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Edit File: humanize.js

import { createDuration } from './create';

var round = Math.round,
    thresholds = {
        ss: 44, // a few seconds to seconds
        s: 45, // seconds to minute
        m: 45, // minutes to hour
        h: 22, // hours to day
        d: 26, // days to month/week
        w: null, // weeks to month
        M: 11, // months to year
    };

// helper function for moment.fn.from, moment.fn.fromNow, and moment.duration.fn.humanize
function substituteTimeAgo(string, number, withoutSuffix, isFuture, locale) {
    return locale.relativeTime(number || 1, !!withoutSuffix, string, isFuture);
}

function relativeTime(posNegDuration, withoutSuffix, thresholds, locale) {
    var duration = createDuration(posNegDuration).abs(),
        seconds = round(duration.as('s')),
        minutes = round(duration.as('m')),
        hours = round(duration.as('h')),
        days = round(duration.as('d')),
        months = round(duration.as('M')),
        weeks = round(duration.as('w')),
        years = round(duration.as('y')),
        a =
            (seconds <= thresholds.ss && ['s', seconds]) ||
            (seconds < thresholds.s && ['ss', seconds]) ||
            (minutes <= 1 && ['m']) ||
            (minutes < thresholds.m && ['mm', minutes]) ||
            (hours <= 1 && ['h']) ||
            (hours < thresholds.h && ['hh', hours]) ||
            (days <= 1 && ['d']) ||
            (days < thresholds.d && ['dd', days]);

if (thresholds.w != null) {
        a =
            a ||
            (weeks <= 1 && ['w']) ||
            (weeks < thresholds.w && ['ww', weeks]);
    }
    a = a ||
        (months <= 1 && ['M']) ||
        (months < thresholds.M && ['MM', months]) ||
        (years <= 1 && ['y']) || ['yy', years];

a[2] = withoutSuffix;
    a[3] = +posNegDuration > 0;
    a[4] = locale;
    return substituteTimeAgo.apply(null, a);
}

// This function allows you to set the rounding function for relative time strings
export function getSetRelativeTimeRounding(roundingFunction) {
    if (roundingFunction === undefined) {
        return round;
    }
    if (typeof roundingFunction === 'function') {
        round = roundingFunction;
        return true;
    }
    return false;
}

// This function allows you to set a threshold for relative time strings
export function getSetRelativeTimeThreshold(threshold, limit) {
    if (thresholds[threshold] === undefined) {
        return false;
    }
    if (limit === undefined) {
        return thresholds[threshold];
    }
    thresholds[threshold] = limit;
    if (threshold === 's') {
        thresholds.ss = limit - 1;
    }
    return true;
}

export function humanize(argWithSuffix, argThresholds) {
    if (!this.isValid()) {
        return this.localeData().invalidDate();
    }

var withSuffix = false,
        th = thresholds,
        locale,
        output;

if (typeof argWithSuffix === 'object') {
        argThresholds = argWithSuffix;
        argWithSuffix = false;
    }
    if (typeof argWithSuffix === 'boolean') {
        withSuffix = argWithSuffix;
    }
    if (typeof argThresholds === 'object') {
        th = Object.assign({}, thresholds, argThresholds);
        if (argThresholds.s != null && argThresholds.ss == null) {
            th.ss = argThresholds.s - 1;
        }
    }

locale = this.localeData();
    output = relativeTime(this, !withSuffix, th, locale);

if (withSuffix) {
        output = locale.pastFuture(+this, output);
    }

return locale.postformat(output);
}

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