app.js

'use strict';

/**
 * Contains express application configurations.
 */
if (!process.env.NODE_ENV) {
  process.env.NODE_ENV = 'development';
}

const cors = require('cors');
const config = require('config');
const express = require('express');

const app = express();
const morgan = require('morgan');
const bodyParser = require('body-parser');
const _ = require('lodash');
const logger = require('./common/logger');

const { port } = config;

app.use(cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(morgan('dev'));

require('./app-routes')(app);

// The error handler,log error and return 500 error
// eslint-disable-next-line no-unused-vars
app.use((err, req, res, next) => {
  logger.logFullError(err, req.signature || `${req.method} ${req.url}`);
  const errorResponse = {};
  const status = err.isJoi ? 400 : err.httpStatus || 500;

  if (_.isArray(err.details)) {
    errorResponse.fields = _.map(err.details, 'path').join(', ');
    if (err.isJoi) {
      _.map(err.details, (e) => {
        if (e.message) {
          if (_.isUndefined(errorResponse.message)) {
            errorResponse.message = e.message;
          } else {
            errorResponse.message += ', ' + e.message;
          }
        }
      });
    }
  }
  if (_.isUndefined(errorResponse.message)) {
    if (err.message) {
      errorResponse.message = err.message;
    } else {
      errorResponse.message = 'server error';
    }
  }

  errorResponse.code = status;
  res.status(status).json(errorResponse);
});

app.listen(port, '0.0.0.0');
logger.info(
  'Express server listening on port %d in %s mode',
  port,
  process.env.NODE_ENV
);

module.exports = app;