app.js

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

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

require('dotenv').config();

var app = express();

app.use(helmet());
const mongo = require('mongodb')
const mongoose = require('mongoose')
const MONGODB_URI = process.env.MONGODB_URI
mongoose.connect(MONGODB_URI, { useNewUrlParser: true, useUnifiedTopology: true })
let db = mongoose.connection
db.on('error', console.error.bind(console, 'MongoDB connection error:'));
// console.log(db)

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

// app.use();
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);
app.use('/courses/api', coursesRouter);

// 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');
  res.json({error: res.locals.message})
});

module.exports = app;