Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\node\ParamConverter;
Chris@0: 
Chris@14: use Drupal\Core\TempStore\PrivateTempStoreFactory;
Chris@0: use Symfony\Component\Routing\Route;
Chris@0: use Drupal\Core\ParamConverter\ParamConverterInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides upcasting for a node entity in preview.
Chris@0:  */
Chris@0: class NodePreviewConverter implements ParamConverterInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * Stores the tempstore factory.
Chris@0:    *
Chris@14:    * @var \Drupal\Core\TempStore\PrivateTempStoreFactory
Chris@0:    */
Chris@0:   protected $tempStoreFactory;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a new NodePreviewConverter.
Chris@0:    *
Chris@14:    * @param \Drupal\Core\TempStore\PrivateTempStoreFactory $temp_store_factory
Chris@0:    *   The factory for the temp store object.
Chris@0:    */
Chris@0:   public function __construct(PrivateTempStoreFactory $temp_store_factory) {
Chris@0:     $this->tempStoreFactory = $temp_store_factory;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function convert($value, $definition, $name, array $defaults) {
Chris@0:     $store = $this->tempStoreFactory->get('node_preview');
Chris@0:     if ($form_state = $store->get($value)) {
Chris@0:       return $form_state->getFormObject()->getEntity();
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function applies($definition, $name, Route $route) {
Chris@0:     if (!empty($definition['type']) && $definition['type'] == 'node_preview') {
Chris@0:       return TRUE;
Chris@0:     }
Chris@0:     return FALSE;
Chris@0:   }
Chris@0: 
Chris@0: }