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<?php
namespace Drupal\Core\Form;
use Drupal\Component\Utility\UrlHelper;
use Drupal\Core\Url;
use Symfony\Component\HttpFoundation\Request;
/**
* Provides common functionality to confirmation forms.
*/
class ConfirmFormHelper {
/**
* Builds the cancel link for a confirmation form.
*
* @param \Drupal\Core\Form\ConfirmFormInterface $form
* The confirmation form.
* @param \Symfony\Component\HttpFoundation\Request $request
* The current request.
*
* @return array
* The link render array for the cancel form.
*/
public static function buildCancelLink(ConfirmFormInterface $form, Request $request) {
// Prepare cancel link.
$query = $request->query;
$url = NULL;
// If a destination is specified, that serves as the cancel link.
if ($query->has('destination')) {
$options = UrlHelper::parse($query->get('destination'));
// @todo Revisit this in https://www.drupal.org/node/2418219.
try {
$url = Url::fromUserInput('/' . ltrim($options['path'], '/'), $options);
}
catch (\InvalidArgumentException $e) {
// Suppress the exception and fall back to the form's cancel url.
}
}
// Check for a route-based cancel link.
if (!$url) {
$url = $form->getCancelUrl();
}
return [
'#type' => 'link',
'#title' => $form->getCancelText(),
'#attributes' => ['class' => ['button']],
'#url' => $url,
'#cache' => [
'contexts' => [
'url.query_args:destination',
],
],
];
}
}