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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OC\Repair;
use OCP\IConfig;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;
/**
* Repairs shares with invalid data
*/
class RepairInvalidShares implements IRepairStep {
public const CHUNK_SIZE = 200;
public function __construct(
protected IConfig $config,
protected IDBConnection $connection,
) {
}
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 = $builder->executeStatement();
if ($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 = $query->executeQuery();
while ($row = $result->fetch()) {
$deletedInLastChunk++;
$deletedEntries += $deleteQuery->setParameter('parent', (int)$row['parent'])
->executeStatement();
}
$result->closeCursor();
}
if ($deletedEntries) {
$out->info('Removed ' . $deletedEntries . ' shares where the parent did not exist');
}
}
public function run(IOutput $out) {
$ocVersionFromBeforeUpdate = $this->config->getSystemValueString('version', '0.0.0');
if (version_compare($ocVersionFromBeforeUpdate, '12.0.0.11', '<')) {
$this->adjustFileSharePermissions($out);
}
$this->removeSharesNonExistingParent($out);
}
}
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