/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef FILEMANAGER_H+
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#define FILEMANAGER_H+
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+
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#include <QBitArray>+
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#include <QList>+
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#include <QMutex>+
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#include <QThread>+
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#include <QWaitCondition>+
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+
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#include "metainfo.h"+
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+
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QT_BEGIN_NAMESPACE+
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class QByteArray;+
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class QFile;+
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class QTimerEvent;+
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QT_END_NAMESPACE+
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+
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class FileManager : public QThread+
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{+
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    Q_OBJECT+
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+
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public:+
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    FileManager(QObject *parent = 0);+
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    virtual ~FileManager();+
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+
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    inline void setMetaInfo(const MetaInfo &info) { metaInfo = info; }+
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    inline void setDestinationFolder(const QString &directory) { destinationPath = directory; }+
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    +
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    int read(int pieceIndex, int offset, int length);+
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    void write(int pieceIndex, int offset, const QByteArray &data);+
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    void verifyPiece(int pieceIndex);+
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    inline qint64 totalSize() const { return totalLength; }+
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+
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    inline int pieceCount() const { return numPieces; }+
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    int pieceLengthAt(int pieceIndex) const;+
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+
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    QBitArray completedPieces() const;+
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    void setCompletedPieces(const QBitArray &pieces);+
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+
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    QString errorString() const;+
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+
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public slots:+
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    void startDataVerification();+
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+
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signals:+
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    void dataRead(int id, int pieceIndex, int offset, const QByteArray &data);+
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    void error();+
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    void verificationProgress(int percent);+
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    void verificationDone();+
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    void pieceVerified(int pieceIndex, bool verified);+
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+
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protected:+
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    void run();+
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+
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private slots:+
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    bool verifySinglePiece(int pieceIndex);+
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    void wakeUp();+
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+
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private:+
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    bool generateFiles();+
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    QByteArray readBlock(int pieceIndex, int offset, int length);+
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    bool writeBlock(int pieceIndex, int offset, const QByteArray &data);+
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    void verifyFileContents();+
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+
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    struct WriteRequest {+
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        int pieceIndex;+
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        int offset;+
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        QByteArray data;+
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    };+
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    struct ReadRequest {+
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        int pieceIndex;+
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        int offset;+
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        int length;+
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        int id;+
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    };+
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+
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    QString errString;+
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    QString destinationPath;+
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    MetaInfo metaInfo;+
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    QList<QFile *> files;+
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    QList<QByteArray> sha1s;+
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    QBitArray verifiedPieces;+
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+
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    bool newFile;+
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    int pieceLength;+
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    qint64 totalLength;+
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    int numPieces;+
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    int readId;+
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    bool startVerification;+
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    bool quit;+
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    bool wokeUp;+
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+
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    QList<WriteRequest> writeRequests;+
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    QList<ReadRequest> readRequests;+
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    QList<int> pendingVerificationRequests;+
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    QList<int> newPendingVerificationRequests;+
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    QList<qint64> fileSizes;+
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+
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    mutable QMutex mutex;+
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    mutable QWaitCondition cond;+
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};+
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+
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#endif+
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