2019js13k/js/Game.js

require('MainMenu');
require('World');

class Game {
	constructor() {
		this.container = null;
		this.theater = null;
		this.canvas = null;
		this.system = null;

		this.state = "mainmenu";
		this.stage = null;
		this.stages = [];
	}

	init(system, container, canvas) {
		this.system = system;
		this.container = container;
		this.canvas = canvas;
		this.theater = this;

		this.stages.push(new MainMenu());
		this.stages.push(new World());

		this.changeStage("mainmenu");
	}

	changeStage(newstage) {
		if (this.stage != null && this.stage.end) {
			this.stage.end();
		}
		this.state = newstage;
		switch (this.state) {
			case "mainmenu":
				this.stage = this.stages[0];
				break;
			case "world":
				this.stage = this.stages[1];
				break;
		}
		this.stage.init(this.system, this.canvas);
	}

	updateDelta(delta, canvas) {
		this.stage.updateDelta(delta, canvas);
	}

	draw(context) {
		this.stage.draw(context);
	}

	handleResize(canvas) {
		if (!this.stage.hasOwnProperty("handleResize")) { return; }
		this.stage.handleResize(canvas);
	}
};