I18n - JavaScript and CoffeeScript

I18n.coffee

###
# I18n class
# Allow you to add Internationalization to your CoffeeScript application
#
# Just call it with a `require 'util/I18n'` or `new I18n` if you don't have a `require` system
# More informations here: https://github.com/Tronix117/tradify
# Translation files should be saved in `locales/{langage code}.coffee`
#
# Then you can translate everything with `tr('{0} day', numberOfDay)`
#
# @author Jeremy Trufier <[email protected]>
###

class I18n 

  constructor: ->
    @locale = 'en'
    @translations = []

    window.tr = @tr

    code = @getLanguageCode()

    pf = [
      code.language + '-' + code.region
      code.language + '-' + code.region.toUpperCase()
      code.language + '_' + code.region
      code.language + '_' + code.region.toUpperCase()
      code.language
      code.language.toUpperCase()
      code.region
      code.region.toUpperCase()
      @locale
    ]

    while pf.length and not @translations.length
      try @translations = require('locales/'+pf.shift()) catch e

    @

  getLanguageCode: ->
    lang = (window.navigator.userLanguage || window.navigator.language || 'en').toLowerCase().match(/(\w\w)[-_]?(\w\w)?/)
    { language: lang[1], region: lang[2] || lang[1] }

  # i18n
  # How is it working ?
  #
  # tr(string, arg1, arg2, ...)
  # 
  # Inside the first argument, to write some arguments the format is:
  # {0} -> write arguments 1
  # {1} -> write arguments 2
  # ...
  # {0s} -> translator help: type, can be: s(tring), i(nteger), f(loat), d(ate)
  # {0#Date field} -> Comment for the translator
  # {0i#Number} -> guess !
  tr: (s)=>
    t = @translations[s] = [].concat(@translations[s] || [])

    a = arguments
    i = 0    
    while i < t.length
      s = if typeof t[i] is "function" then t[i].apply(this, a) else t[i]
      i += 1
    (DEV&&'@'||'') + s.replace /{(\d+)\w?(#.*)?}/g, (n, c) ->
      a[c]  if a[c = parseInt(c) + 1]

module.exports = new I18n

I18n.js

/*
 * I18n class
 * Allow you to add Internationalization to your CoffeeScript application
 *
 * Just call it with a `require 'util/I18n'` or `new I18n` if you don't have a `require` system
 * More informations here: https://github.com/Tronix117/tradify
 * Translation files should be saved in `locales/{langage code}.coffee`
 *
 * Then you can translate everything with `tr('{0} day', numberOfDay)`
 * @author Jeremy Trufier <[email protected]>
 */

getLanguageCode = function() {
    var lang;
    lang = (window.navigator.userLanguage || window.navigator.language || 'en').toLowerCase().match(/(\w\w)[-_]?(\w\w)?/);
    return {
      language: lang[1],
      region: lang[2] || lang[1]
    };
  };

  window.tr = function(s) {
    var a, i, t;
    t = T[s] = [].concat(T[s] || []);
    a = arguments;
    i = 0;
    while (i < t.length) {
      s = typeof t[i] === "function" ? t[i].apply(this, a) : t[i];
      i += 1;
    }
    return '' + s.replace(/{(\d+)\w?(#.*?)?}/g, function(n, c) {
      if (a[c = parseInt(c) + 1]) {
        return a[c];
      }
    });
  };

  window.trw = function(){ document.write(tr.apply(null, arguments)) }

  T=[];
  document.write('<script src="locales/' + getLanguageCode().language + '.js"></script>');