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<?php
namespace ipl\Web\Common;
use ipl\Html\Contract\FormElement;
use ipl\Html\Form;
use LogicException;
trait RedirectOption
{
/**
* Create a form element to retrieve the redirect target upon form submit
*
* @return FormElement
*/
protected function createRedirectOption()
{
/** @var Form $this */
return $this->createElement('hidden', 'redirect');
}
/**
* @see Form::getRedirectUrl()
*/
public function getRedirectUrl()
{
/** @var Form $this */
$redirectOption = $this->getValue('redirect');
if (! $redirectOption) {
return parent::getRedirectUrl();
}
if (! $this->hasElement('CSRFToken') || ! $this->getElement('CSRFToken')->isValid()) {
throw new LogicException(
'It is not safe to accept redirect targets from submit values without CSRF protection'
);
}
return $redirectOption;
}
}
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