mfgames-gallium-cil/src/Gallium/WhereNotAllComponentExtensions.cs

using System.Collections.Generic;
using System.Linq;

namespace Gallium
{
    public static class WhereNotAllComponentExtensions
    {
        public static IEnumerable<Entity> WhereNotComponent<T1>(
            this IEnumerable<Entity> entities)
        {
            return entities.Where(x => !x.Has<T1>());
        }

        public static IEnumerable<Entity> WhereNotAllComponents<T1>(
            this IEnumerable<Entity> entities)
        {
            return entities.Where(x => !x.Has<T1>());
        }


        public static IEnumerable<Entity> WhereNotAllComponents<T1, T2>(
            this IEnumerable<Entity> entities)
        {
            return entities.Where(x => !x.HasAll<T1, T2>());
        }

        public static IEnumerable<Entity> WhereNotAllComponents<T1, T2, T3>(
            this IEnumerable<Entity> entities)
        {
            return entities.Where(
                x => !x.HasAll<T1, T2, T3>());
        }

        public static IEnumerable<Entity> WhereNotAllComponents<T1, T2, T3, T4>(
            this IEnumerable<Entity> entities)
        {
            return entities.Where(
                x => !x.Has<T1>()
                    || !x.Has<T2>()
                    || !x.Has<T3>()
                    || !x.Has<T4>());
        }
    }
}