using System.Linq.Expressions;

namespace MessengerBroker
{
    public static class EntityExtensions
    {
        public static IQueryable<Db.Model.User> GetUsers(this IQueryable<Db.Model.User> source, Guid[] guids)
        {
            return source.Where(x => guids.Any(g => g == x.Id));
        }

        public static IQueryable<Db.Model.User> GetUsersExcept(this IQueryable<Db.Model.User> source, IEnumerable<Guid> guids)
        {
            return source.Where(x => !guids.Any(g => g == x.Id));
        }

        public static bool GetUserExists(this IQueryable<Db.Model.User> source, Guid id)
        {
            return source.Any(x=> x.Id == id);
        }
    }
}