/*
Copyright (C) 2010 Srivats P.

This file is part of "Ostinato"

This 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 3 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, see <http://www.gnu.org/licenses/>
*/

#ifndef _IPV6_ADDRESS_VALIDATOR_H
#define _IPV6_ADDRESS_VALIDATOR_H

#include <QValidator>
#include <QHostAddress>

class IPv6AddressValidator : public QValidator
{
public:
    IPv6AddressValidator(QObject *parent = 0)
        : QValidator(parent) 
    {
        _ip6ValidChars.setPattern("[0-9a-fA-F]{0,4}(:[0-9a-fA-F]{0,4}){0,7}");
    }
    ~IPv6AddressValidator() {}

    virtual QValidator::State validate(QString &input, int& /*pos*/) const
    {
        QValidator::State state;
        QHostAddress addr(input);

        //qDebug("%s: %s (%d)", __FUNCTION__, qPrintable(input), pos);

        if (addr.protocol() == QAbstractSocket::IPv6Protocol)
            state = Acceptable;
        else
            if (_ip6ValidChars.exactMatch(input))
                state = Intermediate;
            else
                state = Invalid;
        //qDebug("%s(%d): %s (%d), ", __FUNCTION__, state, 
            //qPrintable(input), pos);
        return state;
    }
    virtual void fixup(QString &input) const 
    {
        input.append("::");
        QHostAddress addr(input);
        int len = input.size();

        //qDebug("%s: %s", __FUNCTION__, qPrintable(input));

        while (addr.protocol() != QAbstractSocket::IPv6Protocol)
        {
            len--;
            Q_ASSERT(len >= 0);
            addr.setAddress(input.left(len));
        }

        input = addr.toString();
    }
private:
    QRegExp _ip6ValidChars;
};

#endif