GAnalytics.integrate.php

<?php
/**
 * Google Analytics tracking
 */

if (!defined('ELK'))
	die('No access...');

class GAnalytics_Integrate
{
	public static function load_theme()
	{
		global $modSettings, $user_info;

		// No tracking code on xml or api requests
		if (isset($_REQUEST['xml']) || isset($_REQUEST['api']))
			return;

		// As well as if the tracking code is not set
		if (empty($modSettings['ga_tracking_code']))
			return;

		if (!empty($modSettings['ga_tracking_only_guests']) && !$user_info['is_guest'])
			return;

		if (empty($modSettings['ga_tracking_adminpages']) && isset($_REQUEST['action']) && $_REQUEST['action'] == 'admin')
			return;

		addInlineJavascript('
	(function(i,s,o,g,r,a,m){i[\'GoogleAnalyticsObject\']=r;i[r]=i[r]||function(){
	(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
	m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
	})(window,document,\'script\',\'//www.google-analytics.com/analytics.js\',\'ga\');

	ga(\'create\', \'' . $modSettings['ga_tracking_code'] . '\', \'auto\');
	ga(\'send\', \'pageview\');', true);
	}

	public static function general_mod_settings(&$config_vars)
	{
		global $txt;

		loadLanguage('GAnalytics');
		$config_vars[] = array('text', 'ga_tracking_code', 'subtext' => $txt['ga_tracking_code_description']);
		$config_vars[] = array('check', 'ga_tracking_adminpages');
		$config_vars[] = array('check', 'ga_tracking_only_guests');

		addInlineJavascript('
			$(document).ready(function() {
				$("#ga_tracking_code").change(function() {
					var val = $(this).val();
					if (val.indexOf("<script") !== -1)
					{
						var regex = /UA-\d{7}-\d/;
						var match = regex.exec(val)
						$(this).val(match);
					}
				});
			});', true);
	}

	public static function save_general_mod_settings()
	{
		if (!empty($_POST['ga_tracking_code']))
		{
			// I doubt this will ever happen, because Elk strips the script tag
			if (strpos('<script', $_POST['ga_tracking_code']) !== false)
				$clean_tracking = self::extractUA($_POST['ga_tracking_code']);
			else
				$clean_tracking = preg_replace('~[^\w\d\-]~', '', $_POST['ga_tracking_code']);
			if (preg_match('~^UA-\d{7}-\d$~', $clean_tracking) === 0)
				unset($_POST['ga_tracking_code']);
			else
				$_POST['ga_tracking_code'] = $clean_tracking;
		}
	}

	protected static function extractUA($val)
	{
		preg_match('~\'(UA-\d{7}-\d)\'~', $val, $matches);
		print_r($matches);die();
		if (isset($matches[1]))
			return $matches[1];
		else
			return '';
	}
}