LocalImageProcessor.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\Processing;
 
use ‪TYPO3\CMS\Core\Imaging\GraphicalFunctions;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪LocalImageProcessor implements ‪ProcessorInterface
{
    public function ‪canProcessTask(‪TaskInterface $task): bool
    {
        return $task->‪getType() === 'Image'
            && in_array($task->‪getName(), ['Preview', 'CropScaleMask'], true);
    }
 
    public function ‪processTask(‪TaskInterface $task): void
    {
        if ($this->‪checkForExistingTargetFile($task)) {
            return;
        }
        $this->‪processTaskWithLocalFile($task, null);
    }
 
    public function ‪processTaskWithLocalFile(‪TaskInterface $task, ?string $localFile): void
    {
        $helper = $this->‪getHelperByTaskName($task->‪getName());
        try {
            if ($localFile === null) {
                $result = $helper->process($task);
            } else {
                $result = $helper->processWithLocalFile($task, $localFile);
            }
            if ($result === null) {
                $task->‪setExecuted(true);
                $task->‪getTargetFile()->‪setUsesOriginalFile();
            } elseif (!empty($result['filePath']) && file_exists($result['filePath'])) {
                $task->‪setExecuted(true);
                $imageDimensions = $this->‪getGraphicalFunctionsObject()->‪getImageDimensions($result['filePath']);
                $task->‪getTargetFile()->‪setName($task->‪getTargetFileName());
                $task->‪getTargetFile()->‪updateProperties(
                    ['width' => $imageDimensions[0], 'height' => $imageDimensions[1], 'size' => filesize($result['filePath']), 'checksum' => $task->‪getConfigurationChecksum()]
                );
                $task->‪getTargetFile()->‪updateWithLocalFile($result['filePath']);
            } else {
                // Seems we have no valid processing result
                $task->‪setExecuted(false);
            }
        } catch (\‪Exception $e) {
            $task->‪setExecuted(false);
        }
    }
 
    protected function ‪checkForExistingTargetFile(‪TaskInterface $task)
    {
        // the storage of the processed file, not of the original file!
        $storage = $task->‪getTargetFile()->‪getStorage();
        $processingFolder = $storage->‪getProcessingFolder($task->‪getSourceFile());
 
        // explicitly check for the raw filename here, as we check for files that existed before we even started
        // processing, i.e. that were processed earlier
        if ($processingFolder->hasFile($task->‪getTargetFileName())) {
            // When the processed file already exists set it as processed file
            $task->‪getTargetFile()->‪setName($task->‪getTargetFileName());
 
            // If the processed file is stored on a remote server, we must fetch a local copy of the file, as we
            // have no API for fetching file metadata from a remote file.
            $localProcessedFile = $storage->getFileForLocalProcessing($task->‪getTargetFile(), false);
            $task->‪setExecuted(true);
            $imageDimensions = $this->‪getGraphicalFunctionsObject()->‪getImageDimensions($localProcessedFile);
            $properties = [
                'width' => $imageDimensions[0],
                'height' => $imageDimensions[1],
                'size' => filesize($localProcessedFile),
                'checksum' => $task->‪getConfigurationChecksum()
            ];
            $task->‪getTargetFile()->‪updateProperties($properties);
 
            return true;
        }
        return false;
    }
 
    protected function ‪getHelperByTaskName($taskName)
    {
        switch ($taskName) {
            case 'Preview':
                $helper = GeneralUtility::makeInstance(LocalPreviewHelper::class);
            break;
            case 'CropScaleMask':
                $helper = GeneralUtility::makeInstance(LocalCropScaleMaskHelper::class);
            break;
            default:
                throw new \InvalidArgumentException('Cannot find helper for task name: "' . $taskName . '"', 1353401352);
        }
 
        return $helper;
    }
 
    protected function ‪getGraphicalFunctionsObject(): ‪GraphicalFunctions
    {
        return GeneralUtility::makeInstance(GraphicalFunctions::class);
    }
}