Merge branch 'feature/ISTWCMS-4523-ebremner-caching-information-for' into '8.x-1.x'

ISTWCMS-4523: adding cache busting for information for menu when new menu link is added

See merge request !25

uw_cfg_common.module

@@ -5,10 +5,31 @@
  * Module file.
  */
 
+use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\webform\WebformInterface;
 use Drupal\webform\WebformSubmissionStorageInterface;
 
+/**
+ * Implements hook_entity_presave().
+ */
+function uw_cfg_common_entity_presave(EntityInterface $entity) {
+
+  // Check if we are on a menu link.
+  if ($entity->getEntityTypeId() == 'menu_link_content') {
+
+    // Check that we are on a Information For (audience) link.
+    if ($entity->menu_name->value == 'uw-menu-audience-menu') {
+
+      // Invalid all the menu caching.
+      \Drupal::cache('menu')->invalidateAll();
+
+      // Rebuild all the menus.
+      \Drupal::service('plugin.manager.menu.link')->rebuild();
+    }
+  }
+}
+
 /**
  * Implements hook_form_FORM_ID_alter().
  *