Assistance with Webhook Extension

[wesleypearson]

Hello! Im attempting to write a general web hook for N8N to allow easy external processing,

It is showing in the logs its processing but Im not receiving any data.

Any help would be greatly appreciated.

function getScriptMetadata() {
    return {
        id: 'smsOnCheckIn',
        displayName: 'SMS on Check-In',
        version: 0,
        async: true,
        events: ['TICKET_CHECKED_IN']
    };
}

function cleansePhoneNumber(phoneNumber) {
    // Remove all non-digit characters
    var cleaned = phoneNumber.replace(/\D/g, '');

    // Check if it's an Australian mobile number
    if (cleaned.length === 10 && cleaned.startsWith('04')) {
        // Convert to international format
        cleaned = '+61' + cleaned.substring(2);
    }

    return cleaned;
}

function executeScript(scriptEvent) {
    if (!scriptEvent.ticket) {
        log.warn('No ticket found in script event');
        return;
    }

    var ticket = scriptEvent.ticket;
    
    if (!ticket.additionalInfo || !ticket.additionalInfo.phoneNumber) {
        log.warn('No phone number found for ticket ' + ticket.id);
        return;
    }

    var phoneNumber = cleansePhoneNumber(ticket.additionalInfo.phoneNumber);
    log.info('Sending data to webhook for phone number ' + phoneNumber);

    var message = "Hello, " + ticket.fullName + "! You have been successfully checked in.";

    // Send data to the webhook
    var webhookUrl = 'https://n8n.artefactgroup.au/webhook/cd445cd8-d9d6-4e57-bc95-0537aebebee6';
    var webhookData = {
        ticketId: ticket.id,
        phoneNumber: phoneNumber,
        message: message
    };
    var response = simpleHttpClient.post(webhookUrl, webhookData).asString();

    if (response.status >= 200 && response.status < 300) {
        log.info('Data successfully sent to webhook for phone number ' + phoneNumber);
    } else {
        log.error('Failed to send data to webhook: ' + response.body);
    }
}

[cbellone]

Hi @wesleypearson,
A couple of suggestions / remarks:

1. logging
the current implementation is logging only on the server log (i.e. /home/alfio/logs/alfio.log on your server), so you should check there.
If you want the logs to be visible on the backoffice "extension log" page, you should replace

• log.info(...) with console.log(...)
• log.warn(...) with console.warn(...)
• log.error(...) with console.error(...)

2. function parameters

your script is expecting scriptEvent to be an object. That's not the case. scriptEvent is a String representing the type of event that is being handled by your script in a given moment.
In your case it's always TICKET_CHECKED_IN, because your script is subscribed only to that extension event.

Additional objects (like ticket) can be found in the root scope. This means that you can reference the scope variable ticket directly, i.e.

function executeScript(scriptEvent) {
  if (!ticket.additionalInfo || !ticket.additionalInfo.phoneNumber) {
      log.warn('No phone number found for ticket ' + ticket.id);
      return;
  }
  [...]
}

3. scope object

as you can see in the documentation, https://alf.io/docs/reference/extensions/reference/ticket/#ticket-checked-in
ticket is the only scope variable available for the TICKET_CHECKED_IN event, so the following code:

  if (!ticket.additionalInfo || !ticket.additionalInfo.phoneNumber) {
      log.warn('No phone number found for ticket ' + ticket.id);
      return;
  }

will always print "No phone number found for ticket", because the Ticket object doesn't have that information.

Please open an issue and we'll try to add additionalInfo in the context of the TICKET_CHECKED_IN event

In the meantime, what you can do is:

1. Create another extension for the TICKET_ASSIGNED event, where you can access the additionalInfo scope variable
2. Persist the phoneNumber information somewhere outside of alf.io
3. modify your script to retrieve the phoneNumber information from your external storage