PIbd-22_Aleikin_A.M._Confectionery/Confectionery/ConfectioneryDatabaseImplement/Implements/PastryStorage.cs

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

namespace ConfectioneryDatabaseImplement.Implements
{
	public class PastryStorage : IPastryStorage
	{
		public List<PastryViewModel> GetFullList()
		{
			using var context = new ConfectioneryDatabase();
			return context.Pastries
			 .Include(x => x.Components)
			.ThenInclude(x => x.Component)
			.ToList()
			.Select(x => x.GetViewModel)
			.ToList();
		}
		public List<PastryViewModel> GetFilteredList(PastrySearchModel model)
		{
			if (string.IsNullOrEmpty(model.PastryName))
			{
				return new();
			}
			using var context = new ConfectioneryDatabase();
			return context.Pastries
			 .Include(x => x.Components)
			.ThenInclude(x => x.Component)
			.Where(x => x.PastryName.Contains(model.PastryName))
			.ToList()
			.Select(x => x.GetViewModel)
			.ToList();
		}
		public PastryViewModel? GetElement(PastrySearchModel model)
		{
			if (string.IsNullOrEmpty(model.PastryName) &&
			!model.Id.HasValue)
			{
				return null;
			}
			using var context = new ConfectioneryDatabase();
			return context.Pastries
			 .Include(x => x.Components)
			 .ThenInclude(x => x.Component)
			 .FirstOrDefault(x => (!string.IsNullOrEmpty(model.PastryName) &&
			x.PastryName == model.PastryName) ||
			(model.Id.HasValue && x.Id ==
			model.Id))
			?.GetViewModel;
		}
		public PastryViewModel? Insert(PastryBindingModel model)
		{
			using var context = new ConfectioneryDatabase();
			var newPastry = Pastry.Create(context, model);
			if (newPastry == null)
			{
				return null;
			}
			context.Pastries.Add(newPastry);
			context.SaveChanges();
			return newPastry.GetViewModel;
		}
		public PastryViewModel? Update(PastryBindingModel model)
		{
			using var context = new ConfectioneryDatabase();
			using var transaction = context.Database.BeginTransaction();
			try
			{
				var pastry = context.Pastries.FirstOrDefault(rec =>
				rec.Id == model.Id);
				if (pastry == null)
				{
					return null;
				}
				pastry.Update(model);
				context.SaveChanges();
				pastry.UpdateComponents(context, model);
				transaction.Commit();
				return pastry.GetViewModel;
			}
			catch
			{
				transaction.Rollback();
				throw;
			}
		}
		public PastryViewModel? Delete(PastryBindingModel model)
		{
			using var context = new ConfectioneryDatabase();
			var element = context.Pastries
			.Include(x => x.Components)
			.FirstOrDefault(rec => rec.Id == model.Id);
			if (element != null)
			{
				context.Pastries.Remove(element);
				context.SaveChanges();
				return element.GetViewModel;
			}
			return null;
		}

	}
}