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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef RATECONTROLLER_H
#define RATECONTROLLER_H

#include <QObject>
#include <QSet>
#include <QTime>

class PeerWireClient;

class RateController : public QObject
{
    Q_OBJECT

public:
    inline RateController(QObject *parent = 0)
        : QObject(parent), transferScheduled(false) { }
    static RateController *instance();

    void addSocket(PeerWireClient *socket);
    void removeSocket(PeerWireClient *socket);

    inline int uploadLimit() const { return upLimit; }
    inline int downloadLimit() const { return downLimit; }
    inline void setUploadLimit(int bytesPerSecond) { upLimit = bytesPerSecond; }
    void setDownloadLimit(int bytesPerSecond);

public slots:
    void transfer();
    void scheduleTransfer();

private:
    QTime stopWatch;
    QSet<PeerWireClient *> sockets;
    int upLimit;
    int downLimit;
    bool transferScheduled;
};

#endif