src/base/bittorrent/nativetorrentextension.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2020  Vladimir Golovnev <glassez@yandex.ru>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #include "nativetorrentextension.h"
  30
  31 #include <libtorrent/torrent_status.hpp>
  32
  33 namespace
  34 {
  35     bool isAutoManaged(const lt::torrent_status &torrentStatus)
  36     {
  37         return static_cast<bool>(torrentStatus.flags & lt::torrent_flags::auto_managed);
  38     }
  39 }
  40
  41 NativeTorrentExtension::NativeTorrentExtension(const lt::torrent_handle &torrentHandle)
  42     : m_torrentHandle {torrentHandle}
  43 {
  44 }
  45
  46 bool NativeTorrentExtension::on_pause()
  47 {
  48     if (!isAutoManaged(m_torrentHandle.status({})))
  49         m_torrentHandle.unset_flags(lt::torrent_flags::stop_when_ready);
  50
  51     // return `false` to allow standard handler
  52     // and other extensions to be also invoked.
  53     return false;
  54 }
  55
  56 void NativeTorrentExtension::on_state(const lt::torrent_status::state_t state)
  57 {
  58     if (m_state == lt::torrent_status::downloading_metadata)
  59         m_torrentHandle.set_flags(lt::torrent_flags::stop_when_ready);
  60
  61     m_state = state;
  62 }