ImageProcessingService.php

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<?php
 
/*
 * 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
{
    private ‪$processedFileRepository;
 
    private ‪$context;
 
    private ‪$locker;
 
    public function ‪__construct(
        ‪ProcessedFileRepository ‪$processedFileRepository,
        ‪Context ‪$context,
        ‪ResourceMutex ‪$locker
    ) {
        $this->processedFileRepository = ‪$processedFileRepository;
        $this->context = ‪$context;
        $this->locker = ‪$locker;
    }
 
    public function ‪process(int $processedFileId): ‪ProcessedFile
    {
        $processedFile = $this->processedFileRepository->findByUid($processedFileId);
        try {
            $this->‪validateProcessedFile($processedFile);
            $this->locker->acquireLock(self::class, $processedFileId);
 
            // 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);
        }
    }
}