RocketChat/Rocket.Chat

import { Meteor } from 'meteor/meteor';
import { Tracker } from 'meteor/tracker';
import type { Moment, MomentInput } from 'moment';
import moment from 'moment';

import { settings } from '../../../app/settings/client';
import { getUserPreference } from '../../../app/utils/client';
import { t } from '../../../app/utils/lib/i18n';

const dayFormat = ['h:mm A', 'H:mm'];

export const timeAgo = async (date: MomentInput): Promise<string> => {
    const clockMode = Tracker.nonreactive(() => getUserPreference(Meteor.userId(), 'clockMode', false) as number | boolean);
    const messageTimeFormat = Tracker.nonreactive(() => settings.get('Message_TimeFormat'));
    const sameDay = (typeof clockMode === 'number' ? dayFormat[clockMode - 1] : undefined) || messageTimeFormat;

    return moment(date).calendar(null, {
        lastDay: `[${t('yesterday')}]`,
        sameDay,
        lastWeek: 'dddd',
        sameElse(this: Moment, now) {
            const diff = Math.ceil(this.diff(now, 'years', true));
            return diff < 0 ? 'MMM D YYYY' : 'MMM D';
        },
    });
};