Custom network error types for easy error handling.

Getting started

Install the latest version from pub.dev.

dependencies:
  networkx: ^0.2.1

Usage

import 'package:networkx/networkx.dart';

void main() {
  const networkError = NetworkError.api(ApiValidationError.emailAlreadyExists);

  // `maybeWhen`
  networkError.maybeWhen(
    api: (error) {
      if (error == ApiValidationError.emailAlreadyExists) {
        print('Email already exists.');
      } else if (error == ApiValidationError.phoneNumberAlreadyExists) {
        print('Phone number already exists.');
      }
    },
    orElse: () => print('Something went wrong.'),
  );

  // `match`
  if (networkError.match((error) => error.isEmailAlreadyExists)) {
    print('Email already exists');
  }

  // `cast`
  final signUpError = networkError.cast(SignUpError.fromApiError);

  // `name`
  print(signUpError.name);
}

enum ApiValidationError {
  emailAlreadyExists,
  phoneNumberAlreadyExists;

  bool get isEmailAlreadyExists => this == emailAlreadyExists;

  bool get isPhoneNumberAlreadyExists => this == phoneNumberAlreadyExists;
}

enum SignUpError {
  emailAlreadyExists,
  phoneNumberAlreadyExists,
  otherValidationError;

  factory SignUpError.fromApiError(ApiValidationError error) {
    if (error.isEmailAlreadyExists) {
      return SignUpError.emailAlreadyExists;
    } else if (error.isPhoneNumberAlreadyExists) {
      return SignUpError.phoneNumberAlreadyExists;
    } else {
      return SignUpError.otherValidationError;
    }
  }
}

You can use it with any HTTP client library. For example, here, you can find an extension to the Dio library, so you don't have to write it from scratch. Or you can see an example project here for more detail and usage.

Maintainers

• Elias Andualem