public ActionResult Evaluate(int id, EvaluateViewModel model, User user, string btnSend,
            string btnAccept, string btnDecline, string btnBack)
        {
            Suggestion suggestion = _suggestionRepository.FindBy(id);

            var student = suggestion.Student;


            if (ModelState.IsValid)
            {
                try
                {
                    var promotor = (Promotor)user;



                    if (btnSend != null)
                    {
                        promotor.GiveFeedback(model.Suggestion.Feedback, student, suggestion, "");
                        TempData["Success"] = "Uw feedback is verzonden";
                    }

                    if (btnAccept != null)
                    {
                        promotor.GiveFeedback(model.Suggestion.Feedback, student, suggestion, btnAccept);
                        //notifieer stakeholder
                        TempData["Success"] = "Het voorstel is geaccepteerd";

                    }

                    if (btnDecline != null)
                    {
                        promotor.SuggestionDoesNotComply(student, suggestion);
                        //notifieer stakeholder
                        TempData["Success"] = "Het voorstel is afgekeurd";
                    }

                    _suggestionRepository.SaveChanges();

                    if (btnBack != null)
                    {
                        return RedirectToAction("Index", "Suggestion");
                    }

                }
                catch (ApplicationException e)
                {
                    ModelState.AddModelError("", e.Message); // shows in summary
                }
            }
            TempData["Error"] = "Uw verzoek is niet gelukt";
            return View();
        }
        //public ActionResult Suggestions(int id)
        //{
        //    IEnumerable<Suggestion> suggestions = _suggestionRepository.FindByUser(id).ToList();
        //    return View();
        //}

        public ActionResult Evaluate(int id)
        {

            Suggestion suggestion = _suggestionRepository.FindBy(id);
            EvaluateViewModel suggestionViewModel = new EvaluateViewModel()
            {
                Suggestion = new SuggestionViewModel()
                {
                    Id = suggestion.Id,
                    Context = suggestion.Context,
                    Goal = suggestion.Goal,
                    Keywords = suggestion.Keywords,
                    Motivation = suggestion.Motivation,
                    References = suggestion.References,
                    Subject = suggestion.Subject,
                    ResearchQuestion = suggestion.ResearchQuestion,
                    Title = suggestion.Title
                }
            };

            return View(suggestionViewModel);
        }