dev4jam

import 'package:freezed_annotation/freezed_annotation.dart';
import 'dart:io';

part 'NetworkRequestBody.freezed.dart';
part 'NetworkResponse.freezed.dart';

class AccessTokenResponse {
  String? accessToken;
  AccessTokenResponse.fromJson(Map<String, dynamic> json) {
    accessToken = json['access_token'];

dev4jam

class NetworkService {
  NetworkService({
    required this.baseUrl,
    dioClient,
    httpHeaders,
  })  : this._dio = dioClient,
        this._headers = httpHeaders ?? {};
  Dio? _dio;
  final String baseUrl;
  Map<String, String> _headers;

dev4jam

final req = _PreparedNetworkRequest<Model>(
  request,
  parser,
  _dio!,
  {..._headers, ...(request.headers ?? {})},
  onSendProgress,
  onReceiveProgress,
);
final result = await compute(
  executeRequest<Model>,

dev4jam

Future<NetworkResponse<Model>> executeRequest<Model>(
  _PreparedNetworkRequest request,
) async {
  try {
    dynamic body = request.request.data.whenOrNull(
      json: (data) => data,
      text: (data) => data,
    );
    final response = await request.dio.request(
      request.request.path,

dev4jam

class _PreparedNetworkRequest<Model> {
  const _PreparedNetworkRequest(
    this.request,
    this.parser,
    this.dio,
    this.headers,
    this.onSendProgress,
    this.onReceiveProgress,
  );
  final NetworkRequest request;

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void addBasicAuth(String accessToken) {
  _headers['Authorization'] = 'Bearer $accessToken';
}

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try {
  final response = await _dio!.request(
    request.path,
    data: body,
    queryParameters: request.queryParams,
    options: Dio.Options(
      method: request.type.name,
      headers: {..._headers, ...(request.headers ?? {})}, // Combine all headers
    ),
    onSendProgress: onSendProgress,

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dynamic body = request.data.whenOrNull(
  json: (data) => data,
  text: (data) => data,
);

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class NetworkService {
  NetworkService({
    required this.baseUrl, // Base service url 
    dioClient, // Prepared Dio instance could be injected 
    httpHeaders, // Global headers could be provided as well
  })  : this._dio = dioClient,
        this._headers = httpHeaders ?? {};
  Dio? _dio;
  final String baseUrl;
  Map<String, String> _headers;

dev4jam

import 'package:freezed_annotation/freezed_annotation.dart';
part 'NetworkResponse.freezed.dart';
@freezed
class NetworkResponse<Model> with _$NetworkResponse {
  const factory NetworkResponse.ok(Model data) = Ok;
  const factory NetworkResponse.invalidParameters(String message) = InvalidParameters;
  const factory NetworkResponse.noAuth(String message) = NoAuth; //401
  const factory NetworkResponse.noAccess(String message) = NoAccess; //403
  const factory NetworkResponse.badRequest(String message) = BadRequest; //400
  const factory NetworkResponse.notFound(String message) = NotFound; //404