Lambda function: Modulus Webhook to Slack incoming webhook

index.js

var request = require('request');
var util = require('util');

var slackWebhookUrl = '<YOUR_SLACK_WEBHOOK_API_URL>';

exports.handler = function(event, context) {
  var data = convertModulusWebhook(event);
  var options = {
    method: 'post',
    body: data,
    json: true,
    url: slackWebhookUrl
  };
  request(options, context.done);
};

/*  convert a Modulus webhook into a slack webhook
 */
var convertModulusWebhook = function(webhook) {
  var data = webhook;
  var text = util.format('%s - %s', data.type, data.project.name);
  var resp = {};
  resp.attachments = [];
  var info = {
      'fallback': text,
      'pretext': text,
      'color': getStatusColor(data.type),
      'fields': []
    };
  info.fields.push(buildCrashAttachment(data));
  resp.attachments.push(info);
  return resp;
};

var buildCrashAttachment = function(data) {
  if (data.type === 'crash' && data.servo) {
    return {
      'title': 'Modulus Alert',
      'text': data.servo.log,
      'short': false
    };
  } else {
    return {
      'title': 'Modulus Alert',
      'text': data.project.name,
      'short': false
    };
  }
};

/*  returns a Slack color depending on the modulus event type. Crash should be red, deploy should be
 *  green, and everything else will be orange.
 */
var getStatusColor = function(eventType) {
  if (eventType === 'crash') {
    return 'danger';
  } else if (eventType === 'deploy') {
    return 'good';
  } else {
    return 'warning';
  }
};