app.js full

app.js

  var createError = require('http-errors');
  var express = require('express');
  var path = require('path');
  var cookieParser = require('cookie-parser');
  var logger = require('morgan');

  var indexRouter = require('./routes/index');
  var usersRouter = require('./routes/users');

  var app = express();
  const i18next = require('i18next');
  const i18nextMiddleware = require('i18next-express-middleware');
  const Backend = require('i18next-node-fs-backend');


  i18next
    .use(i18nextMiddleware.LanguageDetector)
    .use(Backend)
    .init({
      backend: {
        loadPath: __dirname + '/locales/{{lng}}/{{ns}}.json'
      },
      debug: true,
      detection: {
        order: ['querystring', 'cookie'],
        caches: ['cookie']
      },
      preload: ['en', 'ru'],
      saveMissing: true,
      fallBackLng: ['en']

    });
  app.use(i18nextMiddleware.handle(i18next));

  // view engine setup
  app.set('views', path.join(__dirname, 'views'));
  app.set('view engine', 'pug');

  app.use(logger('dev'));
  app.use(express.json());
  app.use(express.urlencoded({ extended: false }));
  app.use(cookieParser());
  app.use(express.static(path.join(__dirname, 'public')));

  app.use('/', indexRouter);
  app.use('/users', usersRouter);

  // catch 404 and forward to error handler
  app.use(function(req, res, next) {
    next(createError(404));
  });

  // error handler
  app.use(function(err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};

    // render the error page
    res.status(err.status || 500);
    res.render('error');
  });

  module.exports = app;