src/gui/guiaddtorrentmanager.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2015-2023  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * In addition, as a special exception, the copyright holders give permission to
  21  * link this program with the OpenSSL project's "OpenSSL" library (or with
  22  * modified versions of it that use the same license as the "OpenSSL" library),
  23  * and distribute the linked executables. You must obey the GNU General Public
  24  * License in all respects for all of the code used other than "OpenSSL".  If you
  25  * modify file(s), you may extend this exception to your version of the file(s),
  26  * but you are not obligated to do so. If you do not wish to do so, delete this
  27  * exception statement from your version.
  28  */
  29
  30 #include "guiaddtorrentmanager.h"
  31
  32 #include "base/bittorrent/session.h"
  33 #include "base/bittorrent/torrentdescriptor.h"
  34 #include "base/logger.h"
  35 #include "base/net/downloadmanager.h"
  36 #include "base/preferences.h"
  37 #include "base/torrentfileguard.h"
  38 #include "addnewtorrentdialog.h"
  39 #include "interfaces/iguiapplication.h"
  40 #include "mainwindow.h"
  41 #include "raisedmessagebox.h"
  42
  43 GUIAddTorrentManager::GUIAddTorrentManager(IGUIApplication *app, BitTorrent::Session *session, QObject *parent)
  44     : GUIApplicationComponent(app, session, parent)
  45 {
  46     connect(btSession(), &BitTorrent::Session::metadataDownloaded, this, &GUIAddTorrentManager::onMetadataDownloaded);
  47 }
  48
  49 bool GUIAddTorrentManager::addTorrent(const QString &source, const BitTorrent::AddTorrentParams &params, const AddTorrentOption option)
  50 {
  51     // `source`: .torrent file path,  magnet URI or URL
  52
  53     if (source.isEmpty())
  54         return false;
  55
  56     const auto *pref = Preferences::instance();
  57
  58     if ((option == AddTorrentOption::SkipDialog)
  59             || ((option == AddTorrentOption::Default) && !pref->isAddNewTorrentDialogEnabled()))
  60     {
  61         return AddTorrentManager::addTorrent(source, params);
  62     }
  63
  64     if (Net::DownloadManager::hasSupportedScheme(source))
  65     {
  66         LogMsg(tr("Downloading torrent... Source: \"%1\"").arg(source));
  67         // Launch downloader
  68         Net::DownloadManager::instance()->download(Net::DownloadRequest(source).limit(pref->getTorrentFileSizeLimit())
  69                 , pref->useProxyForGeneralPurposes(), this, &GUIAddTorrentManager::onDownloadFinished);
  70         m_downloadedTorrents[source] = params;
  71
  72         return true;
  73     }
  74
  75     if (const auto parseResult = BitTorrent::TorrentDescriptor::parse(source))
  76     {
  77         return processTorrent(source, parseResult.value(), params);
  78     }
  79     else if (source.startsWith(u"magnet:", Qt::CaseInsensitive))
  80     {
  81         handleAddTorrentFailed(source, parseResult.error());
  82         return false;
  83     }
  84
  85     const Path decodedPath {source.startsWith(u"file://", Qt::CaseInsensitive)
  86             ? QUrl::fromEncoded(source.toLocal8Bit()).toLocalFile() : source};
  87     auto torrentFileGuard = std::make_shared<TorrentFileGuard>(decodedPath);
  88     if (const auto loadResult = BitTorrent::TorrentDescriptor::loadFromFile(decodedPath))
  89     {
  90         const BitTorrent::TorrentDescriptor &torrentDescriptor = loadResult.value();
  91         const bool isProcessing = processTorrent(source, torrentDescriptor, params);
  92         if (isProcessing)
  93             setTorrentFileGuard(source, torrentFileGuard);
  94         return isProcessing;
  95     }
  96     else
  97     {
  98         handleAddTorrentFailed(decodedPath.toString(), loadResult.error());
  99         return false;
 100     }
 101
 102     return false;
 103 }
 104
 105 void GUIAddTorrentManager::onDownloadFinished(const Net::DownloadResult &result)
 106 {
 107     const QString &source = result.url;
 108     const BitTorrent::AddTorrentParams addTorrentParams = m_downloadedTorrents.take(source);
 109
 110     switch (result.status)
 111     {
