public:

using EventKey = std::string;

using EventNotifier =

std::function<void(v8::Local<v8::Context>, v8::Local<v8::Object>)>;

NotificationEmitter();

virtual ~NotificationEmitter() = default;

void emitNotification(v8::Local<v8::Context> context,

const EventKey& event,

v8::Local<v8::Object> params);

virtual bool canEmit(const std::string& domain) = 0;

NotificationEmitter(const NotificationEmitter&) = delete;

NotificationEmitter& operator=(const NotificationEmitter&) = delete;

protected:

void addEventNotifier(const EventKey& event, EventNotifier notifier);

private:

std::unordered_map<EventKey, EventNotifier> event_notifier_map_ = {};