Improve loading of magnet metadata in the background.

Conflicts:
	src/qtlibtorrent/qbtsession.cpp

src/addnewtorrentdialog.cpp

@@ -59,7 +59,6 @@ AddNewTorrentDialog::AddNewTorrentDialog(QWidget *parent) :
   m_contentDelegate(0),
   m_isMagnet(false),
   m_hasMetadata(false),
-  m_convertingMagnet(false),
   m_hasRenamedFile(false)
 {
   ui->setupUi(this);
@@ -263,7 +262,7 @@ bool AddNewTorrentDialog::loadTorrent(const QString& torrent_path, const QString
 
 bool AddNewTorrentDialog::loadMagnet(const QString &magnet_uri)
 {
-  connect(QBtSession::instance(), SIGNAL(metadataReceived(const QTorrentHandle&)), SLOT(updateMetadata(const QTorrentHandle&)));
+  connect(QBtSession::instance(), SIGNAL(metadataReceivedHidden(const QTorrentHandle&)), SLOT(updateMetadata(const QTorrentHandle&)));
   m_isMagnet = true;
   m_url = magnet_uri;
   m_hash = misc::magnetUriToHash(m_url);
@@ -291,19 +290,10 @@ bool AddNewTorrentDialog::loadMagnet(const QString &magnet_uri)
   Preferences pref;
   // Override save path
   TorrentTempData::setSavePath(m_hash, QString(QDir::tempPath() + QDir::separator() + m_hash).replace("\\", "/"));
-
-  // Temporary override of addInPause setting
-  bool old_addInPause = pref.addTorrentsInPause();
-  pref.addTorrentsInPause(false);
-  pref.sync();
-
+  HiddenData::addData(m_hash);
   QBtSession::instance()->addMagnetUri(m_url, false);
-  QBtSession::instance()->resumeTorrent(m_hash);
   setMetadataProgressIndicator(true, tr("Retrieving metadata..."));
 
-  // Restore addInPause setting
-  pref.addTorrentsInPause(old_addInPause);
-
   return true;
 }
 
@@ -606,18 +596,9 @@ void AddNewTorrentDialog::displayContentTreeMenu(const QPoint&) {
 
 void AddNewTorrentDialog::accept()
 {
-  if (m_isMagnet) {
-    if (m_convertingMagnet) {
-      QMessageBox::information(0, tr("Processing metadata..."), tr("Please wait while parsing metadata"), QMessageBox::Ok);
-      return;
-    }
+  if (m_isMagnet)
     disconnect(this, SLOT(updateMetadata(const QTorrentHandle&)));
-  }
-  if (!m_hasMetadata) {
-    // Metadata retrieval was cancelled
-    // Kill existing handle and make a new one
-    QBtSession::instance()->deleteTorrent(m_hash, true);
-  }
+
   Preferences pref;
   // Save Temporary data about torrent
   QString save_path = ui->save_path_combo->itemData(ui->save_path_combo->currentIndex()).toString();
@@ -626,6 +607,7 @@ void AddNewTorrentDialog::accept()
     // TODO: Check if destination actually exists
     TorrentTempData::setSeedingMode(m_hash, true);
   }
+  pref.addTorrentsInPause(!ui->start_torrent_cb->isChecked());
 
   // Label
   const QString label = ui->label_combo->currentText();
@@ -640,20 +622,12 @@ void AddNewTorrentDialog::accept()
   if (m_hasRenamedFile)
     TorrentTempData::setFilesPath(m_hash, m_filesPath);
 
-  // Temporary override of addInPause setting
-  bool old_addInPause = pref.addTorrentsInPause();
-  pref.addTorrentsInPause(!ui->start_torrent_cb->isChecked());
-  pref.sync();
-
   // Add torrent
-  if (!m_hasMetadata)
-    QBtSession::instance()->addMagnetUri(m_url, false);
+  if (m_isMagnet)
+    QBtSession::instance()->unhideMagnet(m_hash);
   else
     QBtSession::instance()->addTorrent(m_filePath, false, m_url);
 
