import isArray from '../utils/is-array';
import isUndefined from '../utils/is-undefined';
import { deprecateSimple } from '../utils/deprecate';
import { mergeConfigs } from './set';
import { Locale } from './constructor';
import keys from '../utils/keys';
import { baseConfig } from './base-config';
// internal storage for locale config files
var locales = {},
localeFamilies = {},
globalLocale;
function commonPrefix(arr1, arr2) {
var i,
minl = Math.min(arr1.length, arr2.length);
for (i = 0; i < minl; i += 1) {
if (arr1[i] !== arr2[i]) {
return i;
}
}
return minl;
}
function normalizeLocale(key) {
return key ? key.toLowerCase().replace('_', '-') : key;
}
// pick the locale from the array
// try ['en-au', 'en-gb'] as 'en-au', 'en-gb', 'en', as in move through the list trying each
// substring from most specific to least, but move to the next array item if it's a more specific variant than the current root
function chooseLocale(names) {
var i = 0,
j,
next,
locale,
split;
while (i < names.length) {
split = normalizeLocale(names[i]).split('-');
j = split.length;
next = normalizeLocale(names[i + 1]);
next = next ? next.split('-') : null;
while (j > 0) {
locale = loadLocale(split.slice(0, j).join('-'));
if (locale) {
return locale;
}
if (
next &&
next.length >= j &&
commonPrefix(split, next) >= j - 1
) {
//the next array item is better than a shallower substring of this one
break;
}
j--;
}
i++;
}
return globalLocale;
}
function isLocaleNameSane(name) {
// Prevent names that look like filesystem paths, i.e contain '/' or '\'
// Ensure name is available and function returns boolean
return !!(name && name.match('^[^/\\\\]*$'));
}
function loadLocale(name) {
var oldLocale = null,
aliasedRequire;
// TODO: Find a better way to register and load all the locales in Node
if (
locales[name] === undefined &&
typeof module !== 'undefined' &&
module &&
module.exports &&
isLocaleNameSane(name)
) {
try {
oldLocale = globalLocale._abbr;
aliasedRequire = require;
aliasedRequire('./locale/' + name);
getSetGlobalLocale(oldLocale);
} catch (e) {
// mark as not found to avoid repeating expensive file require call causing high CPU
// when trying to find en-US, en_US, en-us for every format call
locales[name] = null; // null means not found
}
}
return locales[name];
}
// This function will load locale and then set the global locale. If
// no arguments are passed in, it will simply return the current global
// locale key.
export function getSetGlobalLocale(key, values) {
var data;
if (key) {
if (isUndefined(values)) {
data = getLocale(key);
} else {
data = defineLocale(key, values);
}
if (data) {
// moment.duration._locale = moment._locale = data;
globalLocale = data;
} else {
if (typeof console !== 'undefined' && console.warn) {
//warn user if arguments are passed but the locale could not be set
console.warn(
'Locale ' + key + ' not found. Did you forget to load it?'
);
}
}
}
return globalLocale._abbr;
}
export function defineLocale(name, config) {
if (config !== null) {
var locale,
parentConfig = baseConfig;
config.abbr = name;
if (locales[name] != null) {
deprecateSimple(
'defineLocaleOverride',
'use moment.updateLocale(localeName, config) to change ' +
'an existing locale. moment.defineLocale(localeName, ' +
'config) should only be used for creating a new locale ' +
'See http://momentjs.com/guides/#/warnings/define-locale/ for more info.'
);
parentConfig = locales[name]._config;
} else if (config.parentLocale != null) {
if (locales[config.parentLocale] != null) {
parentConfig = locales[config.parentLocale]._config;
} else {
locale = loadLocale(config.parentLocale);
if (locale != null) {
parentConfig = locale._config;
} else {
if (!localeFamilies[config.parentLocale]) {
localeFamilies[config.parentLocale] = [];
}
localeFamilies[config.parentLocale].push({
name: name,
config: config,
});
return null;
}
}
}
locales[name] = new Locale(mergeConfigs(parentConfig, config));
if (localeFamilies[name]) {
localeFamilies[name].forEach(function (x) {
defineLocale(x.name, x.config);
});
}
// backwards compat for now: also set the locale
// make sure we set the locale AFTER all child locales have been
// created, so we won't end up with the child locale set.
getSetGlobalLocale(name);
return locales[name];
} else {
// useful for testing
delete locales[name];
return null;
}
}
export function updateLocale(name, config) {
if (config != null) {
var locale,
tmpLocale,
parentConfig = baseConfig;
if (locales[name] != null && locales[name].parentLocale != null) {
// Update existing child locale in-place to avoid memory-leaks
locales[name].set(mergeConfigs(locales[name]._config, config));
} else {
// MERGE
tmpLocale = loadLocale(name);
if (tmpLocale != null) {
parentConfig = tmpLocale._config;
}
config = mergeConfigs(parentConfig, config);
if (tmpLocale == null) {
// updateLocale is called for creating a new locale
// Set abbr so it will have a name (getters return
// undefined otherwise).
config.abbr = name;
}
locale = new Locale(config);
locale.parentLocale = locales[name];
locales[name] = locale;
}
// backwards compat for now: also set the locale
getSetGlobalLocale(name);
} else {
// pass null for config to unupdate, useful for tests
if (locales[name] != null) {
if (locales[name].parentLocale != null) {
locales[name] = locales[name].parentLocale;
if (name === getSetGlobalLocale()) {
getSetGlobalLocale(name);
}
} else if (locales[name] != null) {
delete locales[name];
}
}
}
return locales[name];
}
// returns locale data
export function getLocale(key) {
var locale;
if (key && key._locale && key._locale._abbr) {
key = key._locale._abbr;
}
if (!key) {
return globalLocale;
}
if (!isArray(key)) {
//short-circuit everything else
locale = loadLocale(key);
if (locale) {
return locale;
}
key = [key];
}
return chooseLocale(key);
}
export function listLocales() {
return keys(locales);
}
