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         const QPoint frameOffset {10, 40};
  68         delta = screenGeometry.topLeft() - dialogGeometry.topLeft() + frameOffset;
  69         if (delta.x() < 0)
  70             delta.setX(0);
  71         if (delta.y() < 0)
  72             delta.setY(0);
  73         dialogGeometry.translate(delta);
  74
  75         dialog->setGeometry(dialogGeometry);
  76     }
  77 }
  78
  79 GUIAddTorrentManager::GUIAddTorrentManager(IGUIApplication *app, BitTorrent::Session *session, QObject *parent)
  80     : GUIApplicationComponent(app, session, parent)
  81 {
  82     connect(btSession(), &BitTorrent::Session::metadataDownloaded, this, &GUIAddTorrentManager::onMetadataDownloaded);
  83 }
  84
  85 bool GUIAddTorrentManager::addTorrent(const QString &source, const BitTorrent::AddTorrentParams &params, const AddTorrentOption option)
  86 {
  87     // `source`: .torrent file path,  magnet URI or URL
  88
  89     if (source.isEmpty())
  90         return false;
  91
  92     const auto *pref = Preferences::instance();
  93
  94     if ((option == AddTorrentOption::SkipDialog)
  95             || ((option == AddTorrentOption::Default) && !pref->isAddNewTorrentDialogEnabled()))
  96     {
  97         return AddTorrentManager::addTorrent(source, params);
  98     }
  99
 100     if (Net::DownloadManager::hasSupportedScheme(source))
 101     {
 102         LogMsg(tr("Downloading torrent... Source: \"%1\"").arg(source));
 103         // Launch downloader
 104         Net::DownloadManager::instance()->download(Net::DownloadRequest(source).limit(pref->getTorrentFileSizeLimit())
 105                 , pref->useProxyForGeneralPurposes(), this, &GUIAddTorrentManager::onDownloadFinished);
 106         m_downloadedTorrents[source] = params;
 107
 108         return true;
 109     }
 110
 111     if (const auto parseResult = BitTorrent::TorrentDescriptor::parse(source))
 112     {
 113         return processTorrent(source, parseResult.value(), params);
 114     }
 115     else if (source.startsWith(u"magnet:", Qt::CaseInsensitive))
 116     {
 117         handleAddTorrentFailed(source, parseResult.error());
 118         return false;
 119     }
 120
 121     const Path decodedPath {source.startsWith(u"file://", Qt::CaseInsensitive)
 122             ? QUrl::fromEncoded(source.toLocal8Bit()).toLocalFile() : source};
 123     auto torrentFileGuard = std::make_shared<TorrentFileGuard>(decodedPath);
 124     if (const auto loadResult = BitTorrent::TorrentDescriptor::loadFromFile(decodedPath))
 125     {
 126         const BitTorrent::TorrentDescriptor &torrentDescriptor = loadResult.value();
 127         const bool isProcessing = processTorrent(source, torrentDescriptor, params);
 128         if (isProcessing)
 129             setTorrentFileGuard(source, torrentFileGuard);
 130         return isProcessing;
 131     }
 132     else
 133     {
 134         handleAddTorrentFailed(decodedPath.toString(), loadResult.error());
 135         return false;
 136     }
 137
 138     return false;
 139 }
 140
 141 void GUIAddTorrentManager::onDownloadFinished(const Net::DownloadResult &result)
 142 {
 143     const QString &source = result.url;
 144     const BitTorrent::AddTorrentParams addTorrentParams = m_downloadedTorrents.take(source);
 145
 146     switch (result.status)
 147     {
 148     case Net::DownloadStatus::Success:
 149         if (const auto loadResult = BitTorrent::TorrentDescriptor::load(result.data))
 150             processTorrent(source, loadResult.value(), addTorrentParams);
 151         else
 152             handleAddTorrentFailed(source, loadResult.error());
 153         break;
 154     case Net::DownloadStatus::RedirectedToMagnet:
 155         if (const auto parseResult = BitTorrent::TorrentDescriptor::parse(result.magnetURI))
 156             processTorrent(source, parseResult.value(), addTorrentParams);
 157         else
 158             handleAddTorrentFailed(source, parseResult.error());
 159         break;
 160     default:
 161         handleAddTorrentFailed(source, result.errorString);
 162     }
 163 }
 164
 165 void GUIAddTorrentManager::onMetadataDownloaded(const BitTorrent::TorrentInfo &metadata)
 166 {
 167     Q_ASSERT(metadata.isValid());
