Resolve "Export der Teilnehmerliste: Call to a member function getClass() on null"

Closes #1192

Merge request studip/studip!706

lib/export/export_studipdata_func.inc.php

@@ -579,12 +579,14 @@ function export_teilis($inst_id, $ex_sem_id = "no")
     } else {
 
         if (!in_array($filter, words('awaiting claiming'))) {
+            $course = Course::find($range_id);
+
             $gruppe = [
-                'dozent'   => get_title_for_status('dozent', 2),
-                'tutor'    => get_title_for_status('tutor', 2),
-                'autor'    => get_title_for_status('autor', 2),
-                'user'     => get_title_for_status('user', 2),
-                'accepted' => get_title_for_status('accepted', 2)
+                'dozent'   => get_title_for_status('dozent', 2, $course->status),
+                'tutor'    => get_title_for_status('tutor', 2, $course->status),
+                'autor'    => get_title_for_status('autor', 2, $course->status),
+                'user'     => get_title_for_status('user', 2, $course->status),
+                'accepted' => get_title_for_status('accepted', 2, $course->status)
             ];
         } else {
             $gruppe[$filter] = _('Anmeldeliste');

lib/functions.php

@@ -1165,7 +1165,7 @@ function encode_header_parameter($name, $value)
  */
 function get_title_for_status($type, $count, $sem_type = NULL)
 {
-    global $SEM_TYPE, $DEFAULT_TITLE_FOR_STATUS;
+    global $SEM_CLASS, $SEM_TYPE, $DEFAULT_TITLE_FOR_STATUS;
 
     if (is_null($sem_type)) {
         $sem_type = Context::getArtNum();
@@ -1173,14 +1173,10 @@ function get_title_for_status($type, $count, $sem_type = NULL)
 
     $atype = 'title_'.$type;
     $index = $count == 1 ? 0 : 1;
+    $class_index = $count == 1 ? $atype : $atype . '_plural';
 
-    $class = $SEM_TYPE[$sem_type]->getClass();
-
-    $title = $class->offsetGet($count == 1 ? $atype : $atype . '_plural');
-
-    if (!$title) {
-        $title = $DEFAULT_TITLE_FOR_STATUS[$type][$index] ?: _('unbekannt');
-    }
+    $title = $SEM_CLASS[$SEM_TYPE[$sem_type]['class']][$class_index] ??
+             $DEFAULT_TITLE_FOR_STATUS[$type][$index] ?? _('unbekannt');
 
     return $title;
 }