Issue #3375397 by geoffreyr, ipwa: Field formatter should support Media fields

src/Plugin/Field/FieldFormatter/TinySliderFieldFormatter.php

@@ -5,6 +5,7 @@ namespace Drupal\tiny_slider\Plugin\Field\FieldFormatter;
 use Drupal\Component\Utility\Html;
 use Drupal\Component\Utility\Random;
 use Drupal\Core\Cache\Cache;
+use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldItemInterface;
@@ -25,7 +26,8 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  *   id = "tiny_slider_field_formatter",
  *   label = @Translation("Tiny Slider Carousel"),
  *   field_types = {
- *     "image"
+ *     "image",
+ *     "entity_reference"
  *   }
  * )
  */
@@ -493,21 +495,17 @@ class TinySliderFieldFormatter extends EntityReferenceFormatterBase implements C
 
     foreach ($files as $delta => $file) {
       if (isset($link_file)) {
-        $image_uri = $file->getFileUri();
+        $image_uri = $this->getEntityFileUrl($file);
         $url = \Drupal::service('file_url_generator')->generate($image_uri);
       }
       $cache_tags = Cache::mergeTags($cache_tags, $file->getCacheTags());
 
-      // Extract field item attributes for the theme function, and unset them
-      // from the $item so that the field template does not re-render them.
-      $item = $file->_referringItem;
-      $item_attributes = $item->_attributes;
-      unset($item->_attributes);
+      $item_info = $this->getEntityItem($file);
 
       $elements[$delta] = [
         '#theme' => 'image_formatter',
-        '#item' => $item,
-        '#item_attributes' => $item_attributes,
+        '#item' => $item_info['item'],
+        '#item_attributes' => $item_info['attributes'],
         '#image_style' => $image_style_setting,
         '#url' => $url,
         '#cache' => [
@@ -533,6 +531,70 @@ class TinySliderFieldFormatter extends EntityReferenceFormatterBase implements C
 
   }
 
+  /**
+   * Get the FieldItem
+   *
+   * @param EntityInterface $entity
+   *   The file or media entity.
+   *
+   * @return mixed[]
+   *   'item' is a \Drupal\Core\Field\FieldItemInterface.
+   *   'attributes' is an array of attributes.
+   */
+  protected function getEntityItem(EntityInterface $entity) {
+    // Extract field item attributes for the theme function, and unset them
+    // from the $item so that the field template does not re-render them.
+    $item = $entity->_referringItem;
+    $item_attributes = $item->_attributes;
+    unset($item->_attributes);
+
+    if ($entity->getEntityTypeId() === 'media') {
+      $file_id = $entity->getSource()->getSourceFieldValue($entity);
+      $file = \Drupal::entityTypeManager()->getStorage('file')->load($file_id);
+      // @see BlazyFormatterBase::getEntitiesToView().
+      $source_field = $entity->getSource()->getConfiguration()['source_field'];
+      $file_meta = $entity->get($source_field)->getValue()[0] ?? [];
+      $item = (object) [
+        'target_id' => $file->id(),
+        'alt' => $file_meta['alt'] ?? '',
+        'title' => $file_meta['title'] ?? '',
+        'width' => intval($file_meta['width'] ?? '0'),
+        'height' => intval($file_meta['height'] ?? '0'),
+        'entity' => $file,
+        '_loaded' => TRUE,
+        '_is_default' => TRUE,
+      ];
+    }
+
+    return [
+      'item' => $item,
+      'attributes' => $item_attributes,
+    ];
+  }
+
+  /**
+   * Fetch the URL of the file attached to this entity.
+   *
+   * Works with file or media entities.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $entity
+   *   The entity.
+   *
+   * @return \Drupal\Core\Url|null
+   *   The file URL if available.
+   */
+  protected function getEntityFileUrl(EntityInterface $entity): ?Url {
+    if ($entity->getEntityTypeId() === 'file') {
+      return $entity->getFileUri();
+    }
+    if ($entity->getEntityTypeId() === 'media') {
+      $file_id = $entity->getSource()->getSourceFieldValue($entity);
+      $file = \Drupal::entityTypeManager()->getStorage('file')->load($file_id);
+      return $file->getFileUri();
+    }
+    return NULL;
+  }
+
   /**
    * Generate the output appropriate for one field item.
    *