ImageProcessingService.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\Resource\Service;
 
use ‪TYPO3\CMS\Core\Context\Context;
use ‪TYPO3\CMS\Core\Context\FileProcessingAspect;
use ‪TYPO3\CMS\Core\Locking\ResourceMutex;
use ‪TYPO3\CMS\Core\Resource\Exception\FileAlreadyProcessedException;
use ‪TYPO3\CMS\Core\Resource\ProcessedFile;
use ‪TYPO3\CMS\Core\Resource\ProcessedFileRepository;
 
class ‪ImageProcessingService
{
    public function ‪__construct(
        private readonly ‪ProcessedFileRepository $processedFileRepository,
        private readonly ‪Context $context,
        private readonly ‪ResourceMutex $locker,
    ) {}
 
    public function ‪process(int $processedFileId): ‪ProcessedFile
    {
        $processedFile = $this->processedFileRepository->findByUid($processedFileId);
        try {
            $this->‪validateProcessedFile($processedFile);
            $hadToWaitForLock = $this->locker->acquireLock(self::class, (string)$processedFileId);
 
            if ($hadToWaitForLock) {
                // Fetch the processed file again, as it might have been processed by
                // another process while waiting for the lock
                $processedFile = $this->processedFileRepository->findByUid($processedFileId);
                $this->‪validateProcessedFile($processedFile);
            }
 
            $this->context->setAspect('fileProcessing', new ‪FileProcessingAspect(false));
            $processedFile = $processedFile->getOriginalFile()->process(
                $processedFile->getTaskIdentifier(),
                $processedFile->getProcessingConfiguration()
            );
 
            $this->‪validateProcessedFile($processedFile);
        } catch (‪FileAlreadyProcessedException $e) {
            $processedFile = $e->‪getProcessedFile();
        } finally {
            $this->locker->releaseLock(self::class);
        }
 
        return $processedFile;
    }
 
    private function ‪validateProcessedFile(‪ProcessedFile $processedFile): void
    {
        if ($processedFile->‪isProcessed()) {
            throw new ‪FileAlreadyProcessedException($processedFile, 1599395651);
        }
    }
}