Tag contacts that have a birthday date set and allow to directly select them

plugins/kolab_addressbook/lib/rcube_kolab_contacts.php

@@ -400,6 +400,11 @@ class rcube_kolab_contacts extends rcube_addressbook
         // NOTE: this is only some rough pre-filtering but probably includes false positives
         $squery = $this->_search_query($fields, $value, $mode);
 
+        // add magic selector to select contacts with birthday dates only
+        if (in_array('birthday', $required)) {
+            $squery[] = array('tags', '=', 'x-has-birthday');
+        }
+
         // get all/matching records
         $this->_fetch_contacts($squery);
 

plugins/libkolab/lib/kolab_format_contact.php

@@ -407,6 +407,22 @@ class kolab_format_contact extends kolab_format
         return array_unique(rcube_utils::normalize_string($data, true));
     }
 
+    /**
+     * Callback for kolab_storage_cache to get object specific tags to cache
+     *
+     * @return array List of tags to save in cache
+     */
+    public function get_tags()
+    {
+        $tags = array();
+
+        if (!empty($this->data['birthday'])) {
+            $tags[] = 'x-has-birthday';
+        }
+
+        return $tags;
+    }
+
     /**
      * Helper method to copy contents of an Address vector to the contact data object
      */