diff --git a/lib/classes/User/Adapter.class.php b/lib/classes/User/Adapter.class.php
index 41820aaeba..aa77940c61 100644
--- a/lib/classes/User/Adapter.class.php
+++ b/lib/classes/User/Adapter.class.php
@@ -1023,6 +1023,37 @@ class User_Adapter implements User_Interface, cache_cacheableInterface
         return $this->ftp_dir_prefix;
     }
 
+    /**
+     * get array of base_id's on which the user is 'order master'
+     *
+     * @return array
+     */
+    public function get_order_master_bids()
+    {
+        $sql = 'SELECT base_id FROM basusr WHERE order_master=\'1\' AND usr_id= :id ';
+        $stmt = $this->appbox->get_connection()->prepare($sql);
+        $stmt->execute(array(':id' => $this->id));
+        $row = $stmt->fetchAll(PDO::FETCH_COLUMN);
+        $stmt->closeCursor();
+        foreach($row as $k=>$v)
+            $row[$k] = (int)$v;
+
+        return $row;
+    }
+
+    /**
+     * set the user as "order_master" on a collection
+     *
+     * @param int $bid
+     */
+    public function set_order_master($bid)
+    {
+        $sql = 'UPDATE basusr SET order_master=\'1\' WHERE usr_id= :id AND base_id= :bid';
+        $stmt = $this->appbox->get_connection()->prepare($sql);
+        $stmt->execute(array(':id' => $this->id, 'bid' => $bid));
+        $stmt->closeCursor();
+    }
+
     /**
      *
      * @param  <type> $id