zapier function to take gmail input and determine inbox type

zapier.js

// a is the 'from name'
// b is the 'labels'
// you set these up in zapier after having gmail as a source

const slackURL = "https://hooks.slack.com/services/...";

let mb = inputData.b;
let folder = "Unknown";

if (mb.includes('CATEGORY_FORUMS')) {
  folder = "Inbox (Forums)";
}
if (mb.includes('CATEGORY_PERSONAL')) {
  folder = "Inbox (Personal)";
}
if (mb.includes('CATEGORY_UPDATES')) {
  folder = "Inbox (Updates)";
}
if (mb.includes('CATEGORY_SOCIAL')) {
  folder = "Inbox (Social)";
}
if (mb.includes('CATEGORY_PROMOTIONS')) {
  folder = "Inbox (Promotions)";
}
if (mb.includes('SPAM')) {
  folder = "SPAM FOLDER";
}

let message = inputData.a + " received in " + folder;
const slackData = { text: message, channel: '#whateverchannel' };
const res = await fetch(slackURL, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
    body: JSON.stringify(slackData)
  });

return {done: true};