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<?php

declare(strict_types=1);

namespace Doctrine\DBAL\Driver\PDO\MySQL;

use Doctrine\DBAL\Driver\AbstractMySQLDriver;
use Doctrine\DBAL\Driver\PDO\Connection;
use Doctrine\DBAL\Driver\PDO\Exception;
use PDO;
use PDOException;
use SensitiveParameter;

final class Driver extends AbstractMySQLDriver
{
    /**
     * {@inheritDoc}
     */
    public function connect(
        #[SensitiveParameter]
        array $params,
    ): Connection {
        $driverOptions = $params['driverOptions'] ?? [];

        if (! empty($params['persistent'])) {
            $driverOptions[PDO::ATTR_PERSISTENT] = true;
        }

        $safeParams = $params;
        unset($safeParams['password']);

        try {
            $pdo = new PDO(
                $this->constructPdoDsn($safeParams),
                $params['user'] ?? '',
                $params['password'] ?? '',
                $driverOptions,
            );
        } catch (PDOException $exception) {
            throw Exception::new($exception);
        }

        return new Connection($pdo);
    }

    /**
     * Constructs the MySQL PDO DSN.
     *
     * @param mixed[] $params
     */
    private function constructPdoDsn(array $params): string
    {
        $dsn = 'mysql:';
        if (isset($params['host']) && $params['host'] !== '') {
            $dsn .= 'host=' . $params['host'] . ';';
        }

        if (isset($params['port'])) {
            $dsn .= 'port=' . $params['port'] . ';';
        }

        if (isset($params['dbname'])) {
            $dsn .= 'dbname=' . $params['dbname'] . ';';
        }

        if (isset($params['unix_socket'])) {
            $dsn .= 'unix_socket=' . $params['unix_socket'] . ';';
        }

        if (isset($params['charset'])) {
            $dsn .= 'charset=' . $params['charset'] . ';';
        }

        return $dsn;
    }
}