Email-confirmation Email Tutorial

app.js1

app.post('/login', function(req,res) {
    console.log('user email: ', req.body.email);

    res.render('index', {title: 'Sent authentication email'});
});

app.get('/verify_email', function(req,res) {
    console.log('verify_email token: ',req.query.token);

    res.render('index', {title: 'Authenticating...'});
});

app.js2

var mongoose = require('mongoose');

var dburi = 
    process.env.MONGOLAB_URI || 
    process.env.MONGOHQ_URL || 
    'mongodb://localhost/node-emailauth';

mongoose.connect(dburi, function (err, res) {
    if (err) { 
        console.log ('ERROR connecting to: ' + dburi + '. ' + err);
    } else {
        console.log ('Succeeded connected to: ' + dburi);
    }
});

app.js3

var userSchema = new mongoose.Schema({
    email: { type: String, required:true, unique:true },
    authToken: { type: String, required:true, unique:true },
    isAuthenticated: { type: Boolean, required:true }
});

var User = mongoose.model('User', userSchema);

app.js4

app.post('/login', function(req,res) {
    console.log('user email: ', req.body.email);

    //generate authentication token
    var seed = crypto.randomBytes(20);
    var authToken = crypto.createHash('sha1').update(seed + req.body.email).digest('hex');

    var newUser = new User({
        email: req.body.email,
        authToken: authToken,
        isAuthenticated: false
    });

    newUser.save(function(err, newUser) {
        if (err) {
            return console.error(err);
        }
        console.dir(newUser);
    });

    res.render('index', {title: 'Sent authentication email'});
});

app.js5

var crypto = require('crypto');

app.js6

app.get('/verify_email', function(req,res) {
    console.log('verify_email token: ',req.query.token);

    User.findOne({ authToken: req.query.token }, function(err, user) {
        if (err) { return console.error(err); }
        console.dir(user);

        user.isAuthenticated = true;
        user.save(function (err) {
            if (err) return console.error(err);
            console.log('succesfully updated user');
            console.log(user);

            res.send(user);
        });
    });

    res.render('index', {title: 'Authenticating...'});
});

app.js7

var sendgrid = require('sendgrid’)(YOUR_SENDGRID_USERNAME, YOUR_SENDGRID_PASSWORD);

app.js8

var authenticationURL = 'http://localhost:3000/verify_email?token=' + newUser.authToken;
sendgrid.send({
    to:       newUser.email,
    from:     'youremail@example.com',
    subject:  'Confirm your email',
    html:     '<a target=_blank href=\"' + authenticationURL + '\">Confirm your email</a>'
    }, function(err, json) {
        if (err) { return console.error(err); }
    console.log(json);
});

app.js9

sendgrid.send({
    to:       user.email,
    from:     'youremail@example.com',
    subject:  'Email confirmed!',
    html:     'Awesome! We can now send you kick-ass emails'
    }, function(err, json) {
        if (err) { return console.error(err); }
    console.log(json);
});

index.jade

extends layout

block content
  h1 #{title}
  div.loginbox
    form(name="login", action="/login", method="post")
      input(type="email", name="email")
      input(type="submit", value="login")