/*
 * window.Notification polyfill
 * @author Emilio Cobos (http://emiliocobos.net)
 */

/* try prefixed */
if( ! window.Notification ) {
  window.Notification = (function() {
		return window.Notification || window.webkitNotification || window.mozNotification || window.oNotification || window.msNotification;
	})()
}

/* request pemission: */
if( window.Notification.permission === 'default' ) {
	window.Notification.requestPermission(/* function(permission) {} */);
}

/* If not standard (webkit first implementation) */
if( ! window.Notification && window.webkitNotifications ) {
	window.webkitNotifications.requestPermission();
	if( window.webkitNotifications.checkPermission() === 0 ) {
		window.Notification = (function(){
			var notifications_cache = {};
			return function(title, options) {
				var notification,
				tagNotifications,
				tagNotification;
				options = options || {};
				
				notification = window.webkitNotifications.createNotification(options.iconUrl || options.icon, title, options.body || '');

				if( options.onshow ) {
					notification.ondisplay = options.onshow;
				}

				if( options.onclick ) {
					notification.onclick = options.onclick;
				}

				if( options.onclose ) {
					notification.onclose = options.onclose;
				}

				if( options.onerror ) {
					notification.onerror = options.onerror;
				}

				if( options.tag ) {
					tagNotifications = notifications_cache[options.tag] = notifications_cache[options.tag] || [];
					while( tagNotification = tagNotifications.shift() ) {
						tagNotification.close();
					}
					notifications_cache[options.tag].push(notification);
				}

				return notification;
			}
			window.Notification.requestPermission = function(cb) {
				return window.webkitNotifications.requestPermission(cb);
			}
		})()
	}
}