app.js

const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const sassMiddleware = require('node-sass-middleware');
const helmet = require('helmet');
const compression = require('compression');
const zip = require('express-easy-zip');
const winston = require('./utils/logger');
const config = require('./config');

// Router definitions
const apiRouter = require('./api/router');
const appRouter = require('./app/router');

const app = express();

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

// Middlewares
app.use(zip());
app.use(helmet());
app.use(compression());
app.use(logger('dev', { stream: winston.stream }));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(sassMiddleware({
  src: path.join(__dirname, 'public'),
  dest: path.join(__dirname, 'public'),
  indentedSyntax: true, // true = .sass and false = .scss
  sourceMap: true
}));
app.use(express.static(path.join(__dirname, 'public')));

// Router constructs
app.use('/', appRouter);
app.use('/api/v1', apiRouter);

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

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

  winston.error(`${err.status || 500} - ${err.message} - ${req.originalUrl} - ${req.method} - ${req.ip}`);

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

module.exports = app;