Alter EventCommentMapper to enable the API to provide the users username on an EventComment. This is already the case with TalkComments and this somewhat standardises the response fields on Event and Talk comments

Author: cal-tec

src/models/EventCommentMapper.php

@@ -124,6 +124,7 @@ protected function formatOneComment($row, $verbose)
         // figure out user
         if ($row['user_id']) {
             $result['user_display_name'] = $row['full_name'];
+            $result['username']          = $row['username'];
             $result['user_uri']          = $base . '/' . $version . '/users/'
                                                     . $row['user_id'];
         } else {
@@ -147,7 +148,7 @@ protected function formatOneComment($row, $verbose)
 
     protected function getBasicSQL($include_hidden = false)
     {
-        $sql = 'select ec.*, user.email, user.full_name, e.event_tz_cont, e.event_tz_place '
+        $sql = 'select ec.*, user.username, user.email, user.full_name, e.event_tz_cont, e.event_tz_place '
                . 'from event_comments ec '
                . 'left join user on user.ID = ec.user_id '
                . 'inner join events e on ec.event_id = e.ID '