ISEbd-22_Alimova_M.S._Confectionery/Confectionery/ConfectioneryDatabaseImplement/Pastry.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.ViewModels;
using ConfectioneryDataModels.Models;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Runtime.Serialization;


namespace ConfectioneryDatabaseImplement.Models
{
	[DataContract]
	public class Pastry : IPastryModel
	{
		[DataMember]
		public int Id { get; set; }
		[DataMember]
		[Required]
		public string PastryName { get; set; } = string.Empty;
		[DataMember]
		[Required]
		public double Price { get; set; }
		private Dictionary<int, (IComponentModel, int)>? _pastryComponents = null;
		[DataMember]
		[NotMapped]
		public Dictionary<int, (IComponentModel, int)> PastryComponents
		{
			get
			{
				if (_pastryComponents == null)
				{
					_pastryComponents = Components
					.ToDictionary(recPC => recPC.ComponentId, recPC =>
				   (recPC.Component as IComponentModel, recPC.Count));
				}
				return _pastryComponents;
			}
		}
		[ForeignKey("PastryId")]
		public virtual List<PastryComponent> Components { get; set; } = new();
		[ForeignKey("PastryId")]
		public virtual List<Order> Orders { get; set; } = new();
		public static Pastry Create(ConfectioneryDatabase context, PastryBindingModel model)
		{
			return new Pastry()
			{
				Id = model.Id,
				PastryName = model.PastryName,
				Price = model.Price,
				Components = model.PastryComponents.Select(x => new PastryComponent
				{
					Component = context.Components.First(y => y.Id == x.Key),
					Count = x.Value.Item2
				}).ToList()
			};
		}
		public void Update(PastryBindingModel model)
		{
			PastryName = model.PastryName;
			Price = model.Price;
		}
		public PastryViewModel GetViewModel => new()
		{
			Id = Id,
			PastryName = PastryName,
			Price = Price,
			PastryComponents = PastryComponents
		};
		public void UpdateComponents(ConfectioneryDatabase context, PastryBindingModel model)
		{
			var pastryComponents = context.PastryComponents.Where(rec => rec.PastryId == model.Id).ToList();
			if (pastryComponents != null && pastryComponents.Count > 0)
			{ // удалили те, которых нет в модели
				context.PastryComponents.RemoveRange(pastryComponents.Where(rec => !model.PastryComponents.ContainsKey(rec.ComponentId)));
				context.SaveChanges();
				// обновили количество у существующих записей
				foreach (var updateComponent in pastryComponents)
				{
					updateComponent.Count = model.PastryComponents[updateComponent.ComponentId].Item2;
					model.PastryComponents.Remove(updateComponent.ComponentId);
				}
				context.SaveChanges();
			}
			var pastry = context.Pastrys.First(x => x.Id == Id);
			foreach (var pc in model.PastryComponents)
			{
				context.PastryComponents.Add(new PastryComponent
				{
					Pastry = pastry,
					Component = context.Components.First(x => x.Id == pc.Key),
					Count = pc.Value.Item2
				});
				context.SaveChanges();
			}
			_pastryComponents = null;
		}
	}
}