omniture-track.js

$(function(){
	/** Constants **/
	var ATTRIBUTE_PREFIX = 'track';
	var ATTRIBUTE_EVENT_TYPE = "event-type"
	var RESERVED_ATTRIBUTES = [
		'events',	// Reserved for Omniture
		'eventType', // Reserved for client-side event type
		'linkType',	// Reserved for Omniture
		'vars' // Reserved for Omniture
	];
	var JQUERY_PSEUDOS = {
		'attr': pseudoAttr
	};

	registerPseudos();
	init();

	/**
	 * Scrubs DOM and attaches appropriate event listeners for triggering Omniture tracking
	 */
	function init() {
		$(":attr('^data-track')").each(function(idx,el){
			var $el = $(el);
			$el.on($el.data(ATTRIBUTE_PREFIX + '-' + ATTRIBUTE_EVENT_TYPE), doTrack);
		});
	}

	/**
	 * Gets appropriate 'track' attributes and sends them to Omniture
	 */
	function doTrack(evt) {
		var $el = $(evt.target);
		var attr = getTrackAttributes($el);

		console.log(attr);

		omnitureTrack(attr);
	}

	function omnitureTrack(attr){
		//s.clearVars();

		jQuery.each(attr, function (key, val){
			
		});

		//s.tl('', 'o');
	}

	/**
	 *	Finds and separates reserved [ATTRIBUTE_PREFIX] data attributes
	 */
	function getTrackAttributes($el) {
		var dataAttr = $el.data();
		var attr = {
			props: {},
			reserved: {}
		};

		jQuery.each(dataAttr, function(key, val) {
			var reg = new RegExp("^" + ATTRIBUTE_PREFIX + "([^\S]+)");
			var eqDirty = reg.exec(key)[1];
			var eq = eqDirty.substr(0,1).toLowerCase() + eqDirty.substr(1);
			if (RESERVED_ATTRIBUTES.indexOf(eq) == -1) 
				attr.props[eq] = val;
			else 
				attr.reserved[eq] = val;
		});

		return attr;
	}

	/**
	 * Register special jQuery selectors (i.e. ":attr()")
	 */
	function registerPseudos(){
		jQuery.each(JQUERY_PSEUDOS, function(key, val){
			if (jQuery.expr.pseudos[key] == undefined){
				val();
			} else {
				console.log('jQuery pseudo: "' + key + '" already set', "hey");
			}
		});

	}

	/**
	 * Allow for advanced attribute selectors (with wildcards)
	 */
	function pseudoAttr(){
		jQuery.expr.pseudos.attr = $.expr.createPseudo(function(arg) {
		    var regexp = new RegExp(arg);
		    return function(elem) {
		        for(var i = 0; i < elem.attributes.length; i++) {
		            var attr = elem.attributes[i];
		            if(regexp.test(attr.name)) {
		                return true;
		            }
		        }
		        return false;
		    };
		});	
	}
});