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<?php
/**
 * Copyright (C) 2019 Xibo Signage Ltd
 *
 * Xibo - Digital Signage - http://www.xibo.org.uk
 *
 * This file is part of Xibo.
 *
 * Xibo 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
 * any later version.
 *
 * Xibo 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 Xibo.  If not, see <http://www.gnu.org/licenses/>.
 */

use Phinx\Migration\AbstractMigration;

class NullableTextFieldsMigration extends AbstractMigration
{
    /** @inheritdoc */
    public function change()
    {
        $notNullableTextColumnsQuery = $this->query('SELECT TABLE_NAME, COLUMN_NAME, DATA_TYPE, IS_NULLABLE, COLUMN_DEFAULT FROM INFORMATION_SCHEMA.COLUMNS WHERE DATA_TYPE = \'text\' AND IS_NULLABLE = \'NO\' AND TABLE_SCHEMA = DATABASE() ' );
        $notNullableTextColumns = $notNullableTextColumnsQuery->fetchAll(PDO::FETCH_ASSOC);

foreach ($notNullableTextColumns as $columns) {
            $this->execute('ALTER TABLE ' . $columns['TABLE_NAME'] . ' MODIFY ' . $columns['COLUMN_NAME'] . ' TEXT NULL;');
        }
    }
}