comparison data/fileio/CachedFile.h @ 465:63b8ba45d953

* stub out persistent cacheing class, as I've decided I don't like the
  way things were going with trying to incorporate all this logic into
  the already too big FileSource class

+/* -*- 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>
+
+class ProgressReporter;
+
+class CachedFile
+{
+public:
+    CachedFile(QUrl url, ProgressReporter *reporter = 0);
+
+    virtual ~CachedFile();
+
+    bool isOK() const;
+
+    QString getLocalFilename() const;
+
+protected:
+    QUrl m_url;
+    QString m_localFilename;
+    bool m_ok;
+
+    void refresh();
+    bool retrieve();
+
+    QDateTime getLastRetrieval();
+    void updateLastRetrieval(bool successful);
+
+    static QString getCacheDirectory();
+    static QString getLocalFilenameFor(QUrl url);
+};
+
+#endif