102 lines
3.2 KiB
PHP
102 lines
3.2 KiB
PHP
<?php
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/**
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* @author Robin Appelman <icewind@owncloud.com>
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*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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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 OC\Files\Cache;
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use OCP\DB\QueryBuilder\IQueryBuilder;
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use OCP\Files\Cache\IPropagator;
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use OCP\IDBConnection;
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/**
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* Propagate etags and mtimes within the storage
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*/
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class Propagator implements IPropagator {
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/**
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* @var \OC\Files\Storage\Storage
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*/
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protected $storage;
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/**
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* @var IDBConnection
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*/
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private $connection;
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/**
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* @param \OC\Files\Storage\Storage $storage
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* @param IDBConnection $connection
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*/
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public function __construct(\OC\Files\Storage\Storage $storage, IDBConnection $connection) {
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$this->storage = $storage;
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$this->connection = $connection;
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}
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/**
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* @param string $internalPath
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* @param int $time
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* @param int $sizeDifference number of bytes the file has grown
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*/
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public function propagateChange($internalPath, $time, $sizeDifference = 0) {
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$storageId = (int)$this->storage->getStorageCache()->getNumericId();
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$parents = $this->getParents($internalPath);
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$parentHashes = array_map('md5', $parents);
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$etag = uniqid(); // since we give all folders the same etag we don't ask the storage for the etag
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$builder = $this->connection->getQueryBuilder();
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$hashParams = array_map(function ($hash) use ($builder) {
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return $builder->expr()->literal($hash);
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}, $parentHashes);
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$builder->update('filecache')
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->set('mtime', $builder->createFunction('GREATEST(`mtime`, ' . $builder->createNamedParameter($time) . ')'))
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->set('etag', $builder->createNamedParameter($etag, IQueryBuilder::PARAM_STR))
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->where($builder->expr()->eq('storage', $builder->createNamedParameter($storageId, IQueryBuilder::PARAM_INT)))
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->andWhere($builder->expr()->in('path_hash', $hashParams));
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$builder->execute();
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if ($sizeDifference !== 0) {
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// we need to do size separably so we can ignore entries with uncalculated size
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$builder = $this->connection->getQueryBuilder();
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$builder->update('filecache')
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->set('size', $builder->createFunction('`size` + ' . $builder->createNamedParameter($sizeDifference)))
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->where($builder->expr()->eq('storage', $builder->createNamedParameter($storageId, IQueryBuilder::PARAM_INT)))
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->andWhere($builder->expr()->in('path_hash', $hashParams))
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->andWhere($builder->expr()->gt('size', $builder->expr()->literal(-1, IQueryBuilder::PARAM_INT)));
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}
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$builder->execute();
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}
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protected function getParents($path) {
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$parts = explode('/', $path);
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$parent = '';
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$parents = [];
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foreach ($parts as $part) {
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$parents[] = $parent;
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$parent = trim($parent . '/' . $part, '/');
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}
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return $parents;
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}
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}
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