/**
 * A small util that is used to increment or decrement a number until
 * it reaches the max value or -1. When that happens, it will loop around
 * to 0 or the max value respectively. This does not work for different
 * increment numbers or any values below 0 for now.
 *
 * @param x The number to increment or decrement
 * @param max The max number that can be set
 * @param increment Boolean if it should be incremented or decremented
 */
export default function loop(x: number, max: number, increment: boolean) {
  let next = x + (increment ? 1 : -1);
  if (next > max) {
    next = 0;
  } else if (next < 0) {
    next = max;
  }

  return next;
}