/*
   core/extension.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_CORE_EXTENSION_H__
#define __INCLUDED_CORE_EXTENSION_H__

namespace core
{
class Extension;
}

#include "core/entity.h"

namespace core
{

/// a abstract base class for entity extensions
class Extension
{
public:
	/// extension types
	enum Type { Client = 0, Render = 1, Sound = 2, Game = 3 };

	inline Type type() const {
		return  extension_type;
	}

	inline Entity *entity() {
		return extension_entity;
	}

	Extension(Type type, Entity *entity);
	virtual ~Extension();

	virtual void frame(float elapsed) = 0;

private:
	Type			extension_type;
	Entity			*extension_entity;

};

} // namespace core

#endif // __INCLUDED_CORE_EXTENSION_H__