playIntroMenu function

void playIntroMenu(Channel channel)

Implementation

void playIntroMenu(Channel channel) {
  IvrState state = IvrState();

  state.currentSound = menu.sounds[0];
  state.currentPlayback = client.playback();
  state.done = false;

  // plays are-you-still-there and restarts the menu
  void stillThere() {
    print('Channel ${channel.name} stopped paying attention...');
    var playback = client.playback();
    channel.play(playback, (err, playback) {
      if (err) {
        throw err;
      }

      playIntroMenu(channel);
    }, media: ['sound:are-you-still-there']);
  }

  // Start up the next sound and handle whatever happens
  void queueUpSound() {
    if (!state.done) {
      // have we played all sounds in the menu?
      if (state.currentSound != null) {
        var timer = setTimeout(stillThere, 10 * 1000);

        timers[channel.id] = timer;
      } else {
        var playback = client.playback();
        state.currentPlayback = playback;

        channel.play(playback, (err, playback) {
          // ignore errors
        }, media: [state.currentSound!]);
        playback.on('PlaybackFinished', (event, playback) {
          queueUpSound();
        });

        var nextSoundIndex = menu.sounds.indexOf(state.currentSound!) + 1;
        state.currentSound = menu.sounds[nextSoundIndex];
      }
    }
  }

  void cancelMenu() {
    state.done = true;
    if (state.currentPlayback != null) {
      state.currentPlayback!.stop((err) {
        // ignore errors
      });
    }

    // remove listeners as future calls to playIntroMenu will create new ones
    channel.removeListener('ChannelDtmfReceived', (event, channel) {
      //cancelMenu();
    });
    channel.removeListener('StasisEnd', (event, channel) {
      //cancelMenu();
    });
  }

  channel.on('ChannelDtmfReceived', (event, channel) {
    cancelMenu();
  });
  channel.on('StasisEnd', (event, channel) {
    cancelMenu();
  });
  queueUpSound();

  // Cancel the menu, as the user did something

  // Cancel the timeout for the channel
  void cancelTimeout(Channel channel) {
    var timer = timers[channel.id];

    if (timer != null) {
      clearTimeout(timer);
      timers.remove(channel.id);
    }
  }
}