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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "messagingutil_p.h"
#include "qmessageid.h"
#include "qmessageaccountid.h"
#include "qmessagefolderid.h"
#include <qmessageglobal.h>

#include <QDebug>



QTM_BEGIN_NAMESPACE

namespace SymbianHelpers {

    EngineType idType(const QString& id)
    {
        if (id.startsWith(mtmPrefix)) {
            return EngineTypeMTM;
        } else if (id.startsWith(freestylePrefix)) {
            return EngineTypeFreestyle;
        } else {
            return EngineTypeMTM;
        }
    }

    EngineType idType(const QMessageId& id)
    {
        if (id.toString().startsWith(mtmPrefix)) {
            return EngineTypeMTM;
        } else if (id.toString().startsWith(freestylePrefix)) {
            return EngineTypeFreestyle;
        } else {
            return EngineTypeMTM;
        }
    }
    
    EngineType idType(const QMessageAccountId& id)
    {
        if (id.toString().startsWith(mtmPrefix)) {
            return EngineTypeMTM;
        } else if (id.toString().startsWith(freestylePrefix)) {
            return EngineTypeFreestyle;
        } else {
            return EngineTypeMTM;
        }
    }
    
    EngineType idType(const QMessageFolderId& id)
    {
        if (id.toString().startsWith(mtmPrefix)) {
            return EngineTypeMTM;
        } else if (id.toString().startsWith(freestylePrefix)) {
            return EngineTypeFreestyle;
        } else {
            return EngineTypeMTM;
        }
    }

    
    QString addIdPrefix(const QString& id, const EngineType& type)
    {
        switch (type) {
        case EngineTypeFreestyle:
            Q_ASSERT(!id.startsWith(freestylePrefix));
            return QString(freestylePrefix) + id;
        case EngineTypeMTM:
            Q_ASSERT(!id.startsWith(mtmPrefix));
            return QString(mtmPrefix) + id;
        default:
            return QString(id);
        }
    }

    QMessageAccountId addIdPrefix(const QMessageAccountId& id, const EngineType& type)
    {
        switch (type) {
        case EngineTypeFreestyle:
            Q_ASSERT(!id.toString().startsWith(freestylePrefix));
            return QMessageAccountId(QString(freestylePrefix) + id.toString());
        case EngineTypeMTM:
            Q_ASSERT(!id.toString().startsWith(mtmPrefix));
            return QMessageAccountId(QString(mtmPrefix) + id.toString());
        default:
            return QMessageAccountId(id);
        }
    }

    QMessageFolderId addIdPrefix(const QMessageFolderId& id, const EngineType& type)
    {
        switch (type) {
        case EngineTypeFreestyle:
            Q_ASSERT(!id.toString().startsWith(freestylePrefix));
            return QMessageFolderId(QString(freestylePrefix) + id.toString());
        case EngineTypeMTM:
            Q_ASSERT(!id.toString().startsWith(mtmPrefix));
            return QMessageFolderId(QString(mtmPrefix) + id.toString());
        default:
            return QMessageFolderId(id);
        }
    }

    QMessageId addIdPrefix(const QMessageId& id, const EngineType& type)
    {
        switch (type) {
        case EngineTypeFreestyle:
            Q_ASSERT(!id.toString().startsWith(freestylePrefix));
            return QMessageId(freestylePrefix + id.toString());
        case EngineTypeMTM:
            Q_ASSERT(!id.toString().startsWith(mtmPrefix));
            return QMessageId(mtmPrefix + id.toString());
        default:
            return QMessageId(id);
        }
    }

    QString stripIdPrefix(const QString& id)
    {
        if (id.startsWith(freestylePrefix))
            return id.right(id.length() - QString(freestylePrefix).length());
        else if (id.startsWith(mtmPrefix))
            return id.right(id.length() - QString(mtmPrefix).length());
        else
            return QString(id);
    }

    QMessageId stripIdPrefix(const QMessageId& id)
    {
        if (id.toString().startsWith(freestylePrefix))
            return QMessageId(id.toString().right(id.toString().length() - QString(freestylePrefix).length()));
        else if (id.toString().startsWith(mtmPrefix))
            return QMessageId(id.toString().right(id.toString().length() - QString(mtmPrefix).length()));
        else
            return QMessageId(id);
    }

    QMessageAccountId stripIdPrefix(const QMessageAccountId& id)
    {
        if (id.toString().startsWith(freestylePrefix))
            return QMessageAccountId(id.toString().right(id.toString().length() - QString(freestylePrefix).length()));
        else if (id.toString().startsWith(mtmPrefix))
            return QMessageAccountId(id.toString().right(id.toString().length() - QString(mtmPrefix).length()));
        else
            return QMessageAccountId(id);
    }

    QMessageFolderId stripIdPrefix(const QMessageFolderId& id)
    {
        if (id.toString().startsWith(freestylePrefix))
            return QMessageFolderId(id.toString().right(id.toString().length() - QString(freestylePrefix).length()));
        else if (id.toString().startsWith(mtmPrefix))
            return QMessageFolderId(id.toString().right(id.toString().length() - QString(mtmPrefix).length()));
        else
            return QMessageFolderId(id);
    }

}

namespace MessagingUtil {

    QString addIdPrefix(const QString& id)
    {
        if(id.startsWith(idPrefix()))
			qWarning() << "ID already prefixed";

        return idPrefix() + id;
    }

    QString stripIdPrefix(const QString& id)
    {
		if(!id.startsWith(idPrefix()))
			qWarning() << "ID not prefixed";

		return id.right(id.length() - idPrefix().length());
    }

    QString idPrefix()
    {
#ifdef Q_OS_SYMBIAN
        static QString prefix(SymbianHelpers::mtmPrefix);
#elif defined(Q_OS_WIN)
        static QString prefix("WIN_");
#else
        static QString prefix("QMF_");
#endif
        return prefix;
    }

    // TODO: directly unit test this
    bool globMatch(const QString &pattern, const QString &haystack) {
        QString::const_iterator patIt(pattern.begin());
        QString::const_iterator hayIt(haystack.begin());

        bool escaping(false);

        while (hayIt != haystack.end() && (escaping || *patIt != '%')) {

            if (!escaping && *patIt == '\\') {
                escaping = true;
                ++patIt;
                continue;
            }

            if ((patIt->toLower() != hayIt->toLower()) && (escaping || *patIt != '_'))
                return false;

            escaping = false;
            ++hayIt;
            ++patIt;
         }

        QString::const_iterator tPatIt(pattern.end());
        QString::const_iterator tHayIt(haystack.end());

        while (patIt != pattern.end() && hayIt != haystack.end()) {

            if (!escaping && *patIt == '\\') {
                escaping = true;
                ++patIt;
            } else if (!escaping && *patIt == '%') {
                if (++patIt == pattern.end())
                    return true;

                tPatIt = patIt;
                tHayIt = hayIt + 1;
            } else if (patIt->toLower() == hayIt->toLower() || (!escaping && *patIt == '_')) {
                escaping = false;
                ++patIt;
                ++hayIt;
            } else {
                escaping = false;
                patIt = tPatIt;
                hayIt = tHayIt++;
            }
        }

        // eat trailing %
        while (patIt != pattern.end() && *patIt == '%') {
            ++patIt;
        }

        return hayIt == haystack.end() && patIt == pattern.end();
    }


}

QTM_END_NAMESPACE