filemanager.h Example File

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#ifndef FILEMANAGER_H
#define FILEMANAGER_H
#include <QBitArray>
#include <QList>
#include <QMutex>
#include <QThread>
#include <QWaitCondition>
#include "metainfo.h"
class QByteArray;
class QFile;
class QTimerEvent;
class FileManager : public QThread
{
    Q_OBJECT
public:
    FileManager(QObject *parent = 0);
    virtual ~FileManager();
    inline void setMetaInfo(const MetaInfo &info) { metaInfo = info; }
    inline void setDestinationFolder(const QString &directory) { destinationPath = directory; }
    int read(int pieceIndex, int offset, int length);
    void write(int pieceIndex, int offset, const QByteArray &data);
    void verifyPiece(int pieceIndex);
    inline qint64 totalSize() const { return totalLength; }
    inline int pieceCount() const { return numPieces; }
    int pieceLengthAt(int pieceIndex) const;
    QBitArray completedPieces() const;
    void setCompletedPieces(const QBitArray &pieces);
    QString errorString() const;
public slots:
    void startDataVerification();
signals:
    void dataRead(int id, int pieceIndex, int offset, const QByteArray &data);
    void error();
    void verificationProgress(int percent);
    void verificationDone();
    void pieceVerified(int pieceIndex, bool verified);
protected:
    void run() override;
private slots:
    bool verifySinglePiece(int pieceIndex);
    void wakeUp();
private:
    bool generateFiles();
    QByteArray readBlock(int pieceIndex, int offset, int length);
    bool writeBlock(int pieceIndex, int offset, const QByteArray &data);
    void verifyFileContents();
    struct WriteRequest {
        int pieceIndex;
        int offset;
        QByteArray data;
    };
    struct ReadRequest {
        int pieceIndex;
        int offset;
        int length;
        int id;
    };
    QString errString;
    QString destinationPath;
    MetaInfo metaInfo;
    QList<QFile *> files;
    QList<QByteArray> sha1s;
    QBitArray verifiedPieces;
    bool newFile;
    int pieceLength;
    qint64 totalLength;
    int numPieces;
    int readId;
    bool startVerification;
    bool quit;
    bool wokeUp;
    QList<WriteRequest> writeRequests;
    QList<ReadRequest> readRequests;
    QList<int> pendingVerificationRequests;
    QList<int> newPendingVerificationRequests;
    QList<qint64> fileSizes;
    mutable QMutex mutex;
    mutable QWaitCondition cond;
};
#endif