IcingaObject(Legacy): Render directly added groups

refs #12919

library/Director/Objects/IcingaObject.php

@@ -1863,6 +1863,18 @@ abstract class IcingaObject extends DbObject implements IcingaConfigRenderer
         }
     }
 
+    /**
+     * @return string
+     */
+    protected function renderLegacyGroups()
+    {
+        if ($this->supportsGroups()) {
+            return $this->groups()->toLegacyConfigString();
+        } else {
+            return '';
+        }
+    }
+
     /**
      * @return string
      */
@@ -2009,7 +2021,7 @@ abstract class IcingaObject extends DbObject implements IcingaConfigRenderer
             //$this->renderRanges(),
             //$this->renderArguments(),
             //$this->renderRelatedSets(),
-            //$this->renderGroups(),
+            $this->renderLegacyGroups(),
             //$this->renderMultiRelations(),
             //$this->renderCustomExtensions(),
             //$this->renderCustomVars(),

library/Director/Objects/IcingaObjectGroups.php

@@ -9,6 +9,7 @@ use Countable;
 use Icinga\Module\Director\Db\Cache\PrefetchCache;
 use Icinga\Module\Director\IcingaConfig\IcingaConfigRenderer;
 use Icinga\Module\Director\IcingaConfig\IcingaConfigHelper as c;
+use Icinga\Module\Director\IcingaConfig\IcingaLegacyConfigHelper as c1;
 
 class IcingaObjectGroups implements Iterator, Countable, IcingaConfigRenderer
 {
@@ -344,6 +345,18 @@ class IcingaObjectGroups implements Iterator, Countable, IcingaConfigRenderer
         return c::renderKeyValue('groups', c::renderArray($groups));
     }
 
+    public function toLegacyConfigString()
+    {
+        $groups = array_keys($this->groups);
+
+        if (empty($groups)) {
+            return '';
+        }
+
+        $type = $this->object->getLegacyObjectType();
+        return c1::renderKeyValue($type.'groups', c1::renderArray($groups));
+    }
+
     public function __toString()
     {
         try {