view data/fileio/CachedFile.h @ 795:dc20458f6f85 qt5

Don't need to check for Dataquay, and in fact we can pick up the wrong version if we do. Just assume it is available (building in e.g. sv subdir configuration)

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2008 QMUL.
    
    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 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _CACHED_FILE_H_
#define _CACHED_FILE_H_

#include <QString>
#include <QUrl>
#include <QDateTime>
#include <map>

class ProgressReporter;

class CachedFile
{
public:
    CachedFile(QString fileOrUrl,
               ProgressReporter *reporter = 0,
               QString preferredContentType = "");
    CachedFile(QUrl url,
               ProgressReporter *reporter = 0,
               QString preferredContentType = "");

    virtual ~CachedFile();

    bool isOK() const;

    QString getLocalFilename() const;

protected:
    QString m_origin;
    QString m_localFilename;
    QString m_preferredContentType;
    ProgressReporter *m_reporter;
    bool m_ok;

    void checkFile();
    bool retrieve();

    QDateTime getLastRetrieval();
    void updateLastRetrieval(bool successful);

    static QString getCacheDirectory();
    static QString getLocalFilenameFor(QUrl url);

    typedef std::map<QString, QString> OriginLocalFilenameMap;
    static OriginLocalFilenameMap m_knownGoodCaches;
};

#endif