KitchenTimer (Node OOP example)

index.js

var KitchenTimer = require('./KitchenTimer');

console.dir(KitchenTimer);
console.dir(KitchenTimer.prototype);

var timer = KitchenTimer.create(1);

KitchenTimer.js

var oop = require('oop'); 
var EventEmitter = require('events').EventEmitter;
var util = require('util'); 
//console.dir(oop); doesnt have inherits method?


function KitchenTimer(properties) {   
  this._interval = null;   
  this._timeout = null;   
  this._minutes = null;   
  this._start = null;

  EventEmitter.call(this); ///////util.inherits(this, EventEmitter);   
  //oop.mixin(this, properties); 
}


KitchenTimer.SECOND = 1000; 
KitchenTimer.MINUTE = KitchenTimer.SECOND * 60;

KitchenTimer.create = function(minutes) {   
  var timer = new KitchenTimer();   
  timer.set(minutes);   
  return timer; 
}

KitchenTimer.prototype.set = function(minutes) {   
  var ms = minutes * KitchenTimer.MINUTE;   
  this._timeout = setTimeout(this._ring.bind(this), ms);   
  this._interval = setInterval(this._tick.bind(this), KitchenTimer.SECOND);

  this._minutes = minutes;   
  this._start = new Date(); 
};

KitchenTimer.prototype._tick = function() {   
  this.emit('tick'); 
};
KitchenTimer.prototype._ring = function() {   
  this.emit('ring');   
  this.reset(); 
}
KitchenTimer.prototype.reset = function() {   
  clearTimeout(this._timeout);   
  clearInterval(this._interval);

  //oop.reset(this); 
}

KitchenTimer.prototype.remaining = function() {   
  var ms = (new Date() - this._start);   
  var minutes = ms / KitchenTimer.MINUTE;   
  return minutes; 
};

KitchenTimer.prototype.__proto__ = EventEmitter.prototype;

module.exports = KitchenTimer;