yoanm / alfred-personal-assistant

server/lang.js

var fs      = require('fs');

var extend  = require('extend');

var express = require('express');

var l10n    = require('i18n');

var marked  = require('marked');


// ------------------------------------------

//  CONSTRUCTOR

// ------------------------------------------


var init = function(){

  info('Starting LangManager ...', (__dirname + '/../locales'));

  

  l10n.extendRead = extendRead;

  

  l10n.configure({

    locales: ['en', 'fr'],

    cookie: COOKIE,

    updateFiles: false,

    directory: __dirname + '/../locales'

  });

  

  // Set global variable i18n

  global.i18n = function(key){

   var value = l10n.__.apply(this, arguments);

   var def   = arguments[arguments.length - 1];

   if (value == key) return def;

   return value;

  };

  

  // Set global variable markdown

  global.marked = markdown;

  

  return LangManager;

}


var markdown  = function(path){

  var lang = l10n.getLocale()

  

  var path = SARAH.ConfigManager.PLUGIN + '/' + path.replace('/','/locales/') + '.' + lang + '.md'; 

  if (!fs.existsSync(path)){ return; }

    

  var markdown = fs.readFileSync(path, 'utf8');

  return '<div class="markdown">' + marked(markdown) + '</div>';

}


var extendRead = function(locale){

  info('Loading all locales %s', locale);

  

  var prop = {};

  

  // Load core locales

  var path = __dirname + '/../locales/' + locale + '.js';

  if (fs.existsSync(path)){

    try {

      var json = fs.readFileSync(path, 'utf8');

      var core = JSON.parse(json);

      extend(true, prop, core);

    } 

    catch(ex){ warn("Can't parse core locale in %s", locale); }

  }

  

  // Load plugins locales

  var plugins = SARAH.PluginManager.getLocales(locale);

  extend(true, prop, plugins);

  

  return prop;

}


// ------------------------------------------

//  ROUTER

// ------------------------------------------


var COOKIE = 'sarah-lang'

var Router = express.Router();


// Set lang according to cookie

Router.get('*', function(req, res, next) {

  var lang = req.cookies[COOKIE] || 'fr';

  l10n.setLocale(lang);

  res.locals.lang = lang;

  next();

})


// Set lang according to URL

Router.get('/lang/:lang', function(req, res, next) { 

The parameter next is not used and could be removed.

  var lang = req.params.lang;

  info('Update language to %s', lang);

  l10n.setLocale(lang);

  res.cookie(COOKIE, lang, { maxAge: 900000 });

  res.redirect('/');

});


// ------------------------------------------

//  PUBLIC

// ------------------------------------------


var LangManager = {

  'init' : init,

  'Router' : Router

}


// Exports Manager

exports.init = LangManager.init;