text: import KeepAwake from 'react-native-keep-awake';
  
  import { getCurrentConference } from '../../base/conference';
  import { StateListenerRegistry } from '../../base/redux';
  
  /**
   * State listener that activates or deactivates the wake lock accordingly. If
   * the wake lock is active, it will prevent the screen from dimming.
   */
  StateListenerRegistry.register(
      /* selector */ state => {
          const { enabled: audioOnly } = state['features/base/audio-only'];
          const conference = getCurrentConference(state);
  
          return Boolean(conference && !audioOnly);
      },
      /* listener */ wakeLock => _setWakeLock(wakeLock)
  );
  
  /**
   * Activates/deactivates the wake lock. If the wake lock is active, it will
   * prevent the screen from dimming.
   *
   * @param {boolean} wakeLock - True to active the wake lock or false to
   * deactivate it.
   * @private
   * @returns {void}
   */
  function _setWakeLock(wakeLock) {
      if (wakeLock) {
          KeepAwake.activate();
      } else {
          KeepAwake.deactivate();
      }
  }
  