export function getRelativeTime()

in src/util/date.ts [1:25]

• 18 lines of code
• 7 McCabe index (conditional complexity)

export function getRelativeTime(now: Date, time: Date): string {
  let diff = now.valueOf() - time.valueOf();

  function relativeTime(count: number, unit: string) {
    let units = count > 1 ? unit + 's' : unit;
    return count + ' ' + units + ' ago';
  }

  let headerText = '';
  // Approximate---not exact!
  let seconds = Math.floor(diff / 1000);
  let minutes = Math.floor(seconds / 60);
  let hours = Math.floor(minutes / 60);
  let days = Math.floor(hours / 24);
  let weeks = Math.floor(days / 7);
  let months = Math.floor(weeks / 4); // approximate. Need calendar to be exact
  if (months > 0) headerText = relativeTime(months, 'month');
  else if (weeks > 0) headerText = relativeTime(weeks, 'week');
  else if (days > 0) headerText = relativeTime(days, 'day');
  else if (hours > 0) headerText = relativeTime(hours, 'hour');
  else if (minutes > 0) headerText = relativeTime(minutes, 'minute');
  else if (seconds > 0) headerText = relativeTime(seconds, 'second');
  else headerText = 'Milliseconds ago';
  return headerText;
}