Orchard/src/Orchard.Web/Core/Navigation/Drivers/AdminMenuPartDriver.cs

using JetBrains.Annotations;
using Orchard.ContentManagement;
using Orchard.ContentManagement.Drivers;
using Orchard.Core.Navigation.Models;
using Orchard.Localization;
using Orchard.Security;
using Orchard.UI.Navigation;
using Orchard.Utility;

namespace Orchard.Core.Navigation.Drivers {
    [UsedImplicitly]
    public class AdminMenuPartDriver : ContentPartDriver<AdminMenuPart> {
        private readonly IAuthorizationService _authorizationService;
        private readonly INavigationManager _navigationManager;
        private readonly IOrchardServices _orchardServices;

        public AdminMenuPartDriver(IAuthorizationService authorizationService, INavigationManager navigationManager, IOrchardServices orchardServices) {
            _authorizationService = authorizationService;
            _navigationManager = navigationManager;
            _orchardServices = orchardServices;
            T = NullLocalizer.Instance;
        }

        public Localizer T { get; set; }

        protected override DriverResult Editor(AdminMenuPart part, dynamic shapeHelper) {
            // todo: we need a 'ManageAdminMenu' too?
            if (!_authorizationService.TryCheckAccess(Permissions.ManageMainMenu, _orchardServices.WorkContext.CurrentUser, part))
                return null;

            return ContentShape("Parts_Navigation_AdminMenu_Edit",
                                () => shapeHelper.EditorTemplate(TemplateName: "Parts.Navigation.AdminMenu.Edit", Model: part, Prefix: Prefix));
        }

        protected override DriverResult Editor(AdminMenuPart part, IUpdateModel updater, dynamic shapeHelper) {
            if (!_authorizationService.TryCheckAccess(Permissions.ManageMainMenu, _orchardServices.WorkContext.CurrentUser, part))
                return null;

            updater.TryUpdateModel(part, Prefix, null, null);

            if (part.OnAdminMenu && string.IsNullOrEmpty(part.AdminMenuText))
                updater.AddModelError("AdminMenuText", T("The AdminMenuText field is required"));

            if (string.IsNullOrEmpty(part.AdminMenuPosition))
                part.AdminMenuPosition = Position.GetNext(_navigationManager.BuildMenu("admin"));

            return Editor(part, shapeHelper);
        }
    }
}