public interface IResultFilter<T>
    {
        IQueryable<T> Apply(IQueryable<T> qry);
        IResultFilter<T> GetFilter(HttpRequestBase request);
    }
    public class AlbumFilter : IResultFilter<Album.Album>
    {
        public bool? HasImages { get; set; }
        public ShortBy? SortBy { get; set; }
        public bool? OrderByDesc { get; set; }

        public IQueryable<Album.Album> Apply(IQueryable<Album.Album> qry)
        {
            if (HasImages != null && HasImages == true)
                qry = qry.Where(x => x.Images.Count > 0);
            if (SortBy != null)
            {
                bool desc = (OrderByDesc == null || OrderByDesc == false) ? false : true;
                switch (SortBy)
                {
                    case ShortBy.Created:
                        qry = desc ? qry.OrderByDescending(x => x.Created) : qry.OrderBy(x => x.Created);
                        break;
                    case ShortBy.LastEdit:
                        qry = desc ? qry.OrderByDescending(x => x.LastEdit) : qry.OrderBy(x => x.LastEdit);
                        break;
                    case ShortBy.Views:
                        qry = desc ? qry.OrderByDescending(x => x.Views) : qry.OrderBy(x => x.Views);
                        break;
                    case ShortBy.Images:
                        qry = desc ? qry.OrderByDescending(x => x.Images.Count) : qry.OrderBy(x => x.Images.Count);
                        break;
                }
            }
            return qry;
        }

        public IResultFilter<Album.Album> GetFilter(HttpRequestBase request)
        {
            return new AlbumFilter();
        }

        public enum ShortBy
        {
            Created,
            LastEdit,
            Views,
            Images
        }
    }