freeCodeCamp/controllers/contact.js

var secrets = require('../config/secrets');
var sendgrid  = require('sendgrid')(secrets.sendgrid.user, secrets.sendgrid.password);

/**
 * GET /contact
 * Contact form page.
 */

exports.getContact = function(req, res) {
  res.render('contact', {
    title: 'Contact',
    success: req.flash('success'),
    errors: req.flash('errors')
  });
};

/**
 * POST /contact
 * Send a contact form via SendGrid.
 * @param {string} email
 * @param {string} name
 * @param {string} message
 */

exports.postContact = function(req, res) {
  req.assert('name', 'Name cannot be blank').notEmpty();
  req.assert('email', 'Email cannot be blank').notEmpty();
  req.assert('email', 'Email is not valid').isEmail();
  req.assert('message', 'Message cannot be blank').notEmpty();

  var errors = req.validationErrors();

  if (errors) {
    req.flash('errors', errors);
    return res.redirect('/contact');
  }

  var from = req.body.email;
  var name = req.body.name;
  var body = req.body.message;
  var to = 'you@email.com';
  var subject = 'API Example | Contact Form';

  var email = new sendgrid.Email({
    to: to,
    from: from,
    subject: subject,
    text: body + '\n\n' + name
  });

  sendgrid.send(email, function(err) {
    if (err) {
      req.flash('errors', { msg: err.message });
      return res.redirect('/contact');
    }
    req.flash('success', 'Email has been sent successfully!');
    res.redirect('/contact');
  });
};