Merge pull request #14354 from glassez/missing-files

Improve handling of "missing files" torrents

src/base/bittorrent/torrentimpl.cpp

@@ -1387,6 +1387,7 @@ void TorrentImpl::resume(const TorrentOperatingMode mode)
     {
         m_hasMissingFiles = false;
         m_isStopped = false;
+        m_ltAddTorrentParams.ti = std::const_pointer_cast<lt::torrent_info>(m_nativeHandle.torrent_file());
         reload();
         updateStatus();
         return;
@@ -1446,8 +1447,21 @@ void TorrentImpl::handleMoveStorageJobFinished(const bool hasOutstandingJob)
 
     saveResumeData();
 
-    while ((m_renameCount == 0) && !m_moveFinishedTriggers.isEmpty())
-        m_moveFinishedTriggers.takeFirst()();
+    if (!m_storageIsMoving)
+    {
+        if (m_hasMissingFiles)
+        {
+            // it can be moved to the proper location
+            m_hasMissingFiles = false;
+            m_ltAddTorrentParams.save_path = m_nativeStatus.save_path;
+            m_ltAddTorrentParams.ti = std::const_pointer_cast<lt::torrent_info>(m_nativeHandle.torrent_file());
+            reload();
+            updateStatus();
+        }
+
+        while ((m_renameCount == 0) && !m_moveFinishedTriggers.isEmpty())
+            m_moveFinishedTriggers.takeFirst()();
+    }
 }
 
 void TorrentImpl::handleTrackerReplyAlert(const lt::tracker_reply_alert *p)
@@ -1565,7 +1579,19 @@ void TorrentImpl::handleTorrentResumedAlert(const lt::torrent_resumed_alert *p)
 
 void TorrentImpl::handleSaveResumeDataAlert(const lt::save_resume_data_alert *p)
 {
-    if (!m_hasMissingFiles)
+    if (m_hasMissingFiles)
+    {
+        const auto havePieces = m_ltAddTorrentParams.have_pieces;
+        const auto unfinishedPieces = m_ltAddTorrentParams.unfinished_pieces;
+        const auto verifiedPieces = m_ltAddTorrentParams.verified_pieces;
+
+        // Update recent resume data but preserve existing progress
+        m_ltAddTorrentParams = p->params;
+        m_ltAddTorrentParams.have_pieces = havePieces;
+        m_ltAddTorrentParams.unfinished_pieces = unfinishedPieces;
+        m_ltAddTorrentParams.verified_pieces = verifiedPieces;
+    }
+    else
     {
         // Update recent resume data
         m_ltAddTorrentParams = p->params;