import { get } from '../moment/get-set';
import hasOwnProp from '../utils/has-own-prop';
import { addFormatToken } from '../format/format';
import {
addRegexToken,
match1to2,
match2,
matchWord,
regexEscape,
match1to2NoLeadingZero,
} from '../parse/regex';
import { addParseToken } from '../parse/token';
import { hooks } from '../utils/hooks';
import { MONTH } from './constants';
import toInt from '../utils/to-int';
import isArray from '../utils/is-array';
import isNumber from '../utils/is-number';
import mod from '../utils/mod';
import indexOf from '../utils/index-of';
import { createUTC } from '../create/utc';
import getParsingFlags from '../create/parsing-flags';
import { isLeapYear } from '../utils/is-leap-year';
export function daysInMonth(year, month) {
if (isNaN(year) || isNaN(month)) {
return NaN;
}
var modMonth = mod(month, 12);
year += (month - modMonth) / 12;
return modMonth === 1
? isLeapYear(year)
? 29
: 28
: 31 - ((modMonth % 7) % 2);
}
// FORMATTING
addFormatToken('M', ['MM', 2], 'Mo', function () {
return this.month() + 1;
});
addFormatToken('MMM', 0, 0, function (format) {
return this.localeData().monthsShort(this, format);
});
addFormatToken('MMMM', 0, 0, function (format) {
return this.localeData().months(this, format);
});
// PARSING
addRegexToken('M', match1to2, match1to2NoLeadingZero);
addRegexToken('MM', match1to2, match2);
addRegexToken('MMM', function (isStrict, locale) {
return locale.monthsShortRegex(isStrict);
});
addRegexToken('MMMM', function (isStrict, locale) {
return locale.monthsRegex(isStrict);
});
addParseToken(['M', 'MM'], function (input, array) {
array[MONTH] = toInt(input) - 1;
});
addParseToken(['MMM', 'MMMM'], function (input, array, config, token) {
var month = config._locale.monthsParse(input, token, config._strict);
// if we didn't find a month name, mark the date as invalid.
if (month != null) {
array[MONTH] = month;
} else {
getParsingFlags(config).invalidMonth = input;
}
});
// LOCALES
var defaultLocaleMonths =
'January_February_March_April_May_June_July_August_September_October_November_December'.split(
'_'
),
defaultLocaleMonthsShort =
'Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec'.split('_'),
MONTHS_IN_FORMAT = /D[oD]?(\[[^\[\]]*\]|\s)+MMMM?/,
defaultMonthsShortRegex = matchWord,
defaultMonthsRegex = matchWord;
export { defaultLocaleMonths, defaultLocaleMonthsShort };
export function localeMonths(m, format) {
if (!m) {
return isArray(this._months)
? this._months
: this._months['standalone'];
}
return isArray(this._months)
? this._months[m.month()]
: this._months[
(this._months.isFormat || MONTHS_IN_FORMAT).test(format)
? 'format'
: 'standalone'
][m.month()];
}
export function localeMonthsShort(m, format) {
if (!m) {
return isArray(this._monthsShort)
? this._monthsShort
: this._monthsShort['standalone'];
}
return isArray(this._monthsShort)
? this._monthsShort[m.month()]
: this._monthsShort[
MONTHS_IN_FORMAT.test(format) ? 'format' : 'standalone'
][m.month()];
}
function handleStrictParse(monthName, format, strict) {
var i,
ii,
mom,
llc = monthName.toLocaleLowerCase();
if (!this._monthsParse) {
// this is not used
this._monthsParse = [];
this._longMonthsParse = [];
this._shortMonthsParse = [];
for (i = 0; i < 12; ++i) {
mom = createUTC([2000, i]);
this._shortMonthsParse[i] = this.monthsShort(
mom,
''
).toLocaleLowerCase();
this._longMonthsParse[i] = this.months(mom, '').toLocaleLowerCase();
}
}
if (strict) {
if (format === 'MMM') {
ii = indexOf.call(this._shortMonthsParse, llc);
return ii !== -1 ? ii : null;
} else {
ii = indexOf.call(this._longMonthsParse, llc);
return ii !== -1 ? ii : null;
}
} else {
if (format === 'MMM') {
ii = indexOf.call(this._shortMonthsParse, llc);
if (ii !== -1) {
return ii;
}
ii = indexOf.call(this._longMonthsParse, llc);
return ii !== -1 ? ii : null;
} else {
ii = indexOf.call(this._longMonthsParse, llc);
if (ii !== -1) {
return ii;
