PIAPS_CW/DatabaseImplement/Models/CartItem.cs

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

namespace DatabaseImplement.Models
{
    public class CartItem : ICartItem
    {
        public Guid Id { get; set; }
        [Required]
        public Guid UserId { get; set; }
        [Required]
        public int Count { get; set; }
        public Guid? PurchaseId { get; set; }
        [Required]
        public DateTime DateCreated { get; set; }
        [Required]
        public Guid ProductId { get; set; }
        [Required]
        public bool IsClosed { get; set; }
        [Required]
        public string ProductName { get; set; } = string.Empty;
        public virtual Product? Product { get; set; }
        public virtual Purchase? Purchase { get; set; }
        public static CartItem Create(Database context, CartItemBindingModel model)
        {
            return new CartItem()
            {
                Id = model.Id,
                UserId = model.UserId,
                Count = model.Count,
                DateCreated = model.DateCreated,
                ProductId = model.ProductId,
                ProductName = model.ProductName,
                PurchaseId = model.PurchaseId,
                IsClosed = false
            };
        }
        public void Update(CartItemBindingModel model)
        {
            if (model is null)
            {
                throw new ArgumentNullException("Update CartItem: binding model is null");
            }
            Count = model.Count;
            PurchaseId = model.PurchaseId;
            IsClosed = model.IsClosed;
        }
        public CartItemViewModel GetViewModel
        {
            get
            {
                var context = new Database();
                return new()
                {
                    Id = Id,
                    UserId = UserId,
                    DateCreated = DateCreated,
                    ProductId = ProductId,
                    ProductName = ProductName,
                    Count = Count,
                    PurchaseId = PurchaseId,
                };
            }
        }
        public CartItemBindingModel GetBindingModel() => new()
        {
            Id = Id,
            UserId = UserId,
            DateCreated = DateCreated,
            ProductId = ProductId,
            ProductName = ProductName,
            Count = Count,
            PurchaseId = PurchaseId,
        };
    }
}