chlss/dist/boardPosition.js

Open-Source Chess Engine in TypeScript.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.BoardPosition = void 0;
const piece_1 = require("./piece");
const pieces_1 = __importDefault(require("./pieces"));
const coords_1 = require("./coords");
const colour_1 = require("./colour");
exports.BoardPosition = {
    getAllPiecesByColour(boardPosition, colour) {
        return boardPosition.filter(function (p) {
            const pieceColour = piece_1.Piece.getColour(p);
            if (pieceColour == null)
                return false;
            return pieceColour == colour;
        });
    },
    createEmpty() {
        let boardArray = new Array();
        for (let x = 0; x < 64; x++) {
            boardArray.push(pieces_1.default.Empty);
        }
        return boardArray;
    },
    copyAsync(boardPosition) {
        const copy = exports.BoardPosition.createEmpty();
        for (let index = 0; index < 64; index++) {
            const squareIndex = index;
            exports.BoardPosition.setPiece(copy, squareIndex, exports.BoardPosition.getPiece(boardPosition, squareIndex));
        }
        return copy;
    },
    setEmpty(boardPosition, square) {
        boardPosition[square] = pieces_1.default.Empty;
    },
    createDefault() {
        return [pieces_1.default.BlackRook, pieces_1.default.BlackKnight, pieces_1.default.BlackBishop, pieces_1.default.BlackQueen, pieces_1.default.BlackKing, pieces_1.default.BlackBishop, pieces_1.default.BlackKnight, pieces_1.default.BlackRook,
            pieces_1.default.BlackPawn, pieces_1.default.BlackPawn, pieces_1.default.BlackPawn, pieces_1.default.BlackPawn, pieces_1.default.BlackPawn, pieces_1.default.BlackPawn, pieces_1.default.BlackPawn, pieces_1.default.BlackPawn,
            pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty,
            pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty,
            pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty,
            pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty, pieces_1.default.Empty,
            pieces_1.default.WhitePawn, pieces_1.default.WhitePawn, pieces_1.default.WhitePawn, pieces_1.default.WhitePawn, pieces_1.default.WhitePawn, pieces_1.default.WhitePawn, pieces_1.default.WhitePawn, pieces_1.default.WhitePawn,
            pieces_1.default.WhiteRook, pieces_1.default.WhiteKnight, pieces_1.default.WhiteBishop, pieces_1.default.WhiteQueen, pieces_1.default.WhiteKing, pieces_1.default.WhiteBishop, pieces_1.default.WhiteKnight, pieces_1.default.WhiteRook
        ];
    },
    isEmpty(boardPosition, x, y) {
        return this.isSquareEmpty(boardPosition, coords_1.Coords.toSquareIndex(x, y));
    },
    isSquareEmpty(boardPosition, square) {
        return piece_1.Piece.isEmpty(this.getPiece(boardPosition, square));
    },
    isSquaresEmpty(boardPosition, ...squares) {
        for (let index of squares) {
            if (!(this.isSquareEmpty(boardPosition, index)))
                return false;
        }
        return true;
    },
    setPiece(boardPosition, square, piece) {
        boardPosition[square] = piece;
    },
    getPiece(boardPosition, square) {
        return boardPosition[square];
    },
    getPieceByCoords(boardPosition, x, y) {
        return boardPosition[coords_1.Coords.toSquareIndex(x, y)];
    },
    getPieceOrNull(boardPosition, square) {
        const piece = this.getPiece(boardPosition, square);
        return piece == pieces_1.default.Empty ? null : piece;
    },
    isInBoard(x, y) {
        return x >= 0 && x <= 7 && y >= 0 && y <= 7;
    },
    isIndexInBoard(index) {
        return index >= 0 && index <= 63;
    },
    isSquareUnderAttack(squareIndex, moveList) {
        return moveList.filter(function (move) {
            return move.to == squareIndex;
        }).length > 0;
    },
    isSquaresNotUnderAttack(enemyColour, moveList, boardPosition, ...squareIndexes) {
        for (const move of moveList) {
            for (let squareIndex of squareIndexes) {
                if (squareIndex == move.to)
                    return false;
            }
        }
        function isEnemyPawnLookingAt(enemyColour, square) {
            const yDiff = enemyColour == colour_1.Colours.white ? 1 : -1;
            const x1 = coords_1.Coords.toX(square) + 1;
            const x2 = coords_1.Coords.toX(square) - 1;
            const y = coords_1.Coords.toY(square) + yDiff;
            const _x1 = exports.BoardPosition.getPieceByCoords(boardPosition, x1, y);
            const _x2 = exports.BoardPosition.getPieceByCoords(boardPosition, x2, y);
            function isEnemyPawn(piece) {
                return piece_1.Piece.isPawn(piece) && piece_1.Piece.getColour(piece) == enemyColour;
            }
            if (exports.BoardPosition.isInBoard(x1, y)) {
                if (isEnemyPawn(exports.BoardPosition.getPieceByCoords(boardPosition, x1, y)))
                    return true;
            }
            if (exports.BoardPosition.isInBoard(x2, y)) {
                if (isEnemyPawn(exports.BoardPosition.getPieceByCoords(boardPosition, x2, y)))
                    return true;
            }
            return false;
        }
        for (const squareIndex of squareIndexes) {
            if (isEnemyPawnLookingAt(enemyColour, squareIndex))
                return false;
        }
        return true;
    }
};