class UserLoginBlock in Drupal 9

Same name and namespace in other branches

8 core/modules/user/src/Plugin/Block/UserLoginBlock.php \Drupal\user\Plugin\Block\UserLoginBlock

Provides a 'User login' block.

Plugin annotation


@Block(
  id = "user_login_block",
  admin_label = @Translation("User login"),
  category = @Translation("Forms")
)

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\Core\Block\BlockBase implements BlockPluginInterface, ContextAwarePluginInterface, PluginWithFormsInterface, PreviewFallbackInterface uses BlockPluginTrait, ContextAwarePluginAssignmentTrait, ContextAwarePluginTrait
    class \Drupal\user\Plugin\Block\UserLoginBlock implements ContainerFactoryPluginInterface, TrustedCallbackInterface uses RedirectDestinationTrait

Expanded class hierarchy of UserLoginBlock

File

core/modules/user/src/Plugin/Block/UserLoginBlock.php, line 26

Namespace

Drupal\user\Plugin\Block

View source

class UserLoginBlock extends BlockBase implements ContainerFactoryPluginInterface, TrustedCallbackInterface {
  use RedirectDestinationTrait;

  /**
   * The route match.
   *
   * @var \Drupal\Core\Routing\RouteMatchInterface
   */
  protected $routeMatch;

  /**
   * Constructs a new UserLoginBlock instance.
   *
   * @param array $configuration
   *   The plugin configuration, i.e. an array with configuration values keyed
   *   by configuration option name. The special key 'context' may be used to
   *   initialize the defined contexts by setting it to an array of context
   *   values keyed by context names.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
   *   The route match.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, RouteMatchInterface $route_match) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->routeMatch = $route_match;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container
      ->get('current_route_match'));
  }

  /**
   * {@inheritdoc}
   */
  protected function blockAccess(AccountInterface $account) {
    $route_name = $this->routeMatch
      ->getRouteName();
    if ($account
      ->isAnonymous() && !in_array($route_name, [
      'user.login',
      'user.logout',
    ])) {
      return AccessResult::allowed()
        ->addCacheContexts([
        'route.name',
        'user.roles:anonymous',
      ]);
    }
    return AccessResult::forbidden();
  }

  /**
   * {@inheritdoc}
   */
  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,
      ],
    ];
  }

  /**
   * #lazy_builder callback; renders a form action URL including destination.
   *
   * @return array
   *   A renderable array representing the form action.
   *
   * @see \Drupal\Core\Form\FormBuilder::renderPlaceholderFormAction()
   */
  public static function renderPlaceholderFormAction() {
    return [
      '#type' => 'markup',
      '#markup' => UrlHelper::filterBadProtocol(Url::fromRoute('<current>', [], [
        'query' => \Drupal::destination()
          ->getAsArray(),
        'external' => FALSE,
      ])
        ->toString()),
      '#cache' => [
        'contexts' => [
          'url.path',
          'url.query_args',
        ],
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  public static function trustedCallbacks() {
    return [
      'renderPlaceholderFormAction',
    ];
  }

