sendMail.js

const fetch = require('isomorphic-unfetch')
const wait2Seconds = require('./wait2Seconds')

// usage
// sendMail({
//  to: 'p@tte.io',
//  fromEmail: 'jefferson@project-r.construction',
//  fromName: 'Jefferson',
//  subject: 'dear friend',
//  text: 'asdf asdf'
// })
module.exports = (mail) => {
  const {
    DEFAULT_MAIL_FROM_ADDRESS,
    DEFAULT_MAIL_FROM_NAME,
    NODE_ENV,
    SEND_MAILS,
    SEND_MAILS_DOMAIN_FILTER
  } = process.env

  // sanitize
  const message = Object.assign({}, mail, {
    to: [{email: mail.to}],
    from_email: mail.fromEmail || DEFAULT_MAIL_FROM_ADDRESS,
    from_name: mail.fromName || DEFAULT_MAIL_FROM_NAME,
    // will be purged by JSON.stringify
    fromName: undefined,
    fromEmail: undefined
  })

  // don't send in dev, expect SEND_MAILS is true
  // don't send mails if SEND_MAILS is false
  const DEV = NODE_ENV && NODE_ENV !== 'production'
  if (SEND_MAILS === 'false' || (DEV && SEND_MAILS !== 'true')) {
    console.log('\n\nSEND_MAIL prevented mail from being sent\n(SEND_MAIL == false or NODE_ENV != production and SEND_MAIL != true):\n', mail)
    return wait2Seconds()
  }

  if (SEND_MAILS_DOMAIN_FILTER) {
    const domain = mail.to.split('@')[1]
    if (domain !== SEND_MAILS_DOMAIN_FILTER) {
      console.log(`\n\nSEND_MAILS_DOMAIN_FILTER (${SEND_MAILS_DOMAIN_FILTER}) prevented mail from being sent:\n`, mail)
      return wait2Seconds()
    }
  }

  return fetch('https://mandrillapp.com/api/1.0/messages/send.json', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      key: process.env.MANDRILL_API_KEY,
      message
    })
  })
}