pong-ml/js/Game.js

require("Paddle");
require("Ball");

class Game {
	engine = null;
	paddles = {};
	gameActive = true;
	constructor() {
		this.paddles['left'] = new Paddle('left');
		this.paddles['right'] = new Paddle('right');
		this.ball = new Ball();
	}

	init(engine) {
		this.engine = engine;
		this.rounds = 11;

		for(let index in this.paddles) {
			this.paddles[index].init(this);
		}
		this.ball.init(this);

		this.gameActive = true;
		this.winner = "";
		this.finalScore = 0;
	}

	update(delta) {
		if(this.ball.isDead() && this.rounds <= 0) {
			this.gameActive = false;
			this.finalScore = 0;
			this.winner = "";
			for(let index in this.paddles) {
				let paddleScore = this.paddles[index].getScore();
				if(paddleScore > this.finalScore) {
					this.finalScore = paddleScore;
					this.winner = index;
				}
			}
			return;
		}

		for(let index in this.paddles) {
			this.paddles[index].update(delta);
		}
		this.ball.update(delta);

		if(this.ball.isDead()) {
			this.rounds--;
			if(this.rounds > 0) {
				this.ball.init(this);
			}
		}
	}

	draw(context) {
		if(!this.gameActive) {
			context.fillStyle = "#000000";
			context.beginPath();
			context.rect(0, 0, this.getWidth(), this.getHeight());
			context.fill();

			context.fillStyle = "#FFFFFF";
			context.textAlign = "center";

			context.font = "18px Arial";
			context.fillText("winner:", this.getWidth() / 2, this.getHeight() * 0.2);
			context.font = "30px Arial";
			context.fillText(this.winner, this.getWidth() / 2, this.getHeight() * 0.4);
			context.font = "48px Arial";
			context.fillText(this.finalScore, this.getWidth() / 2, this.getHeight() * 0.7);
			return;
		}

		context.fillStyle = "#000000";
		context.textAlign = "center";
		context.font = "14px Arial";
			
		for(let index in this.paddles) {
			context.fillText(this.paddles[index].getScore(), this.paddles[index].getPosition().x, 10);
			this.paddles[index].draw(context);
		}
		this.ball.draw(context);
	}

	collideSide(collisionBox) {
		let collisionSide = "";
		for(let side in collisionBox) {
			let collider = collisionBox[side];
			if(side == "top" || side == "left") {
				if(collider < 0) {
					return side;
				}
			}
			if(side == "bottom" && collider > this.getHeight()) {
				return side;
			}
			if(side == "right" && collider > this.getWidth()) {
				return side;
			}
		}
	}

	getWidth() {
		return this.engine.viewport.w;
	}

	getHeight() {
		return this.engine.viewport.h;
	}

	getBallPosition() {
		return {x: this.ball.position.x, y: this.ball.position.y};
	}

	getPaddle(side) {
		return this.paddles[side];
	}
}