fix: update changed dates after setting torrent queue position (#8298)

libtransmission/torrent-queue.cc

@@ -64,34 +64,42 @@ size_t tr_torrent_queue::get_pos(tr_torrent_id_t const id)
     return pos_cache_[uid];
 }
 
-void tr_torrent_queue::set_pos(tr_torrent_id_t const id, size_t new_pos)
+// returns the list of torrent IDs whose queue position changed
+std::vector<tr_torrent_id_t> tr_torrent_queue::set_pos(tr_torrent_id_t const id, size_t new_pos)
 {
     auto const old_pos = get_pos(id);
     auto const n_queue = std::size(queue_);
     if (old_pos >= n_queue || queue_[old_pos] != id)
     {
-        return;
+        return {};
     }
 
     new_pos = std::min(new_pos, n_queue - 1U);
 
     if (old_pos == new_pos)
     {
-        return;
+        return {};
     }
 
+    auto ret = std::vector<tr_torrent_id_t>{};
+
     auto const begin = std::begin(queue_);
     auto const old_it = std::next(begin, old_pos);
-    auto const next_it = std::next(old_it);
+    auto const old_next_it = std::next(old_it);
     auto const new_it = std::next(begin, new_pos);
     if (old_pos > new_pos)
     {
-        std::rotate(new_it, old_it, next_it);
+        ret.assign(new_it, old_next_it);
+        std::rotate(new_it, old_it, old_next_it);
     }
     else
     {
-        std::rotate(old_it, next_it, std::next(new_it));
+        auto const new_next_it = std::next(new_it);
+        ret.assign(old_it, new_next_it);
+        std::rotate(old_it, old_next_it, new_next_it);
     }
+
+    return ret;
 }
 
 bool tr_torrent_queue::to_file() const

libtransmission/torrent-queue.h

@@ -41,7 +41,7 @@ public:
     void remove(tr_torrent_id_t id);
 
     [[nodiscard]] size_t get_pos(tr_torrent_id_t id);
-    void set_pos(tr_torrent_id_t id, size_t new_pos);
+    [[nodiscard]] std::vector<tr_torrent_id_t> set_pos(tr_torrent_id_t id, size_t new_pos);
 
     bool to_file() const; // NOLINT(modernize-use-nodiscard)
     [[nodiscard]] std::vector<std::string> from_file();

libtransmission/torrent.h

@@ -991,9 +991,15 @@ struct tr_torrent
         return session->torrent_queue().get_pos(id());
     }
 
-    void set_queue_position(size_t new_pos) // NOLINT(readability-make-member-function-const)
+    void set_queue_position(size_t const new_pos) // NOLINT(readability-make-member-function-const)
     {
-        session->torrent_queue().set_pos(id(), new_pos);
+        for (auto const& changed_id : session->torrent_queue().set_pos(id(), new_pos))
+        {
+            if (auto* const tor = session->torrents().get(changed_id))
+            {
+                tor->mark_changed();
+            }
+        }
     }
 
     static constexpr struct

tests/libtransmission/torrent-queue-test.cc

@@ -91,6 +91,17 @@ TEST_F(TorrentQueueTest, addRemoveToFromQueue)
 TEST_F(TorrentQueueTest, setQueuePos)
 {
     static auto constexpr QueuePos = std::array{ 1U, 3U, 0U, 2U };
+    static auto const ExpectedChangedIds = std::array<std::vector<tr_torrent_id_t>, std::size(QueuePos)>{ {
+        // Queue order: 1, 2, 3, 4
+        { 1, 2 },
+        // Queue order: 2, 1, 3, 4
+        { 1, 2, 3, 4 },
+        // Queue order: 1, 3, 4, 2
+        { 1, 3 },
+        // Queue order: 3, 1, 4, 2
+        {},
+        // Queue order: 3, 1, 4, 2
+    } };
 
     auto queue = tr_torrent_queue{ mediator_ };
 
@@ -116,8 +127,11 @@ TEST_F(TorrentQueueTest, setQueuePos)
     {
         auto const id = owned[i]->id();
         auto const pos = QueuePos[i];
-        queue.set_pos(id, pos);
+        auto changed_ids = queue.set_pos(id, pos);
+        std::sort(std::begin(changed_ids), std::end(changed_ids));
         EXPECT_EQ(queue.get_pos(id), pos);
+        EXPECT_EQ(changed_ids, ExpectedChangedIds[i]);
+        EXPECT_EQ(std::adjacent_find(std::begin(changed_ids), std::end(changed_ids)), std::end(changed_ids)); // check if unique
     }
 
     for (size_t i = 0; i < std::size(owned); ++i)