encompass-cs/encompass-cs/Utility/EntityTracker.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace Encompass
{
    internal class EntityTracker
    {
        private readonly HashSet<Guid> trackedEntityIDs = new HashSet<Guid>();

        public IEnumerable<Guid> TrackedEntityIDs
        {
            get { return trackedEntityIDs; }
        }

        public void TrackEntity(Guid entityID)
        {
            trackedEntityIDs.Add(entityID);
        }

        public void UntrackEntity(Guid entityID)
        {
            trackedEntityIDs.Remove(entityID);
        }

        public bool IsTracking(Guid entityID)
        {
            return trackedEntityIDs.Contains(entityID);
        }
    }
}