app.js

/*
* App file for Express.js. Imports the necessary libraries and routes requests
*/

// import Node.JS Environmental variables
require('dotenv').config();
const host = process.env.HOST || 'http://localhost';
const port = process.env.PORT || '3000';

// NPM Imports
var express = require('express');
var createError = require('createerror');
var cors = require('cors');
var whiskers = require('whiskers'); // Whiskers rendering engine
var path = require('path');

// Express Router Imports
const mapRouter = require("./routes/map");
const homeRouter = require('./routes/home');
const resourcesRouter = require('./routes/resources');

// Create express app
var app = express(); // needs to be set up with websockets

// allow requests to Amazon AWS
app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "X-Requested-With");
  next();
});

// allow CORS
app.use(cors());

// set view engine to just plain ol' html
app.use(express.static(__dirname + '/public'));

// set view engine to whiskers
app.engine('.html', whiskers.__express);
app.set('views', path.join(__dirname, '/public'));

// Connect the Express files to their respective Routers and Login Requirement functions
app.use('/', homeRouter);
app.use('/map', mapRouter);
app.use('/resources', resourcesRouter);

// 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');
});

// Start the server!!! 😁
app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`));

module.exports = app;