!7

compact module HeadphoneDetection > DynBigNumber {
  Bool pluggedIn; // null if unknown
  int minValue = 100, maxValue;
  
  start {
    setDescription("HEADPHONES");
    if (isLinux()) ret with setValue("Linux only, sorry");
    doEveryAndNow(10.0, r actualUpdate);
  }
  
  void actualUpdate {
    int raw = linux_rawHeadphonesCount();
    setField(minValue := min(minValue, raw));
    setField(maxValue := max(maxValue, raw));
    setField(pluggedIn := minValue == maxValue ? null : raw > minValue);
    setValue(nullFalseTrue(pluggedIn, "?", "NO", "YES"));
  }
}