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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the Zikula package. |
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* |
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* Copyright Zikula - https://ziku.la/ |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Zikula\Bundle\CoreBundle\Doctrine\Helper; |
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use Doctrine\DBAL\Connection; |
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use Doctrine\DBAL\Driver\AbstractMySQLDriver; |
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use Doctrine\DBAL\ParameterType; |
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class CharsetRecodeHelper |
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{ |
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/** |
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* @var Connection |
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*/ |
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private $conn; |
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public function __construct( |
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Connection $connection |
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) { |
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$this->conn = $connection; |
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} |
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private function isRequired(): bool |
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{ |
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$driver = $this->conn->getDriver(); |
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// recoding utf8 to utf8mb4 is only required for mysql |
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return $driver instanceof AbstractMySQLDriver; |
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} |
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public function getCommands(): array |
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{ |
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if (!$this->isRequired()) { |
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return []; |
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} |
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// the following is based on |
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// https://dba.stackexchange.com/questions/8239/how-to-easily-convert-utf8-tables-to-utf8mb4-in-mysql-5-5#answer-104866 |
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$commands = []; |
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$this->conn->executeQuery('use information_schema;'); |
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// database level |
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$rows = $this->retrieveCommands(' |
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SELECT CONCAT("ALTER DATABASE `",table_schema,"` CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;") AS _sql |
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FROM `TABLES` |
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WHERE table_schema LIKE ? |
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GROUP BY table_schema; |
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'); |
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$commands = array_merge($commands, $rows); |
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// table level |
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$rows = $this->retrieveCommands(' |
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SELECT CONCAT("ALTER TABLE `",table_schema,"`.`",table_name,"` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;") AS _sql |
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FROM `TABLES` |
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WHERE table_schema LIKE ? |
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GROUP BY table_schema, table_name; |
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'); |
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$commands = array_merge($commands, $rows); |
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// column level |
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$rows = $this->retrieveCommands(' |
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SELECT CONCAT("ALTER TABLE `",table_schema,"`.`",table_name, "` CHANGE `",column_name,"` `",column_name,"` ",data_type,"(",character_maximum_length,") CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci",IF(is_nullable="YES"," NULL"," NOT NULL"),";") AS _sql |
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FROM `COLUMNS` |
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WHERE table_schema LIKE ? |
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AND data_type IN (\'varchar\', \'char\'); |
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'); |
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$commands = array_merge($commands, $rows); |
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$rows = $this->retrieveCommands(' |
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SELECT CONCAT("ALTER TABLE `",table_schema,"`.`",table_name, "` CHANGE `",column_name,"` `",column_name,"` ",data_type," CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci",IF(is_nullable="YES"," NULL"," NOT NULL"),";") AS _sql |
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FROM `COLUMNS` |
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WHERE table_schema LIKE ? |
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AND data_type IN (\'text\', \'tinytext\', \'mediumtext\', \'longtext\'); |
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'); |
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$commands = array_merge($commands, $rows); |
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$this->conn->executeQuery('use ' . $this->conn->getDatabase() . ';'); |
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return $commands; |
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} |
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private function retrieveCommands(string $sql): array |
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{ |
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$result = []; |
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$stmt = $this->conn->executeQuery( |
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$sql, |
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[ |
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$this->conn->getDatabase() |
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], |
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[ |
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ParameterType::STRING |
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] |
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); |
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while ($row = $stmt->fetch()) { |
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$result[] = $row['_sql']; |
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} |
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return $result; |
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} |
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} |
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zikula /
core
