feat: i18n middleware

feat: i18n configuration.
feat: i18n with tenancy.

server/src/loaders/dependencyInjector.ts

@@ -4,6 +4,7 @@ import agendaFactory from '@/loaders/agenda';
 import SmsClientLoader from '@/loaders/smsClient';
 import mailInstance from '@/loaders/mail';
 import dbManagerFactory from '@/loaders/dbManager';
+import i18n from '@/loaders/i18n';
 
 export default ({ mongoConnection, knex }) => {
   try {
@@ -29,6 +30,9 @@ export default ({ mongoConnection, knex }) => {
     Container.set('agenda', agendaInstance);
     LoggerInstance.info('Agenda has been injected into container');
 
+    Container.set('i18n', i18n);
+    LoggerInstance.info('i18n has been injected into container');
+
     return { agenda: agendaInstance };
   } catch (e) {
     LoggerInstance.error('Error on dependency injector loader: %o', e);

server/src/loaders/express.ts

@@ -2,20 +2,42 @@ import express from 'express';
 import helmet from 'helmet';
 import boom from 'express-boom';
 import errorHandler from 'errorhandler';
-import i18n from 'i18n';
 import fileUpload from 'express-fileupload';
+import i18n from 'i18n';
 import routes from '@/http';
+import config from '@/../config/config';
 
 export default ({ app }) => {
   // Express configuration.
   app.set('port', 3000);
 
+  // Helmet helps you secure your Express apps by setting various HTTP headers.
   app.use(helmet());
+
+  // Allow to full error stack traces and internal details 
   app.use(errorHandler());
+
+  // Boom response objects.
   app.use(boom());
+
+  // Parses both json and urlencoded.
   app.use(express.json());
+
+  // Handle multi-media requests.
   app.use(fileUpload({
     createParentPath: true,
   }));
-  routes(app);
+
+  // Initialize i18n node.
+  app.use(i18n.init)
+
+  // Prefix all application routes.
+  app.use(config.api.prefix, routes());
+
+  // catch 404 and forward to error handler
+  app.use((req, res, next) => {
+    const err = new Error('Not Found');
+    err['status'] = 404;
+    next(err);
+  })
 };

server/src/loaders/i18n.ts

@@ -0,0 +1,9 @@
+import i18n from 'i18n';
+import path from 'path';
+
+export default () => i18n.configure({
+  locales: ['en', 'ar'],
+  register: global,
+  directory: path.join(global.rootPath, 'src/locales'),
+  updateFiles: false
+})

server/src/loaders/index.ts

@@ -5,6 +5,7 @@ import expressLoader from '@/loaders/express';
 import databaseLoader from '@/database/knex';
 import dependencyInjectorLoader from '@/loaders/dependencyInjector';
 import objectionLoader from '@/database/objection';
+import i18nConfig from '@/loaders/i18n';
 
 // We have to import at least all the events once so they can be triggered
 import '@/loaders/events';
@@ -29,4 +30,7 @@ export default async ({ expressApp }) => {
 
   expressLoader({ app: expressApp });
   Logger.info('Express loaded');
+
+  i18nConfig();
+  Logger.info('I18n node configured.');
 };