<?php

defined('_JEXEC') or die('Access denied');

jimport('joomla.methods');

// This helper logs page views.
abstract class PiwikHelper {
	const MAX_DATA = 200;

	// Log a page view in Piwik.
	// $title the page title to log
	// $data the data to log
	public static function logPageView($title, $data) {
		$parameters = JComponentHelper :: getParams('com_openaire');
		$url = $parameters -> get('piwikUrl');
		$siteId = $parameters -> get('piwikSiteId');
		$document = JFactory :: getDocument();
		$document -> addScript(JRoute :: _($url . 'piwik.js'));
		$document -> addScriptDeclaration('try{');
		$document -> addScriptDeclaration('var tracker = Piwik.getTracker(\'' . $url . 'piwik.php\', ' . $siteId . ');');
		$document -> addScriptDeclaration('tracker.setDocumentTitle(\''. $title . '\');');
		$document -> addScriptDeclaration('tracker.setCustomVariable(1, \'user\', \'' . JFactory :: getUser() -> email . '\', \'page\');');
		$document -> addScriptDeclaration('tracker.setCustomVariable(2, \'session\', \'' . JFactory :: getSession() -> getId() . '\', \'page\');');
		$document -> addScriptDeclaration('tracker.setCustomVariable(3, \'data\', \'' . substr($data, 0, self :: MAX_DATA) . '\', \'page\');');
		$document -> addScriptDeclaration('tracker.setCustomVariable(4, \'data\', \'' . substr($data, self :: MAX_DATA, 2 * self :: MAX_DATA) . '\', \'page\');');
		$document -> addScriptDeclaration('tracker.setCustomVariable(5, \'data\', \'' . substr($data, 2 * self :: MAX_DATA, 3 * self :: MAX_DATA) . '\', \'page\');');
		$document -> addScriptDeclaration('tracker.trackPageView(\'' . $title . '\');');
		$document -> addScriptDeclaration('}');
		$document -> addScriptDeclaration('catch(e){;}');
	}
}