lambda sns slack notify function

slackNotify.js

var slackWebhookPath = '/services/T02N0QWAS/B2N58DH4N/lczo4THnmZvr2sNVMutCGH4P';
var https = require('https');
var util = require('util');
var colorMap = {
  'ALARM': 'danger',
  'OK': 'good',
  'INSUFFICIENT_DATA': 'warning'
};

exports.handler = function(event, context) {
  var postData = {
    'text': '*' + event.Records[0].Sns.Subject + '*'
  };

  var message = JSON.parse(event.Records[0].Sns.Message);
  var fields = [];

  Object.keys(message).forEach(function (key) {
    var value = message[key];

    if (typeof value === 'object') {
      value = JSON.stringify(value);
    }

    fields.push({
      'title': key,
      'value': value,
      'short': true
    });
  });

  // Grab the color given the Alarm state.
  // Default to 'danger'
  var color = colorMap[message.NewStateValue] || 'danger';

  postData.attachments = [{
    'color': color,
    'fields': fields
  }];

  var options = {
    method: 'POST',
    hostname: 'hooks.slack.com',
    port: 443,
    path: slackWebhookPath
  };

  var req = https.request(options, function(res) {
    res.setEncoding('utf8');
    res.on('data', function (chunk) {
      context.done(null);
    });
  });

  req.on('error', function(e) {
    console.log('problem with request: ' + e.message);
  });

  req.write(util.format('%j', postData));
  req.end();
};