Automate generation of trumpet fingerings

[chrisglein]

The fingerings for trumpet could be programmatically generated. I've done it by hand so far. And to speed up I threw together a quick programmatic conversion:
https://codepen.io/papasnewbag/pen/mdaVReV

It's dumb in one key way, in that it doesn't actually use the key so it doesn't get sharps and flats.

Key function (that would almost certainly be better baked into ABCJS, but this was quickest for me)

let convert = (input) => {
  let regex = new RegExp(/([a-gA-G][,']*\d*)/g);

  let mappings = {
    "A,": "2",
    'C': '13',
    'D': '12',
    'E': '2',
    'F': '0',
    'G': '12',
    'A': '2',
    'B': '123',
    'c': '13',
    'd': '12',
    'e': '2',
    'f': '0',
    'g': '12',
    'a': '2',
    'b': '123',
    'c,': '13',
    'd,': '12',
    'e,': '2',
    'f,': '0',
    'g,': '12',
    'a,': '2',
    'b,': '123',
  }

  let replacer = (match) => {
    // remove the digits from the end
    let note = match.replace(/[0-9]+$/, '');
    return ' ' + (mappings[note] ?? note);
  };
  
  let result = input;
  
  // no chords
  result = result.replaceAll(/(\"[\w\/\d]+\")/g, '');
  
  // no rests
  result = result.replaceAll(/(z\d*)/g, '');
  
  // no whitespace and no bars
  result = result.replaceAll(/(\s|\|)/g, '');
  
  // convert the notes to fingerings
  result = result.replaceAll(regex, replacer);

  return 'w:' + result;
}