Function parseProgression

src/cli.ts:89–111

(
  root: string,
  mode: string,
  progressionInput: string
)

};

const parseProgression = (
  root: string,
  mode: string,
  progressionInput: string
): string => {
  if (progressionInput === 'random') {
    const modeType = mode === 'minor' || mode === 'm' ? 'minor' : 'major';
    const randomProg = progression(modeType, 4).join(' ');
    return getChordsByProgression(`${root} ${mode}`, randomProg);
  }

  if (/^[1-7]+$/.test(progressionInput)) {
    const converted = romanByDigit(progressionInput, mode);
    return getChordsByProgression(`${root} ${mode}`, converted.chordDegrees);
  }

  if (/^[ivIV°+7\s,]+$/.test(progressionInput)) {
    const normalized = progressionInput.replace(/\s*,+\s*/g, ' ');
    return getChordsByProgression(`${root} ${mode}`, normalized);
  }

  return progressionInput.replace(/-/g, ' ');
};

const normalizeArpOrder = (order: string): string => {
  if (!/^\d+$/.test(order)) {