private bool Validate(DishAddDTO dishAddDTO, ref string message)
{
bool isValid = true;
string name = dishAddDTO.Name;
string categoryName = dishAddDTO.CategoryName;
decimal price = dishAddDTO.Price;
if (String.IsNullOrEmpty(name))
{
isValid = false;
message = "Dish's name cannot be empty";
}
if (name.Length > 40)
{
isValid = false;
message = "Dish's name cannot be more then 40 symbols";
}
else if (String.IsNullOrEmpty(categoryName))
{
isValid = false;
message = "Dish's category's name cannot be empty";
}
else if (price < 0)
{
isValid = false;
message = "Dish's price cannot be less then 0";
}
else if (unitOfWork.Dishes.GetAll().Any(dish => dish.Name == name))
{
isValid = false;
message = "Dish with such name already exists";
}
return(isValid);
}
private void RaiseDishAddedEvent(DishAddDTO dish)
{
var handler = DishAdded;
if (handler != null)
{
GenericEventArgs <DishAddDTO> e = new GenericEventArgs <DishAddDTO>(dish);
handler(this, e);
}
}
public DishAddViewModel(IControllerFactory factory, ICategorySubject subject)
{
this.factory = factory;
this.dish = new DishAddDTO();
this.SaveCommand = new DelegateCommand(Save, CanSave);
this.Categories = new ObservableCollection <CategoryDisplayDTO>();
subject.Subscribe(this);
Update();
}
private void OnAdd(DishAddDTO dish, DishAddViewModel viewModel)
{
using (IDishController controller = factory.CreateDishController())
{
ControllerMessage controllerMessage = controller.Add(dish);
if (controllerMessage.IsSuccess)
{
viewModel.Name = String.Empty;
viewModel.Price = 0;
Notify();
}
else
{
MessageBox.Show(controllerMessage.Message);
}
}
}
public ControllerMessage Add(DishAddDTO dishAddDTO)
{
string message = String.Empty;
bool success = Validate(dishAddDTO, ref message);
if (success)
{
try
{
CategoryEntity category = unitOfWork.Categories.Get(dishAddDTO.CategoryName);
if (category != null)
{
DishEntity dishEntity = new DishEntity
{
Name = dishAddDTO.Name,
Price = dishAddDTO.Price,
Category = category
};
unitOfWork.Dishes.Add(dishEntity);
unitOfWork.Commit();
message = "Dish added";
}
else
{
success = false;
message = "Category not found";
}
}
catch (Exception ex)
{
success = false;
message = ExceptionMessageBuilder.BuildMessage(ex);
}
}
return(new ControllerMessage(success, message));
}