Fix received metadata handling

src/base/bittorrent/nativetorrentextension.cpp

@@ -52,3 +52,11 @@ bool NativeTorrentExtension::on_pause()
     // and other extensions to be also invoked.
     return false;
 }
+
+void NativeTorrentExtension::on_state(const lt::torrent_status::state_t state)
+{
+    if (m_state == lt::torrent_status::downloading_metadata)
+        m_torrentHandle.set_flags(lt::torrent_flags::stop_when_ready);
+
+    m_state = state;
+}

src/base/bittorrent/nativetorrentextension.h

@@ -38,6 +38,8 @@ public:
 
 private:
     bool on_pause() override;
+    void on_state(lt::torrent_status::state_t state) override;
 
     lt::torrent_handle m_torrentHandle;
+    lt::torrent_status::state_t m_state = lt::torrent_status::checking_resume_data;
 };

src/base/bittorrent/session.cpp

@@ -1774,6 +1774,13 @@ void Session::handleDownloadFinished(const Net::DownloadResult &result)
 
 void Session::fileSearchFinished(const InfoHash &id, const QString &savePath, const QStringList &fileNames)
 {
+    TorrentHandleImpl *torrent = m_torrents.value(id);
+    if (torrent)
+    {
+        torrent->fileSearchFinished(savePath, fileNames);
+        return;
+    }
+
     const auto loadingTorrentsIter = m_loadingTorrents.find(id);
     if (loadingTorrentsIter != m_loadingTorrents.end())
     {
@@ -4595,7 +4602,7 @@ void Session::createTorrentHandle(const lt::torrent_handle &nativeHandle)
 
     const LoadTorrentParams params = m_loadingTorrents.take(nativeHandle.info_hash());
 
-    auto *const torrent = new TorrentHandleImpl {this, nativeHandle, params};
+    auto *const torrent = new TorrentHandleImpl {this, m_nativeSession, nativeHandle, params};
     m_torrents.insert(torrent->hash(), torrent);
 
     const bool hasMetadata = torrent->hasMetadata();

src/base/bittorrent/torrenthandleimpl.cpp

@@ -41,6 +41,7 @@
 #include <libtorrent/alert_types.hpp>
 #include <libtorrent/entry.hpp>
 #include <libtorrent/magnet_uri.hpp>
+#include <libtorrent/session.hpp>
 #include <libtorrent/storage_defs.hpp>
 #include <libtorrent/time.hpp>
 #include <libtorrent/version.hpp>
@@ -101,10 +102,11 @@ namespace
 
 // TorrentHandleImpl
 
-TorrentHandleImpl::TorrentHandleImpl(Session *session, const lt::torrent_handle &nativeHandle,
+TorrentHandleImpl::TorrentHandleImpl(Session *session, lt::session *nativeSession
-                                     const LoadTorrentParams &params)
+                                     , const lt::torrent_handle &nativeHandle, const LoadTorrentParams &params)
     : QObject(session)
     , m_session(session)
+    , m_nativeSession(nativeSession)
     , m_nativeHandle(nativeHandle)
     , m_name(params.name)
     , m_savePath(Utils::Fs::toNativePath(params.savePath))
@@ -124,7 +126,12 @@ TorrentHandleImpl::TorrentHandleImpl(Session *session, const lt::torrent_handle
         m_savePath = Utils::Fs::toNativePath(m_session->categorySavePath(m_category));
 
     m_hash = InfoHash {m_nativeHandle.info_hash()};
+    if (m_ltAddTorrentParams.ti)
+    {
+        // Initialize it only if torrent is added with metadata.
+        // Otherwise it should be initialized in "Metadata received" handler.
         m_torrentInfo = TorrentInfo {m_nativeHandle.torrent_file()};
+    }
 
     updateStatus();
 
