///////
// gaAddons.js
// 	@Author Stéphane Hamel - shamel67@gmail.com - http://immeria.net
//	@Author Andy Edmonds - http://alwaysbetesting.com
//	@Author Damon Gudaitis - http://www.damongudaitis.com/
//	
///////
// License: Version: MPL 1.1
// The contents of this file are subject to the Mozilla Public License Version
// 1.1 (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
// http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
// for the specific language governing rights and limitations under the
// License.
//
// Changelog:
//  v3.1 - Oct. 30 2009 - Fixed "/undefined" for downloads, fixed missing "/" from url's  
//  v3.0 - Oct. 27 2009 - Incorporated into CP.com source - Download listener moved after outbound listener, fixed undefined or null hostname (?)  
//  v2.6 - Oct. 22 2009 - Fix outbound link sometime showing //
//  v2.5 - Jun. 1st 2009 - Make sure to load at "onload", rewritten as an object
//  v2.4 - Apr. 21st 2009 - Fix trackPageview() syntax
//  v2.3 - Apr. 10th 2009 - Fix logic issues. Add tracking of mailto links. Allow tracker to be named something else than pageTracker
//  v2.2 - Mar. 20nd 2009 - Fix issue with tracking download docs on current domain
//  v2.1 - Jan. 22nd 2009 - Set bUseEventForOutbout and bUserEventForDownload to toggle use of Events or Page Views
// 	v2.0 - Jan. 2009 - Use Google Analytics Events to track downloads and external links
//  v1.0 - Inspired by the work of Justin Cutroni - Google Analytics Short Cut - http://gashortcut.com/
///////

/*
 * @fileoverview Wrapper for gaAddons
 */
var bUseEventForOutbound = true; // Set to false to use trackPageview for outbount links
var bUseEventForDownload = true; // Set to false to use trackPageview for downloads
var gaA_fileTypes = new RegExp(/\.(docx*|xlsx*|pptx*|exe|zip|pdf|xpi)$/i);
// Indicate each file extension that needs to be tracked, gaA_fileTypes is the regular expression that matches downloadable files
var gaA_pageTracker = pageTracker; // Should be set to the name of your tracker variable

/// No need to change anything below this line
/**
 * @class ga Addons component.
 *     This class encapsulates all logic for the Google Analytics addons
 * @constructor
 */
var gaAddons = function(){
	/**
	 * startListening: add a new listner for onclick event, handle Mozilla or IE methods
	 * @param {Object} obj HREF object to listen to
	 * @param {String} evnt event type (usually "click")
	 * @param {Object} func Function to call when evnt is triggered
	 */
	var startListening = function(obj, evnt, func) {
		if( obj.addEventListener ) { 
			obj.addEventListener(evnt, func, false);
		}
		else if( obj.attachEvent ) { 
    	obj.attachEvent("on" + evnt, func);
		}
	};
    
	/**
	 * trackDocument: make GA call when downloading one of detected file extension, use trackEvent() or trackPageView() methods
	 * @param {Object} evnt Object where the event happened
	 */
	var trackDocument = function(evnt) {
		evnt = evnt || event;
		var elmnt = evnt.srcElement || evnt.target;
		if( !elmnt.pathname || elmnt.pathname == 'undefined') { return; }
		var pathname = ("/" + elmnt.pathname).replace(/\/\//, '/');
		bUseEventForDownload ? gaA_pageTracker._trackEvent("download", "click", pathname) : gaA_pageTracker._trackPageview("/download" + pathname);
	};
    
	/**
	 * trackExternalLink: make GA call when clicking an outbound link, use trackEvent() or trackPageView() methods
	 * @param {Object} evnt Object where the event happened
	 */
	var trackExternalLink = function(evnt){
		evnt = evnt || event;
		var elmnt = evnt.srcElement||evnt.target;
		if( elmnt ) {
			while( elmnt.tagName != "A" ) { 
				elmnt = elmnt.parentNode;
			}
			if( /http/.test(elmnt.protocol) ) {
				if( !elmnt.hostname || elmnt.hostname == 'undefined' ) { return; }
				bUseEventForOutbound ? gaA_pageTracker._trackEvent("outbound", "click", (elmnt.hostname + "/" + elmnt.pathname + elmnt.search).replace(/\/\//,'/')) : gaA_pageTracker._trackPageview(("/outbound/" + elmnt.hostname + "/" + elmnt.pathname + elmnt.search).replace(/\/\//,''));
			}
			if( elmnt.protocol == "mailto:" ) { 
				bUseEventForOutbound ? gaA_pageTracker._trackEvent("mailto", "click", elmnt.href.replace(/mailto:/, "")) : gaA_pageTracker._trackPageview("/mailto/" + elmnt.href.replace(/mailto:/));
			}
		}
		else {
			if( /http/.test(this.protocol) ) {
				if( !this.hostname || this.hostname == 'undefined' ) { return; }
				bUseEventForOutbound ? gaA_pageTracker._trackEvent("outbound", "click", this.hostname + this.pathname + this.search) : gaA_pageTracker._trackPageview("/outbound/" + this.hostname + this.pathname + this.search);
			}
			if( this.protocol == "mailto:" ) { 
				bUseEventForOutbound ? gaA_pageTracker._trackEvent("mailto", "click", this.href.replace(/mailto:/, "")) : gaA_pageTracker._trackPageview("/mailto/" + this.href.replace(/mailto:/));
			}
		}
	};

	/**
	 * Initialize gaAddons
	 */
	if( document.getElementsByTagName && typeof gaA_pageTracker == "object" ) {
		var hrefs = document.getElementsByTagName('a');
		for( var l = 0, m = hrefs.length; l < m; l++ ) {
			if( hrefs[l].hostname != location.hostname ) {
				startListening(hrefs[l], "click", trackExternalLink);
			}
			else if( gaA_fileTypes.test(hrefs[l].pathname) ) { 
				startListening(hrefs[l], "click", trackDocument);
			}
		}
	}
};

if (window.addEventListener) // Standard
    window.addEventListener('load', gaAddons, false);
else 
    if (window.attachEvent) // IE
        window.attachEvent('onload', gaAddons);
/// EOF ///