class Schedule {
  final int id;
  String title;
  DateTime startTime;
  DateTime endTime;
  DateTime? scheduleTime;
  DateTime createTime;

  Schedule({
    int? id,
    required this.title,
    required this.startTime,
    required this.endTime,
    this.scheduleTime,
    DateTime? createTime,
  }) : id = id ?? DateTime.now().millisecondsSinceEpoch ~/ 1000,
       createTime = DateTime.now();
}