notifications.js

;(function ($) {
	"use strict";
	var observers = [];

	var checkedNotification = function (notification) {
		if (notification.hasOwnProperty('name')) {
			return $.extend({id: null}, notification);
		} else {
			throw 'notification must have a name';
		}
	};

	$.addNotificationObserver = function (observer, notification) {
		observers.push({
			callback: observer,
			notification: checkedNotification(notification)
		});
	};

	$.removeNotificationObserver = function (observer) {
		observers = observers.filter(function (o) {
			return o.callback != observer;
		});
	};

	$.postNotification = function (notification) {
		notification = checkedNotification(notification);
		observers.forEach(function (observer) {
			if (notification.name == observer.notification.name) {
				if (!observer.notification.id || observer.notification.id == notification.id) {
					observer.callback(notification);
				}
			}
		});
	};

}(jQuery));