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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\DAV\Migration;
use Closure;
use OCP\AppFramework\Services\IAppConfig;
use OCP\DB\ISchemaWrapper;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\DB\Types;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\SimpleMigrationStep;
class Version1025Date20240308063933 extends SimpleMigrationStep {
public function __construct(
private IAppConfig $appConfig,
private IDBConnection $db,
) {
}
/**
* @param IOutput $output
* @param Closure(): ISchemaWrapper $schemaClosure
* @param array $options
* @return null|ISchemaWrapper
*/
public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
/** @var ISchemaWrapper $schema */
$schema = $schemaClosure();
foreach (['addressbookchanges', 'calendarchanges'] as $tableName) {
$table = $schema->getTable($tableName);
if (!$table->hasColumn('created_at')) {
$table->addColumn('created_at', Types::INTEGER, [
'notnull' => true,
'length' => 4,
'default' => 0,
]);
}
}
return $schema;
}
public function postSchemaChange(IOutput $output, \Closure $schemaClosure, array $options): void {
// The threshold is higher than the default of \OCA\DAV\BackgroundJob\PruneOutdatedSyncTokensJob
// but small enough to fit into a cluster transaction size.
// For a 50k users instance that would still keep 10 changes on average.
$limit = max(1, (int)$this->appConfig->getAppValue('totalNumberOfSyncTokensToKeep', '500000'));
foreach (['addressbookchanges', 'calendarchanges'] as $tableName) {
$thresholdSelect = $this->db->getQueryBuilder();
$thresholdSelect->select('id')
->from($tableName)
->orderBy('id', 'desc')
->setFirstResult($limit)
->setMaxResults(1);
$oldestIdResult = $thresholdSelect->executeQuery();
$oldestId = $oldestIdResult->fetchColumn();
$oldestIdResult->closeCursor();
$qb = $this->db->getQueryBuilder();
$update = $qb->update($tableName)
->set('created_at', $qb->createNamedParameter(time(), IQueryBuilder::PARAM_INT))
->where(
$qb->expr()->eq('created_at', $qb->createNamedParameter(0, IQueryBuilder::PARAM_INT)),
);
// If there is a lot of data we only set timestamp for the most recent rows
// because the rest will be deleted by \OCA\DAV\BackgroundJob\PruneOutdatedSyncTokensJob
// anyway.
if ($oldestId !== false) {
$update->andWhere($qb->expr()->gt('id', $qb->createNamedParameter($oldestId, IQueryBuilder::PARAM_INT), IQueryBuilder::PARAM_INT));
}
$updated = $update->executeStatement();
$output->debug('Added a default creation timestamp to ' . $updated . ' rows in ' . $tableName);
}
}
}
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