Batch function to handle notifications

os2forms_forloeb.module

@@ -97,3 +97,52 @@ function os2forms_forloeb_workflow_maestro_reassign_form_submit(&$form, &$form_s
     drupal_set_message("Content Reassigned");
 
 }
+
+/**
+ *  * Implements hook_maestro_batch_handlers().
+ *   *
+ *    * Array of function names and help text that will be displayed
+ *     * in the edit task form under the handler field.
+ *      */
+function os2forms_forloeb_maestro_batch_handlers() {
+      return [
+              'end_notification_batch_function' => t('Batch function to send out flow completion notification to initiator.'),
+      ];
+}
+
+/**
+    *  * @param int $processID
+    *   *   The Maestro process ID.
+    *    * @param int $queueID
+    *     *   The Maestro queue ID.
+    *      */
+function end_notification_batch_function($processID, $queueID) {
+
+   /*
+    * Pseudocode for handling this:
+    *
+    *     * Get entity item for webform which spawned this process
+    *      (ID "submission").
+    *       foreach handler in webform: {
+    *           if (email_handler) {
+    *               email_handler.submit();
+    *           }
+    *       }
+    */
+    $sid = MaestroEngine::getEntityIdentiferByUniqueID($processID, 'submission');
+
+    if ($sid) {
+        $webform_submission = \Drupal\webform\Entity\WebformSubmission::load($sid);
+        $webform =  $webform_submission->getWebform();
+        $handlers = $webform->getHandlers();
+
+        foreach ($handlers as $handler) {
+            if (method_exists($handler, 'getMessage')) {
+                $message = $handler->getMessage($webform_submission);
+                $handler->sendMessage($webform_submission, $message);
+            }
+        }
+    }
+
+    return TRUE;
+}