function pad(value) {
  return value < 10 ? `0${value}` : `${value}`;
}

function formatDate(date) {
  const year = date.getFullYear();
  const month = pad(date.getMonth() + 1);
  const day = pad(date.getDate());
  return `${year}-${month}-${day}`;
}

function formatTime(date) {
  const hours = pad(date.getHours());
  const minutes = pad(date.getMinutes());
  return `${hours}:${minutes}`;
}

module.exports = {
  formatDate,
  formatTime
};