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<?php
/**
* SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OC\Files\ObjectStore;
use OC\Files\Cache\Scanner;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\Files\FileInfo;
class ObjectStoreScanner extends Scanner {
public function scanFile($file, $reuseExisting = 0, $parentId = -1, $cacheData = null, $lock = true, $data = null) {
return [];
}
public function scan($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $lock = true) {
return [];
}
protected function scanChildren(string $path, $recursive, int $reuse, int $folderId, bool $lock, int|float $oldSize, &$etagChanged = false) {
return 0;
}
public function backgroundScan() {
$lastPath = null;
// find any path marked as unscanned and run the scanner until no more paths are unscanned (or we get stuck)
// we sort by path DESC to ensure that contents of a folder are handled before the parent folder
while (($path = $this->getIncomplete()) !== false && $path !== $lastPath) {
$this->runBackgroundScanJob(function () use ($path) {
$item = $this->cache->get($path);
if ($item && $item->getMimeType() !== FileInfo::MIMETYPE_FOLDER) {
$fh = $this->storage->fopen($path, 'r');
if ($fh) {
$stat = fstat($fh);
if ($stat['size']) {
$this->cache->update($item->getId(), ['size' => $stat['size']]);
}
}
}
}, $path);
// FIXME: this won't proceed with the next item, needs revamping of getIncomplete()
// to make this possible
$lastPath = $path;
}
}
/**
* Unlike the default Cache::getIncomplete this one sorts by path.
*
* This is needed since self::backgroundScan doesn't fix child entries when running on a parent folder.
* By sorting by path we ensure that we encounter the child entries first.
*
* @return false|string
* @throws \OCP\DB\Exception
*/
private function getIncomplete() {
$query = $this->connection->getQueryBuilder();
$query->select('path')
->from('filecache')
->where($query->expr()->eq('storage', $query->createNamedParameter($this->cache->getNumericStorageId(), IQueryBuilder::PARAM_INT)))
->andWhere($query->expr()->lt('size', $query->createNamedParameter(0, IQueryBuilder::PARAM_INT)))
->orderBy('path', 'DESC')
->setMaxResults(1);
$result = $query->executeQuery();
$path = $result->fetchOne();
$result->closeCursor();
if ($path === false) {
return false;
}
// Make sure Oracle does not continue with null for empty strings
return (string)$path;
}
}
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