/*
	grive: an GPL program to sync a local directory with Google Drive
	Copyright (C) 2013 Wan Wai Ho

	This program 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 version 2
	of the License.

	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 General Public License for more details.

	You should have received a copy of the GNU 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.
*/

#pragma once

#include "Val.hh"
#include "ValVisitor.hh"
#include <memory>

namespace gr {

class DataStream ;

class JsonWriter : public ValVisitor
{
public :
	JsonWriter( DataStream *out ) ;
	~JsonWriter() ;

	void Visit( long long t ) ;
	void Visit( double t ) ;
	void Visit( const std::string& t ) ;
	void Visit( bool t ) ;
	void VisitNull() ;

	void StartArray() ;
	void EndArray() ;
	void StartObject() ;
	void VisitKey( const std::string& t ) ;
	void EndObject() ;

private :
	static void WriteCallback( void *ctx, const char *str, std::size_t size ) ;

private :
	struct Impl ;
	std::auto_ptr<Impl>	m_impl ;
} ;

std::string WriteJson( const Val& val );

} // end of namespace