xchess/lib/game.js

Chess Engine

export {Game}

import {GameContext} from './game-context.js'
import {BoardView} from './board-view.js'
import {PieceSet} from './piece-set.js'
import {GameLog} from './log.js'
import {MetaMap} from './meta-map.js'
import {Emitter} from './emitter.js'
import {INVALID_GAME_VALUE} from './errors.js'
import {IS_EMPTY, IS_STRING, IS_OBJECT} from './types.js'

class Game extends Emitter {

	static is(game){
		try {
			return Boolean(game.#context);
		} catch {
			return false;
		}
	}

	static from(game){
		if(IS_EMPTY(game))
			return new this();
		if(IS_STRING(game))
			return new this(game);
		if(Game.is(game))
			return game;
		if(IS_OBJECT(game))
			return new this(game);
		throw INVALID_GAME_VALUE(game);
	}

	static setup(config){
		const game = this.from(config);
		game.board.setup();
		return game;
	}

	static play(config){
		const game = this.from(config);
		game.play();
		return game;
	}

	static setupAndPlay(config){
		const game = this.from(config);
		game.board.setup();
		game.play();
		return game;
	}

	#context;
	#board;
	#log;
	#meta = new MetaMap();

	constructor(config){
		super();
		this.#context = new GameContext(this);
		this.#board = new BoardView(this.#context);
		this.#log = new GameLog(this.#context);
		this.#context.setAll(config);
	}

	get fen(){
		return this.#context.fen;
	}

	get board(){
		return this.#board;
	}

	get captureList(){
		return new PieceSet(this.#context.captureList);
	}

	get log(){
		return this.#log;
	}

	get meta(){
		return this.#meta;
	}

	get stateCounter(){
		return new Map(this.#context.stateCounter);
	}

	get current(){
		return this.#context.current;
	}

	get time(){
		return this.#context.time;
	}

	get count(){
		return this.#context.count;
	}

	get fullmoveNumber(){
		return this.#context.fullmoveNumber;
	}

	get halfmoveClock(){
		return this.#context.halfmoveClock;
	}

	get color(){
		return this.#context.color;
	}

	get doubleMovePawn(){
		return this.#context.doubleMovePawn;
	}

	get enPassantTarget(){
		return this.#context.enPassantTarget;
	}

	get wk(){
		return this.#context.wk;
	}

	get wq(){
		return this.#context.wq;
	}

	get bk(){
		return this.#context.bk;
	}

	get bq(){
		return this.#context.bq;
	}

	get lastMove(){
		return this.#context.lastMove;
	}

	get moves(){
		return this.#context.moves;
	}

	get isCheck(){
		return this.#context.isCheck;
	}

	get checkKing(){
		return this.#context.checkKing;
	}

	get checkKingTarget(){
		return this.#context.checkKingTarget;
	}

	get stateHash(){
		return this.#context.hash;
	}

	get repetition(){
		return this.#context.repetition;
	}

	get ownRepetition(){
		return this.#context.ownRepetition;
	}

	get newRepetition(){
		return this.#context.newRepetition;
	}

	// Setup

	set fen(fen){
		this.#context.fen = fen;
	}

	set board(board){
		this.#context.board = board;
	}

	set captureList(pieceList){
		this.#context.captureList = pieceList;
	}

	set count(count){
		this.#context.count = count;
	}

	set fullmoveNumber(value){
		this.#context.fullmoveNumber = value;
	}

	set halfmoveClock(value){
		this.#context.halfmoveClock = value;
	}

	set color(color){
		this.#context.color = color;
	}

	set doubleMovePawn(pawn){
		this.#context.doubleMovePawn = pawn;
	}

	set enPassantTarget(square){
		this.#context.enPassantTarget = square;
	}

	set wk(value){
		this.#context.wk = value;
	}

	set wq(value){
		this.#context.wq = value;
	}

	set bk(value){
		this.#context.bk = value;
	}

	set bq(value){
		this.#context.bq = value;
	}

	// Stat

	get status(){
		return this.#context.status;
	}

	get isSetup(){
		return this.#context.isSetup;
	}

	get isMovement(){
		return this.#context.isMovement;
	}

	get isPromotion(){
		return this.#context.isPromotion;
	}

	get isDrawOffer(){
		return this.#context.isDrawOffer;
	}

	get isEnd(){
		return this.#context.isEnd;
	}

	get isWin(){
		return this.#context.isWin;
	}

	get isDraw(){
		return this.#context.isDraw;
	}

	get isImmediate(){
		return this.#context.isImmediate;
	}

	get isCheckmate(){
		return this.#context.isCheckmate;
	}

	get isStalemate(){
		return this.#context.isStalemate;
	}

	get winner(){
		return this.#context.winner;
	}

	get loser(){
		return this.#context.loser;
	}

	get subject(){
		return this.#context.subject;
	}

	get result(){
		return this.#context.result;
	}

	// I/O

	get fen(){
		return this.#context.fen;
	}

	set fen(fen){
		this.#context.fen = fen;
	}

	toString(){
		return this.fen;
	}

	// Events

	play(){
		return this.#context.play();
	}

	forfeit(color){
		return this.#context.forfeit(color);
	}

	resign(color){
		return this.#context.resign(color);
	}

	draw(color){
		return this.#context.draw(color);
	}

	flagFall(){
		return this.#context.flagFall();
	}

	move(move){
		return this.#context.move(move);
	}

	promote(piece){
		return this.#context.promote(piece);
	}

	// Log Events

	redo(){
		return this.#context.redo();
	}

	undo(){
		return this.#context.undo();
	}

	go(count){
		return this.#context.go(count);
	}

	goto(offset){
		return this.#context.goto(offset);
	}
}