fix(#45): insert parsed value back to the context

packages/serinus/bin/serinus.dart

@@ -115,8 +115,13 @@ class HomeController extends Controller {
     on(
       GetRoute(path: '/'),
       (context) async {
-        return Response.json([TestObj('Hello'), TestObj('World')]);
+        return Response.json([TestObj('Hello'), TestObj('World'), {'test': context.query['test']}]);
       },
+      schema: ParseSchema(
+        query: object({
+          'test': string().encode(),
+        }).optionals(['test'])
+      )
     );
     on(PostRoute(path: '/*'), (context) async {
       return Response.text(

packages/serinus/lib/src/core/parse_schema.dart

@@ -6,7 +6,7 @@ import '../exceptions/exceptions.dart';
 
 /// The [ParseSchema] class is used to define the schema of the parsing process.
 final class ParseSchema {
-  late AcanthisType _schema;
+  late AcanthisMap _schema;
 
   /// The [error] property contains the error that will be thrown if the parsing fails.
   final SerinusException Function(Map<String, dynamic>)? error;
@@ -29,7 +29,7 @@ final class ParseSchema {
   }
 
   /// The [tryParse] method is used to validate the data.
-  void tryParse({required Map<String, dynamic> value}) {
+  Map<String, dynamic> tryParse({required Map<String, dynamic> value}) {
     AcanthisParseResult? result;
     try {
       result = _schema.tryParse(value);
@@ -40,5 +40,6 @@ final class ParseSchema {
       throw error?.call(result.errors) ??
           BadRequestException(message: jsonEncode(result.errors));
     }
+    return result.value;
   }
 }

packages/serinus/lib/src/handlers/request_handler.dart

@@ -75,13 +75,19 @@ class RequestHandler extends Handler {
         buildRequestContext(scopedProviders, wrappedRequest);
     await route.transform(context);
     if (schema != null) {
-      schema.tryParse(value: {
+      final result = schema.tryParse(value: {
         'body': wrappedRequest.body?.value,
         'query': wrappedRequest.query,
         'params': wrappedRequest.params,
         'headers': wrappedRequest.headers,
         'session': wrappedRequest.session.all,
       });
+      wrappedRequest.headers.addAll(result['headers']);
+      wrappedRequest.params.addAll(result['params']);
+      wrappedRequest.query.addAll(result['query']);
+      for(final key in result['session'].keys) {
+        wrappedRequest.session.put(key, result['session'][key]);
+      }
     }
     final middlewares = injectables.filterMiddlewaresByRoute(
         routeData.path, wrappedRequest.params);