Display timestamp of latest bpn xml update in backend

public/typo3conf/ext/ep_products/Classes/Controller/BackendController.php

@@ -91,7 +91,14 @@ class BackendController extends ActionController
     }
 
     public function indexAction()
-    {}
+    {
+        $updatedTimestampPath = GeneralUtility::getFileAbsFileName('fileadmin/xmlexport/.lastupdate');
+        if ($updatedTimestampPath && file_exists($updatedTimestampPath)) {
+            $updatedTimestamp = file_get_contents($updatedTimestampPath);
+        }
+
+        $this->view->assign('updatedTimestamp', $updatedTimestamp);
+    }
 
     public function importProductsAction()
     {

public/typo3conf/ext/ep_products/Resources/Private/Templates/Backend/Index.html

@@ -7,6 +7,9 @@
     <f:section name="Main">
         <h1>E&amp;P Funktionen</h1>
         <f:flashMessages />
+        <p>
+            <strong>Letzter XML Abruf aus BusPro: {f:if(condition: updatedTimestamp, then: updatedTimestamp, else: '-')}</strong>
+        </p>
         <p>
             <f:link.action action="importProducts" class="btn btn-default">
                 <core:icon identifier="actions-refresh"/>