@@ -648,7 +655,9 @@ bool TorrentHandleImpl::isPaused() const
 bool TorrentHandleImpl::isQueued() const
 {
     // Torrent is Queued if it isn't in Paused state but paused internally
-    return ((m_nativeStatus.flags & lt::torrent_flags::paused) && !isPaused());
+    return (!isPaused()
+            && (m_nativeStatus.flags & lt::torrent_flags::auto_managed)
+            && (m_nativeStatus.flags & lt::torrent_flags::paused));
 }
 
 bool TorrentHandleImpl::isChecking() const
@@ -755,6 +764,15 @@ void TorrentHandleImpl::updateState()
     {
         m_state = TorrentState::Error;
     }
+    else if (!hasMetadata())
+    {
+        if (isPaused())
+            m_state = TorrentState::PausedDownloading;
+        else if (m_session->isQueueingSystemEnabled() && isQueued())
+            m_state = TorrentState::QueuedDownloading;
+        else
+            m_state = TorrentState::DownloadingMetadata;
+    }
     else if ((m_nativeStatus.state == lt::torrent_status::checking_files)
              && (!isPaused() || (m_nativeStatus.flags & lt::torrent_flags::auto_managed)
                  || !(m_nativeStatus.flags & lt::torrent_flags::paused)))
@@ -781,8 +799,6 @@ void TorrentHandleImpl::updateState()
             m_state = TorrentState::PausedDownloading;
         else if (m_session->isQueueingSystemEnabled() && isQueued())
             m_state = TorrentState::QueuedDownloading;
-        else if (m_nativeStatus.state == lt::torrent_status::downloading_metadata) // must come after queue check
-            m_state = TorrentState::DownloadingMetadata;
         else if (isForced())
             m_state = TorrentState::ForcedDownloading;
         else if (m_nativeStatus.download_payload_rate > 0)
@@ -896,6 +912,9 @@ qlonglong TorrentHandleImpl::eta() const
 
 QVector<qreal> TorrentHandleImpl::filesProgress() const
 {
+    if (!hasMetadata())
+        return {};
+
     std::vector<int64_t> fp;
     m_nativeHandle.file_progress(fp, lt::torrent_handle::piece_granularity);
 
@@ -1283,18 +1302,66 @@ void TorrentHandleImpl::applyFirstLastPiecePriority(const bool enabled, const QV
     m_nativeHandle.prioritize_pieces(piecePriorities);
 }
 
-void TorrentHandleImpl::pause()
+void TorrentHandleImpl::fileSearchFinished(const QString &savePath, const QStringList &fileNames)
 {
-    setAutoManaged(false);
+    endReceivedMetadataHandling(savePath, fileNames);
-    m_nativeHandle.pause();
+}
 
-    m_speedMonitor.reset();
+void TorrentHandleImpl::endReceivedMetadataHandling(const QString &savePath, const QStringList &fileNames)
+{
+    const auto queuePos = m_nativeHandle.queue_position();
 
+    lt::add_torrent_params p = m_ltAddTorrentParams;
+    p.ti = std::const_pointer_cast<lt::torrent_info>(m_nativeHandle.torrent_file());
+
+    m_nativeSession->remove_torrent(m_nativeHandle, lt::session::delete_partfile);
+
+    for (int i = 0; i < fileNames.size(); ++i)
+        p.renamed_files[lt::file_index_t {i}] = fileNames[i].toStdString();
+
+    p.save_path = Utils::Fs::toNativePath(savePath).toStdString();
+    p.flags |= lt::torrent_flags::update_subscribe
+            | lt::torrent_flags::override_trackers
+            | lt::torrent_flags::override_web_seeds;
+
+    m_nativeHandle = m_nativeSession->add_torrent(p);
+    m_nativeHandle.queue_position_set(queuePos);
+
+    // If first/last piece priority was specified when adding this torrent,
+    // we should apply it now that we have metadata:
+    if (m_hasFirstLastPiecePriority)
+        applyFirstLastPiecePriority(true);
+
+    if (!m_isStopped)
+    {
+        setAutoManaged(m_operatingMode == TorrentOperatingMode::AutoManaged);
+        if (m_operatingMode == TorrentOperatingMode::Forced)
+            m_nativeHandle.resume();
+    }
+
+    m_torrentInfo = TorrentInfo {m_nativeHandle.torrent_file()};
+    m_maintenanceJob = MaintenanceJob::None;
+
+    updateStatus();
+
+    m_session->handleTorrentMetadataReceived(this);
+}
+
+void TorrentHandleImpl::pause()
+{
     if (!m_isStopped)
     {
         m_isStopped = true;
         m_session->handleTorrentPaused(this);
     }
+
+    if (m_maintenanceJob == MaintenanceJob::None)
+    {
+        setAutoManaged(false);
+        m_nativeHandle.pause();
+
+        m_speedMonitor.reset();
+    }
 }
 