-  // Restore addInPause setting
-  pref.addTorrentsInPause(old_addInPause);
-
   saveSavePathHistory();
   // Save settings
   pref.useAdditionDialog(!ui->never_show_cb->isChecked());
@@ -667,10 +641,6 @@ void AddNewTorrentDialog::accept()
 void AddNewTorrentDialog::reject() {
   if (m_isMagnet) {
     disconnect(this, SLOT(updateMetadata(const QTorrentHandle&)));
-    while (m_convertingMagnet) {
-      // HACK ???
-      // Force cancel
-    }
     setMetadataProgressIndicator(false);
     QBtSession::instance()->deleteTorrent(m_hash, true);
   }
@@ -682,30 +652,11 @@ void AddNewTorrentDialog::updateMetadata(const QTorrentHandle &h) {
     if (h.hash() != m_hash)
       return;
 
-    m_convertingMagnet = true;
+    disconnect(this, SLOT(updateMetadata(const QTorrentHandle&)));
     Q_ASSERT(h.has_metadata());
-    h.pause();
 
-    // Try to convert magnet to torrent with full metadata
-    m_filePath = QDir::tempPath() + h.hash() + ".torrent";
-    h.save_torrent_file(m_filePath);
-    if (!QFile::exists(m_filePath)) {
-      QMessageBox::warning(0, tr("I/O Error"), tr("Failed to save metadata.\nFile list will be unavailable."));
-      m_convertingMagnet = false;
-      setMetadataProgressIndicator(false, tr("Failed to save metadata"));
-      return;
-    }
+    m_torrentInfo = new torrent_info(h.get_torrent_info());
 
-    try {
-      m_torrentInfo = new torrent_info(m_filePath.toUtf8().data());
-      Q_ASSERT(m_hash == misc::toQString(m_torrentInfo->info_hash()));
-    } catch(const std::exception&) {
-      QMessageBox::critical(0, tr("Invalid metadata"), tr("Metadata corrupted.\nFile list will be unavailable."));
-      m_convertingMagnet = false;
-      setMetadataProgressIndicator(false, tr("Invalid metadata"));
-      return;
-    }
-    QBtSession::instance()->deleteTorrent(m_hash, true);
     // Good to go
     m_hasMetadata = true;
     setMetadataProgressIndicator(true, tr("Parsing metadata..."));
@@ -766,7 +717,6 @@ void AddNewTorrentDialog::updateMetadata(const QTorrentHandle &h) {
     showAdvancedSettings(settings.value("AddNewTorrentDialog/expanded").toBool());
     // Set dialog position
     setdialogPosition();
-    m_convertingMagnet = false;
     setMetadataProgressIndicator(false, tr("Metadata retrieval complete"));
   } catch (invalid_handle&) {
     QMessageBox::critical(0, tr("I/O Error"), ("Unknown error."));

src/addnewtorrentdialog.h

@@ -91,7 +91,6 @@ private:
   PropListDelegate *m_contentDelegate;
   bool m_isMagnet;
   bool m_hasMetadata;
-  bool m_convertingMagnet;
   QString m_filePath;
   QString m_url;
   QString m_hash;

src/qtlibtorrent/qbtsession.cpp

@@ -83,6 +83,8 @@
 
 //initialize static member variables
 QHash<QString, TorrentTempData::TorrentData> TorrentTempData::data = QHash<QString, TorrentTempData::TorrentData>();
+QStringList HiddenData::hashes = QStringList();
+unsigned int HiddenData::metadata_counter = 0;
 
 using namespace libtorrent;
 
