class Collection {
  Collection({required this.name, int? createdAt})
    : createdAt = createdAt ?? DateTime.now().millisecondsSinceEpoch;

  factory Collection.fromJson(Map<String, dynamic> json) => Collection(
    name: json['name'] as String,
    createdAt: json['createdAt'] as int,
  );

  int createdAt; // used as Id with millisecondsSinceEpoch
  String name;

  @override
  bool operator ==(Object other) {
    if (other is Collection) {
      return hashCode == other.hashCode;
    } else {
      return false;
    }
  }

  @override
  int get hashCode => id.hashCode;

  int get id => createdAt;

  DateTime get createdDate => DateTime.fromMillisecondsSinceEpoch(createdAt);

  Map<String, dynamic> toJson() => {'name': name, 'createdAt': createdAt};

  Collection copyWith({String? name}) {
    return Collection(name: name ?? this.name, createdAt: createdAt);
  }
}