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refactor: remove some empty lines

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This commit is contained in:
Cozma Rares
2023-05-31 09:19:09 +03:00
parent fb71ab2fec
commit 5e8b88bee6
1 changed files with 12 additions and 59 deletions
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server/src/chess/engine.ts
+12 -59
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@@ -20,7 +20,6 @@ export const PIECE_PROMOTION = Object.freeze([
PIECE.ROOK,
PIECE.QUEEN,
] as const);
export type PiecePromotionType = (typeof PIECE_PROMOTION)[number];
export type PieceType = (typeof PIECE)[keyof typeof PIECE];
@@ -28,7 +27,6 @@ export const COLOR = Object.freeze({
WHITE: "w",
BLACK: "b",
} as const);
export type Color = (typeof COLOR)[keyof typeof COLOR];
export type Piece = {
@@ -67,7 +65,6 @@ export const MOVE_FLAGS = Object.freeze({
PROMOTION: 0b0100000,
EN_PASSANT: 0b1000000,
} as const);
export type MoveFlag = (typeof MOVE_FLAGS)[keyof typeof MOVE_FLAGS];
export type Move = {
@@ -131,7 +128,6 @@ export function isDigit(c: string): boolean {
export function squareIndex(square: string | number): number {
if (typeof square === "number") return square;
if (square.length != 2) return -1;
const file = square[0];
@@ -141,7 +137,6 @@ export function squareIndex(square: string | number): number {
const fileNum = file.charCodeAt(0) - "a".charCodeAt(0);
const rankNum = "8".charCodeAt(0) - rank.charCodeAt(0);
return rankNum * 8 + fileNum;
}
@@ -203,7 +198,6 @@ export function validateFEN(fen: string): void {
numSquares += parseInt(symbol);
previousWasNumber = true;
return;
}
@@ -405,7 +399,6 @@ export function generatePieceMoves(
return generatePawnMoves(board, position, piece.color);
const type = piece.type; // hacked the type system
const generateOnce = () => {
const moves: Move[] = [];
@@ -482,6 +475,8 @@ export function generatePieceMoves(
export function squareColor(square: Square | number): Color {
square = squareIndex(square);
if (square == -1) throw new Error("invalid square");
const r = rank(square);
const f = file(square);
@@ -522,12 +517,10 @@ export default class Chess {
for (let i = 0; i < this._board.length; i++) {
const { piece, moves } = this._getMovesForSquare(i);
this._moves = this._moves.concat(this._processMoves(piece, moves));
if (piece != null) {
const pieceColor = piece.color;
moves.forEach(
({ to }) =>
(this._attacks[squareIndex(to)] |= COLOR_MASKS[pieceColor])
@@ -540,11 +533,8 @@ export default class Chess {
validateFEN(fen);
const builder = new Chess.Builder();
const fields = fen.split(" ");
const position = fields[0];
let square = 0;
for (let i = 0; i < position.length; i++) {
@@ -559,7 +549,6 @@ export default class Chess {
color: position[i] < "a" ? COLOR.WHITE : COLOR.BLACK,
type: position[i].toLowerCase() as PieceType,
};
builder.addPiece(square++, piece);
}
@@ -568,13 +557,11 @@ export default class Chess {
builder.setEnPassant(fields[3] as Square);
builder.setHalfMoves(fields[4]);
builder.setFullMoves(fields[5]);
return builder.build();
}
reset() {
const chess = Chess.load();
this._board = chess._board;
this._turn = chess._turn;
this._castling = chess._castling;
@@ -585,15 +572,12 @@ export default class Chess {
getFEN() {
let position = "";
let emptySquares = 0;
for (let i = 0; i < 64; i++) {
if (i % 8 == 0) {
if (emptySquares) position += `${emptySquares}`;
position += "/";
emptySquares = 0;
}
