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 <QScreen>
  33
  34 #include "base/bittorrent/session.h"
  35 #include "base/bittorrent/torrentdescriptor.h"
  36 #include "base/logger.h"
  37 #include "base/net/downloadmanager.h"
  38 #include "base/preferences.h"
  39 #include "base/torrentfileguard.h"
  40 #include "addnewtorrentdialog.h"
  41 #include "interfaces/iguiapplication.h"
  42 #include "mainwindow.h"
  43 #include "raisedmessagebox.h"
  44
  45 namespace
  46 {
  47     void adjustDialogGeometry(QWidget *dialog, const QWidget *parentWindow)
  48     {
  49         // It is preferable to place the dialog in the center of the parent window.
  50         // However, if it goes beyond the current screen, then move it so that it fits there
  51         // (or, if the dialog is larger than the current screen, at least make sure that
  52         // the upper/left coordinates of the dialog are inside it).
  53
  54         QRect dialogGeometry = dialog->geometry();
  55
  56         dialogGeometry.moveCenter(parentWindow->geometry().center());
  57
  58         const QRect screenGeometry = parentWindow->screen()->availableGeometry();
  59
  60         QPoint delta = screenGeometry.bottomRight() - dialogGeometry.bottomRight();
  61         if (delta.x() > 0)
  62             delta.setX(0);
  63         if (delta.y() > 0)
  64             delta.setY(0);
  65         dialogGeometry.translate(delta);
  66
  67         delta = screenGeometry.topLeft() - dialogGeometry.topLeft();
  68         if (delta.x() < 0)
  69             delta.setX(0);
  70         if (delta.y() < 0)
  71             delta.setY(0);
  72         dialogGeometry.translate(delta);
  73
  74         dialog->setGeometry(dialogGeometry);
  75     }
  76 }
  77
  78 GUIAddTorrentManager::GUIAddTorrentManager(IGUIApplication *app, BitTorrent::Session *session, QObject *parent)
  79     : GUIApplicationComponent(app, session, parent)
  80 {
  81     connect(btSession(), &BitTorrent::Session::metadataDownloaded, this, &GUIAddTorrentManager::onMetadataDownloaded);
  82 }
  83
  84 bool GUIAddTorrentManager::addTorrent(const QString &source, const BitTorrent::AddTorrentParams &params, const AddTorrentOption option)
  85 {
  86     // `source`: .torrent file path,  magnet URI or URL
  87
  88     if (source.isEmpty())
  89         return false;
  90
  91     const auto *pref = Preferences::instance();
  92
  93     if ((option == AddTorrentOption::SkipDialog)
  94             || ((option == AddTorrentOption::Default) && !pref->isAddNewTorrentDialogEnabled()))
  95     {
  96         return AddTorrentManager::addTorrent(source, params);
  97     }
  98
  99     if (Net::DownloadManager::hasSupportedScheme(source))
 100     {
 101         LogMsg(tr("Downloading torrent... Source: \"%1\"").arg(source));
 102         // Launch downloader
 103         Net::DownloadManager::instance()->download(Net::DownloadRequest(source).limit(pref->getTorrentFileSizeLimit())
 104                 , pref->useProxyForGeneralPurposes(), this, &GUIAddTorrentManager::onDownloadFinished);
 105         m_downloadedTorrents[source] = params;
 106
 107         return true;
 108     }
 109
 110     if (const auto parseResult = BitTorrent::TorrentDescriptor::parse(source))
 111     {
 112         return processTorrent(source, parseResult.value(), params);
 113     }
 114     else if (source.startsWith(u"magnet:", Qt::CaseInsensitive))
 115     {
 116         handleAddTorrentFailed(source, parseResult.error());
 117         return false;
 118     }
 119
 120     const Path decodedPath {source.startsWith(u"file://", Qt::CaseInsensitive)
 121             ? QUrl::fromEncoded(source.toLocal8Bit()).toLocalFile() : source};
 122     auto torrentFileGuard = std::make_shared<TorrentFileGuard>(decodedPath);
 123     if (const auto loadResult = BitTorrent::TorrentDescriptor::loadFromFile(decodedPath))
 124     {
 125         const BitTorrent::TorrentDescriptor &torrentDescriptor = loadResult.value();
 126         const bool isProcessing = processTorrent(source, torrentDescriptor, params);
 127         if (isProcessing)
 128             setTorrentFileGuard(source, torrentFileGuard);
 129         return isProcessing;
 130     }
 131     else
 132     {
 133         handleAddTorrentFailed(decodedPath.toString(), loadResult.error());
 134         return false;
 135     }
 136
 137     return false;
 138 }
 139
 140 void GUIAddTorrentManager::onDownloadFinished(const Net::DownloadResult &result)
