added filter

src/Plugin/ContextReaction/DerivativeReaction.php

@@ -2,6 +2,8 @@
 
 namespace Drupal\islandora\Plugin\ContextReaction;
 
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\islandora\Plugin\Action\AbstractGenerateDerivative;
 use Drupal\islandora\PresetReaction\PresetReaction;
 
 /**
@@ -12,4 +14,30 @@ use Drupal\islandora\PresetReaction\PresetReaction;
  *   label = @Translation("Derivative")
  * )
  */
-class DerivativeReaction extends PresetReaction {}
+class DerivativeReaction extends PresetReaction {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $actions = $this->actionStorage->loadMultiple();
+    foreach ($actions as $action) {
+      $plugin = $action->getPlugin();
+      if ($plugin instanceof AbstractGenerateDerivative) {
+        $options[ucfirst($action->getType())][$action->id()] = $action->label();
+      }
+    }
+    $config = $this->getConfiguration();
+    $form['actions'] = [
+      '#title' => $this->t('Actions'),
+      '#description' => $this->t('Pre-configured actions to execute. Multiple actions may be selected by shift or ctrl clicking.'),
+      '#type' => 'select',
+      '#multiple' => TRUE,
+      '#options' => $options,
+      '#default_value' => isset($config['actions']) ? $config['actions'] : '',
+      '#size' => 15,
+    ];
+
+    return $form;
+  }
+}