PIbd-21_Shanygin_A.V_BaseData/Hotel/HotelBusinessLogic/BusinessLogics/BookingLogic.cs

using HotelContracts.BindingModels;
using HotelContracts.BusinessLogicsContracts;
using HotelContracts.SearchModels;
using HotelContracts.StoragesContracts;
using HotelContracts.ViewModels;
using HotelDataModels.Enums;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HotelBusinessLogic.BusinessLogics
{
    public class BookingLogic : IBookingLogic
    {
        private readonly IBookingStorage _bookingStorage;

        public BookingLogic(IBookingStorage bookingStorage)
        {
            _bookingStorage = bookingStorage;
        }
        public BookingViewModel? ReadElement(BookingSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            var element = _bookingStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public List<BookingViewModel>? ReadList(BookingSearchModel? model)
        {
            var list = model == null ? _bookingStorage.GetFullList() : _bookingStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

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

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

        public bool Update(BookingBindingModel model)
        {
            CheckModel(model);
            if (_bookingStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }
        public bool TakeBookingInWork(BookingBindingModel model)
        {
            return ChangeStatus(model, AcceptanceStatus.Обработка);
        }

        public bool FinishBooking(BookingBindingModel model)
        {
            return ChangeStatus(model, AcceptanceStatus.Принимается);
        }

        public bool DeliveryBooking(BookingBindingModel model)
        {
            return ChangeStatus(model, AcceptanceStatus.Принят);
        }
        private void CheckModel(BookingBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.RoomId <= 0)
            {
                throw new ArgumentNullException("Некорректный идентификатор комнаты", nameof(model.RoomId));
            }
            if (model.ClientId <= 0)
            {
                throw new ArgumentNullException("Некорректный идентификатор клиента", nameof(model.ClientId));
            }
            
        }
        private bool ChangeStatus(BookingBindingModel model, AcceptanceStatus newStatus)
        {
            CheckModel(model, false);
            if (model.Status + 1 != newStatus)
            {
                return false;
            }
            model.Status = newStatus;
            if (_bookingStorage.Update(model) == null)
            {
                model.Status--;
                return false;
            }
            return true;
        }
    }
}