/*
 * Copyright 2015, Axel Dörfler, axeld@pinc-software.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef NETWORK_WATCHER_H
#define NETWORK_WATCHER_H


#include <Handler.h>
#include <ObjectList.h>


class NetworkListener {
public:
        virtual                                         ~NetworkListener();

        virtual void                            NetworkAvailabilityChanged(bool available) = 0;
};


class NetworkWatcher : public BHandler {
public:
                                                                NetworkWatcher();
        virtual                                         ~NetworkWatcher();

                        void                            AddListener(NetworkListener* listener);
                        void                            RemoveListener(NetworkListener* listener);
                        int32                           CountListeners() const;

        virtual void                            MessageReceived(BMessage* message);

        static  void                            Register(NetworkListener* listener);
        static  void                            Unregister(NetworkListener* listener);

        static  bool                            NetworkAvailable(bool immediate);

protected:
                        void                            UpdateAvailability();

protected:
                        BObjectList<NetworkListener>
                                                                fListeners;
                        bool                            fAvailable;
};


#endif // NETWORK_WATCHER_H