public BeerType GetTypeById(int id)
{
if (id <= 0)
{
throw new ArgumentException("Incorrect ID entered");
}
return(TypeRepository.ReadTypeById(id));
}
public Beer CreateBeer(Beer beer)
{
if (beer != null)
{
Validator.ValidateBeer(beer);
if (TypeRepository.ReadTypeById(beer.Type.ID) == null)
{
throw new InvalidOperationException("No type with such ID found");
}
if (BrandRepository.ReadBrandById(beer.Brand.ID) == null)
{
throw new InvalidOperationException("No brand with such ID found");
}
return(BeerRepository.AddBeer(beer));
}
return(null);
}