 141 {
 142     const QString &source = result.url;
 143     const BitTorrent::AddTorrentParams addTorrentParams = m_downloadedTorrents.take(source);
 144
 145     switch (result.status)
 146     {
 147     case Net::DownloadStatus::Success:
 148         if (const auto loadResult = BitTorrent::TorrentDescriptor::load(result.data))
 149             processTorrent(source, loadResult.value(), addTorrentParams);
 150         else
 151             handleAddTorrentFailed(source, loadResult.error());
 152         break;
 153     case Net::DownloadStatus::RedirectedToMagnet:
 154         if (const auto parseResult = BitTorrent::TorrentDescriptor::parse(result.magnetURI))
 155             processTorrent(source, parseResult.value(), addTorrentParams);
 156         else
 157             handleAddTorrentFailed(source, parseResult.error());
 158         break;
 159     default:
 160         handleAddTorrentFailed(source, result.errorString);
 161     }
 162 }
 163
 164 void GUIAddTorrentManager::onMetadataDownloaded(const BitTorrent::TorrentInfo &metadata)
 165 {
 166     Q_ASSERT(metadata.isValid());
 167     if (!metadata.isValid()) [[unlikely]]
 168         return;
 169
 170     for (const auto &[infoHash, dialog] : m_dialogs.asKeyValueRange())
 171     {
 172         if (metadata.matchesInfoHash(infoHash))
 173             dialog->updateMetadata(metadata);
 174     }
 175 }
 176
 177 bool GUIAddTorrentManager::processTorrent(const QString &source, const BitTorrent::TorrentDescriptor &torrentDescr, const BitTorrent::AddTorrentParams &params)
 178 {
 179     const bool hasMetadata = torrentDescr.info().has_value();
 180     const BitTorrent::InfoHash infoHash = torrentDescr.infoHash();
 181
 182     // Prevent showing the dialog if download is already present
 183     if (BitTorrent::Torrent *torrent = btSession()->findTorrent(infoHash))
 184     {
 185         if (hasMetadata)
 186         {
 187             // Trying to set metadata to existing torrent in case if it has none
 188             torrent->setMetadata(*torrentDescr.info());
 189         }
 190
 191         if (torrent->isPrivate() || (hasMetadata && torrentDescr.info()->isPrivate()))
 192         {
 193             handleDuplicateTorrent(source, torrent, tr("Trackers cannot be merged because it is a private torrent"));
 194         }
 195         else
 196         {
 197             bool mergeTrackers = btSession()->isMergeTrackersEnabled();
 198             if (Preferences::instance()->confirmMergeTrackers())
 199             {
 200                 const QMessageBox::StandardButton btn = RaisedMessageBox::question(app()->mainWindow(), tr("Torrent is already present")
 201                         , tr("Torrent '%1' is already in the transfer list. Do you want to merge trackers from new source?").arg(torrent->name())
 202                         , (QMessageBox::Yes | QMessageBox::No), QMessageBox::Yes);
 203                 mergeTrackers = (btn == QMessageBox::Yes);
 204             }
 205
 206             if (mergeTrackers)
 207             {
 208                 torrent->addTrackers(torrentDescr.trackers());
 209                 torrent->addUrlSeeds(torrentDescr.urlSeeds());
 210             }
 211         }
 212
 213         return false;
 214     }
 215
 216     if (!hasMetadata)
 217         btSession()->downloadMetadata(torrentDescr);
 218
 219     // By not setting a parent to the "AddNewTorrentDialog", all those dialogs
 220     // will be displayed on top and will not overlap with the main window.
 221     auto *dlg = new AddNewTorrentDialog(torrentDescr, params, nullptr);
 222     // Qt::Window is required to avoid showing only two dialog on top (see #12852).
 223     // Also improves the general convenience of adding multiple torrents.
 224     dlg->setWindowFlags(Qt::Window);
 225
 226     dlg->setAttribute(Qt::WA_DeleteOnClose);
 227     m_dialogs[infoHash] = dlg;
 228     connect(dlg, &QDialog::finished, this, [this, source, infoHash, dlg](int result)
 229     {
 230         if (dlg->isDoNotDeleteTorrentChecked())
 231             releaseTorrentFileGuard(source);
 232
 233         if (result == QDialog::Accepted)
 234             addTorrentToSession(source, dlg->torrentDescriptor(), dlg->addTorrentParams());
 235
 236         m_dialogs.remove(infoHash);
 237     });
 238
 239     adjustDialogGeometry(dlg, app()->mainWindow());
 240     dlg->show();
 241
 242     return true;
 243 }