Custom Action Filters in nopCommerce v4

NopStartup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Nop.Core.Infrastructure;

namespace Nop.Plugin.Misc.CustomActionFilterDemo.Filters
{
    public class NopStartup : INopStartup
    {
        public void ConfigureServices(IServiceCollection services, IConfigurationRoot configuration)
        {
            services.Configure<MvcOptions>(config =>
            {
                config.Filters.Add<ProductDetailsActionFilter>();
            });
        }

        public void Configure(IApplicationBuilder application)
        {
            
        }

        public int Order => 0;
    }
}

ProductDetailsActionFilter.cs

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Controllers;
using Microsoft.AspNetCore.Mvc.Filters;
using Nop.Web.Controllers;
using Nop.Web.Models.Catalog;

namespace Nop.Plugin.Misc.CustomActionFilterDemo.Filters
{
    public class ProductDetailsActionFilter : ActionFilterAttribute
    {
        public override void OnResultExecuting(ResultExecutingContext context)
        {
            if (!(context.ActionDescriptor is ControllerActionDescriptor actionDescriptor)) return;

            if (actionDescriptor.ControllerTypeInfo != typeof(ProductController) ||
                actionDescriptor.ActionName != "ProductDetails" ||
                context.HttpContext.Request.Method != "GET")
            {
                return;
            }

            var result = context.Result as ViewResult;
            if (result == null) return;
            var model = result.Model as ProductDetailsModel;
            if (model == null) return;
            model.Name += " - This is magic from a Custom Action Filter";
        }
    }
}