/****************************************************************************
** Copyright (C) 2001-2010 Klaralvdalens Datakonsult AB.  All rights reserved.
**
** This file is part of the KD Tools library.
**
** Licensees holding valid commercial KD Tools licenses may use this file in
** accordance with the KD Tools Commercial License Agreement provided with
** the Software.
**
**
** This file may be distributed and/or modified under the terms of the
** GNU Lesser General Public License version 2 and version 3 as published by the
** Free Software Foundation and appearing in the file LICENSE.LGPL included.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** Contact info@kdab.com if any conditions of this licensing are not
** clear to you.
**
**********************************************************************/

#ifndef KD_UPDATER_TASK_H
#define KD_UPDATER_TASK_H

#include "kdupdater.h"

#include <QObject>

namespace KDUpdater {

class KDTOOLS_EXPORT Task : public QObject
{
    Q_OBJECT

public:
    enum Capability
    {
        NoCapability = 0,
        Pausable     = 1,
        Stoppable    = 2
    };

    virtual ~Task();

    QString name() const;
    int capabilities() const;

    int error() const;
    QString errorString() const;

    bool isRunning() const;
    bool isFinished() const;
    bool isPaused() const;
    bool isStopped() const;

    int  progressPercent() const;
    QString progressText() const;

    bool autoDelete() const;
    void setAutoDelete(bool autoDelete);

public Q_SLOTS:
    void run();
    void stop();
    void pause();
    void resume();

Q_SIGNALS:
    void error(int code, const QString &errorText);
    void progressValue(int percent);
    void progressText(const QString &progressText);
    void started();
    void paused();
    void resumed();
    void stopped();
    void finished();

protected:
    explicit Task(const QString &name, int caps = NoCapability, QObject *parent = 0);
    void reportProgress(int percent, const QString &progressText);
    void reportError(int errorCode, const QString &errorText);
    void reportError(const QString &errorText);
    void reportDone();

    // Task interface
    virtual void doRun() = 0;
    virtual bool doStop() = 0;
    virtual bool doPause() = 0;
    virtual bool doResume() = 0;

private:
    int m_caps;
    QString m_name;
    int m_errorCode;
    QString m_errorText;
    bool m_started;
    bool m_finished;
    bool m_paused;
    bool m_stopped;
    int m_progressPc;
    QString m_progressText;
    bool m_autoDelete;
};

} // namespace KDUpdater

#endif // KD_UPDATER_TASK_H