app.js

var express = require('express');
var methodOverride = require('method-override');
// var sassMiddleware = require('node-sass-middleware');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
// ===BP: Require Knex and Objection database from config/db.js
var db = require('./db/config.js');

// ===BP: Flash messages
var session = require('express-session');
var flash = require('connect-flash');

// Load express app
var app = express();

// ENABLE CORS specificiation standard script from enable-cors https://enable-cors.org/server_expressjs.html
app.use(function (req, res, next) {
    res.setHeader("Access-Control-Allow-Origin", '*');
    res.setHeader('Access-Control-Allow-Methods', 'POST,GET,OPTIONS,PUT,DELETE');
    res.setHeader('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
    //intercepts OPTIONS method
    if ('OPTIONS' === req.method) {
        //respond with 200
        res.sendStatus(200)
    }
    else {
        //move on
        next();
    }
});

// ===BP: EXPRESS-HANDLEBARS
app.engine('hbs', require('express-handlebars')({
    extname: 'hbs',
    defaultLayout: 'layout',
    layoutsDir: __dirname + '/views/layouts/'
}));

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

// 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.json({type: 'application/vnd.api+json'}));
app.use(bodyParser.urlencoded({extended: false}));
app.use(cookieParser());

// ===BP: ADD METHOD OVERRIDE TO ALLOW FORMS TO SUBMIT DELETE AND PUT REQUESTS
app.use(methodOverride(function (req, res) {
    if (req.body && typeof req.body === 'object' && '_method' in req.body) {
        // look in urlencoded POST bodies and delete it
        var method = req.body._method
        delete req.body._method
        return method
    }
}));

// ===BP: NODE-SASS-MIDDLEWARE
// app.use(sassMiddleware({
//     src: path.join(__dirname, 'public'),
//     dest: path.join(__dirname, 'public'),
//     debug: true,
//     outputStyle: 'compressed'
// }));

app.use(express.static(path.join(__dirname, 'public')));

// ===BP: REQUIRE ROUTES
app.use(require('./routes/index.js'));
app.use('/api/33traps', require('./controllers/33traps.js'));
app.use('/api/generator', require('./controllers/generator.js'));
app.use('/api/bridgehr', require('./controllers/bridgehr.js'));

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