annotate data/fileio/RemoteFile.h @ 299:576be0d0d218

* Merge transform directory from sv-match-alignment branch
  (the previous comment included notes for this stuff, but I missed it
  in the actual merge)
* Fix crash when a transform fails to create an output model and the
  thread that created the transform then deletes its input model thinking
  it's no longer needed, even though the transform run thread is still
  using it -- fix is to wait() on the transform before returning the
  null output model

/* -*- 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 2007 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 _REMOTE_FILE_H_
#define _REMOTE_FILE_H_

#include <QUrl>
#include <QMutex>
#include <QString>
#include <QTimer>

class QFtp;
class QHttp;
class QFile;
class QProgressDialog;
class QHttpResponseHeader;

class RemoteFile : public QObject
{
    Q_OBJECT

public:
    RemoteFile(QUrl url);
    virtual ~RemoteFile();

    bool isAvailable();

    void wait();

    bool isOK() const;
    bool isDone() const;

    QString getLocalFilename() const;
    QString getErrorString() const;

    void deleteLocalFile();

    static bool canHandleScheme(QUrl url);

signals:
    void progress(int percent);
    void ready();

protected slots:
    void dataReadProgress(int done, int total);
    void httpResponseHeaderReceived(const QHttpResponseHeader &resp);
    void ftpCommandFinished(int, bool);
    void dataTransferProgress(qint64 done, qint64 total);
    void done(bool error);
    void showProgressDialog();
    void cancelled();

protected:
    QFtp *m_ftp;
    QHttp *m_http;
    QFile *m_localFile;
    QString m_localFilename;
    QString m_errorString;
    bool m_ok;
    int m_lastStatus;
    bool m_done;
    QProgressDialog *m_progressDialog;
    QTimer m_progressShowTimer;

    void cleanup();

    QString createLocalFile(QUrl url);

    static QMutex m_fileCreationMutex;
    static int m_count;
};

#endif