class com.overset.Observer {

	private var subscribers:Array;
	
	function Observer () {
		this.subscribers = new Array();
	}
	
	public function addSubscriber (classInstance):Boolean {
		for (var i=0; i < this.subscribers.length; i++) {
			if (this.subscribers[i] === classInstance) {
				return false;
			}
		}
		this.subscribers.push(classInstance);
		return true;
	}
	
	public function removeSubscriber (classInstance):Boolean {
		for (var i in subscribers) {
			if (this.subscribers[i] === classInstance) {
				this.subscribers.splice(i, 1);
				return true;
			}
		}
		return false;
	}

	public function iToggle (toggle:Boolean):Void {
		// reverse the subscribers in a new temporary array
		var tmpSubscribers:Array = this.subscribers;
		tmpSubscribers.reverse();
		for (var i in tmpSubscribers) {
			if (toggle == true && typeof tmpSubscribers[i]._on == "function") tmpSubscribers[i]._on();
			if (toggle == false && typeof tmpSubscribers[i]._off == "function") tmpSubscribers[i]._off();
		}
	}

	public function update ():Void {
		// reverse the subscribers in a new temporary array
		var tmpSubscribers:Array = this.subscribers;
		tmpSubscribers.reverse();
		for (var i in tmpSubscribers) {
			if (typeof tmpSubscribers[i]._update == "function") {
				tmpSubscribers[i]._update();
			}
		}
	}
	
}