import { get } from '../moment/get-set';
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import { addFormatToken } from '../format/format';
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import { addUnitAlias } from './aliases';
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import { addRegexToken, match1to2, match2, matchWord } from '../parse/regex';
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import { addParseToken } from '../parse/token';
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import { hooks } from '../utils/hooks';
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import { MONTH } from './constants';
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import toInt from '../utils/to-int';
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import { createUTC } from '../create/utc';
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import getParsingFlags from '../create/parsing-flags';
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export function daysInMonth(year, month) {
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return new Date(Date.UTC(year, month + 1, 0)).getUTCDate();
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}
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// FORMATTING
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addFormatToken('M', ['MM', 2], 'Mo', function () {
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return this.month() + 1;
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});
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addFormatToken('MMM', 0, 0, function (format) {
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return this.localeData().monthsShort(this, format);
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});
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addFormatToken('MMMM', 0, 0, function (format) {
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return this.localeData().months(this, format);
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});
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// ALIASES
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addUnitAlias('month', 'M');
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// PARSING
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addRegexToken('M', match1to2);
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addRegexToken('MM', match1to2, match2);
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addRegexToken('MMM', matchWord);
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addRegexToken('MMMM', matchWord);
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addParseToken(['M', 'MM'], function (input, array) {
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array[MONTH] = toInt(input) - 1;
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});
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addParseToken(['MMM', 'MMMM'], function (input, array, config, token) {
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var month = config._locale.monthsParse(input, token, config._strict);
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// if we didn't find a month name, mark the date as invalid.
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if (month != null) {
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array[MONTH] = month;
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} else {
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getParsingFlags(config).invalidMonth = input;
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}
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});
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// LOCALES
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export var defaultLocaleMonths = 'January_February_March_April_May_June_July_August_September_October_November_December'.split('_');
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export function localeMonths (m) {
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return this._months[m.month()];
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}
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export var defaultLocaleMonthsShort = 'Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec'.split('_');
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export function localeMonthsShort (m) {
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return this._monthsShort[m.month()];
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}
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export function localeMonthsParse (monthName, format, strict) {
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var i, mom, regex;
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if (!this._monthsParse) {
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this._monthsParse = [];
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this._longMonthsParse = [];
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this._shortMonthsParse = [];
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}
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for (i = 0; i < 12; i++) {
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// make the regex if we don't have it already
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mom = createUTC([2000, i]);
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if (strict && !this._longMonthsParse[i]) {
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this._longMonthsParse[i] = new RegExp('^' + this.months(mom, '').replace('.', '') + '$', 'i');
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this._shortMonthsParse[i] = new RegExp('^' + this.monthsShort(mom, '').replace('.', '') + '$', 'i');
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}
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if (!strict && !this._monthsParse[i]) {
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regex = '^' + this.months(mom, '') + '|^' + this.monthsShort(mom, '');
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this._monthsParse[i] = new RegExp(regex.replace('.', ''), 'i');
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}
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// test the regex
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if (strict && format === 'MMMM' && this._longMonthsParse[i].test(monthName)) {
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return i;
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} else if (strict && format === 'MMM' && this._shortMonthsParse[i].test(monthName)) {
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return i;
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} else if (!strict && this._monthsParse[i].test(monthName)) {
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return i;
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}
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}
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}
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// MOMENTS
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export function setMonth (mom, value) {
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var dayOfMonth;
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// TODO: Move this out of here!
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if (typeof value === 'string') {
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value = mom.localeData().monthsParse(value);
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// TODO: Another silent failure?
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if (typeof value !== 'number') {
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return mom;
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}
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}
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dayOfMonth = Math.min(mom.date(), daysInMonth(mom.year(), value));
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mom._d['set' + (mom._isUTC ? 'UTC' : '') + 'Month'](value, dayOfMonth);
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return mom;
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}
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export function getSetMonth (value) {
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if (value != null) {
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setMonth(this, value);
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hooks.updateOffset(this, true);
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return this;
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} else {
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return get(this, 'Month');
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}
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}
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export function getDaysInMonth () {
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return daysInMonth(this.year(), this.month());
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}
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