}

Members

Name	Modifiers	Type	Description	Overrides
BlockBase::buildConfigurationForm	public	function	Form constructor. Overrides PluginFormInterface::buildConfigurationForm	2
BlockPluginInterface::BLOCK_LABEL_VISIBLE		constant	Indicates the block label (title) should be displayed to end users.
BlockPluginTrait::$transliteration	protected	property	The transliteration service.
BlockPluginTrait::access	public	function
BlockPluginTrait::baseConfigurationDefaults	protected	function	Returns generic default configuration for block plugins.
BlockPluginTrait::blockForm	public	function		16
BlockPluginTrait::blockSubmit	public	function		13
BlockPluginTrait::blockValidate	public	function		3
BlockPluginTrait::buildConfigurationForm	public	function	Creates a generic configuration form for all block types. Individual block plugins can add elements to this form by overriding BlockBase::blockForm(). Most block plugins should not override this method unless they need to alter the generic form elements. Aliased as: traitBuildConfigurationForm
BlockPluginTrait::calculateDependencies	public	function
BlockPluginTrait::defaultConfiguration	public	function		19
BlockPluginTrait::getConfiguration	public	function		1
BlockPluginTrait::getMachineNameSuggestion	public	function		1
BlockPluginTrait::getPreviewFallbackString	public	function		3
BlockPluginTrait::label	public	function
BlockPluginTrait::setConfiguration	public	function
BlockPluginTrait::setConfigurationValue	public	function
BlockPluginTrait::setTransliteration	public	function	Sets the transliteration service.
BlockPluginTrait::submitConfigurationForm	public	function	Most block plugins should not override this method. To add submission handling for a specific block type, override BlockBase::blockSubmit().
BlockPluginTrait::transliteration	protected	function	Wraps the transliteration service.
BlockPluginTrait::validateConfigurationForm	public	function	Most block plugins should not override this method. To add validation for a specific block type, override BlockBase::blockValidate().	1
ContextAwarePluginAssignmentTrait::addContextAssignmentElement	protected	function	Builds a form element for assigning a context to a given slot.
ContextAwarePluginAssignmentTrait::contextHandler	protected	function	Wraps the context handler.
ContextAwarePluginTrait::$context	protected	property	The data objects representing the context of this plugin.
ContextAwarePluginTrait::$initializedContextConfig	protected	property	Tracks whether the context has been initialized from configuration.
ContextAwarePluginTrait::getCacheContexts	public	function		9
ContextAwarePluginTrait::getCacheMaxAge	public	function		7
ContextAwarePluginTrait::getCacheTags	public	function		4
ContextAwarePluginTrait::getContext	public	function
ContextAwarePluginTrait::getContextDefinition	public	function
ContextAwarePluginTrait::getContextDefinitions	public	function
ContextAwarePluginTrait::getContextMapping	public	function
ContextAwarePluginTrait::getContexts	public	function
ContextAwarePluginTrait::getContextValue	public	function
ContextAwarePluginTrait::getContextValues	public	function
ContextAwarePluginTrait::getPluginDefinition	abstract protected	function		1
ContextAwarePluginTrait::setContext	public	function		1
ContextAwarePluginTrait::setContextMapping	public	function
ContextAwarePluginTrait::setContextValue	public	function
ContextAwarePluginTrait::validateContexts	public	function
DependencySerializationTrait::$_entityStorages	protected	property
DependencySerializationTrait::$_serviceIds	protected	property
DependencySerializationTrait::__sleep	public	function		2
DependencySerializationTrait::__wakeup	public	function		2
MessengerTrait::$messenger	protected	property	The messenger.	27
MessengerTrait::messenger	public	function	Gets the messenger.	27
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginWithFormsTrait::getFormClass	public	function	Implements \Drupal\Core\Plugin\PluginWithFormsInterface::getFormClass().
PluginWithFormsTrait::hasFormClass	public	function	Implements \Drupal\Core\Plugin\PluginWithFormsInterface::hasFormClass().
RedirectDestinationTrait::$redirectDestination	protected	property	The redirect destination service.	1
RedirectDestinationTrait::getDestinationArray	protected	function	Prepares a 'destination' URL query parameter for use with \Drupal\Core\Url.
RedirectDestinationTrait::getRedirectDestination	protected	function	Returns the redirect destination service.
RedirectDestinationTrait::setRedirectDestination	public	function	Sets the redirect destination service.
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	4
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.
TrustedCallbackInterface::THROW_EXCEPTION		constant	Untrusted callbacks throw exceptions.
TrustedCallbackInterface::TRIGGER_SILENCED_DEPRECATION		constant	Untrusted callbacks trigger silenced E_USER_DEPRECATION errors.
TrustedCallbackInterface::TRIGGER_WARNING		constant	Untrusted callbacks trigger E_USER_WARNING errors.
UserLoginBlock::$routeMatch	protected	property	The route match.
UserLoginBlock::blockAccess	protected	function	Indicates whether the block should be shown. Overrides BlockPluginTrait::blockAccess
UserLoginBlock::build	public	function	Builds and returns the renderable array for this block plugin. Overrides BlockPluginInterface::build
UserLoginBlock::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create
UserLoginBlock::renderPlaceholderFormAction	public static	function	#lazy_builder callback; renders a form action URL including destination.
UserLoginBlock::trustedCallbacks	public static	function	Lists the trusted callbacks provided by the implementing class. Overrides TrustedCallbackInterface::trustedCallbacks
UserLoginBlock::__construct	public	function	Constructs a new UserLoginBlock instance. Overrides BlockPluginTrait::__construct

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class UserLoginBlock in Drupal 9

Plugin annotation

Hierarchy

File

Namespace

Members

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