Comment puis-je obtenir les images multimédia "apparence" TYPO3 en utilisant "ViewHelper"?

Question

merci de lire et de répondre ...

J'ai quelques éléments de la grille TYPO3 dans mon contenu TYPO3. Chaque élément de grille a un onglet "apparence", où je définis un fichier d'image. La relation de base de données de tt_content à l'image multimédia est dans sys_file_reference.

Ma question est comment puis-je obtenir ce fichier image dans mon modèle fluide en utilisant le ViewHelper et l'uid de ma gridelement?

Answer 1

j'ai écrit un peu ViewHelper (testé sur 7,6, mais ne devrait pas avoir besoin tant des changements de 8,7) pour obtenir des images référencées pour une mise en page du bulletin:

<?php 
    namespace Vendor\Extension\ViewHelpers; 

    use TYPO3\CMS\Core\Log\LogManager; 
    use TYPO3\CMS\Core\Resource\FileRepository; 
    use TYPO3\CMS\Core\Utility\GeneralUtility; 
    use TYPO3\CMS\Core\Resource\FileReference; 
    use TYPO3\CMS\Core\Resource\Exception; 
    use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper; 
    use TYPO3\CMS\Fluid\Core\ViewHelper\Facets\CompilableInterface; 
    use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer; 

    class ImagesReferencesViewHelper extends AbstractViewHelper implements CompilableInterface 
    { 

    /** 
    * Iterates through elements of $each and renders child nodes 
    * 
    * @param int  $uid  The ID of the element 
    * @param string $table  The Referenced table name 
    * @param string $fieldName The Referenced field name 
    * @param string $as  The name of the iteration variable 
    * @param string $key  The name of the variable to store the current array key 
    * @param boolean $reverse If enabled, the iterator will start with the last element and proceed reversely 
    * @param string $iteration The name of the variable to store iteration information (index, cycle, isFirst, isLast, isEven, isOdd) 
    * @param string $link  The name of the variable to store link 
    * 
    * @return string Rendered string 
    * @api 
    */ 
    public function render($uid, $table = 'tt_content', $fieldName = 'assets', $as, $key = '', $reverse = false, $iteration = null, $link = null) 
    { 
     return self::renderStatic($this->arguments, $this->buildRenderChildrenClosure(), $this->renderingContext); 
    } 

    /** 
    * @param array              $arguments 
    * @param \Closure             $renderChildrenClosure 
    * @param \TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface $renderingContext 
    * 
    * @return string 
    * @throws \TYPO3\CMS\Fluid\Core\ViewHelper\Exception 
    */ 
    static public function renderStatic(array $arguments, \Closure $renderChildrenClosure, \TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface $renderingContext) 
    { 
     $templateVariableContainer = $renderingContext->getTemplateVariableContainer(); 
     if ($arguments['uid'] === null || $arguments['table'] === null || $arguments['fieldName'] === null) { 
     return ''; 
     } 

     /** @var FileRepository $fileRepository */ 
     $fileRepository = GeneralUtility::makeInstance(FileRepository::class); 
     $images   = array(); 

     try { 
     $images = $fileRepository->findByRelation($arguments['table'], $arguments['fieldName'], $arguments['uid']); 
     } catch (Exception $e) { 
     /** @var \TYPO3\CMS\Core\Log\Logger $logger */ 
     $logger = GeneralUtility::makeInstance(LogManager::class)->getLogger(); 
     $logger->warning('The file-reference with uid "' . $arguments['uid'] . '" could not be found and won\'t be included in frontend output'); 
     } 

     if (is_object($images) && !$images instanceof \Traversable) { 
     throw new \TYPO3\CMS\Fluid\Core\ViewHelper\Exception('ImagesReferencesViewHelper only supports arrays and objects implementing \Traversable interface', 1248728393); 
     } 

     if ($arguments['reverse'] === true) { 
     // array_reverse only supports arrays 
     if (is_object($images)) { 
      $images = iterator_to_array($images); 
     } 
     $images = array_reverse($images); 
     } 
     $iterationData = array(
     'index' => 0, 
     'cycle' => 1, 
     'total' => count($images) 
    ); 

     $output = ''; 
     foreach ($images as $keyValue => $singleElement) { 
     $templateVariableContainer->add($arguments['as'], $singleElement); 

     /** @var FileReference $singleElement */ 
     if ($arguments['link'] !== null && $singleElement->getLink()) { 
      $link = $singleElement->getLink(); 
      /** @var ContentObjectRenderer $contentObject */ 
      $contentObject = GeneralUtility::makeInstance(ContentObjectRenderer::class); 
      $newLink  = $contentObject->typoLink_URL(array('parameter' => $link)); 
      $templateVariableContainer->add($arguments['link'], $newLink); 
     } 

     if ($arguments['key'] !== '') { 
      $templateVariableContainer->add($arguments['key'], $keyValue); 
     } 
     if ($arguments['iteration'] !== null) { 
      $iterationData['isFirst'] = $iterationData['cycle'] === 1; 
      $iterationData['isLast'] = $iterationData['cycle'] === $iterationData['total']; 
      $iterationData['isEven'] = $iterationData['cycle'] % 2 === 0; 
      $iterationData['isOdd'] = !$iterationData['isEven']; 
      $templateVariableContainer->add($arguments['iteration'], $iterationData); 
      $iterationData['index']++; 
      $iterationData['cycle']++; 
     } 
     $output .= $renderChildrenClosure(); 
     $templateVariableContainer->remove($arguments['as']); 
     if ($arguments['link'] !== null && $singleElement->getLink()) { 
      $templateVariableContainer->remove($arguments['link']); 
     } 
     if ($arguments['key'] !== '') { 
      $templateVariableContainer->remove($arguments['key']); 
     } 
     if ($arguments['iteration'] !== null) { 
      $templateVariableContainer->remove($arguments['iteration']); 
     } 
     } 
     return $output; 
    } 
    }