UmbracoHiddenFolderContentFinder.cs

using System.Web.Configuration;
using Umbraco.Core;
using Umbraco.Web.Routing;

namespace Moriyama.Core.Routing.ContentFinders
{
    public class UmbracoHiddenFolderContentFinder : ContentFinderByNiceUrl
    {
        public override bool TryFindContent(PublishedContentRequest contentRequest)
        {
            var umbracoHiddenFolderAlias = WebConfigurationManager.AppSettings["UmbracoHiddenFolderAlias"] ?? "umbracoHiddenFolder";

            // We call the base content finder here which is ContentFinderByNiceUrl,
            // that is why we remove ContentFinderByNiceUrl from the collection of content finders
            if (base.TryFindContent(contentRequest))
            {
                // We see if we can find a node and if it is not a Hidden Folder then we return true
                // We don't want to return a match for a folder by the normal nice URL
                if (contentRequest.PublishedContent != null)
                {
                    return contentRequest.PublishedContent.ContentType.Alias != umbracoHiddenFolderAlias;
                }
            }

            // Here we have to prepare the route

            var path = contentRequest.Uri.GetAbsolutePathDecoded();         
            string relativeRoute;
            string route;

            // if a domain has been set (multiple brands in one Umbraco - then routes have the id of that domain prepended to the path)
            if (contentRequest.HasDomain)
            {
                relativeRoute = DomainHelper.PathRelativeToDomain(contentRequest.DomainUri, path);
                route = contentRequest.UmbracoDomain.RootContentId + "/" + relativeRoute.Replace("/_folder-", "/");
            }
            else
            {
                relativeRoute = path;
                route = relativeRoute.Replace("/_folder-", "/");
            }

            // Now we can try to find the folder after removing the _folder- prefix

            var node = contentRequest.RoutingContext.UmbracoContext.ContentCache.GetByRoute(contentRequest.RoutingContext.UmbracoContext.InPreviewMode, route);
            if (node != null && node.ContentType.Alias == umbracoHiddenFolderAlias)
            {
                contentRequest.PublishedContent = node;
                return true;
            }

            return false;
        }
    }
}