feat(http): implements doublelinked list for middlewares

packages/wyatt_http_client/lib/src/middleware.dart

@@ -14,60 +14,27 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-import 'package:http/http.dart';
-import 'package:wyatt_http_client/src/middleware_client.dart';
-import 'package:wyatt_http_client/src/models/middleware_request.dart';
-import 'package:wyatt_http_client/src/models/middleware_response.dart';
+part of 'pipeline.dart';
 
 class Middleware {
-  Middleware? child;
-
+  /// The http [MiddlewareClient] used by this [Middleware]
   MiddlewareClient? _client;
 
-  Middleware({
-    this.child,
-  });
+  String getName() => 'MiddlewareNode';
 
-  Middleware._({
-    this.child,
-    MiddlewareClient? client,
-  }) : _client = client;
+  // ignore: avoid_setters_without_getters
+  set httpClient(MiddlewareClient? client) => _client = client;
 
-  String getName() => 'Middleware';
+  Client? get client => _client?.inner;
 
-  void setClient(MiddlewareClient? client) {
-    _client = client;
-    child?.setClient(client);
-  }
-
-  Client? getClient() {
-    return _client?.inner;
-  }
-
-  Middleware deepCopy() {
-    if (child != null) {
-      return Middleware._(child: child?.deepCopy(), client: _client);
-    } else {
-      return Middleware._(client: _client);
-    }
-  }
-
-  void addChild(Middleware middleware) {
-    if (child != null) {
-      child?.addChild(middleware);
-    } else {
-      child = middleware;
-    }
-  }
-
-  MiddlewareRequest onRequest(
+  Future<MiddlewareRequest> onRequest(
     MiddlewareRequest request,
-  ) {
-    return child?.onRequest(request) ?? request;
+  ) async {
+    return request;
   }
 
-  MiddlewareResponse onResponse(MiddlewareResponse response) {
-    return child?.onResponse(response) ?? response;
+  Future<MiddlewareResponse> onResponse(MiddlewareResponse response) async {
+    return response;
   }
 
   @override