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<?php
/**
* Copyright (c) 2015 Joas Schilling <nickvergessen@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\Repair;
use OC\DB\Connection;
use OC\Hooks\BasicEmitter;
use OC\RepairStep;
/**
* Class RepairConfig
*
* @package OC\Repair
*/
class CleanTags extends BasicEmitter implements RepairStep {
/** @var Connection */
protected $connection;
/**
* @param Connection $connection
*/
public function __construct(Connection $connection) {
$this->connection = $connection;
}
/**
* @return string
*/
public function getName() {
return 'Clean tags and favorites';
}
/**
* Updates the configuration after running an update
*/
public function run() {
// Delete tag entries for deleted files
$this->deleteOrphanEntries(
'%d tags for delete files have been removed.',
'*PREFIX*vcategory_to_object', 'objid',
'*PREFIX*filecache', 'fileid', 'fileid'
);
// Delete tag entries for deleted tags
$this->deleteOrphanEntries(
'%d tag entries for deleted tags have been removed.',
'*PREFIX*vcategory_to_object', 'categoryid',
'*PREFIX*vcategory', 'id', 'uid'
);
// Delete tags that have no entries
$this->deleteOrphanEntries(
'%d tags with no entries have been removed.',
'*PREFIX*vcategory', 'id',
'*PREFIX*vcategory_to_object', 'categoryid', 'type'
);
}
/**
* Deletes all entries from $deleteTable that do not have a matching entry in $sourceTable
*
* A query joins $deleteTable.$deleteId = $sourceTable.$sourceId and checks
* whether $sourceNullColumn is null. If it is null, the entry in $deleteTable
* is being deleted.
*
* @param string $repairInfo
* @param string $deleteTable
* @param string $deleteId
* @param string $sourceTable
* @param string $sourceId
* @param string $sourceNullColumn If this column is null in the source table,
* the entry is deleted in the $deleteTable
*/
protected function deleteOrphanEntries($repairInfo, $deleteTable, $deleteId, $sourceTable, $sourceId, $sourceNullColumn) {
$qb = $this->connection->createQueryBuilder();
$qb->select('d.' . $deleteId)
->from($deleteTable, 'd')
->leftJoin('d', $sourceTable, 's', 'd.' . $deleteId . ' = s.' . $sourceId)
->where(
'd.type = ' . $qb->expr()->literal('files')
)
->andWhere(
$qb->expr()->isNull('s.' . $sourceNullColumn)
);
$result = $qb->execute();
$orphanItems = array();
while ($row = $result->fetch()) {
$orphanItems[] = (int) $row[$deleteId];
}
if (!empty($orphanItems)) {
$orphanItemsBatch = array_chunk($orphanItems, 200);
foreach ($orphanItemsBatch as $items) {
$qb->delete($deleteTable)
->where($qb->expr()->in($deleteId, ':ids'));
$qb->setParameter('ids', $items, \Doctrine\DBAL\Connection::PARAM_INT_ARRAY);
$qb->execute();
}
}
if ($repairInfo) {
$this->emit('\OC\Repair', 'info', array(sprintf($repairInfo, sizeof($orphanItems))));
}
}
}
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