458 lines
13 KiB
PHP
458 lines
13 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Bjoern Schiessle, Michael Gapczynski
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* @copyright 2012 Michael Gapczynski <mtgap@owncloud.com>
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* 2014 Bjoern Schiessle <schiessle@owncloud.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library 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
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace OC\Files\Cache;
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use OCP\Share_Backend_Collection;
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/**
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* Metadata cache for shared files
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*
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* don't use this class directly if you need to get metadata, use \OC\Files\Filesystem::getFileInfo instead
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*/
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class Shared_Cache extends Cache {
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private $storage;
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private $files = array();
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/**
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* @param \OC\Files\Storage\Shared $storage
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*/
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public function __construct($storage) {
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$this->storage = $storage;
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}
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/**
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* @brief Get the source cache of a shared file or folder
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* @param string $target Shared target file path
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* @return \OC\Files\Cache\Cache
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*/
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private function getSourceCache($target) {
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if ($target === false || $target === $this->storage->getMountPoint()) {
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$target = '';
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}
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$source = \OC_Share_Backend_File::getSource($target, $this->storage->getMountPoint(), $this->storage->getItemType());
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if (isset($source['path']) && isset($source['fileOwner'])) {
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\OC\Files\Filesystem::initMountPoints($source['fileOwner']);
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$mounts = \OC\Files\Filesystem::getMountByNumericId($source['storage']);
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if (is_array($mounts) and count($mounts)) {
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$fullPath = $mounts[0]->getMountPoint() . $source['path'];
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list($storage, $internalPath) = \OC\Files\Filesystem::resolvePath($fullPath);
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if ($storage) {
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$this->files[$target] = $internalPath;
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$cache = $storage->getCache();
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$this->storageId = $storage->getId();
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$this->numericId = $cache->getNumericStorageId();
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return $cache;
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}
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}
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}
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return false;
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}
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public function getNumericStorageId() {
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if (isset($this->numericId)) {
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return $this->numericId;
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} else {
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return false;
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}
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}
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/**
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* get the stored metadata of a file or folder
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*
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* @param string /int $file
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* @return array
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*/
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public function get($file) {
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if (is_string($file)) {
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if ($cache = $this->getSourceCache($file)) {
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$path = 'files' . $this->storage->getMountPoint();
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$path .= ($file !== '') ? '/' . $file : '';
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$data = $cache->get($this->files[$file]);
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$data['displayname_owner'] = \OC_User::getDisplayName($this->storage->getSharedFrom());
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$data['path'] = $path;
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return $data;
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}
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} else {
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// if we are at the root of the mount point we want to return the
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// cache information for the source item
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if (!is_int($file) || $file === 0) {
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$file = $this->storage->getSourceId();
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$mountPoint = $this->storage->getMountPoint();
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}
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$query = \OC_DB::prepare(
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'SELECT `fileid`, `storage`, `path`, `parent`, `name`, `mimetype`, `mimepart`,'
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. ' `size`, `mtime`, `encrypted`, `unencrypted_size`, `storage_mtime`, `etag`'
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. ' FROM `*PREFIX*filecache` WHERE `fileid` = ?');
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$result = $query->execute(array($file));
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$data = $result->fetchRow();
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$data['fileid'] = (int)$data['fileid'];
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$data['mtime'] = (int)$data['mtime'];
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$data['storage_mtime'] = (int)$data['storage_mtime'];
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$data['encrypted'] = (bool)$data['encrypted'];
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$data['mimetype'] = $this->getMimetype($data['mimetype']);
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$data['mimepart'] = $this->getMimetype($data['mimepart']);
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if ($data['storage_mtime'] === 0) {
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$data['storage_mtime'] = $data['mtime'];
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}
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if ($data['encrypted'] or ($data['unencrypted_size'] > 0 and $data['mimetype'] === 'httpd/unix-directory')) {
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$data['encrypted_size'] = (int)$data['size'];
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$data['size'] = (int)$data['unencrypted_size'];
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} else {
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$data['size'] = (int)$data['size'];
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}
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if (isset($mountPoint)) {
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$data['path'] = 'files/' . $mountPoint;
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}
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return $data;
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}
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return false;
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}
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/**
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* get the metadata of all files stored in $folder
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*
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* @param string $folder
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* @return array
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*/
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public function getFolderContents($folder) {
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if ($folder === false) {
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$folder = '';
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}
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$dir = ($folder !== '') ? $folder . '/' : '';
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$cache = $this->getSourceCache($folder);
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if ($cache) {
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$parent = $this->storage->getFile($folder);
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$sourceFolderContent = $cache->getFolderContents($this->files[$folder]);
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foreach ($sourceFolderContent as $key => $c) {
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$sourceFolderContent[$key]['path'] = $dir . $c['name'];
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$sourceFolderContent[$key]['uid_owner'] = $parent['uid_owner'];
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$sourceFolderContent[$key]['displayname_owner'] = $parent['uid_owner'];
