ActionLinkNavigationFilter.cs

using Contrib.Navigation.Models;
using Orchard;
using Orchard.ContentManagement;
using Orchard.Logging;
using Orchard.Roles.Models;
using Orchard.Roles.Services;
using Orchard.Security;
using Orchard.Security.Permissions;
using Orchard.UI.Admin;
using Orchard.UI.Navigation;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Contrib.Navigation
{
    public class ActionLinkNavigationFilter : INavigationFilter
    {
        private IAuthorizationService _authorizationService;
        private IOrchardServices _orchardServices;
        private UrlHelper _urlHelper;

        public ActionLinkNavigationFilter(IAuthorizationService authorizationService, IOrchardServices orchardServices, UrlHelper urlHelper)
        {
            _authorizationService = authorizationService;
            _orchardServices = orchardServices;
            _urlHelper = urlHelper;
        }

        public ILogger Logger { get; set; }

        public IEnumerable<MenuItem> Filter(IEnumerable<MenuItem> menuItems)
        {
            // if you want to show the menu for users with "DebugShowAllMenuItems permission uncomment line 37 and line 52
            //var hasDebugShowAllMenuItems = _authorizationService.TryCheckAccess(Permission.Named("DebugShowAllMenuItems"), _orchardServices.WorkContext.CurrentUser, null);
            
            bool isAnonymous = true;
            var roles = _orchardServices.WorkContext.CurrentUser.As<IUserRoles>();
            if (roles != null)
            {
                isAnonymous = roles.Roles.Any(r => r == "Anonymous");
            }
            
            foreach (var item in menuItems)
            {
                if (item.Content != null && item.Content.ContentItem.ContentType == "ActionLink")
                {
                    var content = item.Content.As<ActionLinkPart>();

                    if (//hasDebugShowAllMenuItems ||
                        AdminFilter.IsApplied(_urlHelper.RequestContext) ||
                        isAnonymous)
                    {
                        yield return new MenuItem
                        {
                            Items = Filter(item.Items),
                            Permissions = item.Permissions,
                            Position = item.Position,
                            RouteValues = item.RouteValues,
                            LocalNav = item.LocalNav,
                            Culture = item.Culture,
                            Text = item.Text,
                            IdHint = item.IdHint,
                            Classes = item.Classes,
                            Url = item.Url,
                            LinkToFirstChild = item.LinkToFirstChild,
                            Href = item.Href,
                            Content = item.Content
                        };
                    }
                }
                else
                {
                    yield return item;
                }
            }
        }
    }
}