/*
 *   Copyright (C) 2007 by Ishan Arora
 *   ishanarora@gmail.com
 *
 *   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; either version 2 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 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.,
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */


#include "json.h"

QString toJson(QVariant v)
{
	if (v.isNull())
		return "null";
	QString result;
	switch(v.type())
	{
		case QVariant::Bool:
		case QVariant::Double:
		case QVariant::Int:
		case QVariant::LongLong:
		case QVariant::UInt:
		case QVariant::ULongLong:
			return v.value<QString>();
		case QVariant::String:
		{
			QString s = v.value<QString>();
			result = "\"";
			for(int i=0; i<s.size(); i++)
			{
				QChar ch = s[i];
				switch(ch.toAscii())
				{
					case '\b':
						result += "\\b";
						break;
					case '\f':
						result += "\\f";
						break;
					case '\n':
						result += "\\n";
						break;
					case '\r':
						result += "\\r";
						break;
					case '\t':
						result += "\\t";
						break;
					case '\"':
					case '\'':
					case '\\':
					case '&':
						result += '\\';
					case '\0':
					default:
						result += ch;
				}
			}
			result += "\"";
			return result;
		}
		case QVariant::List:
		{
			result = "[";
			QListIterator<QVariant> it(v.value<QVariantList>());
			while (it.hasNext())
				result += toJson(it.next()) + ",";
			if(result.size() > 1)
				result.chop(1);
			result += "]";
			return result;
		}
		case QVariant::Map:
		{
			result = "{";
			QMapIterator<QString, QVariant> it(v.value<QVariantMap>());
			while (it.hasNext()) {
				it.next();
				if(it.value().isValid())
					result += toJson(QVariant(it.key())) + ":" + toJson(it.value()) + ",";
			}
			if(result.size() > 1)
				result.chop(1);
			result += "}";
			return result;
		}
		default:
			return "undefined";
	}
}