class UserLoginBlock in Drupal 8

Same name and namespace in other branches

9 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\Component\Plugin\ContextAwarePluginBase implements ContextAwarePluginInterface
  - class \Drupal\Core\Plugin\ContextAwarePluginBase implements CacheableDependencyInterface, ContextAwarePluginInterface uses DependencySerializationTrait, StringTranslationTrait, TypedDataTrait
    class \Drupal\Core\Block\BlockBase implements BlockPluginInterface, PluginWithFormsInterface, PreviewFallbackInterface uses BlockPluginTrait, ContextAwarePluginAssignmentTrait
    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
BlockPluginInterface::BLOCK_LABEL_VISIBLE		constant	Indicates the block label (title) should be displayed to end users.
BlockPluginTrait::$transliteration	protected	property	The transliteration service.
BlockPluginTrait::access	public	function
BlockPluginTrait::baseConfigurationDefaults	protected	function	Returns generic default configuration for block plugins.
BlockPluginTrait::blockForm	public	function		16
BlockPluginTrait::blockSubmit	public	function		13
BlockPluginTrait::blockValidate	public	function		3
BlockPluginTrait::buildConfigurationForm	public	function	Creates a generic configuration form for all block types. Individual block plugins can add elements to this form by overriding BlockBase::blockForm(). Most block plugins should not override this method unless they need to alter the generic form elements.	2
BlockPluginTrait::calculateDