@xstoudi/human-readable-time/src/index.js

Easily parse seconds to human readable time and hrt to seconds.

const SECONDS_IN = {
  year: 31536000,
  week: 604800,
  day: 86400,
  hour: 3600,
  minute: 60
}

function secondsToHRT(seconds) {

  let hrt = ''

  const years = Math.floor(seconds / SECONDS_IN.year)
  seconds -= SECONDS_IN.year * years
  if (years > 0)
    hrt = `${hrt}${years}y `

  const weeks = Math.floor(seconds / SECONDS_IN.week)
  seconds -= SECONDS_IN.week * weeks
  if (weeks > 0)
    hrt = `${hrt}${weeks}w `

  const days = Math.floor(seconds / SECONDS_IN.day)
  seconds -= SECONDS_IN.day * days
  if (days > 0)
    hrt = `${hrt}${days}d `

  const hours = Math.floor(seconds / SECONDS_IN.hour)
  seconds -= SECONDS_IN.hour * hours
  if (hours > 0)
    hrt = `${hrt}${hours}h `

  const minutes = Math.floor(seconds / SECONDS_IN.minute)
  seconds -= SECONDS_IN.minute * minutes
  if (minutes > 0)
    hrt = `${hrt}${minutes}m `

  if (seconds > 0)
    hrt = `${hrt}${seconds}s `

  return hrt.trim()
}

function hrtToSeconds(hrt) {
  let totalSeconds = 0

  hrt.split(' ').forEach(sHrt => {
    const yearIndex = sHrt.indexOf('y')
    if (yearIndex != -1) {
      totalSeconds += Number(sHrt.slice(0, yearIndex)) * SECONDS_IN.year
    }

    const weeksIndex = sHrt.indexOf('w')
    if (weeksIndex != -1)
      return totalSeconds += Number(sHrt.slice(0, weeksIndex)) * SECONDS_IN.week


    const daysIndex = sHrt.indexOf('d')
    if (daysIndex != -1)
      return totalSeconds += Number(sHrt.slice(0, daysIndex)) * SECONDS_IN.day


    const hoursIndex = sHrt.indexOf('h')
    if (hoursIndex != -1)
      return totalSeconds += Number(sHrt.slice(0, hoursIndex)) * SECONDS_IN.hour


    const minutesIndex = sHrt.indexOf('m')
    if (minutesIndex != -1)
      return totalSeconds += Number(sHrt.slice(0, minutesIndex)) * SECONDS_IN.minute


    const secondsIndex = sHrt.indexOf('s')
    if (secondsIndex != -1)
      return totalSeconds += Number(sHrt.slice(0, secondsIndex))

  })


  return totalSeconds
}

module.exports = { hrtToSeconds, secondsToHRT }