xchess/lib/draw-offer.js

Chess Engine

export {IdleDrawOffer}

import {Color} from './color.js'

class IdleDrawOffer {

	#context;

	constructor(context){
		this.#context = context;
	}

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

	get isDrawOffer(){
		return false;
	}

	next(){
		return this;
	}

	draw(color){
		const drawOffer = new DrawOffer(this.context, color);
		this.context.drawOffer = drawOffer;
		this.context.emit('draw-offer');
		return true;
	}
}

class DrawOffer {

	#context;
	#color;
	#time = new Date();

	constructor(context, color){
		this.#context = context;
		this.#color = Color.from(color);
	}

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

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

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

	get isDrawOffer(){
		return true;
	}

	draw(color){
		if(this.color.opposite(color)){
			this.context.toDraw(this.color);
			return true;
		} return false;
	}

	next(){
		if(this.color === this.context.color)
			return this;
		return new IdleDrawOffer(this.context);
	}
}