import { addFormatToken } from '../format/format';
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import { addUnitAlias } from './aliases';
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import { addRegexToken, match3, match1to3 } from '../parse/regex';
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import { daysInYear } from './year';
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import { createUTCDate } from '../create/date-from-array';
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import { addParseToken } from '../parse/token';
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import toInt from '../utils/to-int';
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// FORMATTING
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addFormatToken('DDD', ['DDDD', 3], 'DDDo', 'dayOfYear');
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// ALIASES
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addUnitAlias('dayOfYear', 'DDD');
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// PARSING
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addRegexToken('DDD', match1to3);
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addRegexToken('DDDD', match3);
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addParseToken(['DDD', 'DDDD'], function (input, array, config) {
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config._dayOfYear = toInt(input);
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});
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// HELPERS
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//http://en.wikipedia.org/wiki/ISO_week_date#Calculating_a_date_given_the_year.2C_week_number_and_weekday
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export function dayOfYearFromWeeks(year, week, weekday, firstDayOfWeekOfYear, firstDayOfWeek) {
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var week1Jan = 6 + firstDayOfWeek - firstDayOfWeekOfYear, janX = createUTCDate(year, 0, 1 + week1Jan), d = janX.getUTCDay(), dayOfYear;
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if (d < firstDayOfWeek) {
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d += 7;
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}
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weekday = weekday != null ? 1 * weekday : firstDayOfWeek;
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dayOfYear = 1 + week1Jan + 7 * (week - 1) - d + weekday;
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return {
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year: dayOfYear > 0 ? year : year - 1,
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dayOfYear: dayOfYear > 0 ? dayOfYear : daysInYear(year - 1) + dayOfYear
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};
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}
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// MOMENTS
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export function getSetDayOfYear (input) {
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var dayOfYear = Math.round((this.clone().startOf('day') - this.clone().startOf('year')) / 864e5) + 1;
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return input == null ? dayOfYear : this.add((input - dayOfYear), 'd');
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}
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