OwncloudContactsOfficial/ajax/categories/categoriesfor.php

<?php
/**
 * Copyright (c) 2012 Thomas Tanghus <thomas@tanghus.net>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

 
OCP\JSON::checkLoggedIn();
OCP\JSON::checkAppEnabled('contacts');

$id = isset($_GET['id'])?$_GET['id']:null;
if(is_null($id)) {
	OCP\JSON::error(array('data' => array('message' => OC_Contacts_App::$l10n->t('No ID provided'))));
	exit();
}
$vcard = OC_Contacts_App::getContactVCard( $id );
foreach($vcard->children as $property){
	//OCP\Util::writeLog('contacts','ajax/categories/checksumfor.php: '.$property->name, OCP\Util::DEBUG);
	if($property->name == 'CATEGORIES') {
		$checksum = md5($property->serialize());
		OCP\JSON::success(array('data' => array('value'=>$property->value, 'checksum'=>$checksum)));
		exit();
	}
}
OCP\JSON::error(array('data' => array('message' => OC_Contacts_App::$l10n->t('Error setting checksum.'))));