actionhero/initializers/i18n.js

actionhero.js is a multi-transport API Server with integrated cluster capabilities and delayed tasks

'use strict';

var i18n = require('i18n');
var path = require('path');

module.exports = {
  loadPriority:  1,
  initialize: function(api, next){
    var options = api.config.i18n;
    options.directory = path.normalize(api.config.general.paths.locale[0]);
    i18n.configure(options);
    i18n.setLocale(api.config.i18n.defaultLocale);

    api.i18n = Object.assign({
      // simplistic determination of locale for connection
      determineConnectionLocale: function(connection){
        // perhpas you want to look at the `accept-language` headers from a web requests
        // perhaps your API can use a certain cookie or URL to determine locale
        return api.config.i18n.defaultLocale;
      },
      invokeConnectionLocale: function(connection){
        var cmdParts = api.config.i18n.determineConnectionLocale.split('.');
        var cmd = cmdParts.shift();
        if(cmd !== 'api'){ throw new Error('cannot operate on a method outside of the api object'); }
        var method = api.utils.stringToHash(cmdParts.join('.'));
        var locale = method(connection);
        api.i18n.setLocale(connection, locale);
      },
      localize: function(message, options){
        if(!Array.isArray(message)){ message = [message]; }
        if(!options){ options = api.i18n; }
        return api.i18n.__.apply(options, message);
      }
    }, i18n);

    next();
  }
};