refs #18390 [fid_bbi] use multiple functions for RVK display

* use getRvkWithMetadata as standard
* getRvk (without metadata) only as fallback

module/fid_bbi/src/fid_bbi/View/Helper/Root/RecordDataFormatterFactory.php

@@ -365,9 +365,16 @@ class RecordDataFormatterFactory extends \fid\View\Helper\Root\RecordDataFormatt
         $spec->setTemplateLine(
             'Subjects', 'getAllSubjectHeadingsExtended', 'data-allSubjectHeadingsExtended.phtml'
         );
+        /*
         $spec->setTemplateLine(
             'RVK', 'getRVK', 'data-rvk.phtml'
         );
+        */
+        $spec->setMultiLine(
+            'RVK',
+            true,
+            [$this,'multiRvk']
+        );
         $spec->setTemplateLine(
             'BK', 'getBK', 'data-bk.phtml'
         );
@@ -459,4 +466,42 @@ class RecordDataFormatterFactory extends \fid\View\Helper\Root\RecordDataFormatt
         ]);
         return $spec->getArray();
     }
+
+    /**
+     * return render details for rvk data
+     * uses two different functions
+     * @return callback
+     */
+    public function multiRvk($data, $options, $driver)
+    {
+        $args = func_get_args();
+        // Sort the data:
+        $final = [];
+        $data = $driver->tryMethod('getRvkWithMetadata');
+        if (!empty($data)) {
+            return [[
+                'label' => 'RVK',
+                'values' => $data,
+                'options' => [
+                    'pos' => $options['pos'],
+                    'renderType' => 'RecordDriverTemplate',
+                    'template' => 'data-rvkNotation.phtml',
+                ],
+            ]];
+        }
+        $data = $driver->tryMethod('getRvk');
+        if (!empty($data)) {
+            return [[
+                'label' => 'RVK',
+                'values' => $data,
+                'options' => [
+                    'pos' => $options['pos'],
+                    'renderType' => 'RecordDriverTemplate',
+                    'template' => 'data-rvk.phtml',
+                ],
+            ]];
+        }
+        return [];
+    }
+
 }