Look at https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller to get an overview of what MVC is.
nodemyg/myg91/app.js
var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var indexRouter = require('./routes/index'); // activate Router/Controller
var usersRouter = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', indexRouter); // path to Router/Controller
app.use('/users', usersRouter);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});
// 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;
nodemyg/myg91/routers/index.js
const worldControllers = require("../controllers/worldControllers");
const express = require('express');
const router = express.Router();
/* GET home page. */
router.get('/', function(req, res, next) { // route
res.render('index', { title: 'Express' }); // direct response with view
});
router.get("/items/:vegetable", function(req, res, next) { // route
let veg = req.params.vegetable; // handling before
res.send(`This is the page for ${veg}`); // response
});
router.get('/contact', function(req, res, next) { // route
res.render('contact', { title: 'Express Contacts' }); // direct response with view
});
router.post("/contact", function(req, res, next) { // route
console.log(req.body); // handling before
res.send("This page will be handling contacts"); // response
});
/*
* A couple of extra routes as hints, not used in myg91
*/
router.get("/country/:country", function(req, res, next) { // route with country name
let country = worldControllers.retrieveCountry(req.params.country); // get data from
res.render("country", country);
});
router.get("/countryData", function(req, res, next) { // route to country form page
res.render("countryData", {});
});
router.post("/countryData", function(req, res, next) { // route with country data
worldControllers.insertCountry(req, res); // handling before
});
module.exports = router;