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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\DAV\CalDAV\AppCalendar;
use OCA\DAV\CalDAV\Integration\ExternalCalendar;
use OCA\DAV\CalDAV\Plugin;
use OCP\Calendar\ICalendar;
use OCP\Calendar\ICreateFromString;
use OCP\Constants;
use Sabre\CalDAV\CalendarQueryValidator;
use Sabre\CalDAV\ICalendarObject;
use Sabre\CalDAV\Xml\Property\SupportedCalendarComponentSet;
use Sabre\DAV\Exception\Forbidden;
use Sabre\DAV\Exception\NotFound;
use Sabre\DAV\PropPatch;
use Sabre\VObject\Component\VCalendar;
use Sabre\VObject\Reader;
class AppCalendar extends ExternalCalendar {
protected string $principal;
protected ICalendar $calendar;
public function __construct(string $appId, ICalendar $calendar, string $principal) {
parent::__construct($appId, $calendar->getUri());
$this->principal = $principal;
$this->calendar = $calendar;
}
/**
* Return permissions supported by the backend calendar
* @return int Permissions based on \OCP\Constants
*/
public function getPermissions(): int {
// Make sure to only promote write support if the backend implement the correct interface
if ($this->calendar instanceof ICreateFromString) {
return $this->calendar->getPermissions();
}
return Constants::PERMISSION_READ;
}
public function getOwner(): ?string {
return $this->principal;
}
public function getGroup(): ?string {
return null;
}
public function getACL(): array {
$acl = [
[
'privilege' => '{DAV:}read',
'principal' => $this->getOwner(),
'protected' => true,
],
[
'privilege' => '{DAV:}write-properties',
'principal' => $this->getOwner(),
'protected' => true,
]
];
if ($this->getPermissions() & Constants::PERMISSION_CREATE) {
$acl[] = [
'privilege' => '{DAV:}write',
'principal' => $this->getOwner(),
'protected' => true,
];
}
return $acl;
}
public function setACL(array $acl): void {
throw new Forbidden('Setting ACL is not supported on this node');
}
public function getSupportedPrivilegeSet(): ?array {
// Use the default one
return null;
}
public function getLastModified(): ?int {
// unknown
return null;
}
public function delete(): void {
// No method for deleting a calendar in OCP\Calendar\ICalendar
throw new Forbidden('Deleting an entry is not implemented');
}
public function createFile($name, $data = null) {
if ($this->calendar instanceof ICreateFromString) {
if (is_resource($data)) {
$data = stream_get_contents($data) ?: null;
}
$this->calendar->createFromString($name, is_null($data) ? '' : $data);
return null;
} else {
throw new Forbidden('Creating a new entry is not allowed');
}
}
public function getProperties($properties) {
return [
'{DAV:}displayname' => $this->calendar->getDisplayName() ?: $this->calendar->getKey(),
'{http://apple.com/ns/ical/}calendar-color' => $this->calendar->getDisplayColor() ?: '#0082c9',
'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VEVENT', 'VJOURNAL', 'VTODO']),
];
}
public function calendarQuery(array $filters) {
$result = [];
$objects = $this->getChildren();
foreach ($objects as $object) {
if ($this->validateFilterForObject($object, $filters)) {
$result[] = $object->getName();
}
}
return $result;
}
protected function validateFilterForObject(ICalendarObject $object, array $filters): bool {
/** @var \Sabre\VObject\Component\VCalendar */
$vObject = Reader::read($object->get());
$validator = new CalendarQueryValidator();
$result = $validator->validate($vObject, $filters);
// Destroy circular references so PHP will GC the object.
$vObject->destroy();
return $result;
}
public function childExists($name): bool {
try {
$this->getChild($name);
return true;
} catch (NotFound $error) {
return false;
}
}
public function getChild($name) {
// Try to get calendar by filename
$children = $this->calendar->search($name, ['X-FILENAME']);
if (count($children) === 0) {
// If nothing found try to get by UID from filename
$pos = strrpos($name, '.ics');
$children = $this->calendar->search(substr($name, 0, $pos ?: null), ['UID']);
}
if (count($children) > 0) {
return new CalendarObject($this, $this->calendar, new VCalendar($children));
}
throw new NotFound('Node not found');
}
/**
* @return ICalendarObject[]
*/
public function getChildren(): array {
$objects = $this->calendar->search('');
// We need to group by UID (actually by filename but we do not have that information)
$result = [];
foreach ($objects as $object) {
$uid = (string)$object['UID'] ?: uniqid();
if (!isset($result[$uid])) {
$result[$uid] = [];
}
$result[$uid][] = $object;
}
return array_map(function (array $children) {
return new CalendarObject($this, $this->calendar, new VCalendar($children));
}, $result);
}
public function propPatch(PropPatch $propPatch): void {
// no setDisplayColor or setDisplayName in \OCP\Calendar\ICalendar
}
}
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