Google Analytics for MediaWiki

GoogleAnalytics.php

<?php
/*
 * Google Analytics integration for MediaWiki
 * Based on extension by Tim Laqua: http://www.mediawiki.org/wiki/Extension:Google_Analytics_Integration
 *
 * Usage:
 * - Drop GoogleAnalytics.php to your extensions/ dir
 * - In SystemConfig.php add:
 *
 *   require_once( "$IP/extensions/GoogleAnalytics.php" );
 *   GoogleAnalytics::$account = 'UA-YOUR TRACKING NUMBER';
 * - See GoogleAnalytics class' static variables for other tracking options
 */

if ( !defined( 'MEDIAWIKI' ) )
{
    die( 'This file is a MediaWiki extension, it is not a valid entry point' );
}

$wgGoogleAnalytics = new GoogleAnalytics();
$wgHooks['BeforePageDisplay'][] = $wgGoogleAnalytics;

class GoogleAnalytics
{
    /**
     * Google Analytics Account (UA-XXXX-XXXX)
     */
    public static $account = '';
    
    /**
     * Whether to render GA tracking code
     */
    public static $enable = true;
    
    /**
     * Don't render GA for users with 'protect' rights
     */
    public static $ignoreSysops = true;
    
    /**
     * Don't render GA for users with 'bot' rights
     */
    public static $ignoreBots = true;
    

    function onBeforePageDisplay( &$out)
    {
        if(!self::$enable || empty(self::$account))
        {
            $out->addInlineScript('// GoogleAnalytics disabled');
            return true;
        }
    
        global $wgUser;
        $this->user = $wgUser;
        $out->addInlineScript( $this->generate() );
    
        return true;
    }
    
    function generate()
    {
        if (!$this->user->isAllowed('bot') || !self::$ignoreBots)
        {
            if (!$this->user->isAllowed('protect') || !self::$ignoreBots)
            {
                $account = self::$account;
                $funcOutput = <<<GASCRIPT
var _gaq = _gaq || [];
_gaq.push(['_setAccount', '{$account}']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
GASCRIPT;
            }
            else
            {
                $funcOutput = "// GoogleAnalytics disabled for users with 'protect' rights (I.E. sysops)";
            }
        }
        else
        {
            $funcOutput = "// GoogleAnalytics disabled for bots";
        }

        return $funcOutput;
    }
}