server/lib/private/Updater/ChangesMapper.php

<?php

declare(strict_types=1);

/**
 * @copyright Copyright (c) 2018 Arthur Schiwon <blizzz@arthur-schiwon.de>
 *
 * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
 *
 * @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 OC\Updater;

use OCP\AppFramework\Db\DoesNotExistException;
use OCP\AppFramework\Db\QBMapper;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;

class ChangesMapper extends QBMapper {
	const TABLE_NAME = 'whats_new';

	public function __construct(IDBConnection $db) {
		parent::__construct($db, self::TABLE_NAME);
	}

	/**
	 * @throws DoesNotExistException
	 */
	public function getChanges(string $version): ChangesResult {
		/* @var $qb IQueryBuilder */
		$qb = $this->db->getQueryBuilder();
		$result = $qb->select('*')
			->from(self::TABLE_NAME)
			->where($qb->expr()->eq('version', $qb->createNamedParameter($version)))
			->execute();

		$data = $result->fetch();
		$result->closeCursor();
		if ($data === false) {
			throw new DoesNotExistException('Changes info is not present');
		}
		return ChangesResult::fromRow($data);
	}
}