locale/lib/index.js

Browser locale negotiation for node.js

// Generated by CoffeeScript 1.6.3
(function() {
  var Locale, Locales, app, _ref,
    __slice = [].slice;

  app = function(supported, def) {
    if (!(supported instanceof Locales)) {
      supported = new Locales(supported, def);
      supported.index();
    }
    return function(req, res, next) {
      var bestLocale, locales;
      locales = new Locales(req.headers["accept-language"]);
      bestLocale = locales.best(supported);
      req.locale = String(bestLocale);
      req.rawLocale = bestLocale;
      return next();
    };
  };

  app.Locale = (function() {
    var serialize;

    Locale["default"] = new Locale(process.env.LANG || "en_US");

    function Locale(str) {
      var country, language, match, normalized;
      if (!(match = str != null ? str.match(/[a-z]+/gi) : void 0)) {
        return;
      }
      language = match[0], country = match[1];
      this.code = str;
      this.language = language.toLowerCase();
      if (country) {
        this.country = country.toUpperCase();
      }
      normalized = [this.language];
      if (this.country) {
        normalized.push(this.country);
      }
      this.normalized = normalized.join("_");
    }

    serialize = function() {
      if (this.language) {
        return this.code;
      } else {
        return null;
      }
    };

    Locale.prototype.toString = serialize;

    Locale.prototype.toJSON = serialize;

    return Locale;

  })();

  app.Locales = (function() {
    var serialize;

    Locales.prototype.length = 0;

    Locales.prototype._index = null;

    Locales.prototype.sort = Array.prototype.sort;

    Locales.prototype.push = Array.prototype.push;

    function Locales(str, def) {
      var item, locale, q, _i, _len, _ref, _ref1;
      if (def) {
        this["default"] = new Locale(def);
      }
      if (!str) {
        return;
      }
      _ref = (String(str)).split(",");
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        item = _ref[_i];
        _ref1 = item.split(";"), locale = _ref1[0], q = _ref1[1];
        locale = new Locale(locale.trim());
        locale.score = q ? +q.slice(2) || 0 : 1;
        this.push(locale);
      }
      this.sort(function(a, b) {
        return b.score - a.score;
      });
    }

    Locales.prototype.index = function() {
      var idx, locale, _i, _len;
      if (!this._index) {
        this._index = {};
        for (idx = _i = 0, _len = this.length; _i < _len; idx = ++_i) {
          locale = this[idx];
          this._index[locale.normalized] = idx;
        }
      }
      return this._index;
    };

    Locales.prototype.best = function(locales) {
      var index, item, l, languageIndex, locale, normalizedIndex, setLocale, _i, _j, _len, _len1;
      setLocale = function(l) {
        var r;
        r = l;
        r.defaulted = false;
        return r;
      };
      locale = Locale["default"];
      if (locales && locales["default"]) {
        locale = locales["default"];
      }
      locale.defaulted = true;
      if (!locales) {
        if (this[0]) {
          locale = this[0];
          locale.defaulted = true;
        }
        return locale;
      }
      index = locales.index();
      for (_i = 0, _len = this.length; _i < _len; _i++) {
        item = this[_i];
        normalizedIndex = index[item.normalized];
        languageIndex = index[item.language];
        if (normalizedIndex != null) {
          return setLocale(locales[normalizedIndex]);
        } else if (languageIndex != null) {
          return setLocale(locales[languageIndex]);
        } else {
          for (_j = 0, _len1 = locales.length; _j < _len1; _j++) {
            l = locales[_j];
            if (l.language === item.language) {
              return setLocale(l);
            }
          }
        }
      }
      return locale;
    };

    serialize = function() {
      return __slice.call(this);
    };

    Locales.prototype.toJSON = serialize;

    Locales.prototype.toString = function() {
      return String(this.toJSON());
    };

    return Locales;

  })();

  _ref = module.exports = app, Locale = _ref.Locale, Locales = _ref.Locales;

}).call(this);