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src/device_bus/monitor/IDeviceMonitor.h

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+#pragma once
+
+#include <functional>
+#include <vector>
+
+#include <QObject>
+
+#include "device_bus/monitor/DeviceEvent.h"
+
+namespace softbus::device_bus::monitor
+{
+
+class IDeviceMonitor : public QObject
+{
+    Q_OBJECT
+public:
+    using EventCallback = std::function<void(const DeviceEvent&)>;
+
+    explicit IDeviceMonitor(QObject* parent = nullptr)
+        : QObject(parent)
+    {
+    }
+    ~IDeviceMonitor() override = default;
+
+    virtual bool start() = 0;
+    virtual void stop() = 0;
+    virtual std::vector<DeviceEvent> snapshotExisting() = 0;
+
+    void setCallback(EventCallback cb) { m_cb = std::move(cb); }
+
+protected:
+    void emitEvent(const DeviceEvent& ev)
+    {
+        if (m_cb) {
+            m_cb(ev);
+        }
+        emit event(ev);
+    }
+
+signals:
+    void event(const softbus::device_bus::monitor::DeviceEvent& ev);
+
+private:
+    EventCallback m_cb;
+};
+
+} // namespace softbus::device_bus::monitor