• Classes
• Modules
• Everything

 var _mods = {},
 
 ROOT_LANG = "yuiRootLang",
 ACTIVE_LANG = "yuiActiveLang",
 NONE = [];
 
 /**
 * Provides utilities to support the management of localized resources (strings and formatting patterns).
 *
 * @module intl
 */
 
 /**
 * The Intl utility provides a central location for managing sets of localized resources (strings and formatting patterns).
 *
 * @class Intl
 * @uses EventTarget
 * @static
 */
 Y.mix(Y.namespace("Intl"), {
 
 /**
 * Private method to retrieve the language hash for a given module.
 *
 * @method _mod
 * @private
 *
 * @param {String} module The name of the module
 * @return {Object} The hash of localized resources for the module, keyed by BCP language tag
 */
 _mod : function(module) {
 if (!_mods[module]) {
 _mods[module] = {};
 }
 return _mods[module];
 },
 
 /**
 * Sets the active language for the given module.
 *
 * Returns false on failure, which would happen if the language had not been registered through the <a href="#method_add">add()</a> method.
 *
 * @method setLang
 *
 * @param {String} module The module name.
 * @param {String} lang The BCP 47 language tag.
 * @return boolean true if successful, false if not.
 */
 setLang : function(module, lang) {
 var langs = this._mod(module),
 currLang = langs[ACTIVE_LANG],
 exists = !!langs[lang];
 
 if (exists && lang !== currLang) {
 langs[ACTIVE_LANG] = lang;
 this.fire("intl:langChange", {module: module, prevVal: currLang, newVal: (lang === ROOT_LANG) ? "" : lang});
 }
 
 return exists;
 },
 
 /**
 * Get the currently active language for the given module.
 *
 * @method getLang
 *
 * @param {String} module The module name.
 * @return {String} The BCP 47 language tag.
 */
 getLang : function(module) {
 var lang = this._mod(module)[ACTIVE_LANG];
 return (lang === ROOT_LANG) ? "" : lang;
 },
 
 /**
 * Register a hash of localized resources for the given module and language
 *
 * @method add
 *
 * @param {String} module The module name.
 * @param {String} lang The BCP 47 language tag.
 * @param {Object} strings The hash of localized values, keyed by the string name.
 */
 add : function(module, lang, strings) {
 lang = lang || ROOT_LANG;
 this._mod(module)[lang] = strings;
 this.setLang(module, lang);
 },
 
 /**
 * Gets the module's localized resources for the currently active language (as provided by the <a href="#method_getLang">getLang</a> method).
 * <p>
 * Optionally, the localized resources for alternate languages which have been added to Intl (see the <a href="#method_add">add</a> method) can
 * be retrieved by providing the BCP 47 language tag as the lang parameter.
 * </p>
 * @method get
 *
 * @param {String} module The module name.
 * @param {String} key Optional. A single resource key. If not provided, returns a copy (shallow clone) of all resources.
 * @param {String} lang Optional. The BCP 47 language tag. If not provided, the module's currently active language is used.
 * @return String | Object A copy of the module's localized resources, or a single value if key is provided.
 */
 get : function(module, key, lang) {
 var mod = this._mod(module),
 strs;
 
 lang = lang || mod[ACTIVE_LANG];
 strs = mod[lang] || {};
 
 return (key) ? strs[key] : Y.merge(strs);
 },
 
 /**
 * Gets the list of languages for which localized resources are available for a given module, based on the module
 * meta-data (part of loader). If loader is not on the page, returns an empty array.
 *
 * @method getAvailableLangs
 * @param {String} module The name of the module
 * @return {Array} The array of languages available.
 */
 getAvailableLangs : function(module) {
 var loader = Y.Env._loader,
 mod = loader && loader.moduleInfo[module],
 langs = mod && mod.lang;
 return (langs) ? langs.concat() : NONE;
 
 }
 });
 
 Y.augment(Y.Intl, Y.EventTarget);
 
 /**
 * Notification event to indicate when the lang for a module has changed. There is no default behavior associated with this event,
 * so the on and after moments are equivalent.
 *
 * @event intl:langChange
 * @param {EventFacade} e The event facade
 * <p>The event facade contains:</p>
 * <dl>
 * <dt>module</dt><dd>The name of the module for which the language changed</dd>
 * <dt>newVal</dt><dd>The new language tag</dd>
 * <dt>prevVal</dt><dd>The current language tag</dd>
 * </dl>
 */
 Y.Intl.publish("intl:langChange", {emitFacade:true});