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<?php
declare(strict_types=1);
/**
* @copyright 2023 Ferdinand Thiessen <opensource@fthiessen.de>
*
* @author Ferdinand Thiessen <opensource@fthiessen.de>
*
* @license AGPL-3.0-or-later
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\DAV\CalDAV\AppCalendar;
use OCP\Calendar\ICalendar;
use OCP\Calendar\ICreateFromString;
use OCP\Constants;
use Sabre\CalDAV\ICalendarObject;
use Sabre\DAV\Exception\Forbidden;
use Sabre\DAV\Exception\NotFound;
use Sabre\DAVACL\IACL;
use Sabre\VObject\Component\VCalendar;
use Sabre\VObject\Property\ICalendar\DateTime;
class CalendarObject implements ICalendarObject, IACL {
private VCalendar $vobject;
private AppCalendar $calendar;
private ICalendar|ICreateFromString $backend;
public function __construct(AppCalendar $calendar, ICalendar $backend, VCalendar $vobject) {
$this->backend = $backend;
$this->calendar = $calendar;
$this->vobject = $vobject;
}
public function getOwner() {
return $this->calendar->getOwner();
}
public function getGroup() {
return $this->calendar->getGroup();
}
public function getACL(): array {
$acl = [
[
'privilege' => '{DAV:}read',
'principal' => $this->getOwner(),
'protected' => true,
]
];
if ($this->calendar->getPermissions() & Constants::PERMISSION_UPDATE) {
$acl[] = [
'privilege' => '{DAV:}write-content',
'principal' => $this->getOwner(),
'protected' => true,
];
}
return $acl;
}
public function setACL(array $acl): void {
throw new Forbidden('Setting ACL is not supported on this node');
}
public function getSupportedPrivilegeSet(): ?array {
return null;
}
public function put($data): void {
if ($this->backend instanceof ICreateFromString && $this->calendar->getPermissions() & Constants::PERMISSION_UPDATE) {
if (is_resource($data)) {
$data = stream_get_contents($data) ?: '';
}
$this->backend->createFromString($this->getName(), $data);
} else {
throw new Forbidden('This calendar-object is read-only');
}
}
public function get(): string {
return $this->vobject->serialize();
}
public function getContentType(): string {
return 'text/calendar; charset=utf-8';
}
public function getETag(): ?string {
return null;
}
public function getSize() {
return mb_strlen($this->vobject->serialize());
}
public function delete(): void {
if ($this->backend instanceof ICreateFromString && $this->calendar->getPermissions() & Constants::PERMISSION_DELETE) {
/** @var \Sabre\VObject\Component[] */
$components = $this->vobject->getBaseComponents();
foreach ($components as $key => $component) {
$components[$key]->STATUS = 'CANCELLED';
$components[$key]->SEQUENCE = isset($component->SEQUENCE) ? ((int)$component->SEQUENCE->getValue()) + 1 : 1;
if ($component->name === 'VEVENT') {
$components[$key]->METHOD = 'CANCEL';
}
}
$this->backend->createFromString($this->getName(), (new VCalendar($components))->serialize());
} else {
throw new Forbidden('This calendar-object is read-only');
}
}
public function getName(): string {
// Every object is required to have an UID
$base = $this->vobject->getBaseComponent();
// This should never happen except the app provides invalid calendars (VEvent, VTodo... all require UID to be present)
if ($base === null) {
throw new NotFound('Invalid node');
}
if (isset($base->{'X-FILENAME'})) {
return (string)$base->{'X-FILENAME'};
}
return (string)$base->UID . '.ics';
}
public function setName($name): void {
throw new Forbidden('This calendar-object is read-only');
}
public function getLastModified(): ?int {
$base = $this->vobject->getBaseComponent();
if ($base !== null && $this->vobject->getBaseComponent()->{'LAST-MODIFIED'}) {
/** @var DateTime */
$lastModified = $this->vobject->getBaseComponent()->{'LAST-MODIFIED'};
return $lastModified->getDateTime()->getTimestamp();
}
return null;
}
}
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