TrackCategories.php

<?php
/**
 * Track Categories Extension - Track page views by category
 *
 * @file
 * @ingroup Extensions
 * @version 1.0 (r22336)
 * @author Przemek Piotrowski (Nef) <ppiotr@wikia-inc.com>
 */

if ( !defined( 'MEDIAWIKI' ) ) {
	die( 'This file is an extension to the MediaWiki software and cannot be used standalone.' );
}

$wgExtensionCredits['other'][] = array(
	'name' => 'TrackCategories',
	'version' => '1.0',
	'author' => 'Przemek Piotrowski (Nef)',
	'description' => 'Track page views by category',
	'svn-date' => '$LastChangedDate: 2010-06-07 12:06:34 +0000 (Mon, 07 Jun 2010) $',
	'svn-revision' => '$LastChangedRevision: 22336 $',
);

$wgHooks['SkinAfterBottomScripts'][] = 'wfTrackCategoriesHook';

function wfTrackCategoriesHook( $skin, &$text ) {
	if ( $skin->getTitle()->getNamespace() == NS_MAIN ) {
		$text .= "<script type=\"text/javascript\">/*<![CDATA[*/
			var trackCategoriesRemove = wgArticlePath.replace( \"\$1\", encodeURIComponent( wgFormattedNamespaces[14] ) ).length + 1;
			$( '#mw-normal-catlinks > span > a, #mw-hidden-catlinks > span > a' ).each( function( e ) {
				WET.byStr( 'catview/' + $( this ).attr( 'href' ).substring( trackCategoriesRemove ) );
			});
		/*]]>*/</script>\n";
	}

	return true;
}