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9735b5d61f
Currently you need to use `opendir` and then call `getMetadata` for every file, which adds overhead because most storage backends already get the metadata when doing the `opendir`. While storagebackends can (and do) use caching to relief this problem, this adds cache invalidation dificulties and only a limited number of items are generally cached (to prevent memory usage exploding when scanning large storages) With this new methods storage backends can use the child metadata they got from listing the folder to return metadata without having to keep seperate caches. Signed-off-by: Robin Appelman <robin@icewind.nl>
83 lines
2.4 KiB
PHP
83 lines
2.4 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 Joas Schilling <coding@schilljs.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Vincent Petry <pvince81@owncloud.com>
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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 OCA\Files_Sharing;
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use OC\Files\ObjectStore\NoopScanner;
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/**
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* Scanner for SharedStorage
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*/
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class Scanner extends \OC\Files\Cache\Scanner {
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/**
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* @var \OCA\Files_Sharing\SharedStorage $storage
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*/
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protected $storage;
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private $sourceScanner;
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/**
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* Returns metadata from the shared storage, but
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* with permissions from the source storage.
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*
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* @param string $path path of the file for which to retrieve metadata
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*
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* @return array an array of metadata of the file
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*/
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public function getData($path) {
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$data = parent::getData($path);
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if ($data === null) {
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return null;
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}
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$internalPath = $this->storage->getUnjailedPath($path);
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$data['permissions'] = $this->storage->getSourceStorage()->getPermissions($internalPath);
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return $data;
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}
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private function getSourceScanner() {
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if ($this->sourceScanner) {
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return $this->sourceScanner;
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}
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if ($this->storage->instanceOfStorage('\OCA\Files_Sharing\SharedStorage')) {
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/** @var \OC\Files\Storage\Storage $storage */
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list($storage) = $this->storage->resolvePath('');
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$this->sourceScanner = $storage->getScanner();
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return $this->sourceScanner;
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} else {
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return null;
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}
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}
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public function scanFile($file, $reuseExisting = 0, $parentId = -1, $cacheData = null, $lock = true, $data = null) {
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$sourceScanner = $this->getSourceScanner();
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if ($sourceScanner instanceof NoopScanner) {
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return [];
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} else {
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return parent::scanFile($file, $reuseExisting, $parentId, $cacheData, $lock);
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}
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}
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}
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