[Linux] Start/Stop BLE scan when going to sleep

linux/systemsleepmonitor.hpp

@@ -0,0 +1,49 @@
+#ifndef SYSTEMSLEEPMONITOR_HPP
+#define SYSTEMSLEEPMONITOR_HPP
+
+#include <QObject>
+#include <QDBusConnection>
+#include <QDBusInterface>
+#include <QDBusMessage>
+#include <QDebug>
+
+class SystemSleepMonitor : public QObject {
+    Q_OBJECT
+
+public:
+    explicit SystemSleepMonitor(QObject *parent = nullptr) : QObject(parent) {
+        // Connect to the system D-Bus
+        QDBusConnection systemBus = QDBusConnection::systemBus();
+        if (!systemBus.isConnected()) {
+            qWarning() << "Cannot connect to system D-Bus";
+            return;
+        }
+
+        // Subscribe to PrepareForSleep signal from logind
+        systemBus.connect(
+            "org.freedesktop.login1",
+            "/org/freedesktop/login1",
+            "org.freedesktop.login1.Manager",
+            "PrepareForSleep",
+            this,
+            SLOT(handlePrepareForSleep(bool))
+        );
+    }
+
+    ~SystemSleepMonitor() override = default;
+
+signals:
+    void systemGoingToSleep();
+    void systemWakingUp();
+
+private slots:
+    void handlePrepareForSleep(bool sleeping) {
+        if (sleeping) {
+            emit systemGoingToSleep();
+        } else {
+            emit systemWakingUp();
+        }
+    }
+};
+
+#endif // SYSTEMSLEEPMONITOR_HPP