app.js

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var multer = require('multer');

var userRoutes = require('./routes/user');
var contentRoutes = require('./routes/content');
var appRoutes = require('./routes/app');

var app = express();

mongoose.connect('localhost:27017/node-angular');

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

// setting port
app.set('port', 3001);

// 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(function (req, res, next) {
    res.setHeader('Access-Control-Allow-Origin', 'http://localhost:3000');
    res.setHeader('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
    res.setHeader('Access-Control-Allow-Methods', 'POST, GET, PATCH, DELETE, OPTIONS');
    res.setHeader("Access-Control-Allow-Credentials", true);
    next();
});

var storage = multer.diskStorage({ //multers disk storage settings
    destination: function (req, file, cb) {
        cb(null, './public/uploads/');
    },
    filename: function (req, file, cb) {
        var datetimestamp = Date.now();
        cb(null, file.fieldname + '-' + datetimestamp + '.' + file.originalname.split('.')[file.originalname.split('.').length -1]);
    }
});

var upload = multer({ //multer settings
    storage: storage
}).single('file');

// API path that will upload the files
app.post('/upload', function(req, res) {
    upload(req,res,function(err){
        const file = req.file;
        if(err){
            res.json({error_code:1,err_desc:err});
            return;
        }
        res.json({
            message: "File Uploaded",
            obj: file
        });
    });
});

var server = app.listen(app.get('port'), function(){
    var port = server.address().port;
    console.log('running on port ' + port);
});

app.use('/user', userRoutes)
app.use('/content', contentRoutes);
app.use('/', appRoutes);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
    return res.render('index');
});


module.exports = app;