issue #120 - add idnumber field export option

classes/response/base.php

@@ -157,7 +157,7 @@ static public function response_select($rid, $col = null, $csvexport = false, $c
      */
     protected function user_fields_sql() {
         $userfieldsarr = get_all_user_name_fields();
-        $userfieldsarr = array_merge($userfieldsarr, ['username', 'department', 'institution']);
+        $userfieldsarr = array_merge($userfieldsarr, ['username', 'department', 'institution', 'idnumber']);
         $userfields = '';
         foreach ($userfieldsarr as $field) {
             $userfields .= $userfields === '' ? '' : ', ';

questionnaire.class.php

@@ -2407,7 +2407,7 @@ protected function choice_types() {
      */
     protected function user_fields() {
         $userfieldsarr = get_all_user_name_fields();
-        $userfieldsarr = array_merge($userfieldsarr, ['username', 'department', 'institution']);
+        $userfieldsarr = array_merge($userfieldsarr, ['username', 'department', 'institution', 'idnumber']);
         return $userfieldsarr;
     }
 
@@ -2552,6 +2552,9 @@ protected function process_csv_row(array &$row,
         if (in_array('id', $options)) {
             array_push($positioned, $uid);
         }
+        if (in_array('idnumber', $options)) {
+            array_push($positioned, $user->idnumber);
+        }
         if (in_array('fullname', $options)) {
             array_push($positioned, $fullname);
         }

settings.php

@@ -41,6 +41,7 @@
         'course' => get_string('course'),
         'group' => get_string('group'),
         'id' => get_string('id', 'questionnaire'),
+        'idnumber' => get_string('idnumber'),
         'fullname' => get_string('fullname'),
         'username' => get_string('username')
     );