comm_navmsg_bus.h

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/**************************************************************************
 *   Copyright (C) 2022 by David Register                                  *
 *   Copyright (C) 2022 Alec Leamas                                        *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, see <https://www.gnu.org/licenses/>. *
 **************************************************************************/

 
#ifndef NAVMSG_BUS_H_
#define NAVMSG_BUS_H_
 
#include <memory>
#include <mutex>
#include <set>
#include <string>
 
#include <wx/event.h>
 
#include "model/comm_driver.h"
#include "observable/evtvar.h"

class NavMsgBus : public wxEvtHandler, public DriverListener {
public:
  /* Singleton implementation. */
  static NavMsgBus& GetInstance();
 
  NavMsgBus& operator=(NavMsgBus&) = delete;
  NavMsgBus(const NavMsgBus&) = delete;

  void SendMessage(std::shared_ptr<const NavMsg> message,
                   std::shared_ptr<const NavAddr> address);

  bool RegisterKey(const std::string& key);

  void Notify(std::shared_ptr<const NavMsg> message);
 
  /* DriverListener implementation: */
  void Notify(const AbstractCommDriver& driver);

  const std::set<std::string>& GetActiveMessages() { return m_active_messages; }

  obs::EventVar new_msg_event;
 
private:
  std::mutex m_mutex;
  NavMsgBus() = default;
 
  std::set<std::string> m_active_messages;
};
 
#endif  // NAVMSG_BUS_H_