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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\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
use OCP\IUserManager;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;
/**
* Class RepairConfig
*
* @package OC\Repair
*/
class CleanTags implements IRepairStep {
protected $deletedTags = 0;
/**
* @param IDBConnection $connection
* @param IUserManager $userManager
*/
public function __construct(
protected IDBConnection $connection,
protected IUserManager $userManager,
) {
}
/**
* @return string
*/
public function getName() {
return 'Clean tags and favorites';
}
/**
* Updates the configuration after running an update
*/
public function run(IOutput $output) {
$this->deleteOrphanTags($output);
$this->deleteOrphanFileEntries($output);
$this->deleteOrphanTagEntries($output);
$this->deleteOrphanCategoryEntries($output);
}
/**
* Delete tags for deleted users
*/
protected function deleteOrphanTags(IOutput $output) {
$offset = 0;
while ($this->checkTags($offset)) {
$offset += 50;
}
$output->info(sprintf('%d tags of deleted users have been removed.', $this->deletedTags));
}
protected function checkTags($offset) {
$query = $this->connection->getQueryBuilder();
$query->select('uid')
->from('vcategory')
->groupBy('uid')
->orderBy('uid')
->setMaxResults(50)
->setFirstResult($offset);
$result = $query->executeQuery();
$users = [];
$hadResults = false;
while ($row = $result->fetch()) {
$hadResults = true;
if (!$this->userManager->userExists($row['uid'])) {
$users[] = $row['uid'];
}
}
$result->closeCursor();
if (!$hadResults) {
// No more tags, stop looping
return false;
}
if (!empty($users)) {
$query = $this->connection->getQueryBuilder();
$query->delete('vcategory')
->where($query->expr()->in('uid', $query->createNamedParameter($users, IQueryBuilder::PARAM_STR_ARRAY)));
$this->deletedTags += $query->executeStatement();
}
return true;
}
/**
* Delete tag entries for deleted files
*/
protected function deleteOrphanFileEntries(IOutput $output) {
$this->deleteOrphanEntries(
$output,
'%d tags for delete files have been removed.',
'vcategory_to_object', 'objid',
'filecache', 'fileid', 'fileid'
);
}
/**
* Delete tag entries for deleted tags
*/
protected function deleteOrphanTagEntries(IOutput $output) {
$this->deleteOrphanEntries(
$output,
'%d tag entries for deleted tags have been removed.',
'vcategory_to_object', 'categoryid',
'vcategory', 'id', 'uid'
);
}
/**
* Delete tags that have no entries
*/
protected function deleteOrphanCategoryEntries(IOutput $output) {
$this->deleteOrphanEntries(
$output,
'%d tags with no entries have been removed.',
'vcategory', 'id',
'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(IOutput $output, $repairInfo, $deleteTable, $deleteId, $sourceTable, $sourceId, $sourceNullColumn) {
$qb = $this->connection->getQueryBuilder();
$qb->select('d.' . $deleteId)
->from($deleteTable, 'd')
->leftJoin('d', $sourceTable, 's', $qb->expr()->eq('d.' . $deleteId, 's.' . $sourceId))
->where(
$qb->expr()->eq('d.type', $qb->expr()->literal('files'))
)
->andWhere(
$qb->expr()->isNull('s.' . $sourceNullColumn)
);
$result = $qb->executeQuery();
$orphanItems = [];
while ($row = $result->fetch()) {
$orphanItems[] = (int)$row[$deleteId];
}
$deleteQuery = $this->connection->getQueryBuilder();
$deleteQuery->delete($deleteTable)
->where(
$deleteQuery->expr()->eq('type', $deleteQuery->expr()->literal('files'))
)
->andWhere($deleteQuery->expr()->in($deleteId, $deleteQuery->createParameter('ids')));
if (!empty($orphanItems)) {
$orphanItemsBatch = array_chunk($orphanItems, 200);
foreach ($orphanItemsBatch as $items) {
$deleteQuery->setParameter('ids', $items, IQueryBuilder::PARAM_INT_ARRAY);
$deleteQuery->executeStatement();
}
}
if ($repairInfo) {
$output->info(sprintf($repairInfo, count($orphanItems)));
}
}
}
|
