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node-red/red/api/locales.js

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/**
* Copyright JS Foundation and other contributors, http://js.foundation
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*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var fs = require('fs');
var path = require('path');
var i18n;
var supportedLangs = [];
var apiLocalDir = path.resolve(path.join(__dirname,"locales"));
var initSupportedLangs = function() {
fs.readdir(apiLocalDir, function(err,files) {
if(!err) {
supportedLangs = files;
}
});
}
function determineLangFromHeaders(acceptedLanguages){
var lang = i18n.defaultLang;
acceptedLanguages = acceptedLanguages || [];
for (var i=0;i<acceptedLanguages.length;i++){
if (supportedLangs.indexOf(acceptedLanguages[i]) !== -1){
lang = acceptedLanguages[i];
break;
// check the language without the country code
} else if (supportedLangs.indexOf(acceptedLanguages[i].split("-")[0]) !== -1) {
lang = acceptedLanguages[i].split("-")[0];
break;
}
}
return lang;
}
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module.exports = {
init: function(runtime) {
i18n = runtime.i18n;
initSupportedLangs();
},
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get: function(req,res) {
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var namespace = req.params[0];
namespace = namespace.replace(/\.json$/,"");
var lang = determineLangFromHeaders(req.acceptsLanguages() || []);
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var prevLang = i18n.i.lng();
i18n.i.setLng(lang, function(){
var catalog = i18n.catalog(namespace,lang);
res.json(catalog||{});
});
i18n.i.setLng(prevLang);
},
determineLangFromHeaders: determineLangFromHeaders
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}