xadesjs/build/esm/dateformat.js

XML Advanced Electronic Signatures (XAdES) implementation in TypeScript/JavaScript built on XMLDSIGjs

const token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZWN]|"[^"]*"|'[^']*'/g;
const timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g;
const timezoneClip = /[^-+\dA-Z]/g;
export function dateFormat(date, mask, utc, gmt) {
    if (arguments.length === 1 && kindOf(date) === 'string' && !/\d/.test(date)) {
        mask = date;
        date = undefined;
    }
    date = date || new Date();
    if (!(date instanceof Date)) {
        date = new Date(date);
    }
    if (isNaN(date)) {
        throw TypeError('Invalid date');
    }
    mask = String(masks[mask] || mask || masks.default);
    const maskSlice = mask.slice(0, 4);
    if (maskSlice === 'UTC:' || maskSlice === 'GMT:') {
        mask = mask.slice(4);
        utc = true;
        if (maskSlice === 'GMT:') {
            gmt = true;
        }
    }
    const _ = utc ? 'getUTC' : 'get';
    const d = date[_ + 'Date']();
    const D = date[_ + 'Day']();
    const m = date[_ + 'Month']();
    const y = date[_ + 'FullYear']();
    const H = date[_ + 'Hours']();
    const M = date[_ + 'Minutes']();
    const s = date[_ + 'Seconds']();
    const L = date[_ + 'Milliseconds']();
    const o = utc ? 0 : date.getTimezoneOffset();
    const W = getWeek(date);
    const N = getDayOfWeek(date);
    const flags = {
        d,
        dd: pad(d),
        ddd: i18n.dayNames[D],
        dddd: i18n.dayNames[D + 7],
        m: m + 1,
        mm: pad(m + 1),
        mmm: i18n.monthNames[m],
        mmmm: i18n.monthNames[m + 12],
        yy: String(y).slice(2),
        yyyy: y,
        h: H % 12 || 12,
        hh: pad(H % 12 || 12),
        H,
        HH: pad(H),
        M,
        MM: pad(M),
        s,
        ss: pad(s),
        l: pad(L, 3),
        L: pad(Math.round(L / 10)),
        t: H < 12 ? i18n.timeNames[0] : i18n.timeNames[1],
        tt: H < 12 ? i18n.timeNames[2] : i18n.timeNames[3],
        T: H < 12 ? i18n.timeNames[4] : i18n.timeNames[5],
        TT: H < 12 ? i18n.timeNames[6] : i18n.timeNames[7],
        Z: gmt
            ? 'GMT'
            : utc
                ? 'UTC'
                : (String(date).match(timezone) || ['']).pop()?.replace(timezoneClip, ''),
        o: (o > 0 ? '-' : '+') + pad(Math.floor(Math.abs(o) / 60) * 100 + (Math.abs(o) % 60), 4),
        W,
        N,
    };
    return mask.replace(token, (match) => {
        if (match in flags) {
            return flags[match];
        }
        return match.slice(1, match.length - 1);
    });
}
const masks = {
    default: 'ddd mmm dd yyyy HH:MM:ss',
    shortDate: 'm/d/yy',
    mediumDate: 'mmm d, yyyy',
    longDate: 'mmmm d, yyyy',
    fullDate: 'dddd, mmmm d, yyyy',
    shortTime: 'h:MM TT',
    mediumTime: 'h:MM:ss TT',
    longTime: 'h:MM:ss TT Z',
    isoDate: 'yyyy-mm-dd',
    isoTime: 'HH:MM:ss',
    isoDateTime: `yyyy-mm-dd'T'HH:MM:sso`,
    isoUtcDateTime: `UTC:yyyy-mm-dd'T'HH:MM:ss'Z'`,
    expiresHeaderFormat: 'ddd, dd mmm yyyy HH:MM:ss Z',
};
const i18n = {
    dayNames: [
        'Sun',
        'Mon',
        'Tue',
        'Wed',
        'Thu',
        'Fri',
        'Sat',
        'Sunday',
        'Monday',
        'Tuesday',
        'Wednesday',
        'Thursday',
        'Friday',
        'Saturday',
    ],
    monthNames: [
        'Jan',
        'Feb',
        'Mar',
        'Apr',
        'May',
        'Jun',
        'Jul',
        'Aug',
        'Sep',
        'Oct',
        'Nov',
        'Dec',
        'January',
        'February',
        'March',
        'April',
        'May',
        'June',
        'July',
        'August',
        'September',
        'October',
        'November',
        'December',
    ],
    timeNames: ['a', 'p', 'am', 'pm', 'A', 'P', 'AM', 'PM'],
};
function pad(val, len = 2) {
    val = String(val);
    while (val.length < len) {
        val = '0' + val;
    }
    return val;
}
function getWeek(date) {
    const targetThursday = new Date(date.getFullYear(), date.getMonth(), date.getDate());
    targetThursday.setDate(targetThursday.getDate() - ((targetThursday.getDay() + 6) % 7) + 3);
    const firstThursday = new Date(targetThursday.getFullYear(), 0, 4);
    firstThursday.setDate(firstThursday.getDate() - ((firstThursday.getDay() + 6) % 7) + 3);
    const ds = targetThursday.getTimezoneOffset() - firstThursday.getTimezoneOffset();
    targetThursday.setHours(targetThursday.getHours() - ds);
    const weekDiff = (targetThursday.getTime() - firstThursday.getTime()) / (86400000 * 7);
    return 1 + Math.floor(weekDiff);
}
function getDayOfWeek(date) {
    let dow = date.getDay();
    if (dow === 0) {
        dow = 7;
    }
    return dow;
}
function kindOf(val) {
    if (val === null) {
        return 'null';
    }
    if (val === undefined) {
        return 'undefined';
    }
    if (typeof val !== 'object') {
        return typeof val;
    }
    if (Array.isArray(val)) {
        return 'array';
    }
    return {}.toString.call(val).slice(8, -1).toLowerCase();
}