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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Christopher Schäpers <kondou@ts.unde.re>
* @author Joas Schilling <coding@schilljs.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Michael Gapczynski <GapczynskiM@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @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_Sharing;
use OC\Files\Cache\FailedCache;
use OC\Files\Cache\Wrapper\CacheJail;
use OC\Files\Search\SearchBinaryOperator;
use OC\Files\Search\SearchComparison;
use OC\Files\Storage\Wrapper\Jail;
use OC\User\DisplayNameCache;
use OCP\Files\Cache\ICacheEntry;
use OCP\Files\Search\ISearchBinaryOperator;
use OCP\Files\Search\ISearchComparison;
use OCP\Files\Search\ISearchOperator;
use OCP\Files\StorageNotAvailableException;
use OCP\ICacheFactory;
use OCP\IUserManager;
/**
* Metadata cache for shared files
*
* don't use this class directly if you need to get metadata, use \OC\Files\Filesystem::getFileInfo instead
*/
class Cache extends CacheJail {
/** @var SharedStorage */
private $storage;
private ICacheEntry $sourceRootInfo;
private bool $rootUnchanged = true;
private ?string $ownerDisplayName = null;
private $numericId;
private DisplayNameCache $displayNameCache;
/**
* @param SharedStorage $storage
*/
public function __construct($storage, ICacheEntry $sourceRootInfo, DisplayNameCache $displayNameCache) {
$this->storage = $storage;
$this->sourceRootInfo = $sourceRootInfo;
$this->numericId = $sourceRootInfo->getStorageId();
$this->displayNameCache = $displayNameCache;
parent::__construct(
null,
''
);
}
protected function getRoot() {
if ($this->root === '') {
$absoluteRoot = $this->sourceRootInfo->getPath();
// the sourceRootInfo path is the absolute path of the folder in the "real" storage
// in the case where a folder is shared from a Jail we need to ensure that the share Jail
// has its root set relative to the source Jail
$currentStorage = $this->storage->getSourceStorage();
if ($currentStorage->instanceOfStorage(Jail::class)) {
/** @var Jail $currentStorage */
$absoluteRoot = $currentStorage->getJailedPath($absoluteRoot);
}
$this->root = $absoluteRoot;
}
return $this->root;
}
protected function getGetUnjailedRoot() {
return $this->sourceRootInfo->getPath();
}
public function getCache() {
if (is_null($this->cache)) {
$sourceStorage = $this->storage->getSourceStorage();
if ($sourceStorage) {
$this->cache = $sourceStorage->getCache();
} else {
// don't set $this->cache here since sourceStorage will be set later
return new FailedCache();
}
}
return $this->cache;
}
public function getNumericStorageId() {
if (isset($this->numericId)) {
return $this->numericId;
} else {
return false;
}
}
public function get($file) {
if ($this->rootUnchanged && ($file === '' || $file === $this->sourceRootInfo->getId())) {
return $this->formatCacheEntry(clone $this->sourceRootInfo, '');
}
return parent::get($file);
}
public function update($id, array $data) {
$this->rootUnchanged = false;
parent::update($id, $data);
}
public function insert($file, array $data) {
$this->rootUnchanged = false;
return parent::insert($file, $data);
}
public function remove($file) {
$this->rootUnchanged = false;
parent::remove($file);
}
public function moveFromCache(\OCP\Files\Cache\ICache $sourceCache, $sourcePath, $targetPath) {
$this->rootUnchanged = false;
return parent::moveFromCache($sourceCache, $sourcePath, $targetPath);
}
protected function formatCacheEntry($entry, $path = null) {
if (is_null($path)) {
$path = $entry['path'] ?? '';
$entry['path'] = $this->getJailedPath($path);
} else {
$entry['path'] = $path;
}
try {
if (isset($entry['permissions'])) {
$entry['permissions'] &= $this->storage->getShare()->getPermissions();
} else {
$entry['permissions'] = $this->storage->getPermissions($entry['path']);
}
} catch (StorageNotAvailableException $e) {
// thrown by FailedStorage e.g. when the sharer does not exist anymore
// (IDE may say the exception is never thrown – false negative)
$sharePermissions = 0;
}
$entry['uid_owner'] = $this->storage->getOwner('');
$entry['displayname_owner'] = $this->getOwnerDisplayName();
if ($path === '') {
$entry['is_share_mount_point'] = true;
}
return $entry;
}
private function getOwnerDisplayName() {
if (!$this->ownerDisplayName) {
$uid = $this->storage->getOwner('');
$this->ownerDisplayName = $this->displayNameCache->getDisplayName($uid) ?? $uid;
}
return $this->ownerDisplayName;
}
/**
* remove all entries for files that are stored on the storage from the cache
*/
public function clear() {
// Not a valid action for Shared Cache
}
public function getQueryFilterForStorage(): ISearchOperator {
$storageFilter = \OC\Files\Cache\Cache::getQueryFilterForStorage();
// Do the normal jail behavior for non files
if ($this->storage->getItemType() !== 'file') {
return $this->addJailFilterQuery($storageFilter);
}
// for single file shares we don't need to do the LIKE
return new SearchBinaryOperator(
ISearchBinaryOperator::OPERATOR_AND,
[
$storageFilter,
new SearchComparison(ISearchComparison::COMPARE_EQUAL, 'path', $this->getGetUnjailedRoot()),
]
);
}
public function getCacheEntryFromSearchResult(ICacheEntry $rawEntry): ?ICacheEntry {
if ($rawEntry->getStorageId() === $this->getNumericStorageId()) {
return parent::getCacheEntryFromSearchResult($rawEntry);
} else {
return null;
}
}
}
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