create db update message function

api/message.go

@@ -64,11 +64,19 @@ func EditMessage(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "Message body cannot be empty", http.StatusBadRequest)
 		return
 	}
+
 	message.Body = body
-	dbDeleteMessage(message.ID)
 	message.Edited = time.Now()
-	err = dbAddMessage(message)
+
+	err = dbUpdateMessage(message)
 	if err != nil {
+		render.Render(w, r, ErrRender(err))
+		return
+	}
+
+	if err := render.Render(w, r, NewMessageResponse(message)); err != nil {
+		render.Render(w, r, ErrRender(err))
+		return
 	}
 }