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<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @author Joas Schilling <coding@schilljs.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Repair\NC13;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IConfig;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;
class RepairInvalidPaths implements IRepairStep {
const MAX_ROWS = 1000;
/** @var IDBConnection */
private $connection;
/** @var IConfig */
private $config;
private $getIdQuery;
private $updateQuery;
private $reparentQuery;
private $deleteQuery;
public function __construct(IDBConnection $connection, IConfig $config) {
$this->connection = $connection;
$this->config = $config;
}
public function getName() {
return 'Repair invalid paths in file cache';
}
/**
* @return \Generator
* @suppress SqlInjectionChecker
*/
private function getInvalidEntries() {
$builder = $this->connection->getQueryBuilder();
$computedPath = $builder->func()->concat(
'p.path',
$builder->func()->concat($builder->createNamedParameter('/'), 'f.name')
);
//select f.path, f.parent,p.path from oc_filecache f inner join oc_filecache p on f.parent=p.fileid and p.path!='' where f.path != p.path || '/' || f.name;
$builder->select('f.fileid', 'f.path', 'f.name', 'f.parent', 'f.storage')
->selectAlias('p.path', 'parent_path')
->selectAlias('p.storage', 'parent_storage')
->from('filecache', 'f')
->innerJoin('f', 'filecache', 'p', $builder->expr()->andX(
$builder->expr()->eq('f.parent', 'p.fileid'),
$builder->expr()->nonEmptyString('p.name')
))
->where($builder->expr()->neq('f.path', $computedPath))
->setMaxResults(self::MAX_ROWS);
do {
$result = $builder->execute();
$rows = $result->fetchAll();
foreach ($rows as $row) {
yield $row;
}
$result->closeCursor();
} while (count($rows) > 0);
}
private function getId($storage, $path) {
if (!$this->getIdQuery) {
$builder = $this->connection->getQueryBuilder();
$this->getIdQuery = $builder->select('fileid')
->from('filecache')
->where($builder->expr()->eq('storage', $builder->createParameter('storage')))
->andWhere($builder->expr()->eq('path_hash', $builder->createParameter('path_hash')));
}
$this->getIdQuery->setParameter('storage', $storage, IQueryBuilder::PARAM_INT);
$this->getIdQuery->setParameter('path_hash', md5($path));
return $this->getIdQuery->execute()->fetchColumn();
}
/**
* @param string $fileid
* @param string $newPath
* @param string $newStorage
* @suppress SqlInjectionChecker
*/
private function update($fileid, $newPath, $newStorage) {
if (!$this->updateQuery) {
$builder = $this->connection->getQueryBuilder();
$this->updateQuery = $builder->update('filecache')
->set('path', $builder->createParameter('newpath'))
->set('path_hash', $builder->func()->md5($builder->createParameter('newpath')))
->set('storage', $builder->createParameter('newstorage'))
->where($builder->expr()->eq('fileid', $builder->createParameter('fileid')));
}
$this->updateQuery->setParameter('newpath', $newPath);
$this->updateQuery->setParameter('newstorage', $newStorage);
$this->updateQuery->setParameter('fileid', $fileid, IQueryBuilder::PARAM_INT);
$this->updateQuery->execute();
}
private function reparent($from, $to) {
if (!$this->reparentQuery) {
$builder = $this->connection->getQueryBuilder();
$this->reparentQuery = $builder->update('filecache')
->set('parent', $builder->createParameter('to'))
->where($builder->expr()->eq('fileid', $builder->createParameter('from')));
}
$this->reparentQuery->setParameter('from', $from);
$this->reparentQuery->setParameter('to', $to);
$this->reparentQuery->execute();
}
private function delete($fileid) {
if (!$this->deleteQuery) {
$builder = $this->connection->getQueryBuilder();
$this->deleteQuery = $builder->delete('filecache')
->where($builder->expr()->eq('fileid', $builder->createParameter('fileid')));
}
$this->deleteQuery->setParameter('fileid', $fileid, IQueryBuilder::PARAM_INT);
$this->deleteQuery->execute();
}
private function repair() {
$this->connection->beginTransaction();
$entries = $this->getInvalidEntries();
$count = 0;
foreach ($entries as $entry) {
$count++;
$calculatedPath = $entry['parent_path'] . '/' . $entry['name'];
if ($newId = $this->getId($entry['parent_storage'], $calculatedPath)) {
// a new entry with the correct path has already been created, reuse that one and delete the incorrect entry
$this->reparent($entry['fileid'], $newId);
$this->delete($entry['fileid']);
} else {
$this->update($entry['fileid'], $calculatedPath, $entry['parent_storage']);
}
}
$this->connection->commit();
return $count;
}
private function shouldRun() {
$versionFromBeforeUpdate = $this->config->getSystemValue('version', '0.0.0');
// was added to 11.0.5.2, 12.0.0.30 and 13.0.0.1
$shouldRun = version_compare($versionFromBeforeUpdate, '11.0.5.2', '<');
$shouldRun |= version_compare($versionFromBeforeUpdate, '12.0.0.0', '>=') && version_compare($versionFromBeforeUpdate, '12.0.0.30', '<');
$shouldRun |= version_compare($versionFromBeforeUpdate, '13.0.0.0', '==');
return $shouldRun;
}
public function run(IOutput $output) {
if ($this->shouldRun()) {
$count = $this->repair();
$output->info('Repaired ' . $count . ' paths');
}
}
}