Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\views\Entity\Render;
Chris@0: 
Chris@0: use Drupal\Core\Entity\EntityInterface;
Chris@0: use Drupal\Core\TypedData\TranslatableInterface;
Chris@0: use Drupal\views\Plugin\views\PluginBase;
Chris@0: use Drupal\views\ResultRow;
Chris@0: 
Chris@0: /**
Chris@0:  * Trait used to instantiate the view's entity translation renderer.
Chris@0:  */
Chris@0: trait EntityTranslationRenderTrait {
Chris@0: 
Chris@0:   /**
Chris@0:    * The renderer to be used to render the entity row.
Chris@0:    *
Chris@0:    * @var \Drupal\views\Entity\Render\EntityTranslationRendererBase
Chris@0:    */
Chris@0:   protected $entityTranslationRenderer;
Chris@0: 
Chris@0:   /**
Chris@0:    * Returns the current renderer.
Chris@0:    *
Chris@0:    * @return \Drupal\views\Entity\Render\EntityTranslationRendererBase
Chris@0:    *   The configured renderer.
Chris@0:    */
Chris@0:   protected function getEntityTranslationRenderer() {
Chris@0:     if (!isset($this->entityTranslationRenderer)) {
Chris@0:       $view = $this->getView();
Chris@0:       $rendering_language = $view->display_handler->getOption('rendering_language');
Chris@0:       $langcode = NULL;
Chris@0:       $dynamic_renderers = [
Chris@0:         '***LANGUAGE_entity_translation***' => 'TranslationLanguageRenderer',
Chris@0:         '***LANGUAGE_entity_default***' => 'DefaultLanguageRenderer',
Chris@0:       ];
Chris@0:       if (isset($dynamic_renderers[$rendering_language])) {
Chris@0:         // Dynamic language set based on result rows or instance defaults.
Chris@0:         $renderer = $dynamic_renderers[$rendering_language];
Chris@0:       }
Chris@0:       else {
Chris@0:         if (strpos($rendering_language, '***LANGUAGE_') !== FALSE) {
Chris@0:           $langcode = PluginBase::queryLanguageSubstitutions()[$rendering_language];
Chris@0:         }
Chris@0:         else {
Chris@0:           // Specific langcode set.
Chris@0:           $langcode = $rendering_language;
Chris@0:         }
Chris@0:         $renderer = 'ConfigurableLanguageRenderer';
Chris@0:       }
Chris@0:       $class = '\Drupal\views\Entity\Render\\' . $renderer;
Chris@0:       $entity_type = $this->getEntityManager()->getDefinition($this->getEntityTypeId());
Chris@0:       $this->entityTranslationRenderer = new $class($view, $this->getLanguageManager(), $entity_type, $langcode);
Chris@0:     }
Chris@0:     return $this->entityTranslationRenderer;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Returns the entity translation matching the configured row language.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Entity\EntityInterface $entity
Chris@0:    *   The entity object the field value being processed is attached to.
Chris@0:    * @param \Drupal\views\ResultRow $row
Chris@0:    *   The result row the field value being processed belongs to.
Chris@0:    *
Chris@0:    * @return \Drupal\Core\Entity\FieldableEntityInterface
Chris@0:    *   The entity translation object for the specified row.
Chris@0:    */
Chris@0:   public function getEntityTranslation(EntityInterface $entity, ResultRow $row) {
Chris@0:     // We assume the same language should be used for all entity fields
Chris@0:     // belonging to a single row, even if they are attached to different entity
Chris@0:     // types. Below we apply language fallback to ensure a valid value is always
Chris@0:     // picked.
Chris@0:     $translation = $entity;
Chris@0:     if ($entity instanceof TranslatableInterface && count($entity->getTranslationLanguages()) > 1) {
Chris@0:       $langcode = $this->getEntityTranslationRenderer()->getLangcode($row);
Chris@0:       $translation = $this->getEntityManager()->getTranslationFromContext($entity, $langcode);
Chris@0:     }
Chris@0:     return $translation;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Returns the entity type identifier.
Chris@0:    *
Chris@0:    * @return string
Chris@0:    *   The entity type identifier.
Chris@0:    */
Chris@0:   abstract public function getEntityTypeId();
Chris@0: 
Chris@0:   /**
Chris@0:    * Returns the entity manager.
Chris@0:    *
Chris@0:    * @return \Drupal\Core\Entity\EntityManagerInterface
Chris@0:    *   The entity manager.
Chris@0:    */
Chris@0:   abstract protected function getEntityManager();
Chris@0: 
Chris@0:   /**
Chris@0:    * Returns the language manager.
Chris@0:    *
Chris@0:    * @return \Drupal\Core\Language\LanguageManagerInterface
Chris@0:    *   The language manager.
Chris@0:    */
Chris@0:   abstract protected function getLanguageManager();
Chris@0: 
Chris@0:   /**
Chris@0:    * Returns the top object of a view.
Chris@0:    *
Chris@0:    * @return \Drupal\views\ViewExecutable
Chris@0:    *   The view object.
Chris@0:    */
Chris@0:   abstract protected function getView();
Chris@0: 
Chris@0: }