server.js

const App = require('./Core/App');
const app = new App();
const userRouter = require('./router')

const PORT = 5000;

const mw1 = (req, res, next) => {
    console.log('mw1')
    next()
}
const mw2 = (req, res, next) => {
    console.log('mw2')
    next()
}
const mw3 = (req, res, next) => {
    console.log('mw3')
    next()
}

// application level middleware
app.use(mw1, mw2, mw3)

// app.get(uri, controller)
app.get('/uri1', (req, res) => {res.json('uri1')})

// app.get(uri, middlewares, controller)
app.use('/uri2', mw3, mw2, mw1, (req, res) => {res.json('uri3')})

// app.use(uri, middlewares, router)
app.use('/user', mw3, mw2, mw1, userRouter)

// route parameters can be accessed by req.parans
app.get('/user/:id', (req, res) => {
    console.log(req.params.id)
    res.json('req.params')
})

app.listen(PORT, () => console.log('server is listening on', PORT));


// get: [
//     [ [Function: mw1], [Function: mw2], [Function: mw3] ],
//     { '/uri1': [Object] },   
//     { '/uri2': [Object] },
//     { '/user': [Object] }
//   ],