saveMediaFile example

throw new DocumentGenerationException('This document is dynamically generated and cannot be overwritten');
        }

        $mediaFile = $this->mediaService->fetchFile($uploadedFileRequest);

        $fileName = (string) $uploadedFileRequest->query->get('fileName');

        if ($fileName === '') {
            throw new DocumentGenerationException('Parameter "fileName" is missing');
        }

        $mediaId = $context->scope(Context::SYSTEM_SCOPE, fn (Context $context): string => $this->mediaService->saveMediaFile($mediaFile, $fileName, $context, 'document'));

        $this->connection->executeStatement(
            'UPDATE `document` SET `updated_at` = :now, `document_media_file_id` = :mediaId WHERE `id` = :id',
            [
                'id' => Uuid::fromHexToBytes($documentId),
                'mediaId' => Uuid::fromHexToBytes($mediaId),
                'now' => (new \DateTime())->format(Defaults::STORAGE_DATE_TIME_FORMAT),
            ],
        );

        return new DocumentIdStruct($documentId, $document->getDeepLinkCode(), $mediaId);
    }