983d85384b
* Remove icky hook for now * Force callers of getTimeAgo to pass in the 'now' value * Update usage in Newskie dialog
86 lines
2.4 KiB
TypeScript
86 lines
2.4 KiB
TypeScript
import {useCallback} from 'react'
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import {msg, plural} from '@lingui/macro'
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import {I18nContext, useLingui} from '@lingui/react'
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import {differenceInSeconds} from 'date-fns'
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export type TimeAgoOptions = {
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lingui: I18nContext['_']
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format?: 'long' | 'short'
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}
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export function useGetTimeAgo() {
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const {_} = useLingui()
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return useCallback(
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(
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earlier: number | string | Date,
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later: number | string | Date,
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options?: Omit<TimeAgoOptions, 'lingui'>,
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) => {
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return dateDiff(earlier, later, {lingui: _, format: options?.format})
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},
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[_],
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)
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}
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const NOW = 5
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const MINUTE = 60
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const HOUR = MINUTE * 60
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const DAY = HOUR * 24
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const MONTH_30 = DAY * 30
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/**
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* Returns the difference between `earlier` and `later` dates, formatted as a
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* natural language string.
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*
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* - All month are considered exactly 30 days.
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* - Dates assume `earlier` <= `later`, and will otherwise return 'now'.
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* - Differences >= 360 days are returned as the "M/D/YYYY" string
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* - All values round down
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*/
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export function dateDiff(
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earlier: number | string | Date,
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later: number | string | Date,
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options: TimeAgoOptions,
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): string {
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const _ = options.lingui
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const format = options?.format || 'short'
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const long = format === 'long'
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const diffSeconds = differenceInSeconds(new Date(later), new Date(earlier))
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if (diffSeconds < NOW) {
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return _(msg`now`)
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} else if (diffSeconds < MINUTE) {
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return `${diffSeconds}${
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long ? ` ${plural(diffSeconds, {one: 'second', other: 'seconds'})}` : 's'
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}`
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} else if (diffSeconds < HOUR) {
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const diff = Math.floor(diffSeconds / MINUTE)
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return `${diff}${
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long ? ` ${plural(diff, {one: 'minute', other: 'minutes'})}` : 'm'
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}`
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} else if (diffSeconds < DAY) {
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const diff = Math.floor(diffSeconds / HOUR)
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return `${diff}${
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long ? ` ${plural(diff, {one: 'hour', other: 'hours'})}` : 'h'
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}`
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} else if (diffSeconds < MONTH_30) {
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const diff = Math.floor(diffSeconds / DAY)
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return `${diff}${
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long ? ` ${plural(diff, {one: 'day', other: 'days'})}` : 'd'
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}`
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} else {
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const diff = Math.floor(diffSeconds / MONTH_30)
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if (diff < 12) {
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return `${diff}${
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long ? ` ${plural(diff, {one: 'month', other: 'months'})}` : 'mo'
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}`
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} else {
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const str = new Date(earlier).toLocaleDateString()
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if (long) {
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return _(msg`on ${str}`)
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}
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return str
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}
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}
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}
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