// Adapted from Object.Event by Ryan Johnson (http://livepipe.net/projects/object_event/)

Object.Event = {
  extend: function(object) {
    Object.extend(object, Object.Event.Methods);
    if(object.prototype) Object.extend(object.prototype, Object.Event.Methods);
    return object;
  }
}

Object.Event.Methods = {
	_objectEventSetup: function(event) {
		this._observers = this._observers || {};
		this._observers[event] = this._observers[event] || [];
	},
	
	observe: function(event, observer) {
		if(typeof(event) == 'string' && typeof(observer) != 'undefined') {
			this._objectEventSetup(event);
			if(!this._observers[event].include(observer))
				this._observers[event].push(observer);
		} else {
			for(var e in event) this.observe(e,event[e]);
		}
	},
	
	stopObserving: function(event, observer) {
		this._objectEventSetup(event);
		this._observers[event] = this._observers[event].without(observer);
	},
	
	notify: function(event, args) {
		this._objectEventSetup(event);
	  return this._observers[event].collect(function(observer) {
	    observer.apply(observer, args)
	  }.bind(this));
	}
}