PIbd-32.-Stroev-V.M.-COP/WinFormsLibrary1/Businesslogic/BusinessLogics/CategoryLogic.cs

using Contracts.BindingModels;
using Contracts.BusinessLogicContracts;
using Contracts.SearchModels;
using Contracts.StorageContracts;
using Contracts.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BusinessLogics.BusinessLogics
{
    public class CategoryLogic : ICategoryLogic
    {
        private readonly ICategoryStorage _categoryStorage;

        public CategoryLogic(ICategoryStorage categoryStorage)
        {
            _categoryStorage = categoryStorage;
        }

        public List<CategoryViewModel> ReadList()
        {
            return _categoryStorage.GetFullList();
        }

        public bool Create(CategoryBindingModel model)
        {
            CheckModel(model);
            if (_categoryStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }
        public bool Update(CategoryBindingModel model)
        {
            CheckModel(model);
            if (_categoryStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }

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

        private void CheckModel(CategoryBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
        }
    }
}