app.js

const express = require('express');
const mongoose = require('mongoose');
const Blog = require('./models/blog');

// express app
const app = express();

// connect to mongodb & listen for requests
const dbURI='mongodb+srv://Mohamed:moha123456789@cluster0.tuz5z.mongodb.net/node-notes?retryWrites=true&w=majority'

mongoose.connect(dbURI, { useNewUrlParser: true, useUnifiedTopology: true })
  .then(result => app.listen(3000))
  .catch(err => console.log(err));

// register view engine
app.set('view engine', 'ejs');

// mongoose & mongo tests
app.get('/add-blog', (req, res) => {
  const blog = new Blog({
    author: 'Mohamed AbdelAziz Elahl',
    age: 25,
    email: 'mohamed.elahl@hotmail.com'
  })

  blog.save()
    .then(result => {
      res.send(result);
    })
    .catch(err => {
      console.log(err);
    });
});

app.get('/all-blogs', (req, res) => {
  Blog.find()
    .then(result => {
      res.send(result);
    })
    .catch(err => {
      console.log(err);
    });
});

app.get('/single-blog', (req, res) => {
  Blog.findById('6060aadf47ad4f2904a8e17f')
    .then(result => {
      res.send(result);
    })
    .catch(err => {
      console.log(err);
    });
});

app.get('/', (req, res) => {
  res.redirect('/blogs');
});

app.get('/about', (req, res) => {
  res.render('about', { title: 'About' });
});

// blog routes
app.get('/blogs/create', (req, res) => {
  res.render('create', { title: 'Create a new blog' });
});

app.get('/blogs', (req, res) => {
  Blog.find().sort({ createdAt: -1 })
    .then(result => {
      res.render('index', { blogs: result, title: 'All blogs' });
    })
    .catch(err => {
      console.log(err);
    });
});

// 404 page
app.use((req, res) => {
  res.status(404).render('404', { title: '404' });
});