<?php
/**
 * Authserver, an OAuth2-based single-signon authentication provider written in PHP.
 *
 * Copyright (C) $today.date  Lars Vierbergen
 *
 * his 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 Application\Migrations;

use Doctrine\DBAL\Migrations\AbstractMigration;
use Doctrine\DBAL\Schema\Schema;

class VersionAuthserverExternalAccount20171020220239 extends AbstractMigration
{

    public function up(Schema $schema)
    {
        $condition = 'WHERE ea1.id > ea2.id AND ea1.provider = ea2.provider AND ea1.provider_ref = ea2.provider_ref';
        $duplicates = $this->connection->fetchAll('SELECT DISTINCT ea1.id AS id FROM vierbergenlars_external_account_external_user AS ea1 JOIN vierbergenlars_external_account_external_user ea2 ' . $condition);
        $duplicateIds = array_map(function ($row) {
            return $row['id'];
        }, $duplicates);
        $this->connection->executeUpdate('DELETE FROM vierbergenlars_external_account_external_user WHERE id IN(' . implode(',', $duplicateIds) . ')');
    }

    public function down(Schema $schema)
    {
        $this->throwIrreversibleMigrationException('Duplicate external account references have been cleared.');
    }
}