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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Joas Schilling <coding@schilljs.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @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 OC\Repair;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;
/**
* Repairs shares with invalid data
*/
class RepairInvalidShares implements IRepairStep {
public const CHUNK_SIZE = 200;
/** @var \OCP\IConfig */
protected $config;
/** @var \OCP\IDBConnection */
protected $connection;
/**
* @param \OCP\IConfig $config
* @param \OCP\IDBConnection $connection
*/
public function __construct($config, $connection) {
$this->connection = $connection;
$this->config = $config;
}
public function getName() {
return 'Repair invalid shares';
}
/**
* Adjust file share permissions
*/
private function adjustFileSharePermissions(IOutput $out) {
$mask = \OCP\Constants::PERMISSION_READ | \OCP\Constants::PERMISSION_UPDATE | \OCP\Constants::PERMISSION_SHARE;
$builder = $this->connection->getQueryBuilder();
$permsFunc = $builder->expr()->bitwiseAnd('permissions', $mask);
$builder
->update('share')
->set('permissions', $permsFunc)
->where($builder->expr()->eq('item_type', $builder->expr()->literal('file')))
->andWhere($builder->expr()->neq('permissions', $permsFunc));
$updatedEntries = $builder->execute();
if ($updatedEntries > 0) {
$out->info('Fixed file share permissions for ' . $updatedEntries . ' shares');
}
}
/**
* Remove shares where the parent share does not exist anymore
*/
private function removeSharesNonExistingParent(IOutput $out) {
$deletedEntries = 0;
$query = $this->connection->getQueryBuilder();
$query->select('s1.parent')
->from('share', 's1')
->where($query->expr()->isNotNull('s1.parent'))
->andWhere($query->expr()->isNull('s2.id'))
->leftJoin('s1', 'share', 's2', $query->expr()->eq('s1.parent', 's2.id'))
->groupBy('s1.parent')
->setMaxResults(self::CHUNK_SIZE);
$deleteQuery = $this->connection->getQueryBuilder();
$deleteQuery->delete('share')
->where($deleteQuery->expr()->eq('parent', $deleteQuery->createParameter('parent')));
$deletedInLastChunk = self::CHUNK_SIZE;
while ($deletedInLastChunk === self::CHUNK_SIZE) {
$deletedInLastChunk = 0;
$result = $query->execute();
while ($row = $result->fetch()) {
$deletedInLastChunk++;
$deletedEntries += $deleteQuery->setParameter('parent', (int) $row['parent'])
->execute();
}
$result->closeCursor();
}
if ($deletedEntries) {
$out->info('Removed ' . $deletedEntries . ' shares where the parent did not exist');
}
}
public function run(IOutput $out) {
$ocVersionFromBeforeUpdate = $this->config->getSystemValue('version', '0.0.0');
if (version_compare($ocVersionFromBeforeUpdate, '12.0.0.11', '<')) {
$this->adjustFileSharePermissions($out);
}
$this->removeSharesNonExistingParent($out);
}
}
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