From 58ae98026be6b6e3faec748bdb35d04c09abed0d Mon Sep 17 00:00:00 2001
From: Vladimir Golovnev <glassez@yandex.ru>
Date: Wed, 10 May 2023 15:02:15 +0300
Subject: [PATCH] Try to detect system wake-up event

PR #18934.
Closes #17898.
---
 src/base/bittorrent/sessionimpl.cpp | 15 +++++++++++++++
 src/base/bittorrent/sessionimpl.h   |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/src/base/bittorrent/sessionimpl.cpp b/src/base/bittorrent/sessionimpl.cpp
index 80ee809ea..f23e43649 100644
--- a/src/base/bittorrent/sessionimpl.cpp
+++ b/src/base/bittorrent/sessionimpl.cpp
@@ -1470,6 +1470,21 @@ void SessionImpl::endStartup(ResumeSessionContext *context)
             m_resumeDataTimer->start();
         }
 
+        m_wakeupCheckTimer = new QTimer(this);
+        connect(m_wakeupCheckTimer, &QTimer::timeout, this, [this]
+        {
+            const auto now = QDateTime::currentDateTime();
+            if (m_wakeupCheckTimestamp.secsTo(now) > 100)
+            {
+                LogMsg(tr("System wake-up event detected. Re-announcing to all the trackers..."));
+                reannounceToAllTrackers();
+            }
+
+            m_wakeupCheckTimestamp = QDateTime::currentDateTime();
+        });
+        m_wakeupCheckTimestamp = QDateTime::currentDateTime();
+        m_wakeupCheckTimer->start(30s);
+
         m_isRestored = true;
         emit startupProgressUpdated(100);
         emit restored();
diff --git a/src/base/bittorrent/sessionimpl.h b/src/base/bittorrent/sessionimpl.h
index 257437aa0..4b921c19c 100644
--- a/src/base/bittorrent/sessionimpl.h
+++ b/src/base/bittorrent/sessionimpl.h
@@ -38,6 +38,7 @@
 #include <libtorrent/torrent_handle.hpp>
 
 #include <QtContainerFwd>
+#include <QDateTime>
 #include <QElapsedTimer>
 #include <QHash>
 #include <QPointer>
@@ -773,6 +774,9 @@ namespace BitTorrent
         bool m_isPortMappingEnabled = false;
         QHash<quint16, std::vector<lt::port_mapping_t>> m_mappedPorts;
 
+        QTimer *m_wakeupCheckTimer = nullptr;
+        QDateTime m_wakeupCheckTimestamp;
+
         friend void Session::initInstance();
         friend void Session::freeInstance();
         friend Session *Session::instance();