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Edit File: week-year.js

import { addFormatToken } from '../format/format';
import {
    addRegexToken,
    match1to2,
    match1to4,
    match1to6,
    match2,
    match4,
    match6,
    matchSigned,
} from '../parse/regex';
import { addWeekParseToken } from '../parse/token';
import {
    weekOfYear,
    weeksInYear,
    dayOfYearFromWeeks,
} from './week-calendar-utils';
import toInt from '../utils/to-int';
import { hooks } from '../utils/hooks';
import { createUTCDate } from '../create/date-from-array';

// FORMATTING

addFormatToken(0, ['gg', 2], 0, function () {
    return this.weekYear() % 100;
});

addFormatToken(0, ['GG', 2], 0, function () {
    return this.isoWeekYear() % 100;
});

function addWeekYearFormatToken(token, getter) {
    addFormatToken(0, [token, token.length], 0, getter);
}

addWeekYearFormatToken('gggg', 'weekYear');
addWeekYearFormatToken('ggggg', 'weekYear');
addWeekYearFormatToken('GGGG', 'isoWeekYear');
addWeekYearFormatToken('GGGGG', 'isoWeekYear');

// ALIASES

// PARSING

addRegexToken('G', matchSigned);
addRegexToken('g', matchSigned);
addRegexToken('GG', match1to2, match2);
addRegexToken('gg', match1to2, match2);
addRegexToken('GGGG', match1to4, match4);
addRegexToken('gggg', match1to4, match4);
addRegexToken('GGGGG', match1to6, match6);
addRegexToken('ggggg', match1to6, match6);

addWeekParseToken(
    ['gggg', 'ggggg', 'GGGG', 'GGGGG'],
    function (input, week, config, token) {
        week[token.substr(0, 2)] = toInt(input);
    }
);

addWeekParseToken(['gg', 'GG'], function (input, week, config, token) {
    week[token] = hooks.parseTwoDigitYear(input);
});

// MOMENTS

export function getSetWeekYear(input) {
    return getSetWeekYearHelper.call(
        this,
        input,
        this.week(),
        this.weekday() + this.localeData()._week.dow,
        this.localeData()._week.dow,
        this.localeData()._week.doy
    );
}

export function getSetISOWeekYear(input) {
    return getSetWeekYearHelper.call(
        this,
        input,
        this.isoWeek(),
        this.isoWeekday(),
        1,
        4
    );
}

export function getISOWeeksInYear() {
    return weeksInYear(this.year(), 1, 4);
}

export function getISOWeeksInISOWeekYear() {
    return weeksInYear(this.isoWeekYear(), 1, 4);
}

export function getWeeksInYear() {
    var weekInfo = this.localeData()._week;
    return weeksInYear(this.year(), weekInfo.dow, weekInfo.doy);
}

export function getWeeksInWeekYear() {
    var weekInfo = this.localeData()._week;
    return weeksInYear(this.weekYear(), weekInfo.dow, weekInfo.doy);
}

function setWeekAll(weekYear, week, weekday, dow, doy) {
    var dayOfYearData = dayOfYearFromWeeks(weekYear, week, weekday, dow, doy),
        date = createUTCDate(dayOfYearData.year, 0, dayOfYearData.dayOfYear);

this.year(date.getUTCFullYear());
    this.month(date.getUTCMonth());
    this.date(date.getUTCDate());
    return this;
}

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