class Bookmark { Bookmark({ required this.collectionId, required this.name, required this.link, required this.description, int? createdAt, }) : createdAt = createdAt ?? DateTime.now().millisecondsSinceEpoch; factory Bookmark.fromJson(Map json) => Bookmark( collectionId: json['collectionId'] as int, name: json['name'] as String, link: json['link'] as String, description: json['description'] as String, createdAt: json['createdAt'] as int, ); int collectionId; String link; String name; String description; int createdAt; int get id => createdAt; DateTime get createdDate => DateTime.fromMillisecondsSinceEpoch(createdAt); Map toJson() => { 'collectionId': collectionId, 'name': name, 'link': link, 'description': description, 'createdAt': createdAt, }; }