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!7

module SpeechRecognitionControl {
  S method = 'google;
  
  transient JPanel stack;
  transient new RestartableCountdown deleteIfUnused;
  transient Set<AutoCloseable> activeRequests;
  transient ReliableSingleThread rstStartStop;
  
  start {
    rstStartStop = dm_rst(this, r startStop);
    activeRequests = setWithNotify(rstStartStop);
    startCountdown();
    if (dm_getBounds() == null) {
      int w = getWidth(dm_desktopPane()), h = getHeight(dm_desktopPane());
      dm_setBounds(this, w-300, h-200, 300, h);
    }
  }
  
  visualize {
    ret withRightMargin(stack = dynamicVStack2());
  }
  
  // start countdown to delete module if unused
  void startCountdown {
    deleteIfUnused.start(60.0, rEnter dm_deleteModule);
  }
  
  void startStop {
    if (nempty(activeRequests))
      dm_requireAndCallModule("#1018551/SpeechRecognizer", 'startListening);
    else
      dm_findAndCallModule("#1018551/SpeechRecognizer", 'stopListening);
   }
  
  // API
  
  // Note: cancelMe will be called in GUI thread
  AutoCloseable activateSpeechRecognition(S reason) {
    deleteIfUnused.stop();
    final JLabel lbl = jlabel(reason);
    final AutoCloseable release = autoCloseable {
      removeAndValidate(c);
      activeRequests.remove(this);
      startCountdown();
    };
    final JComponent c = centerAndEast(lbl, jbutton("Cancel", r { close(release) }));
    addAndValidate(stack, c);
    ret addAndReturn(activeRequests, release);
  }
}