public HttpResponseMessage AddAddressBookEntry(AddAddressCommandParameters parameters) { try { Logger.Trace("AddAddressBookEntry started through Web API"); if (parameters == null) { const string nullParametersErrorMsg = "AddAddressBookEntry called with null parameters"; Logger.Info(nullParametersErrorMsg); return(Request.CreateResponse(HttpStatusCode.BadRequest, new AddAddressBookEntryResult { Error = nullParametersErrorMsg })); } if (!ModelState.IsValid) { var errors = ModelState.Values.SelectMany(v => v.Errors.Select(e => e.ErrorMessage)).ToList(); Logger.Info("AddAddressBookEntry called with invalid parameters: {0}", string.Join(", ", errors)); return(Request.CreateResponse(HttpStatusCode.BadRequest, new AddAddressBookEntryResult { ValidationErrors = errors })); } var canAddAddresses = Authorization.IsAuthorized(UserId, ActivityEnum.Add); if (!canAddAddresses) { return(Request.CreateResponse(HttpStatusCode.Forbidden)); } var result = _addressBookService.AddAddressBookEntry(parameters); switch (result.ResultType) { case AddressBookCommandResultType.Duplicate: Logger.Trace(result.Error); return(Request.CreateResponse(HttpStatusCode.BadRequest, "Duplicate address book entry found.")); case AddressBookCommandResultType.Error: Logger.Error("AddAddressBookEntry failed with error: {0}", result.Error); return(Request.CreateResponse(HttpStatusCode.InternalServerError, "Unexpected server error")); } Logger.Trace("AddAddressBookEntry creating response"); return(Request.CreateResponse(HttpStatusCode.OK, result.NewAddressBookEntry)); } catch (Exception ex) { Logger.Error(ex, "AddAddressBookEntry failed"); return(Request.CreateResponse(HttpStatusCode.InternalServerError, "Unexpected server error")); } }