<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace Fisharebest\Webtrees\Module\FamilyTreeNews\Schema;

use Fisharebest\Webtrees\Database;
use Fisharebest\Webtrees\DebugBar;
use Fisharebest\Webtrees\Schema\MigrationInterface;
use PDOException;

/**
 * Upgrade the database schema from version 2 to version 3.
 */
class Migration2 implements MigrationInterface
{
    /**
     * Upgrade to to the next version
     *
     * @return void
     */
    public function upgrade()
    {
        // Delete any data that might violate the new constraints
        Database::exec(
            "DELETE FROM `##news`" .
            " WHERE user_id   NOT IN (SELECT user_id   FROM `##user`  )" .
            " OR    gedcom_id NOT IN (SELECT gedcom_id FROM `##gedcom`)"
        );

        // Add the new constraints
        try {
            Database::exec(
                "ALTER TABLE `##news`" .
                " ADD FOREIGN KEY `##news_fk1` (user_id  ) REFERENCES `##user`   (user_id)   ON DELETE CASCADE," .
                " ADD FOREIGN KEY `##news_fk2` (gedcom_id) REFERENCES `##gedcom` (gedcom_id) ON DELETE CASCADE"
            );
        } catch (PDOException $ex) {
            // Already updated?
        }
    }
}
