nextcloud/apps/calendar/ajax/newevent.php

<?php
/**
 * Copyright (c) 2011 Georg Ehrke <ownclouddev at georgswebsite dot de>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

require_once('../../../lib/base.php');

$l10n = new OC_L10N('calendar');

OC_JSON::checkLoggedIn();
OC_JSON::checkAppEnabled('calendar');

$errarr = OC_Calendar_Object::validateRequest($_POST);
if($errarr){
	//show validate errors
	OC_JSON::error($errarr);
	exit;
}else{
	$cal = $_POST['calendar'];
	$vcalendar = OC_Calendar_Object::createVCalendarFromRequest($_POST);
	$result = OC_Calendar_Object::add($cal, $vcalendar->serialize());
	OC_JSON::success();
}
?>