PaymentServiceDebug.cs

using System;
using System.Linq;
using EPiServer.ServiceLocation;
using Geta.EPi.Checkout.Core.Infrastructure.Exceptions;
using Mediachase.Commerce.Orders;
using Mediachase.Commerce.Website;
using Mediachase.Commerce.Website.Helpers;

namespace Geta.EPi.Checkout.Core.Services
{
    /// <summary>
    /// Service for processing a payment transaction.
    /// </summary>
    [ServiceConfiguration(typeof(IPaymentService), Lifecycle = ServiceInstanceScope.Singleton)]
    public class PaymentService : IPaymentService
    {
        private readonly Func<string, CartHelper> _cartHelper;

        public PaymentService(Func<string, CartHelper> cartHelper)
        {
            _cartHelper = cartHelper;
        }

        /// <summary>
        /// Prepares cart for payment - adds payment data to the cart. Should be run before CartCheckOut workflow.
        /// </summary>
        /// <param name="method">The payment method to use for payment.</param>
        public void PreparePayment(IPaymentOption method)
        {
            var cart = _cartHelper(Mediachase.Commerce.Orders.Cart.DefaultName).Cart;

            if (!cart.OrderForms.Any())
            {
                cart.OrderForms.AddNew();
            }

            var payment = method.PreProcess(cart.OrderForms[0]);
            if (payment == null)
            {
                throw new PaymentPreProcessException();
            }

            cart.OrderForms[0].Payments.Clear();
            cart.OrderForms[0].Payments.Add(payment);
            cart.AcceptChanges();
        }

        /// <summary>
        /// Processes the provided payment - prepares and completes payment by single call.
        /// </summary>
        /// <param name="method">The payment to process.</param>
        /// <returns>Service result indicating whether the processing was successfull or not.</returns>
        [Obsolete("Use PreparePayment and CompletePayment methods instead. ProcessPayment just calls PreparePayment and CompletePayment sequentially. It ignores CartCheckOut workflow.")]
        public virtual void ProcessPayment(IPaymentOption method)
        {
            PreparePayment(method);
            CompletePayment(method);
        }

        /// <summary>
        /// Updates cart after payment processing. Should be run after CartCheckOut workflow when payment to 3rd party completed.
        /// </summary>
        /// <param name="method">The payment method to use for payment completion.</param>
        public void CompletePayment(IPaymentOption method)
        {
            var cart = _cartHelper(Mediachase.Commerce.Orders.Cart.DefaultName).Cart;
            method.PostProcess(cart.OrderForms[0]);
        }
    }
}