Actor that adds additional system fields to Episerver Forms

EnrichFormSubmissionActor.cs

using EPiServer;
using EPiServer.Core;
using EPiServer.Forms.Core.PostSubmissionActor;
using EPiServer.Forms.Core.PostSubmissionActor.Internal;
using EPiServer.ServiceLocation;
using EPiServer.Web.Routing;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Alloy.Business.Forms
{
    public class EnrichFormSubmissionActor : PostSubmissionActorBase
    {
        protected Injected<IContentRepository> _contentRepo { get; set; }
        protected Injected<UrlResolver> _urlResolver { get; set; }

        public override object Run(object input)
        {
            //Actor that looks up the proper Content object / page where the form is located and adds that to the form data.
            var page = this.SubmissionData.Data[EPiServer.Forms.Constants.SYSTEMCOLUMN_HostedPage];
            if (!string.IsNullOrEmpty((string)page))
            {
                var pd = _contentRepo.Service.Get<PageData>(ContentReference.Parse((string)page));
                SubmissionData.Data.Add("SYSTEMCOLUMN_PageTitle", pd.Name);
                SubmissionData.Data.Add("SYSTEMCOLUMN_PageUrl", _urlResolver.Service.GetVirtualPath(pd.ContentLink).VirtualPath);
            }
            var result = new SubmissionActorResult();
            result.CancelSubmit = false;

            return result;

        }
    }
}