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}
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return $sourceFolderContent;
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}
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return false;
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}
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/**
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* store meta data for a file or folder
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*
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* @param string $file
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* @param array $data
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*
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* @return int file id
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*/
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public function put($file, array $data) {
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$file = ($file === false) ? '' : $file;
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if ($cache = $this->getSourceCache($file)) {
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return $cache->put($this->files[$file], $data);
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}
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return false;
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}
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/**
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* get the file id for a file
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*
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* @param string $file
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* @return int
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*/
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public function getId($file) {
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if ($file === false) {
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return $this->storage->getSourceId();
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}
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$cache = $this->getSourceCache($file);
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if ($cache) {
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return $cache->getId($this->files[$file]);
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}
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return -1;
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}
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/**
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* check if a file is available in the cache
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*
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* @param string $file
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* @return bool
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*/
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public function inCache($file) {
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if ($file == '') {
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return true;
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}
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return parent::inCache($file);
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}
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/**
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* remove a file or folder from the cache
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*
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* @param string $file
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*/
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public function remove($file) {
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$file = ($file === false) ? '' : $file;
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if ($cache = $this->getSourceCache($file)) {
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$cache->remove($this->files[$file]);
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}
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}
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/**
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* Move a file or folder in the cache
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*
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* @param string $source
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* @param string $target
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*/
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public function move($source, $target) {
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if ($cache = $this->getSourceCache($source)) {
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$file = \OC_Share_Backend_File::getSource($target, $this->storage->getMountPoint(), $this->storage->getItemType());
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if ($file && isset($file['path'])) {
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$cache->move($this->files[$source], $file['path']);
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}
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}
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}
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/**
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* remove all entries for files that are stored on the storage from the cache
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*/
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public function clear() {
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// Not a valid action for Shared Cache
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}
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/**
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* @param string $file
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*
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* @return int, Cache::NOT_FOUND, Cache::PARTIAL, Cache::SHALLOW or Cache::COMPLETE
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*/
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public function getStatus($file) {
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if ($file == '') {
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return self::COMPLETE;
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}
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if ($cache = $this->getSourceCache($file)) {
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return $cache->getStatus($this->files[$file]);
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}
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return self::NOT_FOUND;
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}
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/**
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* search for files matching $pattern
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*
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* @param string $pattern
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* @return array of file data
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*/
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public function search($pattern) {
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$where = '`name` LIKE ? AND ';
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// normalize pattern
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$value = $this->normalize($pattern);
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return $this->searchWithWhere($where, $value);
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}
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/**
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* search for files by mimetype
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*
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* @param string $mimetype
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* @return array
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*/
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public function searchByMime($mimetype) {
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$mimepart = null;
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if (strpos($mimetype, '/') === false) {
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$mimepart = $mimetype;
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$mimetype = null;
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}
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// note: searchWithWhere is currently broken as it doesn't
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// recurse into subdirs nor returns the correct
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// file paths, so using getFolderContents() for now
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$result = array();
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$exploreDirs = array('');
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while (count($exploreDirs) > 0) {
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$dir = array_pop($exploreDirs);
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$files = $this->getFolderContents($dir);
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// no results?
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if (!$files) {
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continue;
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}
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foreach ($files as $file) {
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if ($file['mimetype'] === 'httpd/unix-directory') {
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$exploreDirs[] = ltrim($dir . '/' . $file['name'], '/');
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} else if (($mimepart && $file['mimepart'] === $mimepart) || ($mimetype && $file['mimetype'] === $mimetype)) {
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$result[] = $file;
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}
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}
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}
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return $result;
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}
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/**
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* The maximum number of placeholders that can be used in an SQL query.
