adding metadata in response

pkg/gofr/handler.go

@@ -99,8 +99,6 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// Handle custom headers if 'result' is a 'Response'.
 	if resp, ok := result.(response.Response); ok {
 		resp.SetCustomHeaders(w)
-
-		result = resp.Data
 	}
 
 	// Handler function completed

pkg/gofr/http/responder.go

@@ -41,7 +41,12 @@ func (r Responder) Respond(data interface{}, err error) {
 			data = nil
 		}
 
-		resp = response{Data: data, Error: errorObj}
+		res, ok := data.(resTypes.Response)
+		if !ok {
+			resp = response{Data: data, Error: errorObj}
+		} else {
+			resp = res
+		}
 	}
 
 	r.w.Header().Set("Content-Type", "application/json")
@@ -91,8 +96,9 @@ func createErrorResponse(err error) map[string]interface{} {
 
 // response represents an HTTP response.
 type response struct {
-	Error interface{} `json:"error,omitempty"`
-	Data  interface{} `json:"data,omitempty"`
+	Error    interface{} `json:"error,omitempty"`
+	Metadata interface{} `json:"metadata,omitempty"`
+	Data     interface{} `json:"data,omitempty"`
 }
 
 type statusCodeResponder interface {

pkg/gofr/http/response/response.go

@@ -5,8 +5,9 @@ import (
 )
 
 type Response struct {
-	Data    any               `json:"data"`
-	Headers map[string]string `json:"-"`
+	Data     any               `json:"data"`
+	Metadata map[string]any    `json:"metadata,omitempty"`
+	Headers  map[string]string `json:"-"`
 }
 
 func (resp Response) SetCustomHeaders(w http.ResponseWriter) {