PIAPS_CW/DatabaseImplement/Models/Product.cs

using Contracts.BindingModels;
using Contracts.ViewModels;
using DataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static System.Runtime.InteropServices.JavaScript.JSType;

namespace DatabaseImplement.Models
{
	public class Product : IProduct
	{
		[Required]
		public Guid Id {  get; set; }
		[Required]
		public string Name { get; set; } = string.Empty;
		[Required]
		public double Price {  get; set; }
		[Required]
		public double Rate { get; set; }
		[Required]
		public bool IsBeingSold { get; set; }
		[Required]
		public int Amount { get; set; }
		[ForeignKey("ProductId")]
		public virtual List<PurchaseProducts> PurchaseProducts { get; set; } = new();
		public ProductBindingModel GetBindingModel() => new()
		{
			Id = Id,
			Name = Name,
			Price = Price,
			Rate = Rate,
			IsBeingSold = IsBeingSold,
			Amount = Amount
		};

		public static Product ToProductFromView(ProductViewModel model, Product product) => new()
		{
			Id = model.Id,
			Name = model.Name,
			Price = model.Price,
			Rate = model.Rate,
			IsBeingSold = model.IsBeingSold,
			Amount = model.Amount
		};

		public static Product ToProductFromBinding(ProductBindingModel model, Product product) => new()
		{
			Id = model.Id,
			Name = model.Name,
			Price = model.Price,
			Rate = model.Rate,
			IsBeingSold = model.IsBeingSold,
			Amount = model.Amount
		};

        public static Product Create(Database context, ProductBindingModel model)
		{
			return new Product()
			{
				Id = model.Id,
				Name = model.Name,
				Price = model.Price,
				Rate = model.Rate,
				IsBeingSold = model.IsBeingSold,
				Amount = model.Amount
			};
		}


        public void Update(ProductBindingModel model)
		{
			if (model is null)
			{
				throw new ArgumentNullException("Update product: binding model is null");
			}

			Name = model.Name;
			Price = model.Price;
			Rate = model.Rate;
			IsBeingSold = model.IsBeingSold;
			Amount = model.Amount;
		}
        public ProductViewModel GetViewModel
        {
            get
            {
                var context = new Database();
                return new()
                {
                    Id = Id,
                    Name = Name,
                    Price = Price,
                    IsBeingSold = IsBeingSold,
                    Rate = Rate,
					Amount = Amount
                };
            }
        }
    }
}