jQuery pub/sub plugin by Peter Higgins

pubsub.js

/*!
 * jQuery pub/sub plugin by Peter Higgins
 * https://github.com/phiggins42/bloody-jquery-plugins/blob/master/pubsub.js
 *
 * Modified by Tobin Bradley
 *
 * AFL/BSD Licensed
 */
;(function(d){
	// the topic/subscription hash
	var cache = {};

	// Publish some data on a named topic.
	d.publish = function(/* String */topic, /* Array? */args) {
		cache[topic] && d.each(cache[topic], function() {
			try {
				this.apply(d, args || []);
			} catch(err) {
				console.log(err);
			}
		});
	};

	// Register a callback on a named topic.
	d.subscribe = function(/* String */topic, /* Function */callback) {
		if ( ! cache[topic]) {
			cache[topic] = [];
		}
		cache[topic].push(callback);
		return [topic, callback]; // Array
	};

	// Disconnect a subscribed function for a topic.
	d.unsubscribe = function(/* String */topic, /* Function */callback) {
		cache[topic] && d.each(cache[topic], function(idx) {
			if (this == callback) {
				cache[topic].splice(idx, 1);
			}
		});
	};
    
	// List Subscribers
	d.subscribers = function(/* String */topic) {
		l = [];
		cache[topic] && d.each(cache[topic], function(idx){
			l.push(this.name);
		});
		return l;
	};
})(jQuery);