PIbd-23_Starostin_I.K._ShipYard/ShipyardDatabaseImplement/OrderStorage.cs

using Microsoft.EntityFrameworkCore;
using ShipyardContracts.BindingModels;
using ShipyardContracts.SearchModels;
using ShipyardContracts.StoragesContracts;
using ShipyardContracts.ViewModels;
using ShipyardDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ShipyardDatabaseImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        public List<OrderViewModel> GetFullList()
        {
            using var context = new ShipyardDataBase();
            return context.Orders
            .Include(x => x.Ship).Select(x => x.GetViewModel)
            .ToList();
        }
        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            using var context = new ShipyardDataBase();
            return context.Orders
            .Where(x => (
                            (!model.Id.HasValue || x.Id == model.Id) &&
                            (!model.DateFrom.HasValue || x.DateCreate >= model.DateFrom) &&
                            (!model.DateTo.HasValue || x.DateCreate <= model.DateTo)
                        )
                    )
            .Include(x => x.Ship)
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new ShipyardDataBase();
            return context.Orders.Include(x => x.Ship).FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
        }
        public OrderViewModel? Insert(OrderBindingModel model)
        {
            using var context = new ShipyardDataBase();
            var newOrder = Order.Create(model, context);
            if (newOrder == null)
            {
                return null;
            }
            context.Orders.Add(newOrder);
            context.SaveChanges();
            return newOrder.GetViewModel;
        }
        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new ShipyardDataBase();
            var order = context.Orders.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 ShipyardDataBase();
            var element = context.Orders.FirstOrDefault(rec => rec.Id ==
            model.Id);
            if (element != null)
            {
                context.Orders.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}