@@ -426,9 +428,9 @@ void QBtSession::configureSession() {
 #endif
   // Queueing System
   if (pref.isQueueingSystemEnabled()) {
-    sessionSettings.active_downloads = pref.getMaxActiveDownloads();
+    sessionSettings.active_downloads = pref.getMaxActiveDownloads() + HiddenData::getDownloadingSize();
     sessionSettings.active_seeds = pref.getMaxActiveUploads();
-    sessionSettings.active_limit = pref.getMaxActiveTorrents();
+    sessionSettings.active_limit = pref.getMaxActiveTorrents() + HiddenData::getDownloadingSize();
     sessionSettings.dont_count_slow_torrents = pref.ignoreSlowTorrentsForQueueing();
     setQueueingEnabled(true);
   } else {
@@ -808,6 +810,8 @@ void QBtSession::deleteTorrent(const QString &hash, bool delete_local_files) {
     fsutils::forceRemove(torrentBackup.absoluteFilePath(file));
   }
   TorrentPersistentData::deletePersistentData(hash);
+  TorrentTempData::deleteTempData(hash);
+  HiddenData::deleteData(hash);
   // Remove tracker errors
   trackersInfos.remove(hash);
   if (delete_local_files)
@@ -984,13 +988,23 @@ QTorrentHandle QBtSession::addMagnetUri(QString magnet_uri, bool resumed, bool f
   if (!resumed) {
     loadTorrentTempData(h, savePath, true);
   }  
-  if (!pref.addTorrentsInPause()) {
+  if (HiddenData::hasData(hash) && pref.isQueueingSystemEnabled()) {
+    //Internally increase the queue limits to ensure that the magnet is started
+    libtorrent::session_settings sessionSettings(s->settings());
+    sessionSettings.active_downloads = pref.getMaxActiveDownloads() + HiddenData::getDownloadingSize();
+    sessionSettings.active_limit = pref.getMaxActiveTorrents() + HiddenData::getDownloadingSize();
+    s->set_settings(sessionSettings);
+    h.queue_position_top();
+  }
+  if (!pref.addTorrentsInPause() || HiddenData::hasData(hash)) {
     // Start torrent because it was added in paused state
     h.resume();
   }
   // Send torrent addition signal
   addConsoleMessage(tr("'%1' added to download list.", "'/home/y/xxx.torrent' was added to download list.").arg(magnet_uri));
-  emit addedTorrent(h);
+  if (!HiddenData::hasData(hash))
+    emit addedTorrent(h);
+
   return h;
 }
 
@@ -2385,7 +2399,20 @@ void QBtSession::readAlerts() {
       }
       else if (metadata_received_alert* p = dynamic_cast<metadata_received_alert*>(a.get())) {
         QTorrentHandle h(p->handle);
+        Preferences pref;
         if (h.is_valid()) {
+          QString hash(h.hash());
+          if (HiddenData::hasData(hash)) {
+            HiddenData::gotMetadata();
+            if (pref.isQueueingSystemEnabled()) {
+              //Internally decrease the queue limits to ensure that that other queued items aren't started
+              libtorrent::session_settings sessionSettings(s->settings());
+              sessionSettings.active_downloads = pref.getMaxActiveDownloads() + HiddenData::getDownloadingSize();
+              sessionSettings.active_limit = pref.getMaxActiveTorrents() + HiddenData::getDownloadingSize();
+              s->set_settings(sessionSettings);
+            }
+            h.pause();
+          }
           qDebug("Received metadata for %s", qPrintable(h.hash()));
           // Save metadata
           const QDir torrentBackup(fsutils::BTBackupLocation());
@@ -2398,8 +2425,12 @@ void QBtSession::readAlerts() {
           if (appendqBExtension)
             appendqBextensionToTorrent(h, true);
 
