import 'package:flutter/foundation.dart';

@immutable
class LoginState {
  const LoginState({
    this.username = '',
    this.password = '',
    this.obscurePassword = true,
    this.isSubmitting = false,
    this.errorMessage,
  });

  final String username;
  final String password;
  final bool obscurePassword;
  final bool isSubmitting;
  final String? errorMessage;

  static const _sentinel = Object();

  LoginState copyWith({
    String? username,
    String? password,
    bool? obscurePassword,
    bool? isSubmitting,
    Object? errorMessage = _sentinel,
  }) {
    return LoginState(
      username: username ?? this.username,
      password: password ?? this.password,
      obscurePassword: obscurePassword ?? this.obscurePassword,
      isSubmitting: isSubmitting ?? this.isSubmitting,
      errorMessage: identical(errorMessage, _sentinel)
          ? this.errorMessage
          : errorMessage as String?,
    );
  }
}