Designed an interface for the REST network requests

network/lib/rest/client/dio_client.dart

@@ -0,0 +1,54 @@
+import 'package:dio/dio.dart';
+import 'package:network/rest/client/rest_client.dart';
+import 'package:network/rest/di/di.dart';
+
+class DioClient implements RestClient{
+
+  final _dio = getIt.get<Dio>();
+
+  @override
+  Future<dynamic> get(String url, {Map<String, dynamic>? queryParameters}) async {
+    try {
+      final response = await _dio.get(url, queryParameters: queryParameters);
+      return response.data;
+    } on DioException catch (e) {
+      return _handleError(e);
+    }
+  }
+
+  @override
+  Future<dynamic> post(String url, {data, Map<String, dynamic>? queryParameters}) async {
+    try {
+      final response = await _dio.post(url, data: data, queryParameters: queryParameters);
+      return response.data;
+    } on DioException catch (e) {
+      return _handleError(e);
+    }
+  }
+
+  @override
+  Future<dynamic> put(String url, {data, Map<String, dynamic>? queryParameters}) async {
+    try {
+      final response = await _dio.put(url, data: data, queryParameters: queryParameters);
+      return response.data;
+    } on DioException catch (e) {
+      return _handleError(e);
+    }
+  }
+
+  @override
+  Future<dynamic> delete(String url, {Map<String, dynamic>? queryParameters}) async {
+    try {
+      final response = await _dio.delete(url, queryParameters: queryParameters);
+      return response.data;
+    } on DioException catch (e) {
+      return _handleError(e);
+    }
+  }
+
+  // Error handling function
+  dynamic _handleError(DioException e) {
+    // TODO handle exception
+  }
+
+}

network/lib/rest/client/dio_provider.dart

@@ -0,0 +1,16 @@
+import 'package:dio/dio.dart';
+
+class DioProvider {
+  Dio createDio() {
+    Dio dio = Dio();
+
+    dio.options.baseUrl = "https://api.example.com";
+    dio.options.connectTimeout = const Duration(seconds: 10);
+    dio.options.receiveTimeout = const Duration(seconds: 10);
+    dio.options.headers = {
+      'Content-Type': 'application/json',
+    };
+    //TODO add interceptors
+    return dio;
+  }
+}

network/lib/rest/client/interceptor/token_interceptor.dart

@@ -0,0 +1,29 @@
+import 'package:dio/dio.dart';
+
+class TokenInterceptor implements InterceptorsWrapper{
+  final Future<String> Function() tokenProvider;
+
+  TokenInterceptor({required this.tokenProvider});
+
+  @override
+  void onError(DioException err, ErrorInterceptorHandler handler) {
+    return handler.next(err);
+  }
+
+  @override
+  void onRequest(RequestOptions options, RequestInterceptorHandler handler) async {
+    final token = await tokenProvider();
+
+    if (token.isNotEmpty) {
+      options.headers['Authorization'] = 'Bearer $token';
+    }
+
+    return handler.next(options);
+  }
+
+  @override
+  void onResponse(Response response, ResponseInterceptorHandler handler) {
+    return handler.next(response);
+  }
+
+}

network/lib/rest/client/rest_client.dart

@@ -0,0 +1,12 @@
+abstract class RestClient{
+
+  Future<dynamic> get(String url, {Map<String, dynamic>? queryParameters});
+  Future<dynamic> post(String url, {dynamic data, Map<String, dynamic>? queryParameters});
+  Future<dynamic> put(String url, {dynamic data, Map<String, dynamic>? queryParameters});
+  Future<dynamic> delete(String url, {Map<String, dynamic>? queryParameters});
+
+  //dynamic multipart();
+
+  //void addInterceptor();
+  //void deleteInterceptor();
+}

network/lib/rest/client/token_provider.dart

@@ -0,0 +1,9 @@
+
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
+const _storage = FlutterSecureStorage();
+
+Future<String> tokenProvider() async {
+  final token = await _storage.read(key: 'auth_token');
+  return token ?? '';
+}

network/lib/rest/di/di.dart

@@ -0,0 +1,9 @@
+import 'package:dio/dio.dart';
+import 'package:get_it/get_it.dart';
+import 'package:network/rest/client/dio_provider.dart';
+
+final getIt = GetIt.I;
+
+void setup() {
+  getIt.registerLazySingleton<Dio>(() => DioProvider().createDio());
+}

network/pubspec.yaml

@@ -14,6 +14,7 @@ dependencies:
 
   dio: ^5.6.0
   get_it: 7.7.0
+  flutter_secure_storage: ^9.2.2
 
 dev_dependencies:
   flutter_test: