Break Bot: pushing AWS IoT button events to Slack

handler.js

'use strict'

// for context, see https://twitter.com/jedschmidt/status/732244756491816960

const https = require('https')
const qs = require('querystring')

const WEBHOOK_PATH = '/services/YOUR_WEBHOOK_PATH_HERE'
const EVENTS_BY_CLICKTYPE = {
  SINGLE : {emoji: ':coffee:', type: 'beverages'},
  DOUBLE : {emoji: ':beer:', type: 'libations'},
  LONG   : {emoji: ':fork_and_knife:', type: 'food'}
}

exports.handler = function(data, context, cb) {
  let event = EVENTS_BY_CLICKTYPE[data.clickType]
  if (!event) return cb()

  let payload = JSON.stringify({
    channel: '#coffee-break',
    username: 'Break Bot',
    text: `Come on down to the kitchen, we're enjoying some ${event.type}!`,
    icon_emoji: event.emoji
  })

  let body = qs.stringify({payload})

  let options = {
    method: 'POST',
    host: 'hooks.slack.com',
    path: WEBHOOK_PATH,
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded',
      'Content-Length': Buffer.byteLength(body)
    }
  }

  https.request(options)
    .on('error', cb)
    .on('response', res => {
      res.setEncoding('utf8')
      res.on('data', msg => {
        res.statusCode == 200 ? cb(null, msg) : cb(msg)
      })
    })
    .end(body)
}