mchess-client/lib/utils/chess_utils.dart

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import 'package:flutter/material.dart';
import 'package:flutter_svg/svg.dart';
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import 'package:mchess/api/move.dart';
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import 'package:mchess/api/websocket_message.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,
}
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enum ChessColor {
black,
white;
static ChessColor fromApiColor(ApiColor color) {
if (color == ApiColor.black) {
return black;
} else {
return 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',
};
Map<ChessPieceName, String> chessPiecesShortName = {
ChessPieceName.whitePawn: 'P',
ChessPieceName.whiteBishop: 'B',
ChessPieceName.whiteKnight: 'N',
ChessPieceName.whiteRook: 'R',
ChessPieceName.whiteQueen: 'Q',
ChessPieceName.whiteKing: 'K',
ChessPieceName.blackPawn: 'p',
ChessPieceName.blackBishop: 'b',
ChessPieceName.blackKnight: 'n',
ChessPieceName.blackRook: 'r',
ChessPieceName.blackQueen: 'q',
ChessPieceName.blackKing: 'k',
ChessPieceName.none: 'X',
};
class ChessCoordinate {
final int column;
final int row;
ChessCoordinate(this.column, this.row);
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factory ChessCoordinate.fromString(String coordString) {
var column = int.parse(coordString[0]);
var row = int.parse(coordString[1]);
return ChessCoordinate(column, row);
}
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factory ChessCoordinate.fromApiCoordinate(ApiCoordinate apiCoordinate) {
return ChessCoordinate(apiCoordinate.col, apiCoordinate.row);
}
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
String toString() {
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String rowStr = row.toString();
String colStr = column.toString();
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return '$colStr$rowStr';
}
String toAlphabetical() {
Map<int, String> columnMap = {
1: "a",
2: "b",
3: "c",
4: "d",
5: "e",
6: "f",
7: "g",
8: "h"
};
String rowStr = row.toString();
String colStr = columnMap[column]!;
return '$colStr$rowStr';
}
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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 String shortName;
final Widget? pieceImage;
const ChessPiece._(
this.pieceName, this.color, this.pieceImage, this.shortName);
factory ChessPiece(ChessPieceName name, ChessColor color) {
Widget? pieceImage;
String pieceAssetUrl = chessPiecesAssets[name]!;
String shortName = chessPiecesShortName[name]!;
pieceImage = SvgPicture.asset(pieceAssetUrl);
return ChessPiece._(name, color, pieceImage, shortName);
}
const ChessPiece.none({super.key})
: pieceName = ChessPieceName.none,
color = ChessColor.white,
pieceImage = null,
shortName = "-";
@override
Widget build(BuildContext context) {
return SizedBox(
child: pieceImage,
);
}
}
class ChessMove {
ChessCoordinate from;
ChessCoordinate to;
ChessMove({required this.from, required this.to});
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factory ChessMove.fromApiMove(ApiMove apiMove) {
final start = ChessCoordinate.fromApiCoordinate(apiMove.startSquare);
final end = ChessCoordinate.fromApiCoordinate(apiMove.endSquare);
return ChessMove(from: start, to: end);
}
@override
operator ==(other) {
return other is ChessMove && other.from == from && other.to == to;
}
@override
int get hashCode {
return hash2(from, to);
}
}
class PieceMovedFrom {
ChessCoordinate fromSquare;
ChessPiece? movedPiece;
PieceMovedFrom(this.fromSquare, this.movedPiece);
}