app.js

require('dotenv').config();

const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieSession = require('cookie-session');
const logger = require('morgan');
const passport = require('passport');
const fileUpload = require('express-fileupload');
const i18n = require('i18n');
const HttpStatus = require('http-status-codes');

const routes = require('./routes');

const app = express();

/// router logging output
if (process.env.NODE_ENV !== 'test') {
  app.use(logger('dev'));
}
/// multipart file upload support (when not uploading direct to S3)
app.use(
  fileUpload({
    useTempFiles: !process.env.AWS_S3_BUCKET,
  })
);
/// configure allowed file upload types and max file size
app.use(express.raw({ type: ['image/*'], limit: '10mb' }));
/// support json content body
app.use(express.json());
/// support standard form urlencoded body
app.use(express.urlencoded({ extended: false }));
/// support forwarded headers from intermediate proxies
app.set('trust proxy', 1);
/// set up session handling in cookies
app.use(
  cookieSession({
    secret: process.env.SESSION_SECRET,
    secure: process.env.NODE_ENV === 'production',
  })
);
/// use passport for authentication
app.use(passport.initialize());
app.use(passport.session());
/// support internationalization of strings
i18n.configure({
  locales: ['en'],
  directory: path.join(__dirname, 'locales'),
});
app.use(i18n.init);
/// set up local variables commonly used in all requests
app.use((req, res, next) => {
  /// set the current logged in user, if any
  res.locals.currentUser = req.user;
  next();
});

/// load in all the configured routes in /routes/index.js
app.use(routes);

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

/// error handler
app.use((err, req, res) => {
  /// render the error
  res.status(HttpStatus.INTERNAL_SERVER_ERROR).json(err);
});

module.exports = app;