/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_IMAP_H )
#define INCLUDED_IMAP_H

#include "generic/constant.h"

class Tokeniser;
class TokenWriter;

/// \brief A node whose state can be imported from a token stream.
class MapImporter
{
public:
STRING_CONSTANT( Name, "MapImporter" );

virtual bool importTokens( Tokeniser& tokeniser ) = 0;
};

/// \brief A node whose state can be exported to a token stream.
class MapExporter
{
public:
STRING_CONSTANT( Name, "MapExporter" );

virtual void exportTokens( TokenWriter& writer ) const = 0;
};

#include "iscenegraph.h"

class EntityCreator;

class TextInputStream;
class TextOutputStream;


typedef void ( *GraphTraversalFunc )( scene::Node& root, const scene::Traversable::Walker& walker );

/// \brief A module that reads and writes a map in a specific format.
class MapFormat
{
public:
virtual ~MapFormat() = default;
INTEGER_CONSTANT( Version, 2 );
STRING_CONSTANT( Name, "map" );
mutable bool wrongFormat;

/// \brief Read a map graph into \p root from \p outputStream, using \p entityTable to create entities.
virtual void readGraph( scene::Node& root, TextInputStream& inputStream, EntityCreator& entityTable ) const = 0;
/// \brief Write the map graph obtained by applying \p traverse to \p root into \p outputStream.
virtual void writeGraph( scene::Node& root, GraphTraversalFunc traverse, TextOutputStream& outputStream ) const = 0;
};


template<typename Type>
class Modules;
typedef Modules<MapFormat> MapModules;

template<typename Type>
class ModulesRef;
typedef ModulesRef<MapFormat> MapModulesRef;


#endif