Islandora IIIF: Add action to retrieve image attributes from IIIF server.

modules/islandora_iiif/config/optional/system.action.media_attributes_from_iiif_action.yml

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+langcode: en
+status: true
+dependencies:
+  module:
+    - islandora_iiif
+id: media_attributes_from_iiif_action
+label: 'Media attributes from IIIF'
+type: media
+plugin: islandora_iiif:media_attributes_from_iiif_action:media
+configuration: {  }

modules/islandora_iiif/islandora_iiif.install

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+<?php
+
+/**
+ * @file
+ * Install/update hook implementations.
+ */
+
+ /**
+ * Add Media Attributes from IIIF action.
+ */
+function islandora_iiif_update_92001(&$sandbox) {
+  $config_id = 'system.action.media_attributes_from_iiif_action';
+  $config_path = \Drupal::service('extension.list.module')->getPath('islandora_iiif') . '/config/optional/' . $config_id .'.yml';
+  $data = \Symfony\Component\Yaml\Yaml::parseFile($config_path);
+  \Drupal::configFactory()->getEditable($config_id)->setData($data)->save(TRUE);
+}

modules/islandora_iiif/src/Plugin/Action/MediaAttributesFromIiif.php

@@ -0,0 +1,169 @@
+<?php
+
+namespace Drupal\islandora_iiif\Plugin\Action;
+
+use Drupal\Component\Datetime\TimeInterface;
+use Drupal\Core\Action\Plugin\Action\SaveAction;
+use Drupal\Core\Config\ImmutableConfig;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\file\FileInterface;
+use Drupal\Core\Logger\LoggerChannelInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\islandora\IslandoraUtils;
+use Drupal\islandora\MediaSource\MediaSourceService;
+use Drupal\islandora_iiif\IiifInfo;
+use Drupal\media\MediaInterface;
+use Drupal\node\NodeInterface;
+use GuzzleHttp\Client;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+/**
+ * Provides an action that can save any entity.
+ *
+ * @Action(
+ *   id = "islandora_iiif:media_attributes_from_iiif_action",
+ *   action_label = @Translation("Add image dimensions retrieved from the IIIF server"),
+ *   deriver = "Drupal\Core\Action\Plugin\Action\Derivative\EntityChangedActionDeriver",
+ * )
+ */
+class MediaAttributesFromIiif extends SaveAction {
+
+  /**
+   * The HTTP client
+   *
+   * @var \GuzzleHttp\Client;
+   */
+  protected $httpClient;
+
+/**
+ * The IIIF Info service.
+ *
+ * @var IiifInfo
+ */
+protected $iiifInfo;
+
+  /**
+   * The logger.
+   *
+   * @var \Drupal\Core\Logger\LoggerChannelInterface
+   */
+  protected $logger;
+
+    /**
+   * Islandora utility functions.
+   *
+   * @var \Drupal\islandora\IslandoraUtils
+   */
+  protected $utils;
+
+  /**
+   * A MediaSourceService.
+   *
+   * @var \Drupal\islandora\MediaSource\MediaSourceService
+   */
+  protected $mediaSource;
+
+  /**
+   * Constructs a TiffMediaSaveAction object.
+   *
+   * @param mixed[] $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin ID for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   The entity type manager.
+   * @param \Drupal\Component\Datetime\TimeInterface $time
+   * @param
+   *   The time service.
+   * @param \Guzzle\Http\Client $http_client
+   * The HTTP Client.
+   * @param IiifInfo $iiif_info
+   * The IIIF INfo service.
+   * @param \Drupal\islandora\MediaSource\MediaSourceService $media_source
+   *   Media source service.
+   * @param \Drupal\Core\Logger\LoggerChannelInterface $channel
+   *   Logger channel.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, TimeInterface $time, Client $http_client, IiifInfo $iiif_info, IslandoraUtils $islandora_utils, MediaSourceService $media_source, LoggerChannelInterface $channel) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition, $entity_type_manager, $time);
+
+    $this->httpClient = $http_client;
+$this->iiifInfo = $iiif_info;
+$this->utils = $islandora_utils;
+$this->mediaSource = $media_source;
+$this->logger = $channel;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('entity_type.manager'),
+      $container->get('datetime.time'),
+      $container->get('http_client'),
+      $container->get('islandora_iiif'),
+      $container->get('islandora.utils'),
+      $container->get('islandora.media_source_service'),
+      $container->get('logger.channel.islandora')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function execute($entity = NULL ) {
+    $width = $height = FALSE;
+
+    // Get the original File media use term.
+    $original_file_term = $this->utils->getTermForUri('http://pcdm.org/use#OriginalFile');
+
+    /**
+     * @var \Drupal\media\MediaInterface $original_file_media
+     */
+    $original_file_mids = $this->utils->getMediaReferencingNodeAndTerm($entity, $original_file_term);
+    if (!empty($original_file_mids)) {
+
+      // Ordinarily there shouldn't be more than one Original File media but it's not guaranteed.
+      foreach($original_file_mids as $original_file_mid) {
+
+        /*
+        * @var \Drupal\Media\MediaInterface  $original_file_media
+        */
+        $original_file_media = $this->entityTypeManager->getStorage('media')->load($original_file_mid);
+
+        // Get the media MIME Type
+        $original_file = $this->mediaSource->getSourceFile($original_file_media);
+        $mime_type = $original_file->getMimeType();
+
+        if (in_array($mime_type, ['image/tiff', 'image/jp2'])) {
+          [$width, $height] = $this->iiifInfo->getImageDimensions($original_file);
+        }
+
+
+        // @todo Make field configurable. Low priority since this whole thing is a workaround for an Islandora limitation.
+        if ($original_file_media->hasField('field_width') && $original_file_media->hasField('field_height')) {
+          $original_file_media->set('field_height', $height);
+          $original_file_media->set('field_width', $width);
+          $original_file_media->save();
+        }
+      }
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
+
+    /** @var \Drupal\Core\Entity\EntityInterface $object */
+    return $object->access('update', $account, $return_as_object);
+  }
+
+  }