1 files changed, 20 insertions, 0 deletions
diff --git a/lib/kolab_api_service.php b/lib/kolab_api_service.php
index fa5bd8e..c8f2680 100644
--- a/lib/kolab_api_service.php
+++ b/lib/kolab_api_service.php
@@ -560,4 +560,24 @@ abstract class kolab_api_service
 
         return $unique_attr;
     }
+
+    /**
+     * Returns unique attribute for specified entry DN
+     *
+     * @return string Unique attribute value
+     */
+    protected function unique_attribute_value($dn)
+    {
+        // this method can be called internally quite often
+        // let's cache results in memory
+        if (!empty($this->cache['unique_attributes'][$dn])) {
+            return $this->cache['unique_attributes'][$dn];
+        }
+
+        $unique_attr = $this->unique_attribute();
+        $auth        = Auth::get_instance();
+        $result      = $auth->get_entry_attribute($dn, $unique_attr);
+
+        return $this->cache['unique_attributes'][$dn] = $result;
+    }
 }