public MediatorResponse <FeedbackViewModel> SendFeedback(Guid?candidateId, FeedbackViewModel feedbackViewModel)
        {
            var validationResult = _feedbackServerViewModelValidator.Validate(feedbackViewModel);

            if (!validationResult.IsValid)
            {
                return(GetMediatorResponse(HomeMediatorCodes.SendFeedback.ValidationError, feedbackViewModel, validationResult));
            }

            if (_candidateServiceProvider.SendFeedback(candidateId, feedbackViewModel))
            {
                var viewModel = InternalGetFeedbackViewModel(candidateId);

                return(GetMediatorResponse(HomeMediatorCodes.SendFeedback.SuccessfullySent,
                                           viewModel, ApplicationPageMessages.SendFeedbackSucceeded, UserMessageLevel.Success));
            }

            return(GetMediatorResponse(HomeMediatorCodes.SendFeedback.Error, feedbackViewModel,
                                       ApplicationPageMessages.SendFeedbackFailed, UserMessageLevel.Warning));
        }