SUBD_Gerimovich_Ilya_PIbd-22/FurnitureAssembly/FurnitureAssemblyDatabaseImplement/Implements/AdStorage.cs

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

namespace FurnitureAssemblyDatabaseImplement.Implements
{
    public class AdStorage : IAdStorage
    {
        public AdViewModel? GetElement(AdSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }

            using var context = new FurnitureAssemblyDatabase();

            return context.Ads.Include(x => x.Users).
                FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)
                ?.GetViewModel;
        }

        public List<AdViewModel> GetFilteredList(AdSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return new();
            }

            using var context = new FurnitureAssemblyDatabase();

            return context.Ads
                .Include(x => x.Users)
                .Where(x => x.Id == model.Id)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<AdViewModel> GetFullList()
        {
            using var context = new FurnitureAssemblyDatabase();

            return context.Ads.Include(x => x.Users)
                .Select(x => x.GetViewModel).ToList();
        }

        public AdViewModel? Insert(AdBindingModel model)
        {
            var newOrder = Ad.Create(model);

            if (newOrder == null)
            {
                return null;
            }

            using var context = new FurnitureAssemblyDatabase();
            context.Ads.Add(newOrder);
            context.SaveChanges();

            return context.Ads.Include(x => x.Users)
                .FirstOrDefault(x => x.Id == newOrder.Id)?.GetViewModel;
        }

        public AdViewModel? Update(AdBindingModel model)
        {
            using var context = new FurnitureAssemblyDatabase();
            var order = context.Ads.FirstOrDefault(x => x.Id == model.Id);

            if (order == null)
            {
                return null;
            }

            order.Update(model);
            context.SaveChanges();

            return context.Ads.Include(x => x.Users).FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
        }

        public AdViewModel? Delete(AdBindingModel model)
        {
            using var context = new FurnitureAssemblyDatabase();
            var element = context.Ads.FirstOrDefault(rec => rec.Id == model.Id);

            if (element != null)
            {
                context.Ads.Remove(element);
                context.SaveChanges();

                return element.GetViewModel;
            }

            return null;
        }
    }
}