}
ii = indexOf.call(this._shortMonthsParse, llc);
return ii !== -1 ? ii : null;
}
}
}
export function localeMonthsParse(monthName, format, strict) {
var i, mom, regex;
if (this._monthsParseExact) {
return handleStrictParse.call(this, monthName, format, strict);
}
if (!this._monthsParse) {
this._monthsParse = [];
this._longMonthsParse = [];
this._shortMonthsParse = [];
}
// TODO: add sorting
// Sorting makes sure if one month (or abbr) is a prefix of another
// see sorting in computeMonthsParse
for (i = 0; i < 12; i++) {
// make the regex if we don't have it already
mom = createUTC([2000, i]);
if (strict && !this._longMonthsParse[i]) {
this._longMonthsParse[i] = new RegExp(
'^' + this.months(mom, '').replace('.', '') + '$',
'i'
);
this._shortMonthsParse[i] = new RegExp(
'^' + this.monthsShort(mom, '').replace('.', '') + '$',
'i'
);
}
if (!strict && !this._monthsParse[i]) {
regex =
'^' + this.months(mom, '') + '|^' + this.monthsShort(mom, '');
this._monthsParse[i] = new RegExp(regex.replace('.', ''), 'i');
}
// test the regex
if (
strict &&
format === 'MMMM' &&
this._longMonthsParse[i].test(monthName)
) {
return i;
} else if (
strict &&
format === 'MMM' &&
this._shortMonthsParse[i].test(monthName)
) {
return i;
} else if (!strict && this._monthsParse[i].test(monthName)) {
return i;
}
}
}
// MOMENTS
export function setMonth(mom, value) {
if (!mom.isValid()) {
// No op
return mom;
}
if (typeof value === 'string') {
if (/^\d+$/.test(value)) {
value = toInt(value);
} else {
value = mom.localeData().monthsParse(value);
// TODO: Another silent failure?
if (!isNumber(value)) {
return mom;
}
}
}
var month = value,
date = mom.date();
date = date < 29 ? date : Math.min(date, daysInMonth(mom.year(), month));
void (mom._isUTC
? mom._d.setUTCMonth(month, date)
: mom._d.setMonth(month, date));
return mom;
}
export function getSetMonth(value) {
if (value != null) {
setMonth(this, value);
hooks.updateOffset(this, true);
return this;
} else {
return get(this, 'Month');
}
}
export function getDaysInMonth() {
return daysInMonth(this.year(), this.month());
}
export function monthsShortRegex(isStrict) {
if (this._monthsParseExact) {
if (!hasOwnProp(this, '_monthsRegex')) {
computeMonthsParse.call(this);
}
if (isStrict) {
return this._monthsShortStrictRegex;
} else {
return this._monthsShortRegex;
}
} else {
if (!hasOwnProp(this, '_monthsShortRegex')) {
this._monthsShortRegex = defaultMonthsShortRegex;
}
return this._monthsShortStrictRegex && isStrict
? this._monthsShortStrictRegex
: this._monthsShortRegex;
}
}
export function monthsRegex(isStrict) {
if (this._monthsParseExact) {
if (!hasOwnProp(this, '_monthsRegex')) {
computeMonthsParse.call(this);
}
if (isStrict) {
return this._monthsStrictRegex;
} else {
return this._monthsRegex;
}
} else {
if (!hasOwnProp(this, '_monthsRegex')) {
this._monthsRegex = defaultMonthsRegex;
}
return this._monthsStrictRegex && isStrict
? this._monthsStrictRegex
: this._monthsRegex;
}
}
function computeMonthsParse() {
function cmpLenRev(a, b) {
return b.length - a.length;
}
var shortPieces = [],
longPieces = [],
mixedPieces = [],
i,
mom,
shortP,
longP;
for (i = 0; i < 12; i++) {
// make the regex if we don't have it already
mom = createUTC([2000, i]);
shortP = regexEscape(this.monthsShort(mom, ''));
longP = regexEscape(this.months(mom, ''));
shortPieces.push(shortP);
longPieces.push(longP);
mixedPieces.push(longP);
mixedPieces.push(shortP);
}
// Sorting makes sure if one month (or abbr) is a prefix of another it
// will match the longer piece.
shortPieces.sort(cmpLenRev);
longPieces.sort(cmpLenRev);
mixedPieces.sort(cmpLenRev);
this._monthsRegex = new RegExp('^(' + mixedPieces.join('|') + ')', 'i');
this._monthsShortRegex = this._monthsRegex;
this._monthsStrictRegex = new RegExp(
'^(' + longPieces.join('|') + ')',
'i'
);
this._monthsShortStrictRegex = new RegExp(
'^(' + shortPieces.join('|') + ')',
'i'
);
}
