PIbd31.Lyovushkina_COP32_2/WinFormUchetLab/UchetLabBusinessLogic/BusinessLogic/CheckerLogic.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UchetLabContracts.BindingModels;
using UchetLabContracts.BusinessLogicsContracts;
using UchetLabContracts.SearchModels;
using UchetLabContracts.StorageContracts;
using UchetLabContracts.ViewModels;

namespace UchetLabBusinessLogic.BusinessLogic
{
    public class CheckerLogic : ICheckerLogic
    {
        ICheckerStorage _checkerStorage;

        public CheckerLogic(ICheckerStorage checkerStorage)
        {
            _checkerStorage = checkerStorage;
        }

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

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

        public CheckerViewModel? ReadElement(CheckerSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _checkerStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public List<CheckerViewModel>? ReadList(CheckerSearchModel? model)
        {
            var list = model == null ? _checkerStorage.GetFullList() : _checkerStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

        public bool Update(CheckerBindingModel model)
        {
            CheckModel(model);
            if (_checkerStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }
        private void CheckModel(CheckerBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.FIO))
            {
                throw new ArgumentNullException("проверяющий не указан", nameof(model.FIO));
            }
        }
    }
}