app.js

// connects secret information (environment variables)
require('dotenv').config();
// import express
const express = require('express');
// import morgan
const morgan = require('morgan');
// import path module
const path = require('path');
// import method override to allow update and delete methods on forms
const methodOverride = require('method-override');
// import express session
const session = require('express-session');
// import passport
const passport = require('passport');
// point to routes in index.js file
const routes = require('./routes/index');
// create new express app and save it as 'app'
const app = express();
// server configuration -- define port
// use PORT in environment (.env) file, OR PORT 3000
const PORT = process.env.PORT || 3000;

// configure node.js to use ejs as views engine
app.set('view engine', 'ejs');

// use path module to point Node.js to public directory for images, styles, scripts
app.use(express.static(path.join(__dirname, 'public')));
// parse content encoded in the url
app.use(express.urlencoded({ extended: true }));
app.use(express.json());
// use method-override, key name (_method) tells module what to override
app.use(methodOverride('_method'));
// use morgan as middleware
app.use(morgan('dev'));

// tell app to utilize session (express-session)
app.use(session({
    secret: process.env.SECRET_KEY,
    resave: false,
    saveUninitialized: false
}));

// initialize passport
app.use(passport.initialize());
// allows passport to utilize session
app.use(passport.session());

// tells app that routes exist and where to find them
app.use(routes);


require('./config/connection');


// make server listen to requests on specified PORT and give feedback
app.listen(PORT, () => {
    console.log(`the server is listening, respectfully, on port ${PORT}`);
});