app.js

require('dotenv').config();

// inbuilt packages
const express = require('express');
const app = express();
const path = require('path');
// const PORT = process.env.PORT || 4000;    // abstracted to .www file

// creating variable object instances of - package dependencies 
const cookieParser = require('cookie-parser');
const cors = require('cors');
const corsOptions = require('../config/corsOptions');
const connectDB = require('../config/dbConnect');
const mongoose = require('mongoose');

// connect to database
console.log(process.env.NODE_ENV);
connectDB();

// mounting custom/inbuilt middleware on our app (order of code is IMP)
app.use(cors(corsOptions));
app.use(express.json());
app.use(cookieParser());

// static route 
app.use('/', express.static(path.join(__dirname, '/public')));
app.use('/', require('../routes/root'));

// test route - for /test
app.use('/test', require('../routes/testRoutes'));

// user route - for /api/users and /api/user
app.use('/api', require('../routes/userRoutes'));

// user route - for profiles 
app.use('/api/profiles', require('../routes/profileRoutes'));

// article routes
app.use('/api/articles', require('../routes/articlesRoutes'));

// tag routes
app.use('/api/tags', require('../routes/tagRoutes'))

// comment routes
app.use('/api/articles', require('../routes/commentRoutes'));

mongoose.connection.once('open', () =>{
    console.log("Connected to MongoDB");
    app.listen(PORT, ()=> {
        console.log(`Server running on port %{PORT}`);
    });
});

mongoose.connection.on('error', err =>{
    console.log(err);
});

module.exports = app;