pixi-timer-events/src/Timer.ts

A type-based Entity Component System. Implemented in TypeScript

import { EventEmitter} from "eventemitter3"
import TimerManager from "./TimerManager";

export default class Timer extends EventEmitter {
	public time: number;
	public active: boolean;
	public isEnded: boolean;
	public isStarted: boolean;
	public expire: boolean;
	public delay: number;
	public repeat: number;
	public loop: boolean;
	public manager: TimerManager;

	private _delayTime: number;
	private _elapsedTime: number;
	private _repeat: number;

	constructor(time = 1, manager){
		super();
		this.time = time;
		if(manager)this.addTo(manager);

		this.active = false;
		this.isEnded = false;
		this.isStarted = false;
		this.expire = false;
		this.delay = 0;
		this.repeat = 0;
		this.loop = false;

		this._delayTime = 0;
		this._elapsedTime = 0;
		this._repeat = 0;
	}

	addTo(manager){
		this.manager = manager;
		this.manager.addTimer(this);
		return this;
	}

	remove(){
		if(!this.manager)return;
		this.manager.removeTimer(this);
		return this;
	}

	start(){
		this.active = true;
		return this;
	}

	stop(){
		this.active = false;
		this.emit('stop', this._elapsedTime);
		return this;
	}

	reset(){
		this._elapsedTime = 0;
		this._repeat = 0;
		this._delayTime = 0;
		this.isStarted = false;
		this.isEnded = false;
		return this;
	}

	update(delta, deltaMS){
		if(!this.active)return;
		if(this.delay > this._delayTime){
			this._delayTime += deltaMS;
			return;
		}

		if(!this.isStarted){
			this.isStarted = true;
			this.emit('start', this._elapsedTime);
		}

		if(this.time > this._elapsedTime){
			let t = this._elapsedTime+deltaMS;
			let ended = (t>=this.time);

			this._elapsedTime = (ended) ? this.time : t;
			this.emit('update', this._elapsedTime, delta);

			if(ended){
				if(this.loop || this.repeat > this._repeat){
					this._repeat++;
					this.emit('repeat', this._elapsedTime, this._repeat);
					this._elapsedTime = 0;
					return;
				}

				this.isEnded = true;
				this.active = false;
				this.emit('end', this._elapsedTime);
			}
		}
	}
}