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* Value MUST be <= 1000 for oracle:
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* see ORA-01795 maximum number of expressions in a list is 1000
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* FIXME we should get this from doctrine as other DBs allow a lot more placeholders
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*/
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const MAX_SQL_CHUNK_SIZE = 1000;
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/**
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* search for files with a custom where clause and value
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* the $wherevalue will be array_merge()d with the file id chunks
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*
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* @param string $sqlwhere
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* @param string $wherevalue
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* @return array
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*/
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private function searchWithWhere($sqlwhere, $wherevalue, $chunksize = self::MAX_SQL_CHUNK_SIZE) {
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$ids = $this->getAll();
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$files = array();
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// divide into chunks
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$chunks = array_chunk($ids, $chunksize);
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foreach ($chunks as $chunk) {
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$placeholders = join(',', array_fill(0, count($chunk), '?'));
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$sql = 'SELECT `fileid`, `storage`, `path`, `parent`, `name`, `mimetype`, `mimepart`, `size`, `mtime`,
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`encrypted`, `unencrypted_size`, `etag`
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FROM `*PREFIX*filecache` WHERE ' . $sqlwhere . ' `fileid` IN (' . $placeholders . ')';
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$stmt = \OC_DB::prepare($sql);
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$result = $stmt->execute(array_merge(array($wherevalue), $chunk));
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while ($row = $result->fetchRow()) {
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if (substr($row['path'], 0, 6) === 'files/') {
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$row['path'] = substr($row['path'], 6); // remove 'files/' from path as it's relative to '/Shared'
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}
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$row['mimetype'] = $this->getMimetype($row['mimetype']);
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$row['mimepart'] = $this->getMimetype($row['mimepart']);
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if ($row['encrypted'] or ($row['unencrypted_size'] > 0 and $row['mimetype'] === 'httpd/unix-directory')) {
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$row['encrypted_size'] = $row['size'];
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$row['size'] = $row['unencrypted_size'];
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}
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$files[] = $row;
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}
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}
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return $files;
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}
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/**
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* get the size of a folder and set it in the cache
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*
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* @param string $path
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* @param array $entry (optional) meta data of the folder
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* @return int
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*/
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public function calculateFolderSize($path, $entry = null) {
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$path = ($path === false) ? '' : $path;
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if ($cache = $this->getSourceCache($path)) {
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return $cache->calculateFolderSize($this->files[$path]);
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}
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return 0;
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}
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/**
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* get all file ids on the files on the storage
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*
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* @return int[]
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*/
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public function getAll() {
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$ids = \OCP\Share::getItemsSharedWith('file', \OC_Share_Backend_File::FORMAT_GET_ALL);
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$folderBackend = \OCP\Share::getBackend('folder');
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if ($folderBackend instanceof Share_Backend_Collection) {
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foreach ($ids as $file) {
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/** @var $folderBackend Share_Backend_Collection */
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$children = $folderBackend->getChildren($file);
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foreach ($children as $child) {
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$ids[] = (int)$child['source'];
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}
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}
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}
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return $ids;
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}
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/**
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* find a folder in the cache which has not been fully scanned
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*
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* If multiply incomplete folders are in the cache, the one with the highest id will be returned,
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* use the one with the highest id gives the best result with the background scanner, since that is most
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* likely the folder where we stopped scanning previously
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*
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* @return boolean the path of the folder or false when no folder matched
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*/
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public function getIncomplete() {
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return false;
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}
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/**
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* get the path of a file on this storage relative to the mount point by it's id
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*
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* @param int $id
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* @param string $pathEnd (optional) used internally for recursive calls
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* @return string | null
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*/
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public function getPathById($id, $pathEnd = '') {
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// direct shares are easy
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$path = $this->getShareById($id);
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if (is_string($path)) {
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return ltrim($pathEnd, '/');
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} else {
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// if the item is a direct share we try and get the path of the parent and append the name of the item to it
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list($parent, $name) = $this->getParentInfo($id);
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if ($parent > 0) {
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return $this->getPathById($parent, '/' . $name . $pathEnd);
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} else {
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return null;
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}
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}
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}
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private function getShareById($id) {
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$item = \OCP\Share::getItemSharedWithBySource('file', $id);
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if ($item) {
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return trim($item['file_target'], '/');
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}
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$item = \OCP\Share::getItemSharedWithBySource('folder', $id);
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if ($item) {
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return trim($item['file_target'], '/');
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}
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return null;
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}
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private function getParentInfo($id) {
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$sql = 'SELECT `parent`, `name` FROM `*PREFIX*filecache` WHERE `fileid` = ?';
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$query = \OC_DB::prepare($sql);
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$result = $query->execute(array($id));
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if ($row = $result->fetchRow()) {
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return array($row['parent'], $row['name']);
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} else {
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return array(-1, '');
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}
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}
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}
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