gab-social/app/javascript/gabsocial/components/relative_timestamp.js

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import { injectIntl, defineMessages } from 'react-intl'
const messages = defineMessages({
just_now: { id: 'relative_time.just_now', defaultMessage: 'now' },
seconds: { id: 'relative_time.seconds', defaultMessage: '{number}s' },
minutes: { id: 'relative_time.minutes', defaultMessage: '{number}m' },
hours: { id: 'relative_time.hours', defaultMessage: '{number}h' },
days: { id: 'relative_time.days', defaultMessage: '{number}d' },
moments_remaining: { id: 'time_remaining.moments', defaultMessage: 'Moments remaining' },
seconds_remaining: { id: 'time_remaining.seconds', defaultMessage: '{number, plural, one {# second} other {# seconds}} left' },
minutes_remaining: { id: 'time_remaining.minutes', defaultMessage: '{number, plural, one {# minute} other {# minutes}} left' },
hours_remaining: { id: 'time_remaining.hours', defaultMessage: '{number, plural, one {# hour} other {# hours}} left' },
days_remaining: { id: 'time_remaining.days', defaultMessage: '{number, plural, one {# day} other {# days}} left' },
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})
const dateFormatOptions = {
hour12: false,
year: 'numeric',
month: 'short',
day: '2-digit',
hour: '2-digit',
minute: '2-digit',
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}
const shortDateFormatOptions = {
month: 'short',
day: 'numeric',
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}
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const SECOND = 1000
const MINUTE = 1000 * 60
const HOUR = 1000 * 60 * 60
const DAY = 1000 * 60 * 60 * 24
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const MAX_DELAY = 2147483647
const selectUnits = delta => {
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const absDelta = Math.abs(delta)
if (absDelta < MINUTE) {
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return 'second'
} else if (absDelta < HOUR) {
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return 'minute'
} else if (absDelta < DAY) {
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return 'hour'
}
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return 'day'
}
const getUnitDelay = units => {
switch (units) {
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case 'second':
return SECOND
case 'minute':
return MINUTE
case 'hour':
return HOUR
case 'day':
return DAY
default:
return MAX_DELAY
}
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}
export const timeAgoString = (intl, date, now, year) => {
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const delta = now - date.getTime()
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let relativeTime
if (delta < 10 * SECOND) {
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relativeTime = intl.formatMessage(messages.just_now)
} else if (delta < 7 * DAY) {
if (delta < MINUTE) {
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relativeTime = intl.formatMessage(messages.seconds, { number: Math.floor(delta / SECOND) })
} else if (delta < HOUR) {
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relativeTime = intl.formatMessage(messages.minutes, { number: Math.floor(delta / MINUTE) })
} else if (delta < DAY) {
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relativeTime = intl.formatMessage(messages.hours, { number: Math.floor(delta / HOUR) })
} else {
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relativeTime = intl.formatMessage(messages.days, { number: Math.floor(delta / DAY) })
}
} else if (date.getFullYear() === year) {
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relativeTime = intl.formatDate(date, shortDateFormatOptions)
} else {
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relativeTime = intl.formatDate(date, { ...shortDateFormatOptions, year: 'numeric' })
}
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return relativeTime
}
const timeRemainingString = (intl, date, now) => {
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const delta = date.getTime() - now
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let relativeTime
if (delta < 10 * SECOND) {
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relativeTime = intl.formatMessage(messages.moments_remaining)
} else if (delta < MINUTE) {
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relativeTime = intl.formatMessage(messages.seconds_remaining, { number: Math.floor(delta / SECOND) })
} else if (delta < HOUR) {
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relativeTime = intl.formatMessage(messages.minutes_remaining, { number: Math.floor(delta / MINUTE) })
} else if (delta < DAY) {
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relativeTime = intl.formatMessage(messages.hours_remaining, { number: Math.floor(delta / HOUR) })
} else {
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relativeTime = intl.formatMessage(messages.days_remaining, { number: Math.floor(delta / DAY) })
}
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return relativeTime
}
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export default
@injectIntl
class RelativeTimestamp extends Component {
static propTypes = {
intl: PropTypes.object.isRequired,
timestamp: PropTypes.string.isRequired,
year: PropTypes.number.isRequired,
futureDate: PropTypes.bool,
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}
state = {
now: this.props.intl.now(),
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}
static defaultProps = {
year: (new Date()).getFullYear(),
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}
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shouldComponentUpdate(nextProps, nextState) {
// As of right now the locale doesn't change without a new page load,
// but we might as well check in case that ever changes.
return this.props.timestamp !== nextProps.timestamp ||
this.props.intl.locale !== nextProps.intl.locale ||
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this.state.now !== nextState.now
}
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componentWillReceiveProps(nextProps) {
if (this.props.timestamp !== nextProps.timestamp) {
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this.setState({ now: this.props.intl.now() })
}
}
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componentDidMount() {
this._scheduleNextUpdate(this.props, this.state)
}
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componentWillUpdate(nextProps, nextState) {
this._scheduleNextUpdate(nextProps, nextState)
}
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componentWillUnmount() {
clearTimeout(this._timer)
}
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_scheduleNextUpdate(props, state) {
clearTimeout(this._timer)
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const { timestamp } = props
const delta = (new Date(timestamp)).getTime() - state.now
const unitDelay = getUnitDelay(selectUnits(delta))
const unitRemainder = Math.abs(delta % unitDelay)
const updateInterval = 1000 * 10
const delay = delta < 0 ? Math.max(updateInterval, unitDelay - unitRemainder) : Math.max(updateInterval, unitRemainder)
this._timer = setTimeout(() => {
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this.setState({ now: this.props.intl.now() })
}, delay)
}
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render() {
const { timestamp, intl, year, futureDate } = this.props
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const date = new Date(timestamp)
const relativeTime = futureDate ? timeRemainingString(intl, date, this.state.now) : timeAgoString(intl, date, this.state.now, year)
return (
<time dateTime={timestamp} title={intl.formatDate(date, dateFormatOptions)}>
{relativeTime}
</time>
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)
}
}