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using System;
using System.Collections.Specialized;
namespace MonoGame.Extended.Entities
{
public class Entity : IEquatable<Entity>
{
private readonly EntityManager _entityManager;
private readonly ComponentManager _componentManager;
internal Entity(int id, EntityManager entityManager, ComponentManager componentManager)
{
Id = id;
_entityManager = entityManager;
_componentManager = componentManager;
}
public int Id { get; }
public BitVector32 ComponentBits => _entityManager.GetComponentBits(Id);
public void Attach<T>(T component)
where T : class
{
var mapper = _componentManager.GetMapper<T>();
mapper.Put(Id, component);
}
public void Detach<T>()
where T : class
{
var mapper = _componentManager.GetMapper<T>();
mapper.Delete(Id);
}
public T Get<T>()
where T : class
{
var mapper = _componentManager.GetMapper<T>();
return mapper.Get(Id);
}
public bool Has<T>()
where T : class
{
return _componentManager.GetMapper<T>().Has(Id);
}
public void Destroy()
{
_entityManager.Destroy(Id);
}
public bool Equals(Entity other)
{
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return Id == other.Id;
}
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
if (obj.GetType() != GetType()) return false;
return Equals((Entity) obj);
}
public override int GetHashCode()
{
// ReSharper disable once NonReadonlyMemberInGetHashCode
return Id;
}
public static bool operator ==(Entity left, Entity right)
{
return Equals(left, right);
}
public static bool operator !=(Entity left, Entity right)
{
return !Equals(left, right);
}
}
}
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