gmail-cli/src/util.js

const fetch = require('node-fetch')
const chalk = require('chalk')
const simpleParser = require('mailparser').simpleParser

const headers = token => ({
  Authorization: `Bearer ${token}`,
  'User-Agent': 'google-api-nodejs-client/0.10.0',
  host: 'www.googleapis.com',
  accept: 'application/json'
})

const deleteMessage = ({ id, accessToken }) => {
  const url = `https://www.googleapis.com/gmail/v1/users/me/messages/${id}/trash`
  return fetch(url, {
    method: 'POST',
    headers: headers(accessToken)
  })
}

const prettyPrint = (text) => {
  console.log(chalk.greenBright(text))
}

const parseMessage = (raw) => {
  const subject = raw.payload.headers.find(header => header.name === 'Subject').value
  const messageId = raw.payload.headers.find(header => header.name === 'Message-Id').value
  const sender = raw.payload.headers.find(header => header.name === 'From').value
  const to = raw.payload.headers.find(header => header.name === 'To').value

  return { subject, messageId, from: sender, to }
}

const quickMailParse = source => simpleParser(source)

const parseAndFormatMail = async (source) => {
  const mail = await simpleParser(source)
  mail.html = 'undefined'
  mail.textAsHtml = 'undefined'
  const lines = []
  for (let key in mail) {
    if (typeof mail[key] === 'string' && mail[key] !== 'undefined') {
      lines.push(`${chalk.green(`${key}: `)}${mail[key]}`)
    } else if (mail[key].hasOwnProperty('value')) {
      lines.push(`${chalk.green(`${key}: `)}${mail[key].value[0].address}`)
    }
  }
  return lines
}

const printHeader = (account, messages) => {
  console.log(chalk.bold(`Welcome ${account.emailAddress}!`))
  console.log(chalk.bold(`Total messages: ${account.messagesTotal}`))
  console.log(chalk.yellow(`Messages in view: ${messages.length}`))
}

module.exports = {
  deleteMessage,
  headers,
  prettyPrint,
  printHeader,
  parseMessage,
  quickMailParse,
  parseAndFormatMail
}