protected function AutosaveFormBuilder::restoreAutosavedState in Autosave Form 8

Restores an autosaved form state.

Parameters

$form_id: The form id.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.

1 call to AutosaveFormBuilder::restoreAutosavedState()

AutosaveFormBuilder::rebuildForm in src/Form/AutosaveFormBuilder.php

Constructs a new $form from the information in $form_state.

File

src/Form/AutosaveFormBuilder.php, line 173

Class

AutosaveFormBuilder

Provides form building and processing with AutosaveForm enabled.

Namespace

Drupal\autosave_form\Form

Code

protected function restoreAutosavedState($form_id, FormStateInterface $form_state) {
  if (!$form_state
    ->get('autosave_form_restored') && ($autosaved_timestamp = $form_state
    ->get('autosave_form_state_timestamp'))) {
    $form_object = $form_state
      ->getFormObject();

    // Restore entity form.
    if ($form_object instanceof EntityFormInterface) {
      $entity = $form_object
        ->getEntity();
      $autosaved_state = $this->autosaveEntityFormStorage
        ->getEntityAndFormState($form_id, $entity
        ->getEntityTypeId(), $entity
        ->id(), $entity
        ->language()
        ->getId(), $this
        ->currentUser()
        ->id(), NULL, $autosaved_timestamp);
      if (is_null($autosaved_state)) {

        // @todo Cover the case that the autosaved state has been purged
        // meanwhile.
        return;
      }

      /** @var EntityInterface $autosaved_entity */
      $autosaved_entity = $autosaved_state['entity'];

      /** @var FormStateInterface $autosaved_form_state */
      $autosaved_form_state = $autosaved_state['form_state'];

      // Restore the form with the entity from the autosaved state.
      $form_object
        ->setEntity($autosaved_entity);

      // Restore the user input.
      $current_user_input = $form_state
        ->getUserInput();
      $autosaved_user_input = $autosaved_form_state
        ->getUserInput();

      // We have to rebuild the form and keep the generated form token
      // instead of putting the one from the autosaved input, otherwise the
      // form builder will set an form state error and, which is going to
      // result into an exception, as setting form state errors after the
      // validation phase is forbidden.
      if (isset($current_user_input['form_token'])) {
        $autosaved_user_input['form_token'] = $current_user_input['form_token'];
      }
      $form_state
        ->setUserInput($autosaved_user_input);

      // Recover the form state storage, which is needed to continue from the
      // state at which the form was left.
      $form_state
        ->setStorage($autosaved_form_state
        ->getStorage());

      // Flag the form state as being restored from autosave.
      $form_state
        ->set('autosave_form_restored', TRUE);
    }
    elseif ($form_object instanceof FormInterface) {

      // @todo add support for regular forms.
    }
  }
}