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

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

namespace SushiBarBusinessLogic
{
    public class PromotionLogic
    {
        private readonly PromotionStorage _promotionStorage;

        public PromotionLogic(PromotionStorage PromotionStorage)
        {
            _promotionStorage = PromotionStorage;
        }

        public List<PromotionViewModel>? ReadList(PromotionSearchModel? Model)
        {
            var List = Model is null ? _promotionStorage.GetFullList() : _promotionStorage.GetFilteredList(Model);

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

        public PromotionViewModel? ReadElement(PromotionSearchModel? Model)
        {
            if (Model is null)
                throw new ArgumentNullException(nameof(Model));

            var Element = _promotionStorage.GetElement(Model);

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

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

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

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