resultex_network 1.1.0

A robust network error mapping adapter for the Resultex ecosystem using Dio.

Resultex Network 🌐

An elegant, resilient, and production-ready network companion for the Resultex functional error-handling ecosystem.

This package seamlessly bridges the gap between raw HTTP communications (using Dio) and structured domain-driven failures. It automatically intercepts API exceptions, maps HTTP status codes, and wraps responses into functional Result monads.

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Features ✨

• Umbrella Exports: No double-importing. Simply import resultex_network and get access to both network helpers and the entire core resultex library.
• Robust Dio Interceptor: An out-of-the-box ResultexDioInterceptor that captures network timeouts, socket issues, and server breakdowns.
• ️ Rich Failure Mapping: Automatically translates raw responses and HTTP status codes into domain failures (e.g., ValidationFailure, ServerFailure, UnauthorizedFailure, OfflineFailure).
• Future Guard Extension: Execute asynchronous network operations safely with .guard() and transform them directly into a functional Result<T, Failure>.
• ️ Clean Architecture Aligned: Keeps your Data Sources and Repositories decoupled, highly testable, and pure.

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Installation

Add resultex_network to your pubspec.yaml dependencies. (Note: You do not need to add resultex separately, as this package re-exports it).

dependencies:
  resultex_network: ^1.0.0

Getting Started 🚀

1. Setup the Dio Client & InterceptorRegister
   the ResultexDioInterceptor in your Dio instance. This ensures that any unexpected raw API throw-behaves are gracefully mapped to structured errors.

import 'package:dio/dio.dart';
import 'package:resultex_network/resultex_network.dart';

final dio = Dio(
  BaseOptions(
    baseUrl: '[https://api.example.com](https://api.example.com)',
    connectTimeout: const Duration(seconds: 5),
  ),
)
  ..interceptors.add(ResultexDioInterceptor());

2. Guarding API Requests in Data Sources
   With the .guard() extension on Future<Response

import 'package:dio/dio.dart';
import 'package:resultex_network/resultex_network.dart';

final dio = Dio(
  BaseOptions(
    baseUrl: '[https://api.example.com](https://api.example.com)',
    connectTimeout: const Duration(seconds: 5),
  ),
)
  ..interceptors.add(ResultexDioInterceptor());

3. Handling Results in the Presentation
   LayerBecause of the Umbrella Export, you have access to all Result patterns (like .fold()) right out of the box.

import 'package:flutter/material.dart';
import 'package:resultex_network/resultex_network.dart';

void fetchAndRender(UserRemoteDataSource dataSource) async {
  final result = await dataSource.getUserProfile('123');

  result.fold(
    onSuccess: (data) {
      print('User profile loaded: $data');
    },
    onFailure: (failure) {
// Map domain failures directly to user-friendly messages
      final errorMessage = failure.map(
        server: (_) => 'Our servers are currently sleeping. Try again later.',
        unauthorized: (_) => 'Your session has expired. Please log in again.',
        validation: (f) => 'Invalid fields: ${f.errors}',
        offline: (_) => 'No internet connection detected.',
        generic: (f) => f.message,
      );

      print('Error: $errorMessage');
    },
  );
}

License 📄

This project is licensed under the MIT License - see the LICENSE file for details.