Widget build()

in firebase-get-to-know-flutter/step_02/lib/src/authentication.dart [47:115]
69 lines of code
6 McCabe index (conditional complexity)

  Widget build(BuildContext context) {
    switch (loginState) {
      case ApplicationLoginState.loggedOut:
        return Row(
          children: [
            Padding(
              padding: const EdgeInsets.only(left: 24, bottom: 8),
              child: StyledButton(
                onPressed: () {
                  startLoginFlow();
                },
                child: const Text('RSVP'),
              ),
            ),
          ],
        );
      case ApplicationLoginState.emailAddress:
        return EmailForm(
            callback: (email) => verifyEmail(
                email, (e) => _showErrorDialog(context, 'Invalid email', e)));
      case ApplicationLoginState.password:
        return PasswordForm(
          email: email!,
          login: (email, password) {
            signInWithEmailAndPassword(email, password,
                (e) => _showErrorDialog(context, 'Failed to sign in', e));
          },
        );
      case ApplicationLoginState.register:
        return RegisterForm(
          email: email!,
          cancel: () {
            cancelRegistration();
          },
          registerAccount: (
            email,
            displayName,
            password,
          ) {
            registerAccount(
                email,
                displayName,
                password,
                (e) =>
                    _showErrorDialog(context, 'Failed to create account', e));
          },
        );
      case ApplicationLoginState.loggedIn:
        return Row(
          children: [
            Padding(
              padding: const EdgeInsets.only(left: 24, bottom: 8),
              child: StyledButton(
                onPressed: () {
                  signOut();
                },
                child: const Text('LOGOUT'),
              ),
            ),
          ],
        );
      default:
        return Row(
          children: const [
            Text("Internal error, this shouldn't happen..."),
          ],
        );
    }
  }