PIbd-21_Medvedkov_Coursach/ComputerShopDatabaseImplement/Implements/UserStorage.cs

using ComputerShopContracts.BindingModels;
using ComputerShopContracts.SearchModels;
using ComputerShopContracts.StorageContracts;
using ComputerShopContracts.ViewModels;
using ComputerShopDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ComputerShopDatabaseImplement.Implements
{
	public class UserStorage : IUserStorage
	{
		public List<UserViewModel> GetFullList()
		{
			using var context = new ComputerShopDatabase();
			return context.Users.Select(x => x.GetViewModel).ToList();
		}


		public UserViewModel? GetElement(UserSearchModel model)
		{
			using var context = new ComputerShopDatabase();
			return context.Users.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
		}

		public UserViewModel? Insert(UserBindingModel model)
		{
			var newUser = User.Create(model);
			if (newUser == null)
			{
				return null;
			}
			using var context = new ComputerShopDatabase();
			context.Users.Add(newUser);
			context.SaveChanges();
			return newUser.GetViewModel;
		}

		public UserViewModel? Update(UserBindingModel model)
		{
			using var context = new ComputerShopDatabase();
			var user = context.Users.FirstOrDefault(x => x.Id == model.Id);
			if (user == null)
			{
				return null;
			}
			user.Update(model);
			context.SaveChanges();
			return user.GetViewModel;
		}

		public UserViewModel? Delete(UserBindingModel model)
		{
			using var context = new ComputerShopDatabase();
			var user = context.Users.FirstOrDefault(rec => rec.Id == model.Id);
			if (user != null)
			{
				context.Users.Remove(user);
				context.SaveChanges();
				return user.GetViewModel;
			}
			return null;
		}
	}
}