Morozov_Pibd-32_KOP/VisEl/BusinessLogic/ProductBL.cs

using DatabaseImplement.Implements;
using DataContracts.bindingModels;
using DataContracts.BLs;
using DataContracts.searchModels;
using DataContracts.viewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BusinessLogic
{
    public class ProductBL : IProductBL
    {
        private readonly ProductStorage _productStorage = new();
        public bool Create(ProductBindingModel model)
        {
            CheckModel(model);
            if (_productStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }

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

        public ProductViewModel? ReadElement(ProductSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _productStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public List<ProductViewModel>? ReadList()
        {
            var list = _productStorage.GetFullList();
            if (list == null)
            {
                return null;
            }
            return list;
        }

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

        private void CheckModel(ProductBindingModel model, bool withParams =
       true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.title))
            {
                throw new ArgumentNullException("Нет имени клиента", nameof(model.title));
            }

        }

    }
}