@@ -610,7 +594,6 @@ export default class Chess {
piece.color == COLOR.WHITE
? piece.type.toUpperCase()
: piece.type.toLowerCase();
emptySquares = 0;
}
@@ -622,7 +605,6 @@ export default class Chess {
if (this._castling.w & MOVE_FLAGS.Q_CASTLE) castling += "Q";
if (this._castling.b & MOVE_FLAGS.K_CASTLE) castling += "k";
if (this._castling.b & MOVE_FLAGS.Q_CASTLE) castling += "q";
if (castling == "") castling = "-";
return [
@@ -637,7 +619,6 @@ export default class Chess {
getPiece(square: Square | number) {
square = squareIndex(square);
return square < 0 || square > 63 ? null : this._board[square];
}
@@ -658,12 +639,10 @@ export default class Chess {
piece.color == COLOR.BLACK
? piece.type.toLowerCase()
: piece.type.toUpperCase();
str += ` ${pieceLetter}`;
}
str += "\n A B C D E F G H";
return str;
}
@@ -675,16 +654,13 @@ export default class Chess {
const piece = this.getPiece(square);
const moves =
piece == null ? [] : generatePieceMoves(this._board, square, piece);
return { piece, moves };
}
// TODO: consider checks
private _processMoves(piece: Piece | null, moves: Move[]) {
if (piece?.type != PIECE.KING) return moves;
const other_color = COLOR_MASKS[swapColor(piece.color)];
return moves.filter(
({ to }) => (this._attacks[squareIndex(to)] & other_color) == 0,
this
@@ -693,11 +669,8 @@ export default class Chess {
getMovesForSquare(square: Square | number): Move[] {
square = squareIndex(square);
if (square < 0 || square > 63) return [];
const { piece, moves } = this._getMovesForSquare(square);
return this._processMoves(piece, moves);
}
@@ -705,7 +678,6 @@ export default class Chess {
isSquareAttacked(square: Square | number, color: Color) {
square = squareIndex(square);
return square < 0 || square > 63
? false
: (this._attacks[square] & COLOR_MASKS[color]) != 0;
@@ -736,47 +708,30 @@ export default class Chess {
this._board.forEach((piece) => {
if (piece == null) return;
remainingPieces[piece.type][piece.color]++;
});
if (
remainingPieces[PIECE.PAWN][COLOR.WHITE] > 0 ||
remainingPieces[PIECE.PAWN][COLOR.BLACK] > 0
)
return false;
if (
remainingPieces[PIECE.PAWN][COLOR.BLACK] > 0 ||
remainingPieces[PIECE.QUEEN][COLOR.WHITE] > 0 ||
remainingPieces[PIECE.QUEEN][COLOR.BLACK] > 0
)
return false;
if (
remainingPieces[PIECE.QUEEN][COLOR.BLACK] > 0 ||
remainingPieces[PIECE.ROOK][COLOR.WHITE] > 0 ||
remainingPieces[PIECE.ROOK][COLOR.BLACK] > 0
)
return false;
if (
remainingPieces[PIECE.ROOK][COLOR.BLACK] > 0 ||
remainingPieces[PIECE.BISHOP][COLOR.WHITE] == 2 ||
remainingPieces[PIECE.BISHOP][COLOR.BLACK] == 2
)
return false;
if (
remainingPieces[PIECE.BISHOP][COLOR.BLACK] == 2 ||
remainingPieces[PIECE.BISHOP][COLOR.WHITE] +
remainingPieces[PIECE.BISHOP][COLOR.BLACK] +
remainingPieces[PIECE.KNIGHT][COLOR.WHITE] +
remainingPieces[PIECE.KNIGHT][COLOR.BLACK] >=
3
3
)
return false;
return true;
}
// TODO
// TODO: implement
isThreefoldRepetition() {
return false;
}
@@ -794,17 +749,17 @@ export default class Chess {
return this.isCheckMate() || this.isDraw();
}
// TODO
// TODO: implement
private _addToHistory() {}
// TODO
// TODO: implement
// and a way to track how many moves were undo'ed
undo() {}
// TODO
// TODO: implement
turn() {}
// TODO
// TODO: implement
history() {}
static Builder = class {
@@ -826,9 +781,7 @@ export default class Chess {
addPiece(square: Square | number, piece: Piece) {
if (typeof square != "number") square = squareIndex(square);
if (square < 0 || square > 63) return;
this._board[square] = piece;
}