Sitecore 8.x Custom Facet Repository

gistfile1.txt

using System;
using Sitecore.Analytics;
using Sitecore.Analytics.Model.Entities;

namespace MyNamespace.Repositories
{
  public interface IPaymentFacetRepository
  {
    void SetFacentInformation(string userIdentifier, decimal lastPaymentAmount, DateTime lastPaymentDate);
  }

  public class PaymentFacetRepository : IPaymentFacetRepository
  {
    public void SetFacentInformation(string userIdentifier, decimal lastPaymentAmount, DateTime lastPaymentDate)
    {
      if (Tracker.Current?.Session?.Contact != null)
      {
        var contact = Tracker.Current.Session.Contact;

        try
        {
          if (string.IsNullOrWhiteSpace(contact.Identifiers.Identifier))
          {
            Tracker.Current.Session.Identify(userIdentifier);
          }

          var paymentFacet = contact.GetFacet<ICustomerPaymentFacet>("Payment");
          paymentFacet.LastPaymentAmount = lastPaymentAmount;
          paymentFacet.LastPaymentDate = lastPaymentDate;

        }
        catch (Exception ex)
        {
          // Log Exception here.
        }
      }
    }
  }
}