PIbd-23_Leonteva_V._A._LawFirm/LawFirm/LawFirmDatabaseImplement/Implements/OrderStorage.cs

using LawFirmContracts.BindingModels;
using LawFirmContracts.SearchModels;
using LawFirmContracts.StoragesContracts;
using LawFirmContracts.ViewModels;
using LawFirmDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;

namespace LawFirmDatabaseImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            using var context = new LawFirmDatabase();
            if (model.Id.HasValue)
            {
                return context.Orders
                    .Include(x => x.Document)
                    .Include(x => x.Client)
                    .Include(x => x.Implementer)
                    .FirstOrDefault(x => x.Id == model.Id)
                    ?.GetViewModel;
            }
            if (model.ImplementerId.HasValue && model.OrderStatus.HasValue)
            {
                return context.Orders
                    .Include(x => x.Document)
                    .Include(x => x.Client)
                    .Include(x => x.Implementer)
                    .FirstOrDefault(x => x.ImplementerId == model.ImplementerId && x.Status == model.OrderStatus)
                    ?.GetViewModel;
            }
            return null;
        }
        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
			using var context = new LawFirmDatabase();
			if (model.Id.HasValue)
			{
				return context.Orders
					.Include(x => x.Document)
					.Include(x => x.Client)
					.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.Document)
					.Include(x => x.Client)
					.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.Document)
					.Include(x => x.Client)
					.Where(x => x.ClientId == model.ClientId)
					.Select(x => x.GetViewModel)
					.ToList();
			}
            else if (model.OrderStatus.HasValue)
            {
                return context.Orders
                        .Include(x => x.Document)
                        .Include(x => x.Client)
                        .Include(x => x.Implementer)
                        .Where(x => x.Status == model.OrderStatus)
                        .Select(x => x.GetViewModel)
                        .ToList();
            }
            else
			{
                return new();
            }
        }
        public List<OrderViewModel> GetFullList()
        {
            using var context = new LawFirmDatabase();
            return context.Orders.Include(x => x.Document).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 LawFirmDatabase();
            context.Orders.Add(newOrder);
            context.SaveChanges();
            return context.Orders.Include(x => x.Document).Include(x => x.Client).FirstOrDefault(x => x.Id == newOrder.Id)?.GetViewModel;
        }
        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new LawFirmDatabase();
            var order = context.Orders.Include(x => x.Client).Include(x => x.Implementer).Include(x => x.Document).FirstOrDefault(x => x.Id == model.Id);
            if (order == null)
            {
                return null;
            }
            order.Update(model);
            context.SaveChanges();
            return order.GetViewModel;
        }
        public OrderViewModel? Delete(OrderBindingModel model)
        {
            using var context = new LawFirmDatabase();
            var element = context.Orders.Include(x => x.Client).Include(x => x.Implementer).Include(x => x.Document).FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
				var deletedElement = context.Orders
				    .Include(x => x.Document)
				    .FirstOrDefault(x => x.Id == model.Id)
				    ?.GetViewModel;
				context.Orders.Remove(element);
				context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}