view data/fileio/CachedFile.h @ 875:3e6ed8a8577b tonioni

Use a sparse time-value model only for outputs with fixed bin count of 1, not for those with unknown bin count.
(Precursor to using more than one model for outputs with unknown bin count)

/* -*- 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