Using Authority Link fields in addition to field_external_uri

src/IslandoraUtils.php

@@ -235,12 +235,32 @@ class IslandoraUtils {
    *   Calling getStorage() throws if the storage handler couldn't be loaded.
    */
   public function getTermForUri($uri) {
-    $results = $this->entityQuery->get('taxonomy_term')
-      ->condition(self::EXTERNAL_URI_FIELD . '.uri', $uri)
+    // Get authority link fields to search.
+    $field_map = $this->entityFieldManager->getFieldMap();
+    $fields = [];
+    foreach ($field_map['taxonomy_term'] as $field_name => $field_data) {
+      if ($field_data['type'] == 'authority_link') {
+        $fields[] = $field_name;
+      }
+    }
+    // Add field_external_uri.
+    $fields[] = self::EXTERNAL_URI_FIELD;
+
+    $query = $this->entityQuery->get('taxonomy_term');
+
+    $orGroup = $query->orConditionGroup();
+    foreach ($fields as $field) {
+      $orGroup->condition("$field.uri", $uri);
+    }
+
+    $results = $query
+      ->condition($orGroup)
       ->execute();
+
     if (empty($results)) {
       return NULL;
     }
+
     return $this->entityTypeManager->getStorage('taxonomy_term')->load(reset($results));
   }
 
@@ -258,16 +278,33 @@ class IslandoraUtils {
    *   be created.
    */
   public function getUriForTerm(TermInterface $term) {
-    if ($term && $term->hasField(self::EXTERNAL_URI_FIELD)) {
-      $field = $term->get(self::EXTERNAL_URI_FIELD);
+    $fields = $this->getUriFieldNamesForTerms();
+    foreach ($fields as $field_name) {
+      if ($term && $term->hasField($field_name)) {
+        $field = $term->get($field_name);
         if (!$field->isEmpty()) {
           $link = $field->first()->getValue();
           return $link['uri'];
         }
       }
+    }
     return NULL;
   }
 
+  public function getUriFieldNamesForTerms() {
+    // Get authority link fields to search.
+    $field_map = $this->entityFieldManager->getFieldMap();
+    $fields = [];
+    foreach ($field_map['taxonomy_term'] as $field_name => $field_data) {
+      if ($field_data['type'] == 'authority_link') {
+        $fields[] = $field_name;
+      }
+    }
+    // Add field_external_uri.
+    $fields[] = self::EXTERNAL_URI_FIELD;
+    return $fields;
+  }
+
   /**
    * Executes context reactions for a Node.
    *

src/Plugin/Condition/NodeHasTerm.php

@@ -123,6 +123,22 @@ class NodeHasTerm extends ConditionPluginBase implements ContainerFactoryPluginI
     return parent::buildConfigurationForm($form, $form_state);
   }
 
+  public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
+    parent::validateConfigurationForm($form, $form_state);
+    $value = $form_state->getValue('term');
+    foreach ($value as $target) {
+      $tid = $target['target_id'];
+      $term = $this->entityTypeManager->getStorage('taxonomy_term')->load($tid);
+      $uri = $this->utils->getUriForTerm($term);
+      if (empty($uri)) {
+        $form_state->setErrorByName(
+          'term',
+          $this->t('@name does not have an external URI.  Give it an Authority Link or the External Uri field.', ['@name' => $term->label()])
+        );
+      }
+    }
+  }
+
   /**
    * {@inheritdoc}
    */
@@ -176,15 +192,23 @@ class NodeHasTerm extends ConditionPluginBase implements ContainerFactoryPluginI
    */
   protected function evaluateEntity(EntityInterface $entity) {
     // Find the terms on the node.
-    $terms = array_filter($entity->referencedEntities(), function ($entity) {
-      return $entity->getEntityTypeId() == 'taxonomy_term' &&
-         $entity->hasField(IslandoraUtils::EXTERNAL_URI_FIELD) &&
-         !$entity->get(IslandoraUtils::EXTERNAL_URI_FIELD)->isEmpty();
+    $field_names = $this->utils->getUriFieldNamesForTerms();
+    $terms = array_filter($entity->referencedEntities(), function ($entity) use ($field_names) {
+      if ($entity->getEntityTypeId() != 'taxonomy_term') {
+        return FALSE;
+      }
+
+      foreach ($field_names as $field_name) {
+	 if ($entity->hasField($field_name) && !$entity->get($field_name)->isEmpty()) {
+           return TRUE;
+	 }
+      }
+      return FALSE;
     });
 
     // Get their URIs.
     $haystack = array_map(function ($term) {
-        return $term->get(IslandoraUtils::EXTERNAL_URI_FIELD)->first()->getValue()['uri'];
+        return $this->utils->getUriForTerm($term);
       },
       $terms
     );