SUBD_PIbd-21_Balberova_D.N./BeautySaloon/BeautySaloonBusinessLogic/OrderLogic.cs

using BeautySaloonContracts.BindingModels;
using BeautySaloonContracts.BusinessLogicsContracts;
using BeautySaloonContracts.SearchModels;
using BeautySaloonContracts.StoragesContracts;
using BeautySaloonContracts.ViewModels;

namespace BeautySaloonBusinessLogic
{
    public class OrderLogic : IOrderLogic
    {
        private readonly IOrderStorage _orderStorage;
        public OrderLogic(IOrderStorage orderStorage)
        {
            _orderStorage = orderStorage;
        }
        public bool CreateOrder(OrderBindingModel model)
        {
            CheckModel(model);
            if (_orderStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }

        public OrderViewModel? ReadElement(OrderSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _orderStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public List<OrderViewModel>? ReadList(OrderSearchModel? model)
        {
            var list = model == null ? _orderStorage.GetFullList() :
                _orderStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

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

        private void CheckModel(OrderBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.Sum <= 0)
            {
                throw new ArgumentNullException("Сумма заказа должна быть больше 0", nameof(model.Sum));
            }
            if (model.ClientId <= 0)
            {
                throw new ArgumentNullException("Некорректный идентификатор клиента",
                    nameof(model.ClientId));
            }
            if (model.EmployeeId <= 0)
            {
                throw new ArgumentNullException("Некорректный идентификатор сотрудника",
                    nameof(model.ClientId));
            }
        }
    }
}