/**
* Gets a form submitted via #ajax during an Ajax callback.
*
* This will load a form from the form cache used during Ajax operations. It
* pulls the form info from the request body.
*
* @param \Symfony\Component\HttpFoundation\Request $request
* The current request object.
*
* @return \Drupal\system\FileAjaxForm
* A wrapper object containing the $form, $form_state, $form_id,
* $form_build_id and an initial list of Ajax $commands.
*
* @throws \Symfony\Component\HttpKernel\Exception\HttpExceptionInterface
*/
protected function getForm(Request $request)
{
$form_state = new FormState();
$form_build_id = $request->request->get('form_build_id');
// Get the form from the cache.
$form = $this->formBuilder->getCache($form_build_id, $form_state);
if (!$form) {
// If $form cannot be loaded from the cache, the form_build_id must be
// invalid, which means that someone performed a POST request onto
// system/ajax without actually viewing the concerned form in the browser.
// This is likely a hacking attempt as it never happens under normal
// circumstances.
$this->logger->warning('Invalid form POST data.');
throw new BadRequestHttpException();
}
// Since some of the submit handlers are run, redirects need to be disabled.
$form_state->disableRedirect();
// When a form is rebuilt after Ajax processing, its #build_id and #action
// should not change.
// @see \Drupal\Core\Form\FormBuilderInterface::rebuildForm()
$form_state->addRebuildInfo('copy', ['#build_id' => TRUE, '#action' => TRUE]);
// The form needs to be processed; prepare for that by setting a few
// internal variables.
$form_state->setUserInput($request->request->all());
$form_id = $form['#form_id'];
return new FileAjaxForm($form, $form_state, $form_id, $form['#build_id'], []);
}
/**
* Gets a form submitted via #ajax during an Ajax callback.
*
* This will load a form from the form cache used during Ajax operations. It
* pulls the form info from the request body.
*
* @param \Symfony\Component\HttpFoundation\Request $request
* The current request object.
*
* @return \Drupal\system\FileAjaxForm
* A wrapper object containing the $form, $form_state, $form_id,
* $form_build_id and an initial list of Ajax $commands.
*
* @throws \Symfony\Component\HttpKernel\Exception\HttpExceptionInterface
*/
protected function getForm(Request $request)
{
$form_state = new FormState();
$form_build_id = $request->request->get('form_build_id');
// Get the form from the cache.
$form = $this->formBuilder->getCache($form_build_id, $form_state);
if (!$form) {
// If $form cannot be loaded from the cache, the form_build_id must be
// invalid, which means that someone performed a POST request onto
// system/ajax without actually viewing the concerned form in the browser.
// This is likely a hacking attempt as it never happens under normal
// circumstances.
$this->logger->warning('Invalid form POST data.');
throw new BadRequestHttpException();
}
// When a page level cache is enabled, the form-build id might have been
// replaced from within \Drupal::formBuilder()->getCache(). If this is the
// case, it is also necessary to update it in the browser by issuing an
// appropriate Ajax command.
$commands = [];
if (isset($form['#build_id_old']) && $form['#build_id_old'] != $form['#build_id']) {
// If the form build ID has changed, issue an Ajax command to update it.
$commands[] = new UpdateBuildIdCommand($form['#build_id_old'], $form['#build_id']);
$form_build_id = $form['#build_id'];
}
// Since some of the submit handlers are run, redirects need to be disabled.
$form_state->disableRedirect();
// When a form is rebuilt after Ajax processing, its #build_id and #action
// should not change.
// @see \Drupal\Core\Form\FormBuilderInterface::rebuildForm()
$form_state->addRebuildInfo('copy', ['#build_id' => TRUE, '#action' => TRUE]);
// The form needs to be processed; prepare for that by setting a few
// internal variables.
$form_state->setUserInput($request->request->all());
$form_id = $form['#form_id'];
return new FileAjaxForm($form, $form_state, $form_id, $form_build_id, $commands);
}
/**
* {@inheritdoc}
*/
public function deleteCache($form_build_id)
{
$this->formCache->deleteCache($form_build_id);
}
/**
* {@inheritdoc}
*/
public function setCache($form_build_id, $form, FormStateInterface $form_state)
{
$this->formCache->setCache($form_build_id, $form, $form_state);
}