Events: Check if submission saving was triggered by user sending the form?

[mandrasch]

Hi,

I'm currently learning more about the afterSubmission event (https://verbb.io/craft-plugins/formie/docs/developers/events#the-afterSubmission-event).

How can I check if this event was triggered by the frontend user submitting the form - and not by a backend user editing the submission data later?

ChatGPT recommended that one option is to perform an identity check?

Event::on(
    Submissions::class,
    Submissions::EVENT_AFTER_SUBMISSION,
    function (SubmissionEvent $event) {
        $submission = $event->submission;
        $currentUser = Craft::$app->getUser()->getIdentity();

        if ($currentUser && $currentUser->id == $submission->userId) {
            // The event was triggered by the initial user
        }
    }
);

Is there another way to do this in a robust way?

Technical background: I trigger an API where I create a new record after the form is submitted. I want to avoid duplicates.

Thanks very much in advance! Regards, Matthias

[engram-design]

Checking whether someone is logged in or not isn't an effective way to check if it was a front-end request. One option is to use Craft::$app->getRequest->getIsSiteRequest() which will let you know if this is a request from the front-end.

But, the EVENT_AFTER_SUBMISSION isn't fired from saving a submission in the control panel. Formie has two paths when it comes to submissions. There's the formie/submissions/submit action endpoint that creates a new submission. formie/submissions/save-submission is for when editing it via the control panel.

So you're really safe to use EVENT_AFTER_SUBMISSION to enact on a form being submitted. This is what email notifications and integrations use to trigger events once a submission is "done".

[mandrasch]

Awesome! Thanks very much for the detailed answer! 🙏