eShopOnContainers/src/Web/WebMVC/Services/IdentityParser.cs

using Microsoft.eShopOnContainers.WebMVC.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Security.Principal;
using System.Threading.Tasks;

namespace Microsoft.eShopOnContainers.WebMVC.Services
{
    public class IdentityParser:IIdentityParser<ApplicationUser>
    {
        public ApplicationUser Parse(IPrincipal principal)
        {
            // Pattern matching 'is' expression
            // assigns "claims" if "principal" is a "ClaimsPrincipal"
            if (principal is ClaimsPrincipal claims)
            {
                return new ApplicationUser
                {

                    CardHolderName = claims.Claims.FirstOrDefault(x => x.Type == "card_holder")?.Value ?? "",
                    CardNumber = claims.Claims.FirstOrDefault(x => x.Type == "card_number")?.Value ?? "",
                    Expiration = claims.Claims.FirstOrDefault(x => x.Type == "card_expiration")?.Value ?? "",
                    CardType = int.Parse(claims.Claims.FirstOrDefault(x => x.Type == "missing")?.Value ?? "0"),
                    City = claims.Claims.FirstOrDefault(x => x.Type == "address_city")?.Value ?? "",
                    Country = claims.Claims.FirstOrDefault(x => x.Type == "address_country")?.Value ?? "",
                    Email = claims.Claims.FirstOrDefault(x => x.Type == "email")?.Value ?? "",
                    Id = claims.Claims.FirstOrDefault(x => x.Type == "sub")?.Value ?? "",
                    LastName = claims.Claims.FirstOrDefault(x => x.Type == "last_name")?.Value ?? "",
                    Name = claims.Claims.FirstOrDefault(x => x.Type == "name")?.Value ?? "",
                    PhoneNumber = claims.Claims.FirstOrDefault(x => x.Type == "phone_number")?.Value ?? "",
                    SecurityNumber = claims.Claims.FirstOrDefault(x => x.Type == "card_security_number")?.Value ?? "",
                    State = claims.Claims.FirstOrDefault(x => x.Type == "address_state")?.Value ?? "",
                    Street = claims.Claims.FirstOrDefault(x => x.Type == "address_street")?.Value ?? "",
                    ZipCode = claims.Claims.FirstOrDefault(x => x.Type == "address_zip_code")?.Value ?? ""
                };
            }
            throw new ArgumentException(message: "The principal must be a ClaimsPrincipal", paramName: nameof(principal));
        }
    }
}