Mirror von
https://github.com/nextcloud/server.git
synchronisiert 2024-08-18 02:10:32 +02:00
175 Zeilen
4.1 KiB
PHP
175 Zeilen
4.1 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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*
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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 OC\Files\Type;
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use OCP\Files\IMimeTypeLoader;
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use OCP\IDBConnection;
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use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
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/**
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* Mimetype database loader
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*
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* @package OC\Files\Type
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*/
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class Loader implements IMimeTypeLoader {
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/** @var IDBConnection */
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private $dbConnection;
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/** @var array [id => mimetype] */
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protected $mimetypes;
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/** @var array [mimetype => id] */
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protected $mimetypeIds;
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/**
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* @param IDBConnection $dbConnection
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*/
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public function __construct(IDBConnection $dbConnection) {
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$this->dbConnection = $dbConnection;
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$this->mimetypes = [];
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$this->mimetypeIds = [];
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}
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/**
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* Get a mimetype from its ID
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*
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* @param int $id
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* @return string|null
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*/
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public function getMimetypeById($id) {
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if (!$this->mimetypes) {
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$this->loadMimetypes();
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}
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if (isset($this->mimetypes[$id])) {
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return $this->mimetypes[$id];
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}
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return null;
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}
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/**
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* Get a mimetype ID, adding the mimetype to the DB if it does not exist
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*
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* @param string $mimetype
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* @return int
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*/
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public function getId($mimetype) {
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if (!$this->mimetypeIds) {
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$this->loadMimetypes();
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}
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if (isset($this->mimetypeIds[$mimetype])) {
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return $this->mimetypeIds[$mimetype];
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}
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return $this->store($mimetype);
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}
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/**
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* Test if a mimetype exists in the database
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*
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* @param string $mimetype
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* @return bool
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*/
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public function exists($mimetype) {
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if (!$this->mimetypeIds) {
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$this->loadMimetypes();
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}
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return isset($this->mimetypeIds[$mimetype]);
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}
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/**
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* Clear all loaded mimetypes, allow for re-loading
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*/
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public function reset() {
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$this->mimetypes = [];
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$this->mimetypeIds = [];
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}
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/**
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* Store a mimetype in the DB
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*
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* @param string $mimetype
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* @param int inserted ID
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*/
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protected function store($mimetype) {
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try {
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$qb = $this->dbConnection->getQueryBuilder();
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$qb->insert('mimetypes')
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->values([
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'mimetype' => $qb->createNamedParameter($mimetype)
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]);
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$qb->execute();
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} catch (UniqueConstraintViolationException $e) {
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// something inserted it before us
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}
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$fetch = $this->dbConnection->getQueryBuilder();
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$fetch->select('id')
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->from('mimetypes')
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->where(
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$fetch->expr()->eq('mimetype', $fetch->createNamedParameter($mimetype)
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));
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$row = $fetch->execute()->fetch();
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$this->mimetypes[$row['id']] = $mimetype;
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$this->mimetypeIds[$mimetype] = $row['id'];
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return $row['id'];
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}
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/**
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* Load all mimetypes from DB
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*/
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private function loadMimetypes() {
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$qb = $this->dbConnection->getQueryBuilder();
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$qb->select('id', 'mimetype')
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->from('mimetypes');
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$results = $qb->execute()->fetchAll();
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foreach ($results as $row) {
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$this->mimetypes[$row['id']] = $row['mimetype'];
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$this->mimetypeIds[$row['mimetype']] = $row['id'];
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}
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}
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/**
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* Update filecache mimetype based on file extension
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*
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* @param string $ext file extension
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* @param int $mimetypeId
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* @return int number of changed rows
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*/
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public function updateFilecache($ext, $mimetypeId) {
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$update = $this->dbConnection->getQueryBuilder();
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$update->update('filecache')
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->set('mimetype', $update->createNamedParameter($mimetypeId))
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->where($update->expr()->neq(
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'mimetype', $update->createNamedParameter($mimetypeId)
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))
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->andWhere($update->expr()->like(
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$update->createFunction('LOWER(`name`)'), $update->createNamedParameter($ext)
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));
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return $update->execute();
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}
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}
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