ISEbd-21_Putilin_P.A._PrecastConcretePlant/PrecastConcretePlant/PrecastConcretePlantDatabaseImplement/OrderStorage.cs

using Microsoft.EntityFrameworkCore;
using PrecastConcretePlantContracts.BindingModels;
using PrecastConcretePlantContracts.SearchModels;
using PrecastConcretePlantContracts.StoragesContract;
using PrecastConcretePlantContracts.ViewModels;
using PrecastConcretePlantDatabaseImplement.Models;

namespace PrecastConcretePlantDatabaseImplement
{
    public class OrderStorage : IOrderStorage
    {

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            if (!model.Id.HasValue)
            {
                return null;
            }
            return context.Orders.Include(x => x.Reinforced).FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
        }

        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            if (!model.Id.HasValue && model.DateFrom.HasValue && model.DateTo.HasValue)
            {
                return context.Orders
                    .Where(x => model.DateFrom <= x.DateCreate.Date && x.DateCreate <= model.DateTo).Include(x => x.Reinforced)
                    .Select(x => x.GetViewModel)
                    .ToList();
            }
            var result = GetElement(model);
            return result != null ? new() { result } : new();
        }

        public List<OrderViewModel> GetFullList()
        {
            using var context = new PrecastConcretePlantDatabase();
            return context.Orders
                .Include(x => x.Reinforced)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public OrderViewModel? Insert(OrderBindingModel model)
        {
            var newOrder = Order.Create(model);
            if (newOrder == null)
            {
                return null;
            }
            using var context = new PrecastConcretePlantDatabase();
            context.Orders.Add(newOrder);
            context.SaveChanges();
            return newOrder.GetViewModel;
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            var order = context.Orders.Include(x => x.Reinforced).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 PrecastConcretePlantDatabase();
            var element = context.Orders.Include(x => x.Reinforced).FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                context.Orders.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}