChessCoordinate, ChessPiece> newPosition = state.position;
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ServerConnection.getInstance().send(
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'mv ${event.startSquare.toString()} ${event.endSquare.toString()}');
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newPosition[event.endSquare] = state.position[event.startSquare]!;
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newPosition[event.startSquare] = const ChessPiece.none();
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print('emitting new state with position $newPosition');
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emit(ChessBoardState(
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state.flipped,
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ChessColor.black,
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newPosition,
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));
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}
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bool preCheckHandler(
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PreCheckMove event,
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) {
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ServerConnection.getInstance().send(
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'pc ${event.move.startSquare.toString()} ${event.move.endSquare.toString()}');
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print('Pretending to check a move before you drop a piece');
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return true;
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}
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}
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class ChessBoardState {
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final bool flipped;
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final ChessColor turnColor;
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final Map<ChessCoordinate, ChessPiece> position;
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ChessBoardState._(this.flipped, this.turnColor, this.position);
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factory ChessBoardState(
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bool flipped,
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ChessColor turnColor,
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Map<ChessCoordinate, ChessPiece> position,
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) {
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return ChessBoardState._(flipped, turnColor, position);
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}
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factory ChessBoardState.init() {
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bool flipped = false;
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ChessColor turnColor = ChessColor.white;
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Map<ChessCoordinate, ChessPiece> position = {};
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for (int i = 0; i <= 8; i++) {
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position[ChessCoordinate(i, 7)] =
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ChessPiece(ChessPieceName.blackPawn, ChessColor.black);
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position[ChessCoordinate(i, 2)] =
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ChessPiece(ChessPieceName.whitePawn, ChessColor.white);
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}
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position[ChessCoordinate(1, 8)] =
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ChessPiece(ChessPieceName.blackRook, ChessColor.black);
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position[ChessCoordinate(2, 8)] =
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ChessPiece(ChessPieceName.blackKnight, ChessColor.black);
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position[ChessCoordinate(3, 8)] =
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ChessPiece(ChessPieceName.blackBishop, ChessColor.black);
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position[ChessCoordinate(4, 8)] =
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ChessPiece(ChessPieceName.blackQueen, ChessColor.black);
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position[ChessCoordinate(5, 8)] =
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ChessPiece(ChessPieceName.blackKing, ChessColor.black);
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position[ChessCoordinate(6, 8)] =
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ChessPiece(ChessPieceName.blackBishop, ChessColor.black);
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position[ChessCoordinate(7, 8)] =
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ChessPiece(ChessPieceName.blackKnight, ChessColor.black);
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position[ChessCoordinate(8, 8)] =
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ChessPiece(ChessPieceName.blackRook, ChessColor.black);
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position[ChessCoordinate(1, 1)] =
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ChessPiece(ChessPieceName.whiteRook, ChessColor.black);
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position[ChessCoordinate(2, 1)] =
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ChessPiece(ChessPieceName.whiteKnight, ChessColor.black);
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position[ChessCoordinate(3, 1)] =
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ChessPiece(ChessPieceName.whiteBishop, ChessColor.black);
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position[ChessCoordinate(4, 1)] =
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ChessPiece(ChessPieceName.whiteQueen, ChessColor.black);
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position[ChessCoordinate(5, 1)] =
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ChessPiece(ChessPieceName.whiteKing, ChessColor.black);
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position[ChessCoordinate(6, 1)] =
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ChessPiece(ChessPieceName.whiteBishop, ChessColor.black);
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position[ChessCoordinate(7, 1)] =
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ChessPiece(ChessPieceName.whiteKnight, ChessColor.black);
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position[ChessCoordinate(8, 1)] =
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ChessPiece(ChessPieceName.whiteRook, ChessColor.black);
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return ChessBoardState._(flipped, turnColor, position);
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}
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}
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