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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\Resource\Service;
use TYPO3\CMS\Core\Resource\FileInterface;
/**
* Resources can contain configurations: For example to define image dimensions or
* image masking. Resource configurations form part of the object identity and are
* used to create an object signature that itself is used to cache objects but NOT
* to reconstruct them. To prevent objects to be reconstructed they MUST NOT be
* serialized. This is why an object signature is obtained by serializing its array
* rather than serializing it directly. But attention...as well the objects array
* MUST NOT contain resource objects which could be the case when a configuration
* defines image masking. Here this service comes into play: it serializes any
* object configuration, as well those containing resources.
*/
class ConfigurationService
{
public function serialize(array $configuration): string
{
return serialize($this->makeSerializable($configuration));
}
/**
* Recursively substitute file objects with their array representation.
*/
protected function makeSerializable(array $configuration): array
{
return array_map(function ($value) {
if (is_array($value)) {
return $this->makeSerializable($value);
}
if ($value instanceof FileInterface) {
return $value->toArray();
}
return $value;
}, $configuration);
}
}