Strider-CD/strider

/*
 * Javascript Humane Dates
 * Copyright (c) 2008 Dean Landolt (deanlandolt.com)
 * Re-write by Zach Leatherman (zachleat.com)
 *
 * Adopted from the John Resig's pretty.js
 * at http://ejohn.org/blog/javascript-pretty-date
 * and henrah's proposed modification
 * at http://ejohn.org/blog/javascript-pretty-date/#comment-297458
 *
 * Licensed under the MIT license.
 */
exports.humaneDate = function humaneDate(date, compareTo) {
    if (!date) {
        return;
    }
    const lang = {
        ago: 'Ago',
        from: '',
        now: 'Just Now',
        minute: 'Minute',
        minutes: 'Minutes',
        hour: 'Hour',
        hours: 'Hours',
        day: 'Day',
        days: 'Days',
        week: 'Week',
        weeks: 'Weeks',
        month: 'Month',
        months: 'Months',
        year: 'Year',
        years: 'Years',
    };
    const formats = [
        [60, lang.now],
        [3600, lang.minute, lang.minutes, 60],
        [86400, lang.hour, lang.hours, 3600],
        [604800, lang.day, lang.days, 86400],
        [2628000, lang.week, lang.weeks, 604800],
        [31536000, lang.month, lang.months, 2628000],
        [Infinity, lang.year, lang.years, 31536000],
    ];
    const isString = typeof date == 'string';
    date = isString
        ? new Date(date.replace(/-/g, '/').replace(/[TZ]/g, ' '))
        : date;
    compareTo = compareTo || new Date();
    let seconds = (compareTo -
        date +
        (compareTo.getTimezoneOffset() -
            // if we received a GMT time from a string, doesn't include time zone bias
            // if we got a date object, the time zone is built in, we need to remove it.
            (isString ? 0 : date.getTimezoneOffset())) *
            60000) /
        1000;
    let token;
    if (seconds < 0) {
        seconds = Math.abs(seconds);
        token = lang.from ? ` ${lang.from}` : '';
    }
    else {
        token = lang.ago ? ` ${lang.ago}` : '';
    }
    /*
     * 0 seconds && < 60 seconds        Now
     * 60 seconds                       1 Minute
     * > 60 seconds && < 60 minutes     X Minutes
     * 60 minutes                       1 Hour
     * > 60 minutes && < 24 hours       X Hours
     * 24 hours                         1 Day
     * > 24 hours && < 7 days           X Days
     * 7 days                           1 Week
     * > 7 days && < ~ 1 Month          X Weeks
     * ~ 1 Month                        1 Month
     * > ~ 1 Month && < 1 Year          X Months
     * 1 Year                           1 Year
     * > 1 Year                         X Years
     *
     * Single units are +10%. 1 Year shows first at 1 Year + 10%
     */
    function normalize(val, single) {
        const margin = 0.1;
        if (val >= single && val <= single * (1 + margin)) {
            return single;
        }
        return val;
    }
    for (let i = 0, format = formats[0]; formats[i]; format = formats[++i]) {
        if (seconds < format[0]) {
            if (i === 0) {
                // Now
                return format[1];
            }
            const val = Math.ceil(normalize(seconds, format[3]) / format[3]);
            return `${val} ${val != 1 ? format[2] : format[1]}${i > 0 ? token : ''}`;
        }
    }
};
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