PIbd-22_Puchkina_A.A_TravelCompany/TravelCompany/TravelCompanyDatabaseImplement/Implements/OrderStorage.cs

using Microsoft.EntityFrameworkCore;
using TravelCompanyContracts.BindingModels;
using TravelCompanyContracts.SearchModels;
using TravelCompanyContracts.StoragesContracts;
using TravelCompanyContracts.ViewModels;
using TravelCompanyDatabaseImplement.Models;

namespace TravelCompanyDatabaseImplement.Implements
{
	public class OrderStorage : IOrderStorage
    {
        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            if (!model.Id.HasValue && !model.ImplementerId.HasValue)
            {
                return null;
            }

            using var context = new TravelCompanyDataBase();

            return context.Orders
                .Include(x => x.Travel)
				.Include(x => x.Client)
				.Include(x => x.Implementer)
					.FirstOrDefault(x =>
						model.ImplementerId.HasValue && x.ImplementerId == model.ImplementerId && model.Status != null && x.Status.Equals(model.Status)
						|| model.Status == null && model.ImplementerId.HasValue && x.ImplementerId == model.ImplementerId
						|| model.Id.HasValue && x.Id == model.Id)
				?.GetViewModel;
        }

        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
			using var context = new TravelCompanyDataBase();
			if (model.Id.HasValue)
			{
				return context.Orders
					.Include(x => x.Travel)
					.Include(x => x.Client)
					.Include(x => x.Implementer)
					.Where(x => x.Id == model.Id)
					.Select(x => x.GetViewModel)
					.ToList();
			}
			else if (model.DateFrom != null && model.DateTo != null)
			{
				return context.Orders
					.Include(x => x.Travel)
					.Include(x => x.Client)
					.Include(x => x.Implementer)
					.Where(x => x.DateCreate >= model.DateFrom && x.DateCreate <= model.DateTo)
					.Select(x => x.GetViewModel)
					.ToList();
			}
			else if (model.ClientId.HasValue)
			{
				return context.Orders
					.Include(x => x.Travel)
					.Include(x => x.Client)
					.Include(x => x.Implementer)
					.Where(x => x.ClientId == model.ClientId)
					.Select(x => x.GetViewModel)
					.ToList();
			}
			else if (model.ImplementerId.HasValue)
			{
				return context.Orders
					.Include(x => x.Travel)
					.Include(x => x.Client)
					.Include(x => x.Implementer)
					.Where(x => x.ImplementerId == model.ImplementerId)
					.Select(x => x.GetViewModel)
					.ToList();
			}
			else if (model.Status != null)
			{
				return context.Orders
					.Include(x => x.Travel)
					.Include(x => x.Client)
					.Include(x => x.Implementer)
					.Where(x => x.Status.Equals(model.Status))
					.Select(x => x.GetViewModel)
					.ToList();
			}
			return new();
		}

        public List<OrderViewModel> GetFullList()
        {
            using var context = new TravelCompanyDataBase();

            return context.Orders
                .Include(x => x.Travel)
				.Include(x => x.Client)
				.Include(x => x.Implementer)
				.Select(x => x.GetViewModel)
                .ToList();
        }

        public OrderViewModel? Insert(OrderBindingModel model)
        {
            var newOrder = Order.Create(model);

            if (newOrder == null)
            {
                return null;
            }

            using var context = new TravelCompanyDataBase();
            context.Orders.Add(newOrder);
            context.SaveChanges();

            return context.Orders
                .Include(x => x.Travel)
				.Include(x => x.Client)
				.Include(x => x.Implementer)
				.FirstOrDefault(x => x.Id == newOrder.Id)?
				.GetViewModel;
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new TravelCompanyDataBase();
            var order = context.Orders.FirstOrDefault(x => x.Id == model.Id);

            if (order == null)
            {
                return null;
            }

            order.Update(model);
            context.SaveChanges();

            return context.Orders
                .Include(x => x.Travel)
				.Include(x => x.Client)
				.Include(x => x.Implementer)
				.FirstOrDefault(x => x.Id == model.Id)?
				.GetViewModel;
        }

        public OrderViewModel? Delete(OrderBindingModel model)
        {
            using var context = new TravelCompanyDataBase();
            var element = context.Orders.FirstOrDefault(rec => rec.Id == model.Id);

            if (element != null)
            {
				var deletedElement = context.Orders
										   .Include(x => x.Travel)
										   .Include(x => x.Client)
										   .Include(x => x.Implementer)
										   .FirstOrDefault(x => x.Id == model.Id)
										   ?.GetViewModel;
				context.Orders.Remove(element);
                context.SaveChanges();

                return deletedElement;
            }

            return null;
        }
    }
}