<?php
/**
 * @copyright Copyright (c) 2017 Joas Schilling <coding@schilljs.com>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace OCP\Migration;

use Doctrine\DBAL\Schema\Schema;

/**
 * @since 13.0.0
 */
interface IMigrationStep {

	/**
	 * @param IOutput $output
	 * @since 13.0.0
	 */
	public function preSchemaChange(IOutput $output);

	/**
	 * @param \Closure $schema The `\Closure` returns a `Schema`
	 * @param array $options
	 * @return null|Schema
	 * @since 13.0.0
	 */
	public function changeSchema(\Closure $schema, array $options);

	/**
	 * @param IOutput $output
	 * @since 13.0.0
	 */
	public function postSchemaChange(IOutput $output);
}