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 mongoose = require('mongoose')
const fs = require('fs')
const join = require('path').join

const models = join(__dirname, 'models')

// Bootstrap models
fs.readdirSync(models)
  .filter(file => ~file.search(/^[^.].*\.js$/))
  .forEach(file => require(join(models, file)))

const indexRouter = require('./routes/index')
const articlesRouter = require('./routes/articles')
const csvRouter = require('./routes/csv')
const timeoutRouter = require('./routes/timeout')
const unicodeRouter = require('./routes/unicode')
const usersRouter = require('./routes/users')

const app = express()

// 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('/articles', articlesRouter)
app.use('/csv', csvRouter)
app.use('/timeout', timeoutRouter)
app.use('/unicode', unicodeRouter)
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')
})

// connect mongodb
// Set up default mongoose connection
mongoose.connect(process.env.MONGODB_URL, { useNewUrlParser: true, useUnifiedTopology: true })
// Get the default connection
const db = mongoose.connection
// Bind connection to error event (to get notification of connection errors)
db.on('error', console.error.bind(console, 'MongoDB connection error:'))
// Bind connection to open event once
db.once('open', () => console.log('MongoDB connection successful'))

module.exports = app