From 95b02bbb2ef6b46cc5504fc626dd30af54f42749 Mon Sep 17 00:00:00 2001
From: thalieht <eretrus@outlook.com>
Date: Thu, 23 Aug 2018 07:38:08 +0300
Subject: [PATCH] Save fastresumes when changing torrent priorities

---
 src/base/bittorrent/session.cpp | 20 ++++++++++++++++++++
 src/base/bittorrent/session.h   |  1 +
 2 files changed, 21 insertions(+)

diff --git a/src/base/bittorrent/session.cpp b/src/base/bittorrent/session.cpp
index 74f401b0c..01daf8da7 100644
--- a/src/base/bittorrent/session.cpp
+++ b/src/base/bittorrent/session.cpp
@@ -1998,6 +1998,8 @@ void Session::increaseTorrentsPriority(const QStringList &hashes)
         torrentQueuePositionUp(torrent->nativeHandle());
         torrentQueue.pop();
     }
+
+    handleTorrentsPrioritiesChanged();
 }
 
 void Session::decreaseTorrentsPriority(const QStringList &hashes)
@@ -2022,6 +2024,8 @@ void Session::decreaseTorrentsPriority(const QStringList &hashes)
 
     for (auto i = m_loadedMetadata.cbegin(); i != m_loadedMetadata.cend(); ++i)
         torrentQueuePositionBottom(m_nativeSession->find_torrent(i.key()));
+
+    handleTorrentsPrioritiesChanged();
 }
 
 void Session::topTorrentsPriority(const QStringList &hashes)
@@ -2043,6 +2047,8 @@ void Session::topTorrentsPriority(const QStringList &hashes)
         torrentQueuePositionTop(torrent->nativeHandle());
         torrentQueue.pop();
     }
+
+    handleTorrentsPrioritiesChanged();
 }
 
 void Session::bottomTorrentsPriority(const QStringList &hashes)
@@ -2067,6 +2073,8 @@ void Session::bottomTorrentsPriority(const QStringList &hashes)
 
     for (auto i = m_loadedMetadata.cbegin(); i != m_loadedMetadata.cend(); ++i)
         torrentQueuePositionBottom(m_nativeSession->find_torrent(i.key()));
+
+    handleTorrentsPrioritiesChanged();
 }
 
 QHash<InfoHash, TorrentHandle *> Session::torrents() const
@@ -3531,6 +3539,18 @@ void Session::handleTorrentShareLimitChanged(TorrentHandle *const torrent)
     updateSeedingLimitTimer();
 }
 
+void Session::handleTorrentsPrioritiesChanged()
+{
+    // Save fastresume for the torrents that changed queue position
+    for (TorrentHandle *const torrent : torrents()) {
+        if (!torrent->isSeed()) {
+            // cached vs actual queue position, qBt starts queue at 1
+            if (torrent->queuePosition() != (torrent->nativeHandle().queue_position() + 1))
+                saveTorrentResumeData(torrent);
+        }
+    }
+}
+
 void Session::saveTorrentResumeData(TorrentHandle *const torrent)
 {
     qDebug("Saving fastresume data for %s", qUtf8Printable(torrent->name()));
diff --git a/src/base/bittorrent/session.h b/src/base/bittorrent/session.h
index cd43b0158..c4cd2185f 100644
--- a/src/base/bittorrent/session.h
+++ b/src/base/bittorrent/session.h
@@ -481,6 +481,7 @@ namespace BitTorrent
 
         // TorrentHandle interface
         void handleTorrentShareLimitChanged(TorrentHandle *const torrent);
+        void handleTorrentsPrioritiesChanged();
         void handleTorrentNameChanged(TorrentHandle *const torrent);
         void handleTorrentSavePathChanged(TorrentHandle *const torrent);
         void handleTorrentCategoryChanged(TorrentHandle *const torrent, const QString &oldCategory);