@srsl/tools/utils/email/index.js

JavaScript tools for common interfaces

const mjml2html = require('mjml')
const handlebars = require('handlebars')
const path = require('path')
const { promisify } = require('bluebird')

const sendgrid = require('../../constructors/sendgrid')
const { createVerificationCode } = require('../')


const readFile = promisify(require('fs').readFile)

const readEmailTemplate = (filepath) => {
  try {
    return readFile(path.resolve(__dirname, filepath), 'utf8')
  } catch (e) {
    console.log('Failed to read template from directory. ', e)
    return null
  }
}

const readHTMLEmailTemplate = filename => readEmailTemplate(`./templates/dist/${filename}.html`)
const readTextEmailTemplate = filename => readEmailTemplate(`./templates/dist/${filename}.txt`)

/*
 * sendStaticEmailWithName()
 * {param} templateName<String>
 * {param} subjectLine<String>
 *
 * Usage:
 * - ex: sendStaticEmailWithName('purchaseProcessing', { ToAddresses: ['user1@gmail.com'] }, 'noreply@trustedlife.com')
 *
 */
// module.exports.sendStaticEmailWithName = async function sendStaticEmailWithName(templateName, Destination, Source, subjectLine = 'Message from TrustedLife') {
//   const params = Object.assign({}, defaultStaticEmailParams, { Destination }, { Source })

//   params.Message.Body.Html.Data = await readHTMLEmailTemplate(templateName)
//   params.Message.Body.Text.Data = await readTextEmailTemplate(templateName)
//   params.Message.Subject.Data = subjectLine
//   console.log(params)
//   // ses.sendEmail(params).promise().then((data) => {
//   //   console.log(data.MessageId)
//   // }).catch((err) => {
//   //   console.error(err, err.stack)
//   // })
// }

// module.exports.send = async function send(template, dest, src, data = {}, subject = 'Message from TrustedLife') {
//   const params = Object.assign(
//     {},
//     defaultStaticEmailParams,
//     { Destination: dest },
//     { Source: src },
//   )

//   const mjmlTemplate = handlebars.compile(await readHTMLEmailTemplate(template))
//   const textTemplate = handlebars.compile(await readTextEmailTemplate(template))

//   const mjml = mjmlTemplate(data)
//   const { html } = mjml2html(mjml)
//   const text = textTemplate(data)

//   params.Message.Body.Html.Data = html
//   params.Message.Body.Text.Data = text
//   params.Message.Subject.Data = subject
//   console.log(params)
//   // ses.sendEmail(params).promise().then((resp) => {
//   //   console.log(resp.MessageId)
//   // }).catch((err) => {
//   //   console.error(err, err.stack)
//   // })
// }

/*
 * sendTemplatedEmailWithNameAndData()
 * {param} templateName<String>
 * {param} subjectLine<String>
 *
 * Usage:
 * * ex: sendTemplatedEmailWithNameAndData('purchaseConfirmed', { order: "Pioneer's Something or Other", price: 60000 }, { ToAddresses: ['user1@gmail.com'] }, 'noreply@trustedlife.com')
 *
 */
async function sendTemplatedEmailWithNameAndData(template, { subject, to, from }, data) {
  console.log('sendTemplatedEmailWithNameAndData', data)
  if (!data) {
    console.error('Parameter "data" is required.')
    return
  }
  try {
    const htmlTemplate = handlebars.compile(await readHTMLEmailTemplate(template))
    const textTemplate = handlebars.compile(await readTextEmailTemplate(template))
    const text = textTemplate(data)
    const html = htmlTemplate(data)
    // console.log('mjml', mjml)
    // const { html } = mjml2html(mjml)
    // console.log('html', html)

    const message = {
      to,
      from: (from || 'noreply@trustedlife.app'),
      subject,
      text,
      html,
    }
    console.log(`Sending email (${template}) to: ${to} from: ${message.from}`)
    return await sendgrid.send(message)
  } catch(err) {
    console.error(err)
  }
}

const sendEmailVerificationCode = async (to, from, subject = 'Verify your email') => {
  const CODE_LENGTH = 6
  const code = createVerificationCode(CODE_LENGTH)
  console.log('Verification email code: ', code)
  const emailresult = await sendTemplatedEmailWithNameAndData('validateEmail', { to, from, subject }, { code })
  console.log('emailresult: ', emailresult)
  return { code }
}

module.exports.sendTemplatedEmailWithNameAndData = sendTemplatedEmailWithNameAndData
module.exports.readHTMLEmailTemplate = readHTMLEmailTemplate
module.exports.readTextEmailTemplate = readTextEmailTemplate
module.exports.sendEmailVerificationCode = sendEmailVerificationCode