SUBD_SushiBar/SushiBar/SushiBarBusinessLogic/BusinessLogics/MenuLogic.cs

using SushiBarContracts.BindingModels;
using SushiBarContracts.BusinessLogicContracts;
using SushiBarContracts.SearchModels;
using SushiBarContracts.StoragesContracts;
using SushiBarContracts.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SushiBarBusinessLogic.BusinessLogics
{
    public class MenuLogic : IMenuLogic
    {
        private readonly IMenuStorage _menuStorage;

        public MenuLogic(IMenuStorage menuStorage)
        {
            _menuStorage = menuStorage;
        }
        public MenuViewModel? ReadElement(MenuSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            var element = _menuStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public List<MenuViewModel>? ReadList(MenuSearchModel? model)
        {
            var list = model == null ? _menuStorage.GetFullList() : _menuStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

        public bool Create(MenuBindingModel model)
        {
            CheckModel(model);
            if (_menuStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }

        public bool Delete(MenuBindingModel model)
        {
            CheckModel(model, false);
            if (_menuStorage.Delete(model) == null)
            {
                return false;
            }
            return true;
        }

        public bool Update(MenuBindingModel model)
        {
            CheckModel(model);
            if (_menuStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }

        private void CheckModel(MenuBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.FoodName))
            {
                throw new ArgumentNullException("Нет названия", nameof(model.FoodName));
            }
        }

        public void ClearEntity()
        {
            _menuStorage.ClearEntity();
        }
    }
}