Issue #3260103: Automatic entity label does not take into account the field constraints

auto_entitylabel.module

@@ -64,6 +64,51 @@ function auto_entitylabel_form_alter(&$form, FormStateInterface $form_state) {
   }
 }
 
+/**
+ * Entity builder to update the label by the pattern.
+ *
+ * It will be called two times on ContentEntityForm::validateForm()
+ * and EntityForm::submitForm()
+ *
+ * @param string $entity_type
+ *   Entity type.
+ * @param EntityInterface $entity
+ *   Entity to update the label.
+ * @param array $form
+ *   Form array.
+ * @param FormStateInterface $form_state
+ *   Form state.
+ */
+function auto_entitylabel_entity_builder_set_label($entity_type, EntityInterface $entity, array &$form, FormStateInterface $form_state) {
+
+  if ($entity instanceof ContentEntityInterface) {
+    $decorator = \Drupal::service('auto_entitylabel.entity_decorator');
+    /** @var \Drupal\auto_entitylabel\AutoEntityLabelManager $decorated_entity */
+    $decorated_entity = $decorator->decorate($entity);
+    if ($decorated_entity->hasLabel() && $decorated_entity->autoLabelNeeded()
+      && !$decorated_entity->isTitlePreserved()) {
+      $pattern = $decorated_entity->getPattern();
+      // Try to get from the form state the new value for the entity label.
+      if ($pattern) {
+        $token = str_replace(['[',']'], '', $pattern);
+        $parts = explode(':', $token);
+        $entity_type_token = \Drupal::service('token.entity_mapper')->getEntityTypeForTokenType($parts[0]);
+        if ($entity_type_token == $entity_type && isset($parts[1])) {
+          $field_name = $parts[1];
+
+          $value = $form_state->getValue($field_name);
+          // The method setLabel() will take this value to set
+          // the entity label.
+          $entity->set($field_name, $value);
+        }
+      }
+
+      $decorated_entity->setLabel();
+    }
+
+  }
+}
+
 /**
  * Implements hook_inline_entity_form_entity_form_alter().
  */
@@ -141,6 +186,9 @@ function auto_entitylabel_prepare_entityform(array &$form, ContentEntityInterfac
         break;
     }
 
+    // Set the entity builder for generate the entity label.
+    $form['#entity_builders']['auto_entitylabel'] = 'auto_entitylabel_entity_builder_set_label';
+
     $form['#auto_entitylabel_processed'] = TRUE;
   }
 }
@@ -162,6 +210,23 @@ function auto_entitylabel_entity_prepare_view($entity_type_id, array $entities,
   }
 }
 
+/**
+ * Implements hook_entity_create().
+ */
+function auto_entitylabel_entity_create(EntityInterface $entity) {
+  // Set the label when the entity is created programmaticaly with the
+  // method create.
+  if ($entity instanceof ContentEntityInterface) {
+    $decorator = \Drupal::service('auto_entitylabel.entity_decorator');
+    /** @var \Drupal\auto_entitylabel\AutoEntityLabelManager $decorated_entity */
+    $decorated_entity = $decorator->decorate($entity);
+    if ($decorated_entity->hasLabel() && $decorated_entity->autoLabelNeeded()
+      && !$decorated_entity->isTitlePreserved()) {
+      $decorated_entity->setLabel();
+    }
+  }
+}
+
 /**
  * Implements hook_entity_presave().
  */