enum NotificationType { general, invoice, event, } class NotificationEntity{ final String id; final String title; final String body; final NotificationType type; final DateTime dateTime; final bool isRead; NotificationEntity({ required this.title, required this.body, required this.dateTime, required this.id, required this.type, this.isRead = false, }); NotificationEntity copyWith({ String? id, String? title, String? body, NotificationType? type, DateTime? dateTime, bool? isRead, }) { return NotificationEntity( id: id ?? this.id, title: title ?? this.title, body: body ?? this.body, type: type ?? this.type, dateTime: dateTime ?? this.dateTime, isRead: isRead ?? this.isRead, ); } }