monitoring: Remove ContactgroupQuery::getGroup()

refs #9956

modules/monitoring/library/Monitoring/Backend/Ido/Query/ContactgroupQuery.php

@@ -13,6 +13,16 @@ class ContactgroupQuery extends IdoQuery
      */
     protected $allowCustomVars = true;
 
+    /**
+     * {@inheritdoc}
+     */
+    protected $groupBase = array('contactgroups' => array('cg.contactgroup_id', 'cgo.object_id'));
+
+    /**
+     * {@inheritdoc}
+     */
+    protected $groupOrigin = array('contacts', 'hosts', 'services');
+
     /**
      * {@inheritdoc}
      */
@@ -201,28 +211,4 @@ class ContactgroupQuery extends IdoQuery
             array()
         );
     }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function getGroup()
-    {
-        $group = array();
-        if ($this->hasJoinedVirtualTable('hosts') || $this->hasJoinedVirtualTable('services')) {
-            $group = array('cg.contactgroup_id', 'cgo.object_id');
-            if ($this->hasJoinedVirtualTable('contacts')) {
-                $group[] = 'c.contact_id';
-                $group[] = 'co.object_id';
-            }
-        } elseif ($this->hasJoinedVirtualTable('contacts')) {
-            $group = array(
-                'cg.contactgroup_id',
-                'cgo.object_id',
-                'c.contact_id',
-                'co.object_id'
-            );
-        }
-
-        return $group;
-    }
 }