Lack of interest FormAction setup code event listener

[021]

.in order to extend the fields for saving, you need to extend a controller. For example:

class UserUpgrade extends XFCP_UserUpgrade
{
    protected function upgradeSaveProcess(\XF\Entity\UserUpgrade $upgrade)
    {
        $form = parent::upgradeSaveProcess($upgrade);

        $form->setupEntityInput($upgrade, $this->filter([
            'field' => 'uint'
        ]));

        return $form;
    }
}

I propose to add an event for this in FormAction:

....
foreach ($this->setup AS $setup)
{
    $setup($this);
    $this->fireSetup($setup);
}
$this->doneSetup();
....

Fire setup code

protected $setupFired = [];

protected function fireSetup(\Closure $setup)
{
    $funcVariables = (new \ReflectionFunction($setup))->getStaticVariables();

    $entities = array_filter($funcVariables, fn($v) => $v instanceof \XF\Mvc\Entity\Entity);

    $app = \XF::app();
    $request = $app->request();
    $controllerAction = $app->router()->getControllerAction(); // must return "XF\Admin\Controller\Example@action" | "XF\Pub\Controller\Example@action"

    /** @var \XF\Mvc\Entity\Entity $entity */
    foreach ($entities as $entity) {
        $hint = $this->setupHint($entity, $controllerAction);
        if (isset($this->setupFired[$hint])) {
            continue;
        }

        \XF::fire('form_action_setup', [$this, $entity, $request], $hint);
        $this->setupFired[$hint] = true;
    }
}

protected function setupHint(\XF\Mvc\Entity\Entity $entity, $controllerAction)
{
    $rootClass = \XF::extension()->resolveExtendedClassToRoot($entity);
    return $controllerAction.':'.$rootClass;
}

protected function doneSetup()
{
    $this->setupFired = [];
}

Hint will be like this: XF\Admin\Controller\UserUpgrade@save:XF\Entity\UserUpgrade
Arguments: \XF\Mvc\FormAction $form, \XF\Mvc\Entity\Entity $entity, \XF\Http\Request $request