function FormTestStorageForm::buildForm

Overrides FormInterface::buildForm

File

core/modules/system/tests/modules/form_test/src/Form/FormTestStorageForm.php, line 31

Class

FormTestStorageForm

A multistep form for testing the form storage.

Namespace

Code

public function buildForm(array $form, FormStateInterface $form_state) {
    if ($form_state->isRebuilding()) {
        $form_state->setUserInput([]);
    }
    // Initialize
    $storage = $form_state->getStorage();
    $session = $this->getRequest()
        ->getSession();
    if (empty($storage)) {
        $user_input = $form_state->getUserInput();
        if (empty($user_input)) {
            $session->set('constructions', 0);
        }
        // Put the initial thing into the storage
        $storage = [
            'thing' => [
                'title' => 'none',
                'value' => '',
            ],
        ];
        $form_state->setStorage($storage);
    }
    // Count how often the form is constructed.
    $counter = $session->get('constructions');
    $session->set('constructions', ++$counter);
    $this->messenger()
        ->addStatus("Form constructions: " . $counter);
    $form['title'] = [
        '#type' => 'textfield',
        '#title' => 'Title',
        '#default_value' => $storage['thing']['title'],
        '#required' => TRUE,
    ];
    $form['value'] = [
        '#type' => 'textfield',
        '#title' => 'Value',
        '#default_value' => $storage['thing']['value'],
        '#element_validate' => [
            '::elementValidateValueCached',
        ],
    ];
    $form['continue_button'] = [
        '#type' => 'button',
        '#value' => 'Reset',
    ];
    $form['continue_submit'] = [
        '#type' => 'submit',
        '#value' => 'Continue submit',
        '#submit' => [
            '::continueSubmitForm',
        ],
    ];
    $form['submit'] = [
        '#type' => 'submit',
        '#value' => 'Save',
    ];
    // @todo Remove this in https://www.drupal.org/node/2524408, because form
    //   cache immutability is no longer necessary, because we no longer cache
    //   forms during safe HTTP methods. In the meantime, because
    //   Drupal\system\Tests\Form still has test coverage for a poisoned form
    //   cache following a GET request, trick $form_state into caching the form
    //   to keep that test working until we either remove it or change it in
    //   that issue.
    if ($this->getRequest()
        ->get('immutable')) {
        $form_state->addBuildInfo('immutable', TRUE);
        if ($this->getRequest()
            ->get('cache') && $this->getRequest()
            ->isMethodCacheable()) {
            $form_state->setRequestMethod('FAKE');
            $form_state->setCached();
        }
    }
    return $form;
}