LocalImageProcessor.php

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<?php
namespace TYPO3\CMS\Core\Resource\Processing;

/*
 * 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!
 */

use TYPO3\CMS\Core\Utility\GeneralUtility;

class LocalImageProcessor implements ProcessorInterface
{
    protected $logger;

    public function __construct()
    {
        $logManager = GeneralUtility::makeInstance(\TYPO3\CMS\Core\Log\LogManager::class);
        $this->logger = $logManager->getLogger(__CLASS__);
    }

    public function canProcessTask(TaskInterface $task)
    {
        $canProcessTask = $task->getType() === 'Image';
        $canProcessTask = $canProcessTask & in_array($task->getName(), array('Preview', 'CropScaleMask'));
        return $canProcessTask;
    }

    public function processTask(TaskInterface $task)
    {
        if (!$this->canProcessTask($task)) {
            throw new \InvalidArgumentException('Cannot process task of type "' . $task->getType() . '.' . $task->getName() . '"', 1350570621);
        }
        if ($this->checkForExistingTargetFile($task)) {
            return;
        }
        $helper = $this->getHelperByTaskName($task->getName());
        try {
            $result = $helper->process($task);
            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(
                    array('width' => $imageDimensions[0], 'height' => $imageDimensions[1], 'size' => filesize($result['filePath']), 'checksum' => $task->getConfigurationChecksum())
                );
                $task->getTargetFile()->updateWithLocalFile($result['filePath']);

            // New dimensions + no new file (for instance svg)
            } elseif (!empty($result['width']) && !empty($result['height']) && empty($result['filePath'])) {
                $task->setExecuted(true);
                $task->getTargetFile()->setUsesOriginalFile();
                $task->getTargetFile()->updateProperties(
                    array('width' => $result['width'], 'height' => $result['height'], 'size' => $task->getSourceFile()->getSize(), 'checksum' => $task->getConfigurationChecksum())
                );

            // Seems we have no valid processing result
            } else {
                $task->setExecuted(false);
            }
        } catch (\Exception $e) {
            $task->setExecuted(false);
        }
    }

    protected function checkForExistingTargetFile(TaskInterface $task)
    {
        $processingFolder = $task->getTargetFile()->getStorage()->getProcessingFolder();
        $storage = $task->getTargetFile()->getStorage();
        // @todo: make proper use of the FAL API, see https://forge.typo3.org/issues/67126
        if ($processingFolder->hasFile($task->getTargetFileName()) && $storage->getDriverType() === 'Local') {
            $processedFileIdentifier = rtrim($processingFolder->getIdentifier(), '/') . '/' . $task->getTargetFileName();
            $configuration = $storage->getConfiguration();
            if ($configuration['pathType'] === 'relative') {
                $absoluteBasePath = PATH_site . $configuration['basePath'];
            } else {
                $absoluteBasePath = $configuration['basePath'];
            }
            $targetFile = $absoluteBasePath . ltrim($processedFileIdentifier, '/');

            $task->setExecuted(true);
            $imageDimensions = $this->getGraphicalFunctionsObject()->getImageDimensions($targetFile);
            $task->getTargetFile()->setName($task->getTargetFileName());
            $properties = array(
                'width' => $imageDimensions[0],
                'height' => $imageDimensions[1],
                'size' => filesize($targetFile),
                'checksum' => $task->getConfigurationChecksum()
            );
            $task->getTargetFile()->updateProperties($properties);

            return true;
        } else {
            return false;
        }
    }

    protected function getHelperByTaskName($taskName)
    {
        switch ($taskName) {
            case 'Preview':
                $helper = GeneralUtility::makeInstance(\TYPO3\CMS\Core\Resource\Processing\LocalPreviewHelper::class, $this);
            break;
            case 'CropScaleMask':
                $helper = GeneralUtility::makeInstance(\TYPO3\CMS\Core\Resource\Processing\LocalCropScaleMaskHelper::class, $this);
            break;
            default:
                throw new \InvalidArgumentException('Cannot find helper for task name: "' . $taskName . '"', 1353401352);
        }

        return $helper;
    }

    public function getTemporaryImageWithText($filename, $textline1, $textline2, $textline3)
    {
        GeneralUtility::logDeprecatedFunction();
        $graphicalFunctions = $this->getGraphicalFunctionsObject();
        $graphicalFunctions->getTemporaryImageWithText($filename, $textline1, $textline2, $textline3);
    }

    protected function getGraphicalFunctionsObject()
    {
        static $graphicalFunctionsObject = null;

        if ($graphicalFunctionsObject === null) {
            $graphicalFunctionsObject = GeneralUtility::makeInstance(\TYPO3\CMS\Core\Imaging\GraphicalFunctions::class);
        }

        return $graphicalFunctionsObject;
    }
}