app.js

const express = require('express');
const app = express();
const bodyParser = require('body-parser');
const cors = require('cors');


const displayPageRoute = require('./api/displayPage');
const classifyRoute = require('./api/classification');
const logRoute = require('./api/logging');
const authentication = require('./api/authentication');
let passport = require('./config/passport');

    app.set('port', process.env.PORT || 3000);
    app.use(bodyParser.urlencoded({extended: true, limit: '25mb'}));
    app.use(bodyParser.json({limit: '25mb'}));

//Prevent CORS violation
    app.use(cors());

    app.use(express.static(__dirname + '/public')); // so all public files can be served
    app.use('/images/', express.static('./images')); // so uploaded images can be served

    app.use('/classify', classifyRoute);
    app.use('/log', logRoute);
    app.use('/', displayPageRoute);
    app.use('/auth', authentication);

    app.use(passport.initialize());
//Error handling when url doesn't exist
    app.use((req, res, next) =>
    {
        const error = new Error('Not found');
        error.status = 404;
        next(error);
    });

//Error handling for thrown error
    app.use((error, req, res, next) =>
    {
        res.status(error.status || 500);
        res.json({
            error: {
                message: error.message
            }
        });
    });



module.exports = app;