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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\DAV\SystemTag;
use OCP\IGroupManager;
use OCP\IUserSession;
use OCP\SystemTag\ISystemTag;
use OCP\SystemTag\ISystemTagManager;
use OCP\SystemTag\TagNotFoundException;
use Sabre\DAV\Exception\BadRequest;
use Sabre\DAV\Exception\Forbidden;
use Sabre\DAV\Exception\NotFound;
use Sabre\DAV\ICollection;
class SystemTagsByIdCollection implements ICollection {
/**
* @var ISystemTagManager
*/
private $tagManager;
/**
* @var IGroupManager
*/
private $groupManager;
/**
* @var IUserSession
*/
private $userSession;
/**
* SystemTagsByIdCollection constructor.
*
* @param ISystemTagManager $tagManager
* @param IUserSession $userSession
* @param IGroupManager $groupManager
*/
public function __construct(
ISystemTagManager $tagManager,
IUserSession $userSession,
IGroupManager $groupManager
) {
$this->tagManager = $tagManager;
$this->userSession = $userSession;
$this->groupManager = $groupManager;
}
/**
* Returns whether the currently logged in user is an administrator
*
* @return bool true if the user is an admin
*/
private function isAdmin() {
$user = $this->userSession->getUser();
if ($user !== null) {
return $this->groupManager->isAdmin($user->getUID());
}
return false;
}
/**
* @param string $name
* @param resource|string $data Initial payload
* @throws Forbidden
*/
public function createFile($name, $data = null) {
throw new Forbidden('Cannot create tags by id');
}
/**
* @param string $name
*/
public function createDirectory($name) {
throw new Forbidden('Permission denied to create collections');
}
/**
* @param string $name
*/
public function getChild($name) {
try {
$tag = $this->tagManager->getTagsByIds([$name]);
$tag = current($tag);
if (!$this->tagManager->canUserSeeTag($tag, $this->userSession->getUser())) {
throw new NotFound('Tag with id ' . $name . ' not found');
}
return $this->makeNode($tag);
} catch (\InvalidArgumentException $e) {
throw new BadRequest('Invalid tag id', 0, $e);
} catch (TagNotFoundException $e) {
throw new NotFound('Tag with id ' . $name . ' not found', 0, $e);
}
}
public function getChildren() {
$visibilityFilter = true;
if ($this->isAdmin()) {
$visibilityFilter = null;
}
$tags = $this->tagManager->getAllTags($visibilityFilter);
return array_map(function ($tag) {
return $this->makeNode($tag);
}, $tags);
}
/**
* @param string $name
*/
public function childExists($name) {
try {
$tag = $this->tagManager->getTagsByIds([$name]);
$tag = current($tag);
if (!$this->tagManager->canUserSeeTag($tag, $this->userSession->getUser())) {
return false;
}
return true;
} catch (\InvalidArgumentException $e) {
throw new BadRequest('Invalid tag id', 0, $e);
} catch (TagNotFoundException $e) {
return false;
}
}
public function delete() {
throw new Forbidden('Permission denied to delete this collection');
}
public function getName() {
return 'systemtags';
}
public function setName($name) {
throw new Forbidden('Permission denied to rename this collection');
}
/**
* Returns the last modification time, as a unix timestamp
*
* @return int
*/
public function getLastModified() {
return null;
}
/**
* Create a sabre node for the given system tag
*
* @param ISystemTag $tag
*
* @return SystemTagNode
*/
private function makeNode(ISystemTag $tag) {
return new SystemTagNode($tag, $this->userSession->getUser(), $this->isAdmin(), $this->tagManager);
}
}
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