sugar/date/internal/getWeekYear.js

A Javascript utility library for working with native objects.

'use strict';

var LocaleHelpers = require('../var/LocaleHelpers'),
    getYear = require('./getYear'),
    getMonth = require('./getMonth'),
    getWeekNumber = require('./getWeekNumber');

var localeManager = LocaleHelpers.localeManager;

function getWeekYear(d, localeCode, iso) {
  var year, month, firstDayOfWeek, firstDayOfWeekYear, week, loc;
  year = getYear(d);
  month = getMonth(d);
  if (month === 0 || month === 11) {
    if (!iso) {
      loc = localeManager.get(localeCode);
      firstDayOfWeek = loc.getFirstDayOfWeek(localeCode);
      firstDayOfWeekYear = loc.getFirstDayOfWeekYear(localeCode);
    }
    week = getWeekNumber(d, false, firstDayOfWeek, firstDayOfWeekYear);
    if (month === 0 && week === 0) {
      year -= 1;
    } else if (month === 11 && week === 1) {
      year += 1;
    }
  }
  return year;
}

module.exports = getWeekYear;