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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program 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 Lesser General Public License for more details.

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

#ifndef NODEMETADATA_HEADER
#define NODEMETADATA_HEADER

#include "irr_v3d.h"
#include <string>
#include <iostream>
#include <map>

/*
	NodeMetadata stores arbitary amounts of data for special blocks.
	Used for furnaces, chests and signs.

	There are two interaction methods: inventory menu and text input.
	Only one can be used for a single metadata, thus only inventory OR
	text input should exist in a metadata.
*/

class Inventory;
class IGameDef;

class NodeMetadata
{
public:
	NodeMetadata(IGameDef *gamedef);
	~NodeMetadata();
	
	void serialize(std::ostream &os) const;
	void deSerialize(std::istream &is);
	
	void clear();

	// Generic key/value store
	std::string getString(const std::string &name) const
	{
		std::map<std::string, std::string>::const_iterator i;
		i = m_stringvars.find(name);
		if(i == m_stringvars.end())
			return "";
		return i->second;
	}
	void setString(const std::string &name, const std::string &var)
	{
		if(var.empty())
			m_stringvars.erase(name);
		else