/*************************************************************************
 *  Copyright (C) 2008 by Volker Lanz <vl@fidra.de>                      *
 *                                                                       *
 *  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 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/>.*
 *************************************************************************/

#if !defined(KPMCORE_OPERATIONRUNNER_H)

#define KPMCORE_OPERATIONRUNNER_H

#include "util/libpartitionmanagerexport.h"

#include <QThread>
#include <QMutex>
#include <QtGlobal>

class Operation;
class OperationStack;
class Report;

/** Thread to run the Operations in the OperationStack.

    Runs the OperationStack when the user applies operations.

    @author Volker Lanz <vl@fidra.de>
*/
class LIBKPMCORE_EXPORT OperationRunner : public QThread
{
    Q_OBJECT
    Q_DISABLE_COPY(OperationRunner)

public:
    OperationRunner(QObject* parent, OperationStack& ostack);

public:
    void run();
    LIBKPMCORE_EXPORT qint32 numJobs() const;
    LIBKPMCORE_EXPORT qint32 numOperations() const;
    LIBKPMCORE_EXPORT qint32 numProgressSub() const;
    bool isCancelling() const {
        return m_Cancelling;    /**< @return if the user has requested cancelling */
    }
    void cancel() const {
        m_Cancelling = true;    /**< Sets cancelling to true. */
    }
    QMutex& suspendMutex() const {
        return m_SuspendMutex;    /**< @return the QMutex used for syncing */
    }
    QString description(qint32 op) const;
    void setReport(Report* report) {
        m_Report = report;    /**< @param report the Report to use while running */
    }

Q_SIGNALS:
    void progressSub(int);
    void opStarted(int, Operation*);
    void opFinished(int, Operation*);
    void finished();
    void cancelled();
    void error();

protected:
    OperationStack& operationStack() {
        return m_OperationStack;
    }
    const OperationStack& operationStack() const {
        return m_OperationStack;
    }
    void setCancelling(bool b) {
        m_Cancelling = b;
    }
    Report& report() {
        Q_ASSERT(m_Report);
        return *m_Report;
    }

private:
    OperationStack& m_OperationStack;
    Report* m_Report;
    mutable QMutex m_SuspendMutex;
    mutable volatile bool m_Cancelling;
};

#endif
