// ***************** handlers ****************


        #region requests handlers

        private void editAmountHandler(JObject msgObj, string message)
        {
            JsonResponse response;
            int          requestId = (int)msgObj["id"];
            int          storeId   = (int)msgObj["data"]["storeId"];
            int          productId = (int)msgObj["data"]["productId"];
            int          amount    = (int)msgObj["data"]["amount"];


            try
            {
                response = user.SetProductAmountInBasket(storeId, productId, amount) ?
                           JsonResponse.generateActionSucces(requestId) : JsonResponse.generateActionError(requestId, "failed to change product amount");
            }
            catch (WorkShopDbException dbExc)
            {
                throw dbExc;
            }
            catch (Exception e)
            {
                response = JsonResponse.generateActionError(requestId, e.Message);
            }

            sendMyselfAMessage(JsonHandler.SerializeObject(response));
        }