emitter.js

define(['common', 'async'], function(common, async) {

	'use strict';

	function Emitter() {

		this.events = {};

	}

	Emitter.prototype.emit = function(event, payload) {

		if (this.events[event]) {
			async.each(function(listener) {
				listener.call(this, payload);
			}, function() {
				// finalizer?
			});
		}

	};

	Emitter.prototype.bind = function(event, listener) {

		if (!this.events[event])
			this.events[event] = [];

		this.events[event].push(listener);

	};

	function makeEmitter(derived) {
		common.__extends(derived, Emitter);
	}

	return {
		extend: makeEmitter
	};

});