middleware basics ☀️

index.js

const express = require('express');

const app = new express();

// middleware
const firstMiddleware = (req, res, next) => {
  // a return in the middleware
  // go to the next thing in the middleware chain
  console.log('in first middleware')
  next()
}

const secondMiddleware = (req, res, next) => {
  console.log('in second middleware')
  req.addingToTheRequest = "adding to the request"
  next()
}

const thirdMiddleware = (req, res, next) => {
  console.log(req.addingToTheRequest)
  next()
}

const onlyInRickAndMortyGet = (req, res, next) => {
  console.log('in the middleware for rick and morty get')
  next()
}

// global middleware
// app.use(express.json())
// app.use(express.urlencoded({extended: true}))
app.use(firstMiddleware)
app.use(secondMiddleware)

app.post('/rick-and-morty', thirdMiddleware, (req, res) => {
  console.log(req)
  // console.log(req.addingToTheRequest)
  res.send('hello')
})

// specific middleware, local middleware
app.get('/rick-and-morty-get', onlyInRickAndMortyGet, (req, res) => {
  res.send('in rick and morty get')
})

app.listen(3000, () => console.log('listening on port 3000'))