browser-i18n/i18n.js at master · SNtGog/browser-i18n · GitHub

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(function(factory) {
  var root = (typeof self == 'object' && self.self === self && self) ||
            (typeof global == 'object' && global.global === global && global);

  // AMD support
  if (typeof define === 'function' && define.amd) {
      define(['jquery'], function($) {
        return factory($);
      });
  // CommonJS and Node.js module support.
  } else if (typeof exports !== 'undefined') {
      var $;
      try { $ = require('jquery'); } catch (e) {}
      // Support Node.js specific `module.exports` (which can be a function)
      if (typeof module !== 'undefined' && module.exports) {
          exports = module.exports = factory($);
      }
      // But always support CommonJS module 1.1.1 spec (`exports` cannot be a function)
      exports.I18n = factory($);
  } else {
      root.I18n = factory(root.jQuery || root.Zepto || root.ender || root.$);
  }

})(function($) {

  var I18n = function(options){
      for (var prop in options) {
          this[prop] = options[prop];
      };
      return this.getLocaleFileFromServer();
  };

  I18n.localeCache = {};

  I18n.prototype = {
      defaultLocale: "en",
      directory: "/locales",
      extension: ".json",

      setLocale: function(locale) {
        this.locale = locale;
        if (!I18n.localeCache.get(locale)) {
          this.getLocaleFileFromServer(locale);
        }
        return this;
      },

      getLocale: function(){
          return navigator.language;
      },

      _getLocaleFileFromServer: function(locale) {
        return $.ajax({
          url: this.directory + "/" + locale + this.extension,
          dataType: 'json',
          async: true
        });
      },

      getLocaleFileFromServer: function() {
        var _this = this,
            deferred = $.Deferred();

        this.locale = this.locale || this.getLocale();
        this._getLocaleFileFromServer(this.locale)
          .done(function(localeFile) {
            I18n.localeCache[_this.locale] = localeFile;
            deferred.resolve(_this);
          })
          .fail(function(res) {
            _this.locale = _this.defaultLocale;
            localeFile = _this._getLocaleFileFromServer(_this.defaultLocale)
              .done(function(localeFile) {
                I18n.localeCache[_this.locale] = localeFile;
                deferred.resolve(_this);
              })
              .fail(function(res) {
                deferred.reject(_this);
              });
          });

        return deferred;
      },

      __: function(){
          var msg = I18n.localeCache[this.locale][arguments[0]];

          if (arguments.length > 1)
              msg = vsprintf(msg, Array.prototype.slice.call(arguments, 1));

          return msg;
      },

      __n: function(singular, count){
          var msg = I18n.localeCache[this.locale][singular];

          count = parseInt(count, 10);
          if(count === 0)
              msg = msg.zero;
          else
              msg = count > 1 ? msg.other : msg.one;

          msg = vsprintf(msg, [count]);

          if (arguments.length > 2)
              msg = vsprintf(msg, Array.prototype.slice.call(arguments, 2));

          return msg;
      }
  };

  return I18n;
});