MySql.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Install\SystemEnvironment\DatabaseCheck\Platform;
 
use ‪TYPO3\CMS\Core\Database\Connection;
use ‪TYPO3\CMS\Core\Database\ConnectionPool;
use ‪TYPO3\CMS\Core\Messaging\FlashMessage;
use ‪TYPO3\CMS\Core\Messaging\FlashMessageQueue;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪MySql extends ‪AbstractPlatform
{
    protected ‪$minimumMySQLVersion = '5.5.0';
 
    protected ‪$incompatibleSqlModes = [
        'NO_BACKSLASH_ESCAPES',
    ];
 
    protected ‪$databaseCharsetToCheck = [
        'utf8',
        'utf8mb3',
        'utf8mb4',
    ];
 
    protected ‪$databaseServerCharsetToCheck = [
        'utf8',
        'utf8mb3',
        'utf8mb4',
    ];
 
    public function ‪getStatus(): ‪FlashMessageQueue
    {
        $defaultConnection = GeneralUtility::makeInstance(ConnectionPool::class)
            ->getConnectionByName(ConnectionPool::DEFAULT_CONNECTION_NAME);
        if (strpos($defaultConnection->getServerVersion(), 'MySQL') !== 0) {
            return ‪$this->messageQueue;
        }
        $this->‪checkMysqlVersion($defaultConnection);
        $this->‪checkInvalidSqlModes($defaultConnection);
        $this->‪checkDefaultDatabaseCharset($defaultConnection);
        $this->‪checkDefaultDatabaseServerCharset($defaultConnection);
        $this->‪checkDatabaseName($defaultConnection);
        return ‪$this->messageQueue;
    }
 
    protected function ‪checkInvalidSqlModes(‪Connection $connection)
    {
        $detectedIncompatibleSqlModes = $this->‪getIncompatibleSqlModes($connection);
        if (!empty($detectedIncompatibleSqlModes)) {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                'Incompatible SQL modes have been detected:'
                    . ' ' . implode(', ', $detectedIncompatibleSqlModes) . '.'
                    . ' The listed modes are not compatible with TYPO3 CMS.'
                    . ' You have to change that setting in your MySQL environment'
                    . ' or in $GLOBALS[\'TYPO3_CONF_VARS\'][\'DB\'][\'Connections\'][\'Default\'][\'initCommands\']',
                'Incompatible SQL modes found!',
                ‪FlashMessage::ERROR
            ));
        } else {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                '',
                'No incompatible SQL modes found.'
            ));
        }
    }
 
    protected function ‪checkMysqlVersion(‪Connection $connection)
    {
        preg_match('/MySQL ((\d+\.)*(\d+\.)*\d+)/', $connection->‪getServerVersion(), $match);
        $currentMysqlVersion = $match[1];
        if (version_compare($currentMysqlVersion, $this->minimumMySQLVersion, '<')) {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                'Your MySQL version ' . $currentMysqlVersion . ' is too old. TYPO3 CMS does not run'
                    . ' with this version. Update to at least MySQL ' . $this->minimumMySQLVersion,
                'MySQL version too low',
                ‪FlashMessage::ERROR
            ));
        } else {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                '',
                'MySQL version is fine'
            ));
        }
    }
 
    public function ‪checkDefaultDatabaseCharset(‪Connection $connection): void
    {
        $queryBuilder = $connection->‪createQueryBuilder();
        $defaultDatabaseCharset = (string)$queryBuilder->select('DEFAULT_CHARACTER_SET_NAME')
            ->from('information_schema.SCHEMATA')
            ->where(
                $queryBuilder->expr()->eq(
                    'SCHEMA_NAME',
                    $queryBuilder->createNamedParameter($connection->getDatabase(), Connection::PARAM_STR)
                )
            )
            ->setMaxResults(1)
            ->executeQuery()
            ->fetchOne();
 
        if (!in_array($defaultDatabaseCharset, $this->databaseCharsetToCheck, true)) {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                sprintf(
                    'Checking database character set failed, got key "%s" instead of "%s"',
                    $defaultDatabaseCharset,
                    implode(' or ', $this->databaseCharsetToCheck)
                ),
                'MySQL database character set check failed',
                ‪FlashMessage::ERROR
            ));
        } else {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                '',
                sprintf('MySQL database uses %s. All good.', implode(' or ', $this->databaseCharsetToCheck))
            ));
        }
    }
 
    protected function ‪getIncompatibleSqlModes(‪Connection $connection): array
    {
        $sqlModes = explode(',', (string)$connection->executeQuery('SELECT @@SESSION.sql_mode;')->fetchOne());
        return array_intersect($this->incompatibleSqlModes, $sqlModes);
    }
 
    public function ‪checkDefaultDatabaseServerCharset(‪Connection $connection): void
    {
        $defaultServerCharset = $connection->executeQuery('SHOW VARIABLES LIKE \'character_set_server\'')->fetchAssociative();
 
        if (!in_array($defaultServerCharset['Value'], $this->databaseServerCharsetToCheck, true)) {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                sprintf(
                    'Checking server character set failed, got key "%s" instead of "%s"',
                    $defaultServerCharset['Value'],
                    implode(' or ', $this->databaseServerCharsetToCheck)
                ),
                'MySQL database server character set check failed',
                ‪FlashMessage::INFO
            ));
        } else {
            $this->messageQueue->enqueue(new ‪FlashMessage(
                '',
                sprintf('MySQL server default uses %s. All good.', implode(' or ', $this->databaseCharsetToCheck))
            ));
        }
    }
 
    public static function ‪isValidDatabaseName(string $databaseName): bool
    {
        return strlen($databaseName) <= static::SCHEMA_NAME_MAX_LENGTH && preg_match('/^[\x{0001}-\x{FFFF}]*$/u', $databaseName);
    }
 
    protected function ‪checkDatabaseName(‪Connection $connection): void
    {
        if (static::isValidDatabaseName((string)$connection->getDatabase())) {
            return;
        }
 
        $this->messageQueue->enqueue(
            new ‪FlashMessage(
                'The given database name must not be longer than ' . static::SCHEMA_NAME_MAX_LENGTH . ' characters'
                . ' and consist of the Unicode Basic Multilingual Plane (BMP), except U+0000',
                'Database name not valid',
                ‪FlashMessage::ERROR
            )
        );
    }
}