PIbd22_NikiforovaMV_AutomobilePlant/AutomobilePlantDatabaseImplement/Implements/OrderStorage.cs

using AutomobilePlantContracts.BindingModels;
using AutomobilePlantContracts.SearchModels;
using AutomobilePlantContracts.StorageContracts;
using AutomobilePlantContracts.ViewModels;
using AutomobilePlantDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AutomobilePlantDatabaseImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            using var context = new AutomobilePlantDatabase();
            return context.Orders
                    .Include(x => x.Car)
                    .Include(x => x.Client)
                    .Include(x => x.Implementer)
                    .FirstOrDefault(x =>
						(model.Status == null || model.Status != null && model.Status.Equals(x.Status)) &&
						model.ImplementerId.HasValue && x.ImplementerId == model.ImplementerId ||
                        model.Id.HasValue && x.Id == model.Id)?.GetViewModel;
        }

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

        public List<OrderViewModel> GetFullList()
        {
            using var context = new AutomobilePlantDatabase();
            return context.Orders.Include(x => x.Car).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 AutomobilePlantDatabase();
            context.Orders.Add(newOrder);
            context.SaveChanges();
			return context.Orders.Include(x => x.Car).Include(x => x.Client).Include(x => x.Implementer).FirstOrDefault(x => x.Id == newOrder.Id)?.GetViewModel;
		}

        public OrderViewModel? Update(OrderBindingModel model)
        {
            using var context = new AutomobilePlantDatabase();
            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.Car).Include(x => x.Client).Include(x => x.Implementer).FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
        }
        public OrderViewModel? Delete(OrderBindingModel model)
        {
            using var context = new AutomobilePlantDatabase();
            var element = context.Orders
				.Include(x => x.Car)
				.Include(x => x.Client)
                .Include(x => x.Implementer)
                .FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                context.Orders.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}