export function compressToRanges(numbers: number[]): string {
  if (numbers.length === 0) return '';

  const ranges: string[] = [];
  let start = numbers[0];
  let end = numbers[0];

  for (let i = 1; i <= numbers.length; i++) {
    if (numbers[i] === end + 1) {
      end = numbers[i];
    } else {
      if (start === end) {
        ranges.push(`${start}`);
      } else {
        ranges.push(`${start}-${end}`);
      }

      start = numbers[i];
      end = numbers[i];
    }
  }

  return ranges.join(',');
}