function UserLoginBlock::build

Overrides BlockPluginInterface::build

File

core/modules/user/src/Plugin/Block/UserLoginBlock.php, line 85

Class

UserLoginBlock

Provides a 'User login' block.

Namespace

Code

public function build() {
    $form = \Drupal::formBuilder()->getForm('Drupal\\user\\Form\\UserLoginForm');
    unset($form['name']['#attributes']['autofocus']);
    // When unsetting field descriptions, also unset aria-describedby attributes
    // to avoid introducing an accessibility bug.
    // @todo Do this automatically in https://www.drupal.org/node/2547063.
    unset($form['name']['#description']);
    unset($form['name']['#attributes']['aria-describedby']);
    unset($form['pass']['#description']);
    unset($form['pass']['#attributes']['aria-describedby']);
    $form['name']['#size'] = 15;
    $form['pass']['#size'] = 15;
    // Instead of setting an actual action URL, we set the placeholder, which
    // will be replaced at the very last moment. This ensures forms with
    // dynamically generated action URLs don't have poor cacheability.
    // Use the proper API to generate the placeholder, when we have one. See
    // https://www.drupal.org/node/2562341. The placeholder uses a fixed string
    // that is
    // Crypt::hashBase64('\Drupal\user\Plugin\Block\UserLoginBlock::build');
    // This is based on the implementation in
    // \Drupal\Core\Form\FormBuilder::prepareForm(), but the user login block
    // requires different behavior for the destination query argument.
    $placeholder = 'form_action_p_4r8ITd22yaUvXM6SzwrSe9rnQWe48hz9k1Sxto3pBvE';
    $form['#attached']['placeholders'][$placeholder] = [
        '#lazy_builder' => [
            '\\Drupal\\user\\Plugin\\Block\\UserLoginBlock::renderPlaceholderFormAction',
            [],
        ],
    ];
    $form['#action'] = $placeholder;
    // Build action links.
    $items = [];
    if (\Drupal::config('user.settings')->get('register') != UserInterface::REGISTER_ADMINISTRATORS_ONLY) {
        $items['create_account'] = [
            '#type' => 'link',
            '#title' => $this->t('Create new account'),
            '#url' => Url::fromRoute('user.register', [], [
                'attributes' => [
                    'title' => $this->t('Create a new user account.'),
                    'class' => [
                        'create-account-link',
                    ],
                ],
            ]),
        ];
    }
    $items['request_password'] = [
        '#type' => 'link',
        '#title' => $this->t('Reset your password'),
        '#url' => Url::fromRoute('user.pass', [], [
            'attributes' => [
                'title' => $this->t('Send password reset instructions via email.'),
                'class' => [
                    'request-password-link',
                ],
            ],
        ]),
    ];
    return [
        'user_login_form' => $form,
        'user_links' => [
            '#theme' => 'item_list',
            '#items' => $items,
        ],
    ];
}