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- 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);
- }
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