PIbd-23_Polevoy_S.V._FlowerShop/FlowerShop/FlowerShopFileImplement/Models/Bouquet.cs

using FlowerShopContracts.BindingModels;
using FlowerShopContracts.ViewModels;
using FlowerShopDataModels.Models;
using System.Xml.Linq;
using System.Linq;

namespace FlowerShopFileImplement.Models
{
    public class Bouquet : IBouquetModel
    {
        public string BouquetName { get; private set; } = string.Empty;

        public double Price { get; private set; }

        public int Id { get; private set; }

        public Dictionary<int, int> Components { get; private set; } = new();

        private Dictionary<int, (IComponentModel, int)>? _bouquetComponents = new();

        public Dictionary<int, (IComponentModel, int)> BouquetComponents
        {
            get
            {
                if (_bouquetComponents == null)
                {
                    var source = DataFileSingleton.GetInstance();
                    _bouquetComponents = Components.ToDictionary(
                        x => x.Key,
                        y => ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!, y.Value)
                    );
                }
                return _bouquetComponents;
            }
        }

        public static Bouquet? Create(BouquetBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }

            return new Bouquet()
            {
                Id = model.Id,
                BouquetName = model.BouquetName,
                Price = model.Price,
                Components = model.BouquetComponents.ToDictionary(x => x.Key, x => x.Value.Item2)
            };
        }

        public static Bouquet? Create(XElement element)
        {
            if (element == null)
            {
                return null;
            }

            return new Bouquet()
            {
                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
                BouquetName = element.Element("BouquetName")!.Value,
                Price = Convert.ToDouble(element.Element("Price")!.Value),
                Components = element.Element("BouquetComponents")!.Elements("BouquetComponent").ToDictionary(
                    x => Convert.ToInt32(x.Element("Key")?.Value),
                    x => Convert.ToInt32(x.Element("Value")?.Value)
                )
            };
        }

        public void Update(BouquetBindingModel? model)
        {
            if (model == null)
            {
                return;
            }

            BouquetName = model.BouquetName;
            Price = model.Price;
            Components = model.BouquetComponents.ToDictionary(x => x.Key, x => x.Value.Item2);
            _bouquetComponents = null;
        }

        public BouquetViewModel GetViewModel => new()
        {
            Id = Id,
            BouquetName = BouquetName,
            Price = Price,
            BouquetComponents = BouquetComponents
        };

        public XElement GetXElement => new(
            "Bouquet",
            new XAttribute("Id", Id),
            new XElement("BouquetName", BouquetName),
            new XElement("Price", Price.ToString()),
            new XElement("BouquetComponents", Components.Select(x =>
            new XElement("BouquetComponent",
            new XElement("Key", x.Key),
            new XElement("Value", x.Value))).ToArray())
        );
    }
}