<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2020 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
 * Website: https://www.espocrm.com
 *
 * EspoCRM 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.
 *
 * EspoCRM 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 EspoCRM. If not, see http://www.gnu.org/licenses/.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\Core\Utils\Database\Schema\rebuildActions;

class FulltextIndex extends \Espo\Core\Utils\Database\Schema\BaseRebuildActions
{
    public function beforeRebuild()
    {
        $currentSchema = $this->getCurrentSchema();
        $tables = $currentSchema->getTables();

        if (empty($tables)) return;

        $databaseHelper = new \Espo\Core\Utils\Database\Helper($this->getConfig());
        $connection = $databaseHelper->getDbalConnection();

        $metadataSchema = $this->getMetadataSchema();
        $tables = $metadataSchema->getTables();

        foreach ($tables as $table) {
            $tableName = $table->getName();
            $indexes = $table->getIndexes();

            foreach ($indexes as $index) {
                if (!$index->hasFlag('fulltext')) {
                    continue;
                }

                $columns = $index->getColumns();
                foreach ($columns as $columnName) {

                    $query = "SHOW FULL COLUMNS FROM `". $tableName ."` WHERE Field = '" . $columnName . "'";

                    try {
                        $row = $connection->fetchAssoc($query);
                    } catch (\Exception $e) {
                        continue;
                    }

                    switch (strtoupper($row['Type'])) {
                        case 'LONGTEXT':
                            $alterQuery = "ALTER TABLE `". $tableName ."` MODIFY `". $columnName ."` MEDIUMTEXT COLLATE ". $row['Collation'] ."";
                            $GLOBALS['log']->info('SCHEMA, Execute Query: ' . $alterQuery);
                            $connection->executeQuery($alterQuery);
                            break;
                    }
                }
            }
        }

    }
}

