import isNumber from '../utils/is-number';
import { getLocale } from './locales';
import { createUTC } from '../create/utc';
function get (format, index, field, setter) {
var locale = getLocale();
var utc = createUTC().set(setter, index);
return locale[field](utc, format);
}
function listMonthsImpl (format, index, field) {
if (isNumber(format)) {
index = format;
format = undefined;
}
format = format || '';
if (index != null) {
return get(format, index, field, 'month');
}
var i;
var out = [];
for (i = 0; i < 12; i++) {
out[i] = get(format, i, field, 'month');
}
return out;
}
// ()
// (5)
// (fmt, 5)
// (fmt)
// (true)
// (true, 5)
// (true, fmt, 5)
// (true, fmt)
function listWeekdaysImpl (localeSorted, format, index, field) {
if (typeof localeSorted === 'boolean') {
if (isNumber(format)) {
index = format;
format = undefined;
}
format = format || '';
} else {
format = localeSorted;
index = format;
localeSorted = false;
if (isNumber(format)) {
index = format;
format = undefined;
}
format = format || '';
}
var locale = getLocale(),
shift = localeSorted ? locale._week.dow : 0;
if (index != null) {
return get(format, (index + shift) % 7, field, 'day');
}
var i;
var out = [];
for (i = 0; i < 7; i++) {
out[i] = get(format, (i + shift) % 7, field, 'day');
}
return out;
}
export function listMonths (format, index) {
return listMonthsImpl(format, index, 'months');
}
export function listMonthsShort (format, index) {
return listMonthsImpl(format, index, 'monthsShort');
}
export function listWeekdays (localeSorted, format, index) {
return listWeekdaysImpl(localeSorted, format, index, 'weekdays');
}
export function listWeekdaysShort (localeSorted, format, index) {
return listWeekdaysImpl(localeSorted, format, index, 'weekdaysShort');
}
export function listWeekdaysMin (localeSorted, format, index) {
return listWeekdaysImpl(localeSorted, format, index, 'weekdaysMin');
}
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