extract_handle.js

function extractHandle(data) {
    var sourceIsIntercomFriendly = data.contact.source === 'email' || data.contact.source === 'intercom';
    if (!data.contact || !sourceIsIntercomFriendly)
      return null;
    if (!/@mail.intercom.io/i.test(data.contact.handle))
      return data.contact.handle;
    // we need to go back to the messages to get the real intercom contact
    if (!data.conversation)
      return null;
    for (var i = 0; i < data.conversation.messages.length; i++) {
      var message = data.conversation.messages[i];
      for (var j = 0; i < message.recipients.length; i++) {
        var recipient = message.recipients[j];
        if (recipient.role === 'from' && recipient.handle === 'notifications@mail.intercom.io')
          return recipient.name;
      }
    }
    return null;
  }