import { addFormatToken } from ‘../format/format’; import { addUnitAlias } from ‘./aliases’; import { addRegexToken, match3, match1to3 } from ‘../parse/regex’; import { daysInYear } from ‘./year’; import { createUTCDate } from ‘../create/date-from-array’; import { addParseToken } from ‘../parse/token’; import toInt from ‘../utils/to-int’;

// FORMATTING

addFormatToken(‘DDD’, [‘DDDD’, 3], ‘DDDo’, ‘dayOfYear’);

// ALIASES

addUnitAlias(‘dayOfYear’, ‘DDD’);

// PARSING

addRegexToken(‘DDD’, match1to3); addRegexToken(‘DDDD’, match3); addParseToken([‘DDD’, ‘DDDD’], function (input, array, config) {

config._dayOfYear = toInt(input);

});

// HELPERS

//http://en.wikipedia.org/wiki/ISO_week_date#Calculating_a_date_given_the_year.2C_week_number_and_weekday export function dayOfYearFromWeeks(year, week, weekday, firstDayOfWeekOfYear, firstDayOfWeek) {

var d = createUTCDate(year, 0, 1).getUTCDay();
var daysToAdd;
var dayOfYear;

d = d === 0 ? 7 : d;
weekday = weekday != null ? weekday : firstDayOfWeek;
daysToAdd = firstDayOfWeek - d + (d > firstDayOfWeekOfYear ? 7 : 0) - (d < firstDayOfWeek ? 7 : 0);
dayOfYear = 7 * (week - 1) + (weekday - firstDayOfWeek) + daysToAdd + 1;

return {
    year      : dayOfYear > 0 ? year      : year - 1,
    dayOfYear : dayOfYear > 0 ? dayOfYear : daysInYear(year - 1) + dayOfYear
};

}

// MOMENTS

export function getSetDayOfYear (input) {

var dayOfYear = Math.round((this.clone().startOf('day') - this.clone().startOf('year')) / 864e5) + 1;
return input == null ? dayOfYear : this.add((input - dayOfYear), 'd');

}