CTDA9-512: IIIF Image API integration

composer.json

@@ -3,7 +3,7 @@
     "description": "Provides metadata and canvas information for IIIF Presentation API manifests in Drupal.",
     "type": "drupal-module",
     "require": {
-        "discoverygarden/iiif_presentation_api": "^2",
+        "discoverygarden/iiif_presentation_api": "^2.1",
         "islandora/islandora": "^2"
     },
     "license": "GPL-3.0-only"

islandora_iiif_presentation_api.services.yml

@@ -28,4 +28,6 @@ services:
     class: 'Drupal\islandora_iiif_presentation_api\Normalizer\V3\ImageItemNormalizer'
     tags:
       - { name: normalizer, priority: 25 }
-    arguments: ['@entity_type.manager']
+    arguments:
+      - '@entity_type.manager'
+      - '@event_dispatcher'

src/Normalizer/V3/ImageItemNormalizer.php

@@ -3,10 +3,13 @@
 namespace Drupal\islandora_iiif_presentation_api\Normalizer\V3;
 
 use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\file\FileInterface;
+use Drupal\iiif_presentation_api\Event\V3\ImageBodyEvent;
 use Drupal\iiif_presentation_api\Normalizer\EntityUriTrait;
 use Drupal\iiif_presentation_api\Normalizer\V3\NormalizerBase;
 use Drupal\image\Plugin\Field\FieldType\ImageItem;
 use Drupal\islandora_iiif_presentation_api\Normalizer\FieldItemSpecificNormalizerTrait;
+use Psr\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\Serializer\Exception\LogicException;
 
 /**
@@ -23,20 +26,12 @@ class ImageItemNormalizer extends NormalizerBase {
   protected $supportedInterfaceOrClass = ImageItem::class;
 
   /**
-   * The entity type manager.
-   *
-   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   * Constructor.
    */
-  protected EntityTypeManagerInterface $entityTypeManager;
-
-  /**
-   * Constructor for the ImageItemNormalizer.
-   *
-   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
-   *   The entity type manager.
-   */
-  public function __construct(EntityTypeManagerInterface $entity_type_manager) {
-    $this->entityTypeManager = $entity_type_manager;
+  public function __construct(
+    protected EntityTypeManagerInterface $entityTypeManager,
+    protected EventDispatcherInterface $eventDispatcher,
+  ) {
     $this->supportedReferenceField = 'field_media_image';
     $this->supportedEntityType = 'media';
   }
@@ -58,6 +53,7 @@ public function normalize($object, $format = NULL, array $context = []) {
       $normalized['width'] = (int) $values['width'];
     }
 
+    /** @var \Drupal\file\FileInterface $file */
     $file = $this->entityTypeManager->getStorage('file')->load($values['target_id']);
     if ($file) {
       $this->addCacheableDependency($context, $file);
@@ -68,21 +64,40 @@ public function normalize($object, $format = NULL, array $context = []) {
           [
             'id' => $this->getEntityUri($file, $context),
             'type' => 'Annotation',
-            'body' => [
-              'id' => $file->createFileUrl(FALSE),
-              'type' => 'Image',
-              'format' => $file->getMimeType(),
-            ],
+            'motivation' => 'painting',
+            'body' => $this->generateBody($file),
             'height' => (int) $normalized['height'],
             'width' => (int) $normalized['width'],
             'target' => $context['parent']['id'],
           ],
         ],
       ];
     }
+
     return $normalized;
   }
 
+  /**
+   * Generate the annotation body.
+   *
+   * @param \Drupal\file\FileInterface $file
+   *   The file for which to generate the body.
+   *
+   * @return array
+   *   An associative array representing the body.
+   */
+  protected function generateBody(FileInterface $file) : array {
+    /** @var \Drupal\iiif_presentation_api\Event\V3\ImageBodyEvent $event */
+    $event = $this->eventDispatcher->dispatch(new ImageBodyEvent($file));
+    $bodies = $event->getBodies();
+    if (!$bodies) {
+      return [];
+    }
+    $body = reset($bodies);
+    $body['service'] = array_merge(...array_filter(array_column($bodies, 'service')));
+    return $body;
+  }
+
   /**
    * {@inheritDoc}
    */

src/Normalizer/V3/ImageMediaEntityNormalizer.php

@@ -5,7 +5,6 @@
 use Drupal\iiif_presentation_api\Normalizer\EntityUriTrait;
 use Drupal\iiif_presentation_api\Normalizer\V3\ContentEntityNormalizer;
 use Drupal\media\MediaInterface;
-use Symfony\Component\Serializer\Exception\LogicException;
 
 /**
  * Normalizer for image media entities.
@@ -24,11 +23,13 @@ class ImageMediaEntityNormalizer extends ContentEntityNormalizer {
    */
   public function normalize($object, $format = NULL, array $context = []) {
     if (!isset($context['parent'])) {
-      throw new LogicException('Media must be normalized with a parent context.');
+      throw new \LogicException('Media must be normalized with a parent context.');
     }
     // XXX: If the parent is already a canvas just pass along the media's fields
     // to be normalized as opposed to creating a new level / item.
-    return $context['parent']['type'] === 'Manifest' ? parent::normalize($object, $format, $context) : $this->normalizeEntityFields($object, $format, $context, []);
+    return $context['parent']['type'] === 'Manifest' ?
+      parent::normalize($object, $format, $context) :
+      $this->normalizeEntityFields($object, $format, $context, []);
   }
 
   /**