117 lines
2.9 KiB
PHP
117 lines
2.9 KiB
PHP
<?php
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/**
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* @author Joas Schilling <nickvergessen@owncloud.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\Files\Service;
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use OC\Files\FileInfo;
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/**
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* Service class to manage tags on files.
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*/
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class TagService {
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/**
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* @var \OCP\IUserSession
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*/
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private $userSession;
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/**
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* @var \OCP\ITags
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*/
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private $tagger;
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/**
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* @var \OCP\Files\Folder
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*/
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private $homeFolder;
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public function __construct(
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\OCP\IUserSession $userSession,
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\OCP\ITags $tagger,
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\OCP\Files\Folder $homeFolder
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) {
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$this->userSession = $userSession;
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$this->tagger = $tagger;
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$this->homeFolder = $homeFolder;
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}
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/**
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* Updates the tags of the specified file path.
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* The passed tags are absolute, which means they will
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* replace the actual tag selection.
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*
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* @param string $path path
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* @param array $tags array of tags
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* @return array list of tags
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* @throws \OCP\Files\NotFoundException if the file does not exist
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*/
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public function updateFileTags($path, $tags) {
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$fileId = $this->homeFolder->get($path)->getId();
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$currentTags = $this->tagger->getTagsForObjects(array($fileId));
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if (!empty($currentTags)) {
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$currentTags = current($currentTags);
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}
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$newTags = array_diff($tags, $currentTags);
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foreach ($newTags as $tag) {
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$this->tagger->tagAs($fileId, $tag);
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}
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$deletedTags = array_diff($currentTags, $tags);
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foreach ($deletedTags as $tag) {
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$this->tagger->unTag($fileId, $tag);
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}
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// TODO: re-read from tagger to make sure the
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// list is up to date, in case of concurrent changes ?
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return $tags;
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}
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/**
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* Get all files for the given tag
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*
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* @param array $tagName tag name to filter by
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* @return FileInfo[] list of matching files
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* @throws \Exception if the tag does not exist
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*/
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public function getFilesByTag($tagName) {
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try {
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$fileIds = $this->tagger->getIdsForTag($tagName);
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} catch (\Exception $e) {
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return [];
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}
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$fileInfos = [];
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foreach ($fileIds as $fileId) {
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$nodes = $this->homeFolder->getById((int) $fileId);
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foreach ($nodes as $node) {
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/** @var \OC\Files\Node\Node $node */
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$fileInfos[] = $node->getFileInfo();
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}
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}
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return $fileInfos;
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}
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}
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