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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Olivier Paroz <github@oparoz.com>
* @author Robin Appelman <robin@icewind.nl>
* @author Vincent Petry <vincent@nextcloud.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_Sharing\External;
use OC\ForbiddenException;
use OCP\Files\NotFoundException;
use OCP\Files\StorageInvalidException;
use OCP\Files\StorageNotAvailableException;
use OCP\Http\Client\LocalServerException;
use Psr\Log\LoggerInterface;
class Scanner extends \OC\Files\Cache\Scanner {
/** @var \OCA\Files_Sharing\External\Storage */
protected $storage;
/** {@inheritDoc} */
public function scan($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $lock = true) {
try {
if (!$this->storage->remoteIsOwnCloud()) {
return parent::scan($path, $recursive, $reuse, $lock);
}
} catch (LocalServerException $e) {
// Scanner doesn't have dependency injection
\OC::$server->get(LoggerInterface::class)
->warning('Trying to scan files inside invalid external storage: ' . $this->storage->getRemote() . ' for mountpoint ' . $this->storage->getMountPoint() . ' and id ' . $this->storage->getId());
return;
}
$this->scanAll();
}
/**
* Scan a single file and store it in the cache.
* If an exception happened while accessing the external storage,
* the storage will be checked for availability and removed
* if it is not available any more.
*
* @param string $file file to scan
* @param int $reuseExisting
* @param int $parentId
* @param array | null $cacheData existing data in the cache for the file to be scanned
* @param bool $lock set to false to disable getting an additional read lock during scanning
* @return array | null an array of metadata of the scanned file
*/
public function scanFile($file, $reuseExisting = 0, $parentId = -1, $cacheData = null, $lock = true, $data = null) {
try {
return parent::scanFile($file, $reuseExisting);
} catch (ForbiddenException $e) {
$this->storage->checkStorageAvailability();
} catch (NotFoundException $e) {
// if the storage isn't found, the call to
// checkStorageAvailable() will verify it and remove it
// if appropriate
$this->storage->checkStorageAvailability();
} catch (StorageInvalidException $e) {
$this->storage->checkStorageAvailability();
} catch (StorageNotAvailableException $e) {
$this->storage->checkStorageAvailability();
}
}
/**
* Checks the remote share for changes.
* If changes are available, scan them and update
* the cache.
* @throws NotFoundException
* @throws StorageInvalidException
* @throws \Exception
*/
public function scanAll() {
try {
$data = $this->storage->getShareInfo();
} catch (\Exception $e) {
$this->storage->checkStorageAvailability();
throw new \Exception(
'Error while scanning remote share: "' .
$this->storage->getRemote() . '" ' .
$e->getMessage()
);
}
if ($data['status'] === 'success') {
$this->addResult($data['data'], '');
} else {
throw new \Exception(
'Error while scanning remote share: "' .
$this->storage->getRemote() . '"'
);
}
}
/**
* @param array $data
* @param string $path
*/
private function addResult($data, $path) {
$id = $this->cache->put($path, $data);
if (isset($data['children'])) {
$children = [];
foreach ($data['children'] as $child) {
$children[$child['name']] = true;
$this->addResult($child, ltrim($path . '/' . $child['name'], '/'));
}
$existingCache = $this->cache->getFolderContentsById($id);
foreach ($existingCache as $existingChild) {
// if an existing child is not in the new data, remove it
if (!isset($children[$existingChild['name']])) {
$this->cache->remove(ltrim($path . '/' . $existingChild['name'], '/'));
}
}
}
}
}
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