claude refactor

lib/view/pages/timetable/data/lesson_status.dart

@@ -0,0 +1,21 @@
+import '../../../../api/webuntis/queries/getTimetable/getTimetableResponse.dart';
+
+enum LessonStatus {
+  cancelled,
+  irregular,
+  teacherChanged,
+  past,
+  ongoing,
+  regular,
+}
+
+class LessonStatusClassifier {
+  static LessonStatus classify(GetTimetableResponseObject lesson, DateTime startTime, DateTime endTime, DateTime now) {
+    if (lesson.code == 'cancelled') return LessonStatus.cancelled;
+    if (lesson.code == 'irregular' || (lesson.te.isNotEmpty && lesson.te.first.id == 0)) return LessonStatus.irregular;
+    if (lesson.te.any((t) => t.orgname != null)) return LessonStatus.teacherChanged;
+    if (endTime.isBefore(now)) return LessonStatus.past;
+    if (startTime.isBefore(now) && endTime.isAfter(now)) return LessonStatus.ongoing;
+    return LessonStatus.regular;
+  }
+}