Feature: #103019 - ModifyRedirectUrlValidationResultEvent PSR-14 event

Description

This feature introduces the new PSR-14 event ModifyRedirectUrlValidationResultEvent in the felogin extension to provide developers the possibility and flexibility to implement custom validation for the redirect URL. This may be useful if TYPO3 frontend login acts as an SSO system or if users should be redirected to an external URL after login.

Example

<?php

namespace Vendor\MyExtension\EventListener;

use TYPO3\CMS\Core\Attribute\AsEventListener;
use TYPO3\CMS\FrontendLogin\Event\ModifyRedirectUrlValidationResultEvent;

class ValidateRedirectUrl
{
    #[AsEventListener('validate-custom-redirect-url')]
    public function __invoke(ModifyRedirectUrlValidationResultEvent $event): void
    {
        $parsedUrl = parse_url($event->getRedirectUrl());
        if ($parsedUrl['host'] === 'trusted-host-for-redirect.tld') {
            $event->setValidationResult(true);
        }
    }
}

Impact

Developers now have the possibility to modify the validation results for the redirect URL, allowing redirects to URLs not matching existing validation constraints.