 168     if (!metadata.isValid()) [[unlikely]]
 169         return;
 170
 171     for (const auto &[infoHash, dialog] : m_dialogs.asKeyValueRange())
 172     {
 173         if (metadata.matchesInfoHash(infoHash))
 174             dialog->updateMetadata(metadata);
 175     }
 176 }
 177
 178 bool GUIAddTorrentManager::processTorrent(const QString &source
 179         , const BitTorrent::TorrentDescriptor &torrentDescr, const BitTorrent::AddTorrentParams &params)
 180 {
 181     const bool hasMetadata = torrentDescr.info().has_value();
 182     const BitTorrent::InfoHash infoHash = torrentDescr.infoHash();
 183
 184     // Prevent showing the dialog if download is already present
 185     if (BitTorrent::Torrent *torrent = btSession()->findTorrent(infoHash))
 186     {
 187         if (Preferences::instance()->confirmMergeTrackers())
 188         {
 189             if (hasMetadata)
 190             {
 191                 // Trying to set metadata to existing torrent in case if it has none
 192                 torrent->setMetadata(*torrentDescr.info());
 193             }
 194
 195             const bool isPrivate = torrent->isPrivate() || (hasMetadata && torrentDescr.info()->isPrivate());
 196             const QString dialogCaption = tr("Torrent is already present");
 197             if (isPrivate)
 198             {
 199                 // We cannot merge trackers for private torrent but we still notify user
 200                 // about duplicate torrent if confirmation dialog is enabled.
 201                 RaisedMessageBox::warning(app()->mainWindow(), dialogCaption
 202                         , tr("Trackers cannot be merged because it is a private torrent."));
 203             }
 204             else
 205             {
 206                 const bool mergeTrackers = btSession()->isMergeTrackersEnabled();
 207                 const QMessageBox::StandardButton btn = RaisedMessageBox::question(app()->mainWindow(), dialogCaption
 208                         , tr("Torrent '%1' is already in the transfer list. Do you want to merge trackers from new source?").arg(torrent->name())
 209                         , (QMessageBox::Yes | QMessageBox::No), (mergeTrackers ? QMessageBox::Yes : QMessageBox::No));
 210                 if (btn == QMessageBox::Yes)
 211                 {
 212                     torrent->addTrackers(torrentDescr.trackers());
 213                     torrent->addUrlSeeds(torrentDescr.urlSeeds());
 214                 }
 215             }
 216         }
 217         else
 218         {
 219             handleDuplicateTorrent(source, torrentDescr, torrent);
 220         }
 221
 222         return false;
 223     }
 224
 225     if (!hasMetadata)
 226         btSession()->downloadMetadata(torrentDescr);
 227
 228     // By not setting a parent to the "AddNewTorrentDialog", all those dialogs
 229     // will be displayed on top and will not overlap with the main window.
 230     auto *dlg = new AddNewTorrentDialog(torrentDescr, params, nullptr);
 231     // Qt::Window is required to avoid showing only two dialog on top (see #12852).
 232     // Also improves the general convenience of adding multiple torrents.
 233     dlg->setWindowFlags(Qt::Window);
 234
 235     dlg->setAttribute(Qt::WA_DeleteOnClose);
 236     m_dialogs[infoHash] = dlg;
 237     connect(dlg, &AddNewTorrentDialog::torrentAccepted, this
 238             , [this, source, dlg](const BitTorrent::TorrentDescriptor &torrentDescr, const BitTorrent::AddTorrentParams &addTorrentParams)
 239     {
 240         if (dlg->isDoNotDeleteTorrentChecked())
 241         {
 242             if (auto torrentFileGuard = releaseTorrentFileGuard(source))
 243                 torrentFileGuard->setAutoRemove(false);
 244         }
 245
 246         addTorrentToSession(source, torrentDescr, addTorrentParams);
 247     });
 248     connect(dlg, &AddNewTorrentDialog::torrentRejected, this, [this, source]
 249     {
 250         releaseTorrentFileGuard(source);
 251     });
 252     connect(dlg, &QDialog::finished, this, [this, source, infoHash]
 253     {
 254         m_dialogs.remove(infoHash);
 255     });
 256
 257     adjustDialogGeometry(dlg, app()->mainWindow());
 258     dlg->show();
 259
 260     return true;
 261 }