factory model in dart

void main(List<String> arguments) {
  // UserModel userModel = UserModel.fromJSON({"name": "sai", "uid": 123});
  UserModel saiModel = UserModel.fromFactory({"name": "sai", "id": 123});
  print(saiModel.name);
}

// facotry => design pattern

/**
 * A factory in Dart is a method or function that returns an instance or object of a class.
 *  It can be used as an alternative to the regular constructor, allowing for more flexibility in how objects are created.
 * A factory method can return an existing instance, create a new instance with specific arguments, or return a subtype of the class.
 *  To define a factory in Dart, you use the "factory" keyword before the method name and return an object of the class' type.
 */

class UserModel {
  late String name;
  late int uid;

  UserModel({required this.name, required this.uid});

  UserModel.fromJSON(Map map) {
    name = map['name'];
    uid = map['uid'];
  }

  factory UserModel.fromFactory(Map map) {
    return UserModel(name: map['name'], uid: map['id']);
  }
}