 112     case Net::DownloadStatus::Success:
 113         if (const auto loadResult = BitTorrent::TorrentDescriptor::load(result.data))
 114             processTorrent(source, loadResult.value(), addTorrentParams);
 115         else
 116             handleAddTorrentFailed(source, loadResult.error());
 117         break;
 118     case Net::DownloadStatus::RedirectedToMagnet:
 119         if (const auto parseResult = BitTorrent::TorrentDescriptor::parse(result.magnetURI))
 120             processTorrent(source, parseResult.value(), addTorrentParams);
 121         else
 122             handleAddTorrentFailed(source, parseResult.error());
 123         break;
 124     default:
 125         handleAddTorrentFailed(source, result.errorString);
 126     }
 127 }
 128
 129 void GUIAddTorrentManager::onMetadataDownloaded(const BitTorrent::TorrentInfo &metadata)
 130 {
 131     Q_ASSERT(metadata.isValid());
 132     if (!metadata.isValid()) [[unlikely]]
 133         return;
 134
 135     for (const auto &[infoHash, dialog] : m_dialogs.asKeyValueRange())
 136     {
 137         if (metadata.matchesInfoHash(infoHash))
 138             dialog->updateMetadata(metadata);
 139     }
 140 }
 141
 142 bool GUIAddTorrentManager::processTorrent(const QString &source, const BitTorrent::TorrentDescriptor &torrentDescr, const BitTorrent::AddTorrentParams &params)
 143 {
 144     const bool hasMetadata = torrentDescr.info().has_value();
 145     const BitTorrent::InfoHash infoHash = torrentDescr.infoHash();
 146
 147     // Prevent showing the dialog if download is already present
 148     if (BitTorrent::Torrent *torrent = btSession()->findTorrent(infoHash))
 149     {
 150         if (hasMetadata)
 151         {
 152             // Trying to set metadata to existing torrent in case if it has none
 153             torrent->setMetadata(*torrentDescr.info());
 154         }
 155
 156         if (torrent->isPrivate() || (hasMetadata && torrentDescr.info()->isPrivate()))
 157         {
 158             handleDuplicateTorrent(source, torrent, tr("Trackers cannot be merged because it is a private torrent"));
 159         }
 160         else
 161         {
 162             bool mergeTrackers = btSession()->isMergeTrackersEnabled();
 163             if (Preferences::instance()->confirmMergeTrackers())
 164             {
 165                 const QMessageBox::StandardButton btn = RaisedMessageBox::question(app()->mainWindow(), tr("Torrent is already present")
 166                         , tr("Torrent '%1' is already in the transfer list. Do you want to merge trackers from new source?").arg(torrent->name())
 167                         , (QMessageBox::Yes | QMessageBox::No), QMessageBox::Yes);
 168                 mergeTrackers = (btn == QMessageBox::Yes);
 169             }
 170
 171             if (mergeTrackers)
 172             {
 173                 torrent->addTrackers(torrentDescr.trackers());
 174                 torrent->addUrlSeeds(torrentDescr.urlSeeds());
 175             }
 176         }
 177
 178         return false;
 179     }
 180
 181     if (!hasMetadata)
 182         btSession()->downloadMetadata(torrentDescr);
 183
 184     // By not setting a parent to the "AddNewTorrentDialog", all those dialogs
 185     // will be displayed on top and will not overlap with the main window.
 186     auto *dlg = new AddNewTorrentDialog(torrentDescr, params, nullptr);
 187     // Qt::Window is required to avoid showing only two dialog on top (see #12852).
 188     // Also improves the general convenience of adding multiple torrents.
 189     dlg->setWindowFlags(Qt::Window);
 190
 191     dlg->setAttribute(Qt::WA_DeleteOnClose);
 192     m_dialogs[infoHash] = dlg;
 193     connect(dlg, &QDialog::finished, this, [this, source, infoHash, dlg](int result)
 194     {
 195         if (dlg->isDoNotDeleteTorrentChecked())
 196             releaseTorrentFileGuard(source);
 197
 198         if (result == QDialog::Accepted)
 199             addTorrentToSession(source, dlg->torrentDescriptor(), dlg->addTorrentParams());
 200
 201         m_dialogs.remove(infoHash);
 202     });
 203     dlg->show();
 204
 205     return true;
 206 }