Episerver Forms Honeypot

HoneyPotActor.cs

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

namespace Demo.Web.Business.Forms
{
    public class HoneypotActor : PostSubmissionActorBase, ISyncOrderedSubmissionActor
    {
        public int Order => 1;

        public override object Run(object input)
        {
            var formContainerBlock = this.FormIdentity.GetFormBlock();
            var allFormsElements = formContainerBlock.Form.Steps.SelectMany(st => st.Elements).Where(elem => elem.SourceContent is HoneyPotElementBlock).ToList();
            if (allFormsElements.Any())
            {
                foreach (var fe in allFormsElements)
                {
                    if (!string.IsNullOrEmpty(this.SubmissionData.Data[fe.ElementName]?.ToString()))
                    {
                        var result = new SubmissionActorResult();
                        result.CancelSubmit = true;
                        result.ErrorMessage = "Spam bot detected";
                        return result;
                    }
                    else
                    {
                        //Remove data for HoneyPotElement from final data.
                        this.SubmissionData.Data.Remove(fe.ElementName);
                    }
                }
            }

            return "";
        }
    }
}

HoneyPotElementBlock.cs

using EPiServer.DataAnnotations;
using EPiServer.Forms.Core;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Demo.Web.Business.Forms
{
    [ContentType(DisplayName = "HoneyPot Spam Avoidance", GUID = "B8248208-75D5-451A-8F5C-82898697B010", Description = "")]
    public class HoneyPotElementBlock : ElementBlockBase
    {

    }
}

HoneyPotElementBlock.cshtml

@model Demo.Web.Business.Forms.HoneyPotElementBlock
<style>
    .ohnohoney {
        opacity: 0;
        position: absolute;
        top: 0;
        left: 0;
        height: 0;
        width: 0;
        z-index: -1;
        tabindex: -1;
    }
</style>
<label class="ohnohoney" for="@Model.FormElement.Guid"></label>
<input type="text" name="@Model.FormElement.ElementName" autocomplete="off" placeholder="Your name" id="@Model.FormElement.Guid" class="ohnohoney" data-f-type="custom" />