m.coffee

nodemailer = require 'nodemailer'
http = require 'http'
q = require 'q'

oldIp = ''

opt = {
  from: '___'
  pass: '___'
  to: '___'
  gap: 10 * 60 * 1000
}

# SMTP "pool":
smtpTransport = nodemailer.createTransport 'SMTP',
  service: 'GMail'
  auth:
    user: opt.from
    pass: opt.pass

getIp = (locator)->
  console.log 'getting ip'
  deferred = q.defer()
  locator = locator or 'http://ifconfig.me/ip'
  deferred = q.defer()
  http.get locator, (resp) ->
    resp.on 'data', (chunk) ->
      ip = '' + chunk
      if ip is oldIp
        deferred.reject 'same ip'
      else
        oldIp = ip
        deferred.resolve ip
  deferred.promise

getMail = (context) ->
  # options:
  mailOptions =
    from: opt.from
    to: opt.to
    subject: 'Hello from node'
    text: context

sendMail = ->
  setTimeout ->
    getIp().then (ip) ->
      console.log ip
      smtpTransport.sendMail getMail(ip), (err, resp) ->
        console.error err if err
        console.log resp unless err
    sendMail()
  , opt.gap # Send ip address every 10 mins

sendMail()