DeferredBackendImageProcessor.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\Backend\Resource\Processing;
 
use Psr\Http\Message\ServerRequestInterface;
use ‪TYPO3\CMS\Backend\Routing\UriBuilder;
use ‪TYPO3\CMS\Core\Context\Context;
use ‪TYPO3\CMS\Core\Http\ApplicationType;
use ‪TYPO3\CMS\Core\Imaging\Exception\ZeroImageDimensionException;
use ‪TYPO3\CMS\Core\Imaging\ImageDimension;
use ‪TYPO3\CMS\Core\Resource\ProcessedFileRepository;
use ‪TYPO3\CMS\Core\Resource\Processing\ProcessorInterface;
use ‪TYPO3\CMS\Core\Resource\Processing\TaskInterface;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪DeferredBackendImageProcessor implements ‪ProcessorInterface
{
    public function ‪canProcessTask(‪TaskInterface $task): bool
    {
        $context = GeneralUtility::makeInstance(Context::class);
        return (‪$GLOBALS['TYPO3_REQUEST'] ?? null) instanceof ServerRequestInterface
            && ‪ApplicationType::fromRequest(‪$GLOBALS['TYPO3_REQUEST'])->isBackend()
            && $task->‪getType() === 'Image'
            && in_array($task->‪getName(), ['Preview', 'CropScaleMask'], true)
            && (!$context->hasAspect('fileProcessing') || $context->getPropertyFromAspect('fileProcessing', 'deferProcessing'))
            && $task->‪getSourceFile()->‪getProperty('width') > 0
            && $task->‪getSourceFile()->‪getProperty('height') > 0
            // Let the local image processor update the properties in case the target file exists already
            && !$task->‪getSourceFile()->‪getStorage()->‪getProcessingFolder()->‪hasFile($task->‪getTargetFileName());
    }
 
    public function ‪processTask(‪TaskInterface $task): void
    {
        try {
            $imageDimension = ‪ImageDimension::fromProcessingTask($task);
        } catch (‪ZeroImageDimensionException $e) {
            // To not fail image processing, we just assume an image dimension here
            $imageDimension = new ‪ImageDimension(64, 64);
        }
        $processedFile = $task->‪getTargetFile();
        if (!$processedFile->isPersisted()) {
            // For now, we need to persist the processed file in the repository to be able to reference its uid
            // We could instead introduce a processing queue and persist the information there
            $processedFileRepository = GeneralUtility::makeInstance(ProcessedFileRepository::class);
            $processedFileRepository->add($processedFile);
        }
        $processedFile->setName($task->‪getTargetFileName());
        $processingUrl = (string)GeneralUtility::makeInstance(UriBuilder::class)
            ->buildUriFromRoute(
                'image_processing',
                [
                    'id' => $processedFile->getUid(),
                ]
            );
        $processedFile->updateProcessingUrl(GeneralUtility::locationHeaderUrl($processingUrl));
        $processedFile->updateProperties(
            [
                'width' => $imageDimension->getWidth(),
                'height' => $imageDimension->getHeight(),
                'size' => 0,
                'checksum' => $task->‪getConfigurationChecksum(),
            ]
        );
        $task->‪setExecuted(true);
    }
}