SUBD/CarRentBusinessLogic/BusinessLogics/ClientLogic.cs

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

namespace ClientRentBusinessLogic.BusinessLogics
{
	public class ClientLogic : IClientLogic
	{
		private readonly IClientStorage _ClientStorage;
		public ClientLogic(IClientStorage ClientStorage)
		{
			_ClientStorage = ClientStorage;
		}
		public List<ClientViewModel>? ReadList(ClientSearchModel? model)
		{
			var list = model == null ? _ClientStorage.GetFullList() :
								   _ClientStorage.GetFilteredList(model);
			if (list == null)
			{
				return null;
			}
			return list;
		}
		public ClientViewModel? ReadElement(ClientSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			var element = _ClientStorage.GetElement(model);
			if (element == null)
			{
				return null;
			}
			return element;
		}
		public bool Create(ClientBindingModel model)
		{
			CheckModel(model);
			if (_ClientStorage.Insert(model) == null)
			{
				return false;
			}
			return true;
		}
		public bool Update(ClientBindingModel model)
		{
			CheckModel(model);
			if (_ClientStorage.Update(model) == null)
			{
				return false;
			}
			return true;
		}
		public bool Delete(ClientBindingModel model)
		{
			CheckModel(model, false);
			if (_ClientStorage.Delete(model) == null)
			{
				return false;
			}
			return true;
		}
		private void CheckModel(ClientBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}
			if (!withParams)
			{
				return;
			}
			if (string.IsNullOrEmpty(model.Name))
			{
				throw new ArgumentNullException("Нет имени клиента",
			   nameof(model.Name));
			}
			if (string.IsNullOrEmpty(model.Surname))
			{
				throw new ArgumentNullException("Нет фамилии клиента",
			   nameof(model.Surname));
			}
			if (string.IsNullOrEmpty(model.PhoneNumber))
			{
				throw new ArgumentNullException("Нет номера телефона клиента",
			   nameof(model.PhoneNumber));
			}
			if (string.IsNullOrEmpty(model.Email))
			{
				throw new ArgumentNullException("Нет адреса электронной почты клиента",
			   nameof(model.Email));
			}
			if (string.IsNullOrEmpty(model.DriveLicenseNumber))
			{
				throw new ArgumentNullException("Нет водительских прав клиента",
			   nameof(model.DriveLicenseNumber));
			}

			var element = _ClientStorage.GetElement(
				new ClientSearchModel
				{
					DriveLicenseNumber = model.DriveLicenseNumber
				}
			);
			if (element != null && element.Id != model.Id)
			{
				throw new InvalidOperationException("Клиент с такими водительскими правами уже есть");
			}
		}
	}
}