web-annotation-discovery-webextension/src/util

function hourString(date: Date) {
  // return date.toLocaleTimeString([], {hour: 'numeric', minute: '2-digit'})
  return `${('0' + date.getHours()).slice(-2)}:${('0' + date.getMinutes()).slice(-2)}`
}

function dayString(date: Date) {
  const days = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
  return days[date.getDay()]
}

function monthString(date: Date) {
  const months = ['Jan', 'Feb', 'March', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec']
  return months[date.getMonth()]
}

// Get something nicely readable - at least to my personal taste.
export default function niceTime(date: Date, { now = undefined }: { now?: Date } = {}) {
  const then = new Date(date)
  now = now || new Date()
  const secondsAgo = (+now - +then) / 1000
  if (secondsAgo < -60 * 60 * 24) {
      return 'in the future?!'
  }
  if (secondsAgo < -60) {
      return 'soon?!'
  }
  if (secondsAgo < 2) { return 'now' }
  if (secondsAgo < 60) { return `seconds ago` }
  // if (secondsAgo < 60) { return `${Math.round(secondsAgo)} seconds ago` }
  if (secondsAgo < 120) { return 'a minute ago' }
  if (secondsAgo < 60 * 10) { return `${Math.round(secondsAgo / 60)} minutes ago` }
  if (secondsAgo < 60 * 60) { return `${Math.round(secondsAgo / 60 / 5) * 5} minutes ago` }
  if (secondsAgo < 60 * 60 * 24
      && (now.getDay() === then.getDay() || secondsAgo < 60 * 60 * 6)) { return hourString(then) }
  if (secondsAgo < 60 * 60 * 24) { return `Yesterday ${hourString(then)}` }
  if (secondsAgo < 60 * 60 * 24 * 3) { return `${dayString(then)} ${hourString(then)}` }
  if (then.getFullYear() === now.getFullYear()) { return `${then.getDate()} ${monthString(then)}` }
  return `${then.getDate()} ${monthString(then)} ${then.getFullYear()}`
}

export function niceDate(date: Date, { now = new Date() } = {}) {
  const then = new Date(date)
  if (then.getFullYear() !== now.getFullYear()) {
      return `${then.getDate()} ${monthString(then)} ${then.getFullYear()}`
  }
  if (then.getMonth() === now.getMonth()) {
      const daysAgo = now.getDate() - then.getDate()
      if (daysAgo === 0) return `Today`
      if (daysAgo === 1) return `Yesterday`
  }
  return `${dayString(then)} ${then.getDate()} ${monthString(then)}`
}