VisitorGroupTrackingAttribute.cs

using EPiServer.Core;
using EPiServer.Personalization.VisitorGroups;
using EPiServer.ServiceLocation;
using EPiServer.Tracking.Cms;
using EPiServer.Tracking.Core;
using EPiServer.Web;
using EPiServer.Web.Routing;
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Mvc;

namespace Foundation.Infrastructure.Tracking
{
    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Event, AllowMultiple = false)]
    public class VisitorGroupTrackingAttribute : ActionFilterAttribute
    {
        private readonly Injected<ITrackingService> _trackingService;
        private readonly Injected<IContextModeResolver> _contextModeResolver;
        private readonly Injected<IContentRouteHelper> _routeHelper;
        private readonly Injected<IVisitorGroupRepository> _visitorGroupRepo;

        //Called before the Action method (Controller) executes.
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
  
            IContent content = this._routeHelper.Service.Content;

            if (content == null || !this.PageIsInViewMode())
                return;

            HttpContextBase httpContext = filterContext.HttpContext;

            try
            {
                //Store matched and unmatched visitor groups
                var matchedVGs = new List<string>();
                var unmatchedVGs = new List<string>();

                //Helper class to check visitor group membership
                var vgHelper = new VisitorGroupHelper();

                //All visitor groups defined at current website
                var visitorGroups = _visitorGroupRepo.Service.List();

                foreach (var visitorGroup in visitorGroups)
                {
                    //Check if current user/visitor is member of visitor group
                    if (vgHelper.IsPrincipalInGroup(httpContext.User, visitorGroup.Name))
                    {
                        matchedVGs.Add(visitorGroup.Name);
                    }
                    else
                    {
                        unmatchedVGs.Add(visitorGroup.Name);
                    }
                }

                //Episerver standard tracking data with visitor group payload.
                var trackData = new TrackingData<VisitorGroupTrackDataWrapper>
                {
                    Payload = new VisitorGroupTrackDataWrapper
                    {
                        Epi = new VisitorGroupTrackingData
                        {
                            IncludeVisitorGroups = matchedVGs, //matched group
                            ExcludeVisitorGroups = unmatchedVGs //unmatched group
                        }
                    }
                };

                _trackingService.Service.TrackVisitorGroupAsync(trackData, httpContext);
            }
            catch
            {
            }

            base.OnActionExecuting(filterContext);
        }

        private bool PageIsInViewMode()
        {
            return this._contextModeResolver.Service.CurrentMode == ContextMode.Default;
        }
    }
}