Fetch torrent status when generating final fastresume data

This is done to get correct queue position, which has to be written into
the fastresume file. See discussion in #6154.

src/base/bittorrent/session.cpp

@@ -1858,7 +1858,7 @@ void Session::generateResumeData(bool final)
         if (torrent->isChecking() || torrent->hasError()) continue;
         if (!final && !torrent->needSaveResumeData()) continue;
 
-        saveTorrentResumeData(torrent);
+        saveTorrentResumeData(torrent, final);
         qDebug("Saving fastresume data for %s", qPrintable(torrent->name()));
     }
 }
@@ -2782,9 +2782,9 @@ void Session::handleTorrentRatioLimitChanged(TorrentHandle *const torrent)
     updateRatioTimer();
 }
 
-void Session::saveTorrentResumeData(TorrentHandle *const torrent)
+void Session::saveTorrentResumeData(TorrentHandle *const torrent, bool finalSave)
 {
-    torrent->saveResumeData();
+    torrent->saveResumeData(finalSave);
     ++m_numResumeData;
 }
 

src/base/bittorrent/session.h

@@ -467,7 +467,7 @@ namespace BitTorrent
 
         void updateRatioTimer();
         void exportTorrentFile(TorrentHandle *const torrent, TorrentExportFolder folder = TorrentExportFolder::Regular);
-        void saveTorrentResumeData(TorrentHandle *const torrent);
+        void saveTorrentResumeData(TorrentHandle *const torrent, bool finalSave = false);
 
         void handleAlert(libtorrent::alert *a);
         void dispatchTorrentAlert(libtorrent::alert *a);

src/base/bittorrent/torrenthandle.cpp

@@ -485,8 +485,11 @@ bool TorrentHandle::needSaveResumeData() const
     SAFE_RETURN(bool, need_save_resume_data, false);
 }
 
-void TorrentHandle::saveResumeData()
+void TorrentHandle::saveResumeData(bool updateStatus)
 {
+    if (updateStatus) // to update queue_position, see discussion in PR #6154
+        this->updateStatus();
+
     SAFE_CALL(save_resume_data);
     m_needSaveResumeData = false;
 }

src/base/bittorrent/torrenthandle.h

@@ -351,7 +351,7 @@ namespace BitTorrent
         void handleTempPathChanged();
         void handleCategorySavePathChanged();
         void handleAppendExtensionToggled();
-        void saveResumeData();
+        void saveResumeData(bool updateStatus = false);
 
     private:
         typedef boost::function<void ()> EventTrigger;