app.js

let express = require('express'),
    path = require('path'),
    cors = require('cors'),
    logger = require('morgan'),
    cookieParser = require('cookie-parser'),
    bodyParser = require('body-parser'),
    morgan = require('morgan'),
    mongoose = require('mongoose'),
    passport = require('passport'),
    config = require('./config/database');

require('./config/passport')(passport);
mongoose.connect(config.database, { useCreateIndex: true, useNewUrlParser: true, useUnifiedTopology: true });

let app = express();

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

app.use(cors());

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(morgan('dev'));
app.use(passport.initialize());


/**
 * Server Routes
 */

app.get('/', function(req, res) {
    res.send('Page under construction.');
});

// Calling routes
let authentication = require('./routes/auth');
let book = require('./routes/book');

// Using routes
app.use('/api', authentication);
app.use('/api', passport.authenticate('jwt', { session: false}), book);

/**
 * End Server Routes
 */


// catch 404 and forward to error handler
app.use(function(req, res, next) {
  let err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// 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');
});

module.exports = app;