PlatformInformation.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\Core\Database\Platform;
 
use Doctrine\DBAL\DBALException;
use Doctrine\DBAL\Platforms\AbstractPlatform;
use Doctrine\DBAL\Platforms\MySqlPlatform;
use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
use Doctrine\DBAL\Platforms\SqlitePlatform;
use Doctrine\DBAL\Platforms\SQLServerPlatform;
 
class ‪PlatformInformation
{
    protected static ‪$identifierLimits = [
        'mysql' => 63,
        'postgresql' => 63,
        'sqlserver' => 128,
        'sqlite' => 1024, // arbitrary limit, SQLite is only limited by the total statement length
    ];
 
    protected static ‪$bindParameterLimits = [
        'mysql' => 65535,
        'postgresql' => 34464,
        'sqlserver' => 2100,
        'sqlite' => 999,
    ];
 
    protected static ‪$charSetMap = [
        'mysql' => 'utf8mb4',
        'postgresql' => 'UTF8',
        'sqlserver' => 'UTF-8',
        'sqlite' => 'utf8',
    ];
 
    protected static ‪$databaseCreateWithCharsetMap = [
        'mysql' => 'CHARACTER SET %s',
        'postgresql' => "ENCODING '%s'",
        'sqlserver' => '',
    ];
 
    public static function ‪getCharset(AbstractPlatform $platform): string
    {
        $platformName = static::getPlatformIdentifier($platform);
 
        return static::$charSetMap[$platformName];
    }
 
    public static function ‪getDatabaseCreateStatementWithCharset(AbstractPlatform $platform, string $databaseName): string
    {
        try {
            $createStatement = $platform->getCreateDatabaseSQL($databaseName);
        } catch (DBALException $exception) {
            // just silently ignore that error as the selected database does not support any creation of a database
            return '';
        }
 
        $platformName = static::getPlatformIdentifier($platform);
        $charset = static::getCharset($platform);
 
        return $createStatement . ' ' . sprintf(static::$databaseCreateWithCharsetMap[$platformName], $charset);
    }
 
    public static function ‪getMaxIdentifierLength(AbstractPlatform $platform): int
    {
        $platformName = static::getPlatformIdentifier($platform);
 
        return self::$identifierLimits[$platformName];
    }
 
    public static function ‪getMaxBindParameters(AbstractPlatform $platform): int
    {
        $platformName = static::getPlatformIdentifier($platform);
 
        return self::$bindParameterLimits[$platformName];
    }
 
    protected static function ‪getPlatformIdentifier(AbstractPlatform $platform): string
    {
        if ($platform instanceof MySqlPlatform) {
            return 'mysql';
        }
        if ($platform instanceof PostgreSqlPlatform) {
            return 'postgresql';
        }
        if ($platform instanceof SQLServerPlatform) {
            return 'sqlserver';
        }
        if ($platform instanceof SqlitePlatform) {
            return 'sqlite';
        }
        throw new \RuntimeException(
            'Unsupported Databaseplatform "' . get_class($platform) . '" detected in PlatformInformation',
            1500958070
        );
    }
}