Authorize MVC

MyCondominiumAuthorizeAttribute.cs

public class MyCondominiumAuthorizeAttribute : AuthorizeAttribute
    {
        private IBCondominium _BCondominium;

        public override void OnAuthorization(AuthorizationContext filterContext)
        {
            _BCondominium = DependencyResolver.Current.GetService<IBCondominium>();
            CustomIdentity identity = filterContext.HttpContext.User.Identity as CustomIdentity;

            if (identity == null || !identity.IsAuthenticated)
                filterContext.Result = new HttpUnauthorizedResult();
            else if (identity.IsAuthenticated)
            {
                string socialnetworkname = filterContext.HttpContext.Request.Url.AbsolutePath.Split('/')[1];
                var socialnetwork = _BCondominium.GetByCondition(x => x.SocialNetworkName == socialnetworkname);
                if (socialnetwork.Members.Count(x => x.User.Id.Equals(identity.Id) && x.IsActive) == 0)
                    filterContext.Result = new HttpUnauthorizedResult();

                var member = socialnetwork.Members.Where(x => x.User.Id == identity.Id && x.IsActive).FirstOrDefault();
                string[] roles = new[] { "" };
                if (member != null)
                    roles = (member.MemberType.Name == "Admin") ? new[] { "User", "Admin" } : new[] { "User" };

                CustomPrincipal p = new CustomPrincipal(identity, roles);
                filterContext.HttpContext.User = p;
                Thread.CurrentPrincipal = p;
            }

            base.OnAuthorization(filterContext);

            if (filterContext.Result is HttpUnauthorizedResult)
            {
                var rawurl = filterContext.RequestContext.HttpContext.Request.RawUrl;
                var s = filterContext.RequestContext.HttpContext.Request["s"]; // parameter used by SolicitarConvite
                filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary(new { Action = "Entrar", Controller = "Home", s = s, r = rawurl }));
                return;
            }
        }
    }