mchess-client/lib/chessapp/chess_utils.dart

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import 'package:flutter/material.dart';
import 'package:flutter_svg/svg.dart';
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import 'package:quiver/core.dart';
enum ChessPieceName {
none,
whitePawn,
whiteBishop,
whiteKnight,
whiteRook,
whiteQueen,
whiteKing,
blackPawn,
blackBishop,
blackKnight,
blackRook,
blackQueen,
blackKing,
}
enum ChessColor { black, white }
Map<ChessPieceName, String> chessPiecesAssets = {
ChessPieceName.whitePawn: 'assets/pieces/white/pawn.svg',
ChessPieceName.whiteBishop: 'assets/pieces/white/bishop.svg',
ChessPieceName.whiteKnight: 'assets/pieces/white/knight.svg',
ChessPieceName.whiteRook: 'assets/pieces/white/rook.svg',
ChessPieceName.whiteQueen: 'assets/pieces/white/queen.svg',
ChessPieceName.whiteKing: 'assets/pieces/white/king.svg',
ChessPieceName.blackPawn: 'assets/pieces/black/pawn.svg',
ChessPieceName.blackBishop: 'assets/pieces/black/bishop.svg',
ChessPieceName.blackKnight: 'assets/pieces/black/knight.svg',
ChessPieceName.blackRook: 'assets/pieces/black/rook.svg',
ChessPieceName.blackQueen: 'assets/pieces/black/queen.svg',
ChessPieceName.blackKing: 'assets/pieces/black/king.svg',
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ChessPieceName.none: 'assets/empty.svg',
};
class ChessCoordinate {
late int column;
late int row;
ChessCoordinate(this.column, this.row);
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ChessCoordinate.copyFrom(ChessCoordinate original)
: column = original.column,
row = original.row;
static String columnIntToColumnString(int col) {
String colStr;
colStr = String.fromCharCode(col + 96);
return colStr;
}
static int columnStringToColumnInt(String col) {
int colInt;
colInt = col.codeUnitAt(0) - 96;
return colInt;
}
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@override
operator ==(other) {
return other is ChessCoordinate &&
other.column == column &&
other.row == row;
}
@override
int get hashCode {
return hash2(column, row);
}
}
class ChessPiece extends StatelessWidget {
final ChessColor color;
final ChessPieceName pieceName;
final Widget? pieceImage;
const ChessPiece._(this.pieceName, this.color, this.pieceImage);
factory ChessPiece(ChessPieceName name, ChessColor color) {
Widget? pieceImage;
String pieceAssetUrl = chessPiecesAssets[name]!;
pieceImage = SvgPicture.asset(pieceAssetUrl);
return ChessPiece._(name, color, pieceImage);
}
const ChessPiece.none({super.key})
: pieceName = ChessPieceName.none,
color = ChessColor.white,
pieceImage = null;
@override
Widget build(BuildContext context) {
return SizedBox(
child: pieceImage,
);
}
}
class ChessMove {
ChessCoordinate startSquare;
ChessCoordinate endSquare;
ChessPiece? movedPiece;
ChessPiece? pieceOnEndSquare;
ChessMove(this.startSquare, this.endSquare, this.movedPiece);
}