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var languages = require('languages4translatewiki')
, fs = require('fs')
, path = require('path')
, express = require('express')
, _ = require('underscore')
, npm = require('npm')
, plugins = require('ep_etherpad-lite/static/js/pluginfw/plugins.js').plugins
;
// return all files languages absolute path group by langcode
// {es: [pathcore, pathplugin1...], en:...}
function getAllLocales() {
var locales2paths = {};
// Puts the paths of all locale files contained in a given directory
// into `results` (files from various dirs are grouped by lang code)
// (only json files with valid language code as name)
function extractLangs(dir) {
if(!fs.existsSync(dir)) return;
var stat = fs.lstatSync(dir);
if (!stat.isDirectory() || stat.isSymbolicLink()) return;
fs.readdirSync(dir).forEach(function(file) {
file = path.resolve(dir, file);
stat = fs.lstatSync(file);
if (stat.isDirectory() || stat.isSymbolicLink()) return;
var ext = path.extname(file)
, locale = path.basename(file, ext).toLowerCase();
if ((ext == '.json') && languages.isValid(locale)) {
if(!locales2paths[locale]) locales2paths[locale] = [];
locales2paths[locale].push(file);
}
});
}
//add core supported languages first
extractLangs(npm.root+"/ep_etherpad-lite/locales");
//add plugins languages (if any)
for(var pluginName in plugins) extractLangs(path.join(npm.root, pluginName, 'locales'));
// Build a locale index (merge all locale data)
var locales = {}
_.each (locales2paths, function(files, langcode) {
locales[langcode]={};
files.forEach(function(file) {
var fileContents = JSON.parse(fs.readFileSync(file,'utf8'));
_.extend(locales[langcode], fileContents[langcode]);
});
});
return locales;
}
// returns a hash of all available languages availables with nativeName and direction
// e.g. { es: {nativeName: "español", direction: "ltr"}, ... }
function getAvailableLangs(locales) {
var result = {};
_.each(_.keys(locales), function(langcode) {
result[langcode] = languages.getLanguageInfo(langcode);
});
return result;
}
// returns locale index that will be served in /locales.json
var generateLocaleIndex = function (locales) {
var result = _.clone(locales) // keep English strings
_.each(_.keys(locales), function(langcode) {
if (langcode != 'en') result[langcode]='locales/'+langcode+'.json';
});
return JSON.stringify(result);
}
exports.expressCreateServer = function(n, args) {
//regenerate locales on server restart
var locales = getAllLocales();
var localeIndex = generateLocaleIndex(locales);
exports.availableLangs = getAvailableLangs(locales);
args.app.get ('/locales/:locale', function(req, res) {
//works with /locale/en and /locale/en.json requests
var locale = req.params.locale.split('.')[0];
if (exports.availableLangs.hasOwnProperty(locale)) {
res.setHeader('Content-Type', 'application/json; charset=utf-8');
res.send('{"'+locale+'":'+JSON.stringify(locales[locale])+'}');
} else {
res.send(404, 'Language not available');
}
})
args.app.get('/locales.json', function(req, res) {
res.setHeader('Content-Type', 'application/json; charset=utf-8');
res.send(localeIndex);
})
}
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