PIbd-22_Shabunov_O.A._SushiBar/SushiBarBusinessLogic/DishLogic.cs

using SushiBarContracts.BindingModels;
using SushiBarContracts.SearchModels;
using SushiBarContracts.ViewModels;
using SushiBarDatabaseImplement.Storages;

namespace SushiBarBusinessLogic
{
    public class DishLogic
    {
        private readonly DishStorage _dishStorage;

        public DishLogic(DishStorage DishStorage)
        {
            _dishStorage = DishStorage;
        }

        public List<DishViewModel>? ReadList(DishSearchModel? Model)
        {
            var List = Model is null ? _dishStorage.GetFullList() : _dishStorage.GetFilteredList(Model);

            if (List is null)
            {
                return null;
            }
            return List;
        }

        public DishViewModel? ReadElement(DishSearchModel? Model)
        {
            if (Model is null)
                throw new ArgumentNullException(nameof(Model));

            var Element = _dishStorage.GetElement(Model);

            if (Element is null)
            {
                return null;
            }
            return Element;
        }

        public bool Create(DishBindingModel Model)
        {
            if (_dishStorage.Insert(Model) is null)
            {
                return false;
            }
            return true;
        }

        public bool Update(DishBindingModel Model)
        {
            if (_dishStorage.Update(Model) is null)
            {
                return false;
            }
            return true;
        }

        public bool Delete(DishBindingModel Model)
        {
            if (_dishStorage.Delete(Model) is null)
            {
                return false;
            }
            return true;
        }
    }
}