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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @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\Files\Service;
use OC\Tags;
use OCA\Files\Activity\FavoriteProvider;
use OCP\Activity\IManager;
use OCP\Files\Folder;
use OCP\ITags;
use OCP\IUser;
use OCP\IUserSession;
/**
* Service class to manage tags on files.
*/
class TagService {
/** @var IUserSession */
private $userSession;
/** @var IManager */
private $activityManager;
/** @var ITags */
private $tagger;
/** @var Folder */
private $homeFolder;
/**
* @param IUserSession $userSession
* @param IManager $activityManager
* @param ITags $tagger
* @param Folder $homeFolder
*/
public function __construct(
IUserSession $userSession,
IManager $activityManager,
ITags $tagger,
Folder $homeFolder
) {
$this->userSession = $userSession;
$this->activityManager = $activityManager;
$this->tagger = $tagger;
$this->homeFolder = $homeFolder;
}
/**
* Updates the tags of the specified file path.
* The passed tags are absolute, which means they will
* replace the actual tag selection.
*
* @param string $path path
* @param array $tags array of tags
* @return array list of tags
* @throws \OCP\Files\NotFoundException if the file does not exist
*/
public function updateFileTags($path, $tags) {
$fileId = $this->homeFolder->get($path)->getId();
$currentTags = $this->tagger->getTagsForObjects(array($fileId));
if (!empty($currentTags)) {
$currentTags = current($currentTags);
}
$newTags = array_diff($tags, $currentTags);
foreach ($newTags as $tag) {
if ($tag === Tags::TAG_FAVORITE) {
$this->addActivity(true, $fileId, $path);
}
$this->tagger->tagAs($fileId, $tag);
}
$deletedTags = array_diff($currentTags, $tags);
foreach ($deletedTags as $tag) {
if ($tag === Tags::TAG_FAVORITE) {
$this->addActivity(false, $fileId, $path);
}
$this->tagger->unTag($fileId, $tag);
}
// TODO: re-read from tagger to make sure the
// list is up to date, in case of concurrent changes ?
return $tags;
}
/**
* @param bool $addToFavorite
* @param int $fileId
* @param string $path
*/
protected function addActivity($addToFavorite, $fileId, $path) {
$user = $this->userSession->getUser();
if (!$user instanceof IUser) {
return;
}
$event = $this->activityManager->generateEvent();
try {
$event->setApp('files')
->setObject('files', $fileId, $path)
->setType('favorite')
->setAuthor($user->getUID())
->setAffectedUser($user->getUID())
->setTimestamp(time())
->setSubject(
$addToFavorite ? FavoriteProvider::SUBJECT_ADDED : FavoriteProvider::SUBJECT_REMOVED,
['id' => $fileId, 'path' => $path]
);
$this->activityManager->publish($event);
} catch (\InvalidArgumentException $e) {
} catch (\BadMethodCallException $e) {
}
}
}
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