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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\DAV\Migration;
use OCA\DAV\CalDAV\CalDavBackend;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;
class RemoveOrphanEventsAndContacts implements IRepairStep {
/** @var IDBConnection */
private $connection;
public function __construct(IDBConnection $connection) {
$this->connection = $connection;
}
/**
* @inheritdoc
*/
public function getName(): string {
return 'Clean up orphan event and contact data';
}
/**
* @inheritdoc
*/
public function run(IOutput $output) {
$orphanItems = $this->removeOrphanChildren('calendarobjects', 'calendars', 'calendarid');
$output->info(sprintf('%d events without a calendar have been cleaned up', $orphanItems));
$orphanItems = $this->removeOrphanChildren('calendarobjects_props', 'calendarobjects', 'objectid');
$output->info(sprintf('%d properties without an events have been cleaned up', $orphanItems));
$orphanItems = $this->removeOrphanChildren('calendarchanges', 'calendars', 'calendarid');
$output->info(sprintf('%d changes without a calendar have been cleaned up', $orphanItems));
$orphanItems = $this->removeOrphanChildren('calendarobjects', 'calendarsubscriptions', 'calendarid');
$output->info(sprintf('%d cached events without a calendar subscription have been cleaned up', $orphanItems));
$orphanItems = $this->removeOrphanChildren('calendarchanges', 'calendarsubscriptions', 'calendarid');
$output->info(sprintf('%d changes without a calendar subscription have been cleaned up', $orphanItems));
$orphanItems = $this->removeOrphanChildren('cards', 'addressbooks', 'addressbookid');
$output->info(sprintf('%d contacts without an addressbook have been cleaned up', $orphanItems));
$orphanItems = $this->removeOrphanChildren('cards_properties', 'cards', 'cardid');
$output->info(sprintf('%d properties without a contact have been cleaned up', $orphanItems));
$orphanItems = $this->removeOrphanChildren('addressbookchanges', 'addressbooks', 'addressbookid');
$output->info(sprintf('%d changes without an addressbook have been cleaned up', $orphanItems));
}
protected function removeOrphanChildren($childTable, $parentTable, $parentId): int {
$qb = $this->connection->getQueryBuilder();
$qb->select('c.id')
->from($childTable, 'c')
->leftJoin('c', $parentTable, 'p', $qb->expr()->eq('c.' . $parentId, 'p.id'))
->where($qb->expr()->isNull('p.id'));
if (\in_array($parentTable, ['calendars', 'calendarsubscriptions'], true)) {
$calendarType = $parentTable === 'calendarsubscriptions' ? CalDavBackend::CALENDAR_TYPE_SUBSCRIPTION : CalDavBackend::CALENDAR_TYPE_CALENDAR;
$qb->andWhere($qb->expr()->eq('c.calendartype', $qb->createNamedParameter($calendarType, IQueryBuilder::PARAM_INT), IQueryBuilder::PARAM_INT));
}
$result = $qb->execute();
$orphanItems = [];
while ($row = $result->fetch()) {
$orphanItems[] = (int) $row['id'];
}
$result->closeCursor();
if (!empty($orphanItems)) {
$qb->delete($childTable)
->where($qb->expr()->in('id', $qb->createParameter('ids')));
$orphanItemsBatch = array_chunk($orphanItems, 200);
foreach ($orphanItemsBatch as $items) {
$qb->setParameter('ids', $items, IQueryBuilder::PARAM_INT_ARRAY);
$qb->execute();
}
}
return count($orphanItems);
}
}
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