nextcloud/apps/calendar/ajax/editeventform.php

<?php
/**
 * Copyright (c) 2011 Bart Visscher <bartv@thisnet.nl>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

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

if(!OC_USER::isLoggedIn()) {
	die('<script type="text/javascript">document.location = oc_webroot;</script>');
}
OC_JSON::checkAppEnabled('calendar');

$id = $_GET['id'];
$data = OC_Calendar_App::getEventObject($id);
$object = OC_VObject::parse($data['calendardata']);
$vevent = $object->VEVENT;

$dtstart = $vevent->DTSTART;
$dtend = OC_Calendar_Object::getDTEndFromVEvent($vevent);
switch($dtstart->getDateType()) {
	case Sabre_VObject_Element_DateTime::LOCALTZ:
	case Sabre_VObject_Element_DateTime::LOCAL:
		$startdate = $dtstart->getDateTime()->format('d-m-Y');
		$starttime = $dtstart->getDateTime()->format('H:i');
		$enddate = $dtend->getDateTime()->format('d-m-Y');
		$endtime = $dtend->getDateTime()->format('H:i');
		$allday = false;
		break;
	case Sabre_VObject_Element_DateTime::DATE:
		$startdate = $dtstart->getDateTime()->format('d-m-Y');
		$starttime = '';
		$dtend->getDateTime()->modify('-1 day');
		$enddate = $dtend->getDateTime()->format('d-m-Y');
		$endtime = '';
		$allday = true;
		break;
}

$summary = $vevent->getAsString('SUMMARY');
$location = $vevent->getAsString('LOCATION');
$categories = $vevent->getAsArray('CATEGORIES');
$repeat = $vevent->getAsString('CATEGORY');
$description = $vevent->getAsString('DESCRIPTION');
foreach($categories as $category){
	if (!in_array($category, $category_options)){
		array_unshift($category_options, $category);
	}
}
$last_modified = $vevent->__get('LAST-MODIFIED');
if ($last_modified){
	$lastmodified = $last_modified->getDateTime()->format('U');
}else{
	$lastmodified = 0;
}

$calendar_options = OC_Calendar_Calendar::allCalendars(OC_User::getUser());
$category_options = OC_Calendar_App::getCategoryOptions();
$repeat_options = OC_Calendar_App::getRepeatOptions();

$tmpl = new OC_Template('calendar', 'part.editevent');
$tmpl->assign('id', $id);
$tmpl->assign('lastmodified', $lastmodified);
$tmpl->assign('calendar_options', $calendar_options);
$tmpl->assign('category_options', $category_options);
$tmpl->assign('repeat_options', $repeat_options);

$tmpl->assign('title', $summary);
$tmpl->assign('location', $location);
$tmpl->assign('categories', $categories);
$tmpl->assign('calendar', $data['calendarid']);
$tmpl->assign('allday', $allday);
$tmpl->assign('startdate', $startdate);
$tmpl->assign('starttime', $starttime);
$tmpl->assign('enddate', $enddate);
$tmpl->assign('endtime', $endtime);
$tmpl->assign('repeat', $repeat);
$tmpl->assign('description', $description);
$tmpl->printpage();
?>