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Editing: Version18000Date20190920085628.php

<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
namespace OC\Core\Migrations;

use Closure;
use OCP\DB\ISchemaWrapper;
use OCP\DB\Types;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\SimpleMigrationStep;

class Version18000Date20190920085628 extends SimpleMigrationStep {
	public function __construct(
		protected IDBConnection $connection,
	) {
	}

/**
	 * @param IOutput $output
	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
	 * @param array $options
	 * @return null|ISchemaWrapper
	 */
	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
		/** @var ISchemaWrapper $schema */
		$schema = $schemaClosure();

if ($schema->hasTable('groups')) {
			$table = $schema->getTable('groups');

$table->addColumn('displayname', Types::STRING, [
				'notnull' => true,
				'length' => 255,
				// Will be overwritten in postSchemaChange, but Oracle can not save
				// empty strings in notnull columns
				'default' => 'name',
			]);
		}

return $schema;
	}

/**
	 * @param IOutput $output
	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
	 * @param array $options
	 */
	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options) {
		$query = $this->connection->getQueryBuilder();
		$query->update('groups')
			->set('displayname', 'gid');
		$query->executeStatement();
	}
}

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