owncloud/core

<?php
/**
 * @author Joas Schilling <coding@schilljs.com>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @license AGPL-3.0
 *
 * 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 OC\Repair;

use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;

class DropOldTables implements IRepairStep {
    /** @var IDBConnection */
    protected $connection;

    /**
     * @param IDBConnection $connection
     */
    public function __construct(IDBConnection $connection) {
        $this->connection = $connection;
    }

    /**
     * Returns the step's name
     *
     * @return string
     */
    public function getName() {
        return 'Drop old database tables';
    }

    /**
     * Run repair step.
     * Must throw exception on error.
     *
     * @throws \Exception in case of failure
     */
    public function run(IOutput $output) {
        foreach ($this->oldDatabaseTables() as $tableName) {
            if ($this->connection->tableExists($tableName)) {
                $this->connection->dropTable($tableName);
            }
        }
    }

    /**
     * Returns a list of outdated tables which are not used anymore
     * @return array
     */
    protected function oldDatabaseTables() {
        return [
            'calendar_calendars',
            'calendar_objects',
            'calendar_share_calendar',
            'calendar_share_event',
            'file_map',
            'foldersize',
            'fscache',
            'gallery_sharing',
            'locks',
            'log',
            'media_albums',
            'media_artists',
            'media_sessions',
            'media_songs',
            'media_users',
            'permissions',
            'pictures_images_cache',
            'principalgroups',
            'principals',
            'queuedtasks',
            'sharing',
            'clndr_calendars',
            'clndr_objects',
            'clndr_share_event',
            'clndr_share_calendar',
            'clndr_repeat',
            'contacts_addressbooks',
            'contacts_cards',
            'contacts_cards_properties'
        ];
    }
}