-          emit metadataReceived(h);
-          if (h.is_paused()) {
+          if (!HiddenData::hasData(hash))
+            emit metadataReceived(h);
+          else
+            emit metadataReceivedHidden(h);
+
+          if (h.is_paused() && !HiddenData::hasData(hash)) {
             // XXX: Unfortunately libtorrent-rasterbar does not send a torrent_paused_alert
             // and the torrent can be paused when metadata is received
             emit pausedTorrent(h);
@@ -2438,9 +2469,11 @@ void QBtSession::readAlerts() {
       else if (torrent_paused_alert* p = dynamic_cast<torrent_paused_alert*>(a.get())) {
         if (p->handle.is_valid()) {
           QTorrentHandle h(p->handle);
-          if (!h.has_error())
-            h.save_resume_data();
-          emit pausedTorrent(h);
+          if (!HiddenData::hasData(h.hash())) {
+            if (!h.has_error())
+              h.save_resume_data();
+            emit pausedTorrent(h);
+          }
         }
       }
       else if (tracker_error_alert* p = dynamic_cast<tracker_error_alert*>(a.get())) {
@@ -2922,3 +2955,42 @@ void QBtSession::backupPersistentData(const QString &hash, boost::shared_ptr<lib
   (*data)["qBt-queuePosition"] = TorrentPersistentData::getPriority(hash);
   (*data)["qBt-seedStatus"] = (int)TorrentPersistentData::isSeed(hash);
 }
+
+void QBtSession::unhideMagnet(const QString &hash) {
+  Preferences pref;
+  QTorrentHandle h(getTorrentHandle(hash));
+  if (!h.is_valid()) {
+    if (pref.isQueueingSystemEnabled()) {
+      //Internally decrease the queue limits to ensure that other queued items aren't started
+      libtorrent::session_settings sessionSettings(s->settings());
+      sessionSettings.active_downloads = pref.getMaxActiveDownloads() + HiddenData::getDownloadingSize();
+      sessionSettings.active_limit = pref.getMaxActiveTorrents() + HiddenData::getDownloadingSize();
+      s->set_settings(sessionSettings);
+    }
+    HiddenData::deleteData(hash);
+    TorrentTempData::deleteTempData(hash);
+    return;
+  }
+
+  if (!h.has_metadata()) {
+    if (pref.isQueueingSystemEnabled()) {
+      //Internally decrease the queue limits to ensure that other queued items aren't started
+      libtorrent::session_settings sessionSettings(s->settings());
+      sessionSettings.active_downloads = pref.getMaxActiveDownloads() + HiddenData::getDownloadingSize();
+      sessionSettings.active_limit = pref.getMaxActiveTorrents() + HiddenData::getDownloadingSize();
+      s->set_settings(sessionSettings);
+    }
+    if (pref.addTorrentsInPause())
+      h.pause();
+  }
+
+  h.queue_position_bottom();
+  loadTorrentTempData(h, h.save_path(), !h.has_metadata());
+
+  if (!pref.addTorrentsInPause())
+    h.resume();
+  HiddenData::deleteData(hash);
+  h.move_storage(TorrentTempData::getSavePath(hash));
+  TorrentTempData::deleteTempData(hash);
+  emit addedTorrent(h);
+}

src/qtlibtorrent/qbtsession.h

@@ -175,6 +175,7 @@ public slots:
   void configureSession();
   void banIP(QString ip);
   void recursiveTorrentDownload(const QTorrentHandle &h);
+  void unhideMagnet(const QString &hash);
 
 private:
   QString getSavePath(const QString &hash, bool fromScanDir = false, QString filePath = QString::null);
@@ -226,6 +227,7 @@ signals:
   void alternativeSpeedsModeChanged(bool alternative);
   void recursiveTorrentDownloadPossible(const QTorrentHandle &h);
   void ipFilterParsed(bool error, int ruleCount);
+  void metadataReceivedHidden(const QTorrentHandle &h);
 
 private:
   // Bittorrent

src/qtlibtorrent/torrentmodel.cpp

@@ -151,9 +151,14 @@ QVariant TorrentModelItem::data(int column, int role) const
   if (role != Qt::DisplayRole && role != Qt::UserRole) return QVariant();
   switch(column) {
   case TR_NAME:
-    return m_name.isEmpty()? m_torrent.name() : m_name;
-  case TR_PRIORITY:
-    return m_torrent.queue_position();
+    return m_name.isEmpty() ? m_torrent.name() : m_name;
+  case TR_PRIORITY: {
+    int pos = m_torrent.queue_position();
+    if (pos > -1)
+      return pos - HiddenData::getSize();
+    else
+      return pos;
+  }
   case TR_SIZE:
     return m_torrent.has_metadata() ? static_cast<qlonglong>(m_torrent.actual_size()) : -1;
   case TR_PROGRESS:

src/torrentpersistentdata.h

@@ -114,6 +114,38 @@ private:
   static QHash<QString, TorrentData> data;
 };
 
+class HiddenData {
+public:
+  static void addData(const QString &hash) {
+    hashes.append(hash);
+  }
+
+  static bool hasData(const QString &hash) {
+    return hashes.contains(hash, Qt::CaseInsensitive);
+  }
+
+  static void deleteData(const QString &hash) {
+    if (hashes.removeAll(hash))
+      metadata_counter--;
+  }
+
+  static int getSize() {
+    return hashes.size();
+  }
+
+  static int getDownloadingSize() {
+    return hashes.size() - metadata_counter;
+  }
+
+  static void gotMetadata() {
+    metadata_counter++;
+  }
+
+private:
+  static QStringList hashes;
+  static unsigned int metadata_counter;
+};
+
 class TorrentPersistentData {
 public:
   enum RatioLimit {