/home/runner/work/DCCEXSimpleThrottle/DCCEXSimpleThrottle/EventManager.h

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/*
 *  © 2024 Peter Cole
 *
 *  This 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  It 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 code.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef EVENTMANAGER_H
#define EVENTMANAGER_H
 
#include "EventListener.h"
#include "EventStructure.h"
 
class EventManager {
public:
  EventManager();
 
  void subscribe(EventListener *eventListener, EventType eventType);
 
  void unsubscribe(EventListener *eventListener, EventType eventType);
 
  bool isSubscribed(EventListener *eventListener, EventType eventType);
 
  void publish(EventType eventType, EventData eventData);
 
private:
  struct EventSubscriber {
    EventListener *eventListener; // Pointer to the class instance extending EventListener
    EventType eventType;          // EventType to listen for
    EventSubscriber *next;        // Pointer to the next subscriber in the list
 
    EventSubscriber(EventListener *eventListener, EventType eventType)
        : eventListener(eventListener), eventType(eventType), next(nullptr) {}
  };
 
  EventSubscriber *_firstEventSubscriber; // Pointer to the first subscriber in the list
};
 
#endif // EVENTMANAGER_H