using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json;

using System.Net.Http;

using System.Text;

​

namespace Cko.Model

{

    public class Customer

    {

        public List<Product> Products { get; set; }

        public string Name { get; set; }

        public string Email { get; set; }

        public DateTime DateSignedUp { get; set; }

​

        public Product GetProductionForCustomer(int productId)

        {

            return Products.FirstOrDefault(x => x.Id == productId);

        }

​

        public void AddProductToCustomer(Product product)

        {

            //The client needs to check if this customer 

            //can have this membership level of product.

            using(var c = new HttpClient())

            {

                var json = JsonConvert.SerializeObject(product);

                var content = new StringContent(json, 

                                    Encoding.UTF8, 

                                    "application/json");

​

                c.BaseAddress = new Uri("http://something.com/api/");

                //Inform the products service that this customer 

                //has a new product.

                c.PostAsync("/{customerid}/products", content);

            }

​

            Products.Add(product);

        }

​

        public bool CustomerCanHaveSilverMembershipLevel()

        {

            //The customer signed up at least 30 days ago. 

            var daysAgo = DateTime.Now - DateSignedUp;

            return daysAgo.TotalDays >= 30;

        }

​

        public bool CustomerCanHaveGoldMembershipLevel()

        {

            //The customer signed up at least 90 days ago. 

            var daysAgo = DateTime.Now - DateSignedUp;

            return daysAgo.TotalDays >= 90;

        }

    }

​

    public enum ProductMembershipLevel

    {

        Silver,

        Gold

    }

​

    public class Product

    {

        public int Id { get; set; }

        public string Name { get; set; }

        public ProductMembershipLevel ProductMembershipLevel { get; set; }

    }

}