nextcloud/apps/calendar/ajax/activation.php

<?php
/*************************************************
 * ownCloud - Calendar Plugin                     *
 *                                                *
 * (c) Copyright 2011 Bart Visscher               *
 * License: GNU AFFERO GENERAL PUBLIC LICENSE     *
 *                                                *
 * If you are not able to view the License,       *
 * <http://www.gnu.org/licenses/>                 *
 * please write to the Free Software Foundation.  *
 * Address:                                       *
 * 59 Temple Place, Suite 330, Boston,            *
 * MA 02111-1307  USA                             *
 *************************************************/
require_once ("../../../lib/base.php");
if(!OC_USER::isLoggedIn()) {
	die("<script type=\"text/javascript\">document.location = oc_webroot;</script>");
}
$calendarid = $_POST['calendarid'];
OC_Calendar_Calendar::setCalendarActive($calendarid, $_POST['active']);
$cal = OC_Calendar_Calendar::findCalendar($calendarid);
echo $cal['active'];