 void TorrentHandleImpl::resume(const TorrentOperatingMode mode)
@@ -1308,24 +1375,24 @@ void TorrentHandleImpl::resume(const TorrentOperatingMode mode)
         m_nativeHandle.force_recheck();
     }
 
+    m_operatingMode = mode;
+
     if (m_isStopped)
     {
         // Torrent may have been temporarily resumed to perform checking files
         // so we have to ensure it will not pause after checking is done.
         m_nativeHandle.unset_flags(lt::torrent_flags::stop_when_ready);
-    }
-
-    setAutoManaged(mode == TorrentOperatingMode::AutoManaged);
-    if (mode == TorrentOperatingMode::Forced)
-        m_nativeHandle.resume();
 
-    m_operatingMode = mode;
-
-    if (m_isStopped)
-    {
         m_isStopped = false;
         m_session->handleTorrentResumed(this);
     }
+
+    if (m_maintenanceJob == MaintenanceJob::None)
+    {
+        setAutoManaged(m_operatingMode == TorrentOperatingMode::AutoManaged);
+        if (m_operatingMode == TorrentOperatingMode::Forced)
+            m_nativeHandle.resume();
+    }
 }
 
 void TorrentHandleImpl::moveStorage(const QString &newPath, const MoveStorageMode mode)
@@ -1410,7 +1477,15 @@ void TorrentHandleImpl::handleTrackerErrorAlert(const lt::tracker_error_alert *p
 void TorrentHandleImpl::handleTorrentCheckedAlert(const lt::torrent_checked_alert *p)
 {
     Q_UNUSED(p);
-    qDebug("\"%s\" have just finished checking", qUtf8Printable(name()));
+    qDebug("\"%s\" have just finished checking.", qUtf8Printable(name()));
+
+
+    if (!hasMetadata())
+    {
+        // The torrent is checked due to metadata received, but we should not process
+        // this event until the torrent is reloaded using the received metadata.
+        return;
+    }
 
     if (m_fastresumeDataRejected && !m_hasMissingFiles)
     {
@@ -1500,6 +1575,18 @@ void TorrentHandleImpl::handleSaveResumeDataAlert(const lt::save_resume_data_ale
     m_ltAddTorrentParams.save_path = Profile::instance()->toPortablePath(
                 QString::fromStdString(m_ltAddTorrentParams.save_path)).toStdString();
 
+    if (m_maintenanceJob == MaintenanceJob::HandleMetadata)
+    {
+        m_ltAddTorrentParams.have_pieces.clear();
+        m_ltAddTorrentParams.verified_pieces.clear();
+
+        TorrentInfo metadata = TorrentInfo {m_nativeHandle.torrent_file()};
+        if (!m_hasRootFolder)
+            metadata.stripRootFolder();
+
+        m_session->findIncompleteFiles(metadata, m_savePath);
+    }
+
     auto resumeDataPtr = std::make_shared<lt::entry>(lt::write_resume_data(m_ltAddTorrentParams));
     lt::entry &resumeData = *resumeDataPtr;
 
