ChannelController.h

#pragma once
 
#include "../SinricProRequest.h"
#include "../EventLimiter.h"
#include "../SinricProStrings.h"
 
#include "../SinricProNamespace.h"
namespace SINRICPRO_NAMESPACE {
 
FSTR(CHANNEL, changeChannel);     // "changeChannel"
FSTR(CHANNEL, channel);           // "channel"
FSTR(CHANNEL, name);              // "name"
FSTR(CHANNEL, number);            // "number"
FSTR(CHANNEL, skipChannels);      // "skipChannels"
FSTR(CHANNEL, channelCount);      // "channelCount"
 
using ChangeChannelCallback = std::function<bool(const String &, String &)>;
 
using ChangeChannelNumberCallback = std::function<bool(const String &, int, String &)>;
 
using SkipChannelsCallback = std::function<bool(const String &, int, String &)>;
 
template <typename T>
class ChannelController {
  public:
    ChannelController();
 
    void onChangeChannel(ChangeChannelCallback cb);
    void onChangeChannelNumber(ChangeChannelNumberCallback cb);
    void onSkipChannels(SkipChannelsCallback cb);
 
    bool sendChangeChannelEvent(String channelName, String cause = FSTR_SINRICPRO_PHYSICAL_INTERACTION);
  protected:
    bool handleChannelController(SinricProRequest &request);
 
  private:
    EventLimiter event_limiter;
    ChangeChannelCallback changeChannelCallback;
    ChangeChannelNumberCallback changeChannelNumberCallback;
    SkipChannelsCallback skipChannelsCallback;
};
 
template <typename T>
ChannelController<T>::ChannelController()
: event_limiter(EVENT_LIMIT_STATE) {
  T* device = static_cast<T*>(this);
  device->registerRequestHandler(std::bind(&ChannelController<T>::handleChannelController, this, std::placeholders::_1)); 
}
 
template <typename T>
void ChannelController<T>::onChangeChannel(ChangeChannelCallback cb) {
  changeChannelCallback = cb;
}
 
template <typename T>
void ChannelController<T>::onChangeChannelNumber(ChangeChannelNumberCallback cb) {
  changeChannelNumberCallback = cb;
}
 
template <typename T>
void ChannelController<T>::onSkipChannels(SkipChannelsCallback cb) {
  skipChannelsCallback = cb;
}
 
template <typename T>
bool ChannelController<T>::sendChangeChannelEvent(String channelName, String cause) {
  if (event_limiter) return false;
  T* device = static_cast<T*>(this);
 
  JsonDocument eventMessage = device->prepareEvent(FSTR_CHANNEL_changeChannel, cause.c_str());
  JsonObject event_value = eventMessage[FSTR_SINRICPRO_payload][FSTR_SINRICPRO_value];
  event_value[FSTR_CHANNEL_channel][FSTR_CHANNEL_name] = channelName;
  return device->sendEvent(eventMessage);
}
 
template <typename T>
bool ChannelController<T>::handleChannelController(SinricProRequest &request) {
  T* device = static_cast<T*>(this);
 
  bool success = false;
 
  if (request.action == FSTR_CHANNEL_changeChannel) {
 
    if (changeChannelCallback && request.request_value[FSTR_CHANNEL_channel].containsKey(FSTR_CHANNEL_name)) {
      String channelName = request.request_value[FSTR_CHANNEL_channel][FSTR_CHANNEL_name] | "";
      success = changeChannelCallback(device->deviceId, channelName);
      request.response_value[FSTR_CHANNEL_channel][FSTR_CHANNEL_name] = channelName;
    }
 
    if (changeChannelNumberCallback && request.request_value[FSTR_CHANNEL_channel].containsKey(FSTR_CHANNEL_number)) {
      String channelName("");
      int channelNumber = request.request_value[FSTR_CHANNEL_channel][FSTR_CHANNEL_number];
      success = changeChannelNumberCallback(device->deviceId, channelNumber, channelName);
      request.response_value[FSTR_CHANNEL_channel][FSTR_CHANNEL_name] = channelName;
    }
    return success;
  }
 
  if (skipChannelsCallback && request.action == FSTR_CHANNEL_skipChannels) {
    String channelName;
    int channelCount                                                = request.request_value[FSTR_CHANNEL_channelCount] | 0;
    success                                                         = skipChannelsCallback(device->deviceId, channelCount, channelName);
    request.response_value[FSTR_CHANNEL_channel][FSTR_CHANNEL_name] = channelName;
    return success;
  }
 
  return success;
}
 
} // SINRICPRO_NAMESPACE
 
template <typename T>
using ChannelController = SINRICPRO_NAMESPACE::ChannelController<T>;