date_utils.js
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date_utils.js
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	export const SECOND = 1000
	export const MINUTE = 60 * SECOND
	export const HOUR = 60 * MINUTE
	export const DAY = 24 * HOUR
	export const WEEK = 7 * DAY
	export const MONTH = 30 * DAY
	export const YEAR = 365.25 * DAY

	export const relativeTime = (date, nowThreshold = 1) => {
	if (typeof date === 'string') date = Date.parse(date)
	const round = Date.now() > date ? Math.floor : Math.ceil
	const d = Math.abs(Date.now() - date)
	let r = { num: round(d / YEAR), key: 'time.years' }
	if (d < nowThreshold * SECOND) {
	r.num = 0
	r.key = 'time.now'
	} else if (d < MINUTE) {
	r.num = round(d / SECOND)
	r.key = 'time.seconds'
	} else if (d < HOUR) {
	r.num = round(d / MINUTE)
	r.key = 'time.minutes'
	} else if (d < DAY) {
	r.num = round(d / HOUR)
	r.key = 'time.hours'
	} else if (d < WEEK) {
	r.num = round(d / DAY)
	r.key = 'time.days'
	} else if (d < MONTH) {
	r.num = round(d / WEEK)
	r.key = 'time.weeks'
	} else if (d < YEAR) {
	r.num = round(d / MONTH)
	r.key = 'time.months'
	}
	// Remove plural form when singular
	if (r.num === 1) r.key = r.key.slice(0, -1)
	return r
	}

	export const relativeTimeShort = (date, nowThreshold = 1) => {
	const r = relativeTime(date, nowThreshold)
	r.key += '_short'
	return r
	}