chinwagsocial/app/javascript/mastodon/components/relative_timestamp.tsx

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import { Component } from 'react';
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import type { IntlShape } from 'react-intl';
import { injectIntl, defineMessages } from 'react-intl';
const messages = defineMessages({
today: { id: 'relative_time.today', defaultMessage: 'today' },
just_now: { id: 'relative_time.just_now', defaultMessage: 'now' },
just_now_full: {
id: 'relative_time.full.just_now',
defaultMessage: 'just now',
},
seconds: { id: 'relative_time.seconds', defaultMessage: '{number}s' },
seconds_full: {
id: 'relative_time.full.seconds',
defaultMessage: '{number, plural, one {# second} other {# seconds}} ago',
},
minutes: { id: 'relative_time.minutes', defaultMessage: '{number}m' },
minutes_full: {
id: 'relative_time.full.minutes',
defaultMessage: '{number, plural, one {# minute} other {# minutes}} ago',
},
hours: { id: 'relative_time.hours', defaultMessage: '{number}h' },
hours_full: {
id: 'relative_time.full.hours',
defaultMessage: '{number, plural, one {# hour} other {# hours}} ago',
},
days: { id: 'relative_time.days', defaultMessage: '{number}d' },
days_full: {
id: 'relative_time.full.days',
defaultMessage: '{number, plural, one {# day} other {# days}} ago',
},
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',
},
});
const dateFormatOptions = {
hour12: false,
year: 'numeric',
month: 'short',
day: '2-digit',
hour: '2-digit',
minute: '2-digit',
} as const;
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const shortDateFormatOptions = {
month: 'short',
day: 'numeric',
} as const;
const SECOND = 1000;
const MINUTE = 1000 * 60;
const HOUR = 1000 * 60 * 60;
const DAY = 1000 * 60 * 60 * 24;
const MAX_DELAY = 2147483647;
const selectUnits = (delta: number) => {
const absDelta = Math.abs(delta);
if (absDelta < MINUTE) {
return 'second';
} else if (absDelta < HOUR) {
return 'minute';
} else if (absDelta < DAY) {
return 'hour';
}
return 'day';
};
const getUnitDelay = (units: string) => {
switch (units) {
case 'second':
return SECOND;
case 'minute':
return MINUTE;
case 'hour':
return HOUR;
case 'day':
return DAY;
default:
return MAX_DELAY;
}
};
export const timeAgoString = (
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intl: IntlShape,
date: Date,
now: number,
year: number,
timeGiven: boolean,
short?: boolean
) => {
const delta = now - date.getTime();
let relativeTime;
if (delta < DAY && !timeGiven) {
relativeTime = intl.formatMessage(messages.today);
} else if (delta < 10 * SECOND) {
relativeTime = intl.formatMessage(
short ? messages.just_now : messages.just_now_full
);
} else if (delta < 7 * DAY) {
if (delta < MINUTE) {
relativeTime = intl.formatMessage(
short ? messages.seconds : messages.seconds_full,
{ number: Math.floor(delta / SECOND) }
);
} else if (delta < HOUR) {
relativeTime = intl.formatMessage(
short ? messages.minutes : messages.minutes_full,
{ number: Math.floor(delta / MINUTE) }
);
} else if (delta < DAY) {
relativeTime = intl.formatMessage(
short ? messages.hours : messages.hours_full,
{ number: Math.floor(delta / HOUR) }
);
} else {
relativeTime = intl.formatMessage(
short ? messages.days : messages.days_full,
{ number: Math.floor(delta / DAY) }
);
}
} else if (date.getFullYear() === year) {
relativeTime = intl.formatDate(date, shortDateFormatOptions);
} else {
relativeTime = intl.formatDate(date, {
...shortDateFormatOptions,
year: 'numeric',
});
}
return relativeTime;
};
const timeRemainingString = (
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intl: IntlShape,
date: Date,
now: number,
timeGiven = true
) => {
const delta = date.getTime() - now;
let relativeTime;
if (delta < DAY && !timeGiven) {
relativeTime = intl.formatMessage(messages.today);
} else if (delta < 10 * SECOND) {
relativeTime = intl.formatMessage(messages.moments_remaining);
} else if (delta < MINUTE) {
relativeTime = intl.formatMessage(messages.seconds_remaining, {
number: Math.floor(delta / SECOND),
});
} else if (delta < HOUR) {
relativeTime = intl.formatMessage(messages.minutes_remaining, {
number: Math.floor(delta / MINUTE),
});
} else if (delta < DAY) {
relativeTime = intl.formatMessage(messages.hours_remaining, {
number: Math.floor(delta / HOUR),
});
} else {
relativeTime = intl.formatMessage(messages.days_remaining, {
number: Math.floor(delta / DAY),
});
}
return relativeTime;
};
interface Props {
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intl: IntlShape;
timestamp: string;
year: number;
futureDate?: boolean;
short?: boolean;
}
interface States {
now: number;
}
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class RelativeTimestamp extends Component<Props, States> {
state = {
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now: Date.now(),
};
static defaultProps = {
year: new Date().getFullYear(),
short: true,
};
_timer: number | undefined;
shouldComponentUpdate(nextProps: Props, nextState: States) {
// 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 ||
this.state.now !== nextState.now
);
}
UNSAFE_componentWillReceiveProps(nextProps: Props) {
if (this.props.timestamp !== nextProps.timestamp) {
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this.setState({ now: Date.now() });
}
}
componentDidMount() {
this._scheduleNextUpdate(this.props, this.state);
}
UNSAFE_componentWillUpdate(nextProps: Props, nextState: States) {
this._scheduleNextUpdate(nextProps, nextState);
}
componentWillUnmount() {
window.clearTimeout(this._timer);
}
_scheduleNextUpdate(props: Props, state: States) {
window.clearTimeout(this._timer);
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 = window.setTimeout(() => {
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this.setState({ now: Date.now() });
}, delay);
}
render() {
const { timestamp, intl, year, futureDate, short } = this.props;
const timeGiven = timestamp.includes('T');
const date = new Date(timestamp);
const relativeTime = futureDate
? timeRemainingString(intl, date, this.state.now, timeGiven)
: timeAgoString(intl, date, this.state.now, year, timeGiven, short);
return (
<time
dateTime={timestamp}
title={intl.formatDate(date, dateFormatOptions)}
>
{relativeTime}
</time>
);
}
}
const RelativeTimestampWithIntl = injectIntl(RelativeTimestamp);
export { RelativeTimestampWithIntl as RelativeTimestamp };