<?php

declare(strict_types=1);

/**
 * @author Daniel Kesselberg <mail@danielkesselberg.de>
 *
 * Mail
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\Mail\Migration;

use OCP\DB\ISchemaWrapper;
use OCP\Migration\SimpleMigrationStep;
use OCP\Migration\IOutput;

class Version0110Date20180825195812 extends SimpleMigrationStep {

	/**
	 * @param IOutput $output
	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
	 * @param array $options
	 * @return null|ISchemaWrapper
	 * @throws \Doctrine\DBAL\Schema\SchemaException
	 */
	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
		/** @var ISchemaWrapper $schema */
		$schema = $schemaClosure();
		
		$table = $schema->getTable('mail_attachments');

		if ($table->hasIndex('mail_attachments_userid_index')) {
			$table->dropIndex('mail_attachments_userid_index');
		}

		if (!$table->hasIndex('mail_attach_userid_index')) {
			$table->addIndex(['user_id'], 'mail_attach_userid_index');
		}

		return $schema;
	}
}
