Try to detect system wake-up event

PR #18934.
Closes #17898.

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();

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();