public List <Coffee> GetFilteredCoffee(Filter filter)
{
if (filter.CurrentPage < 0 || filter.ItemsPerPage < 0)
{
throw new InvalidDataException("Current Page and Items Per Page must be 0 or higher!");
}
if ((filter.CurrentPage - 1 * filter.ItemsPerPage) >= _coffeeRepo.Count())
{
throw new InvalidDataException("CurrentPage is set too high!");
}
return(_coffeeRepo.ReadAll(filter).ToList());
}