@@ -1643,20 +1730,9 @@ void TorrentHandleImpl::handleMetadataReceivedAlert(const lt::metadata_received_
     Q_UNUSED(p);
 
     qDebug("Metadata received for torrent %s.", qUtf8Printable(name()));
-    m_torrentInfo = TorrentInfo {m_nativeHandle.torrent_file()};
-
-    if (m_session->isAppendExtensionEnabled())
-        manageIncompleteFiles();
-    if (!m_hasRootFolder)
-        m_torrentInfo.stripRootFolder();
-    if (filesCount() == 1)
-        m_hasRootFolder = false;
-    m_session->handleTorrentMetadataReceived(this);
 
-    // If first/last piece priority was specified when adding this torrent,
+    m_maintenanceJob = MaintenanceJob::HandleMetadata;
-    // we should apply it now that we have metadata:
+    saveResumeData();
-    if (m_hasFirstLastPiecePriority)
-        applyFirstLastPiecePriority(true);
 }
 
 void TorrentHandleImpl::handlePerformanceAlert(const lt::performance_alert *p) const
@@ -1828,18 +1904,20 @@ void TorrentHandleImpl::updateStatus()
 void TorrentHandleImpl::updateStatus(const lt::torrent_status &nativeStatus)
 {
     m_nativeStatus = nativeStatus;
-
     updateState();
 
+    m_speedMonitor.addSample({nativeStatus.download_payload_rate
+                              , nativeStatus.upload_payload_rate});
+
+    if (hasMetadata())
+    {
         // NOTE: Don't change the order of these conditionals!
         // Otherwise it will not work properly since torrent can be CheckingDownloading.
         if (isChecking())
             m_unchecked = false;
         else if (isDownloading())
             m_unchecked = true;
-
+    }
-    m_speedMonitor.addSample({nativeStatus.download_payload_rate
-        , nativeStatus.upload_payload_rate});
 }
 
 void TorrentHandleImpl::setRatioLimit(qreal limit)

src/base/bittorrent/torrenthandleimpl.h

@@ -80,14 +80,20 @@ namespace BitTorrent
         Overwrite
     };
 
+    enum class MaintenanceJob
+    {
+        None,
+        HandleMetadata
+    };
+
     class TorrentHandleImpl final : public QObject, public TorrentHandle
     {
         Q_DISABLE_COPY(TorrentHandleImpl)
         Q_DECLARE_TR_FUNCTIONS(BitTorrent::TorrentHandleImpl)
 
     public:
-        TorrentHandleImpl(Session *session, const lt::torrent_handle &nativeHandle,
+        TorrentHandleImpl(Session *session, lt::session *nativeSession
-                          const LoadTorrentParams &params);
+                          , const lt::torrent_handle &nativeHandle, const LoadTorrentParams &params);
         ~TorrentHandleImpl() override;
 
         bool isValid() const;
@@ -241,6 +247,7 @@ namespace BitTorrent
         void handleAppendExtensionToggled();
         void saveResumeData();
         void handleMoveStorageJobFinished(bool hasOutstandingJob);
+        void fileSearchFinished(const QString &savePath, const QStringList &fileNames);
 
         QString actualStorageLocation() const;
 
@@ -278,7 +285,10 @@ namespace BitTorrent
         void manageIncompleteFiles();
         void applyFirstLastPiecePriority(bool enabled, const QVector<DownloadPriority> &updatedFilePrio = {});
 
+        void endReceivedMetadataHandling(const QString &savePath, const QStringList &fileNames);
+
         Session *const m_session;
+        lt::session *m_nativeSession;
         lt::torrent_handle m_nativeHandle;
         lt::torrent_status m_nativeStatus;
         TorrentState m_state = TorrentState::Unknown;
@@ -293,6 +303,8 @@ namespace BitTorrent
         int m_renameCount = 0;
         bool m_storageIsMoving = false;
 
+        MaintenanceJob m_maintenanceJob = MaintenanceJob::None;
+
         // Until libtorrent provide an "old_name" field in `file_renamed_alert`
         // we will rely on this workaround to remove empty leftover folders
         QHash<lt::file_index_t, QVector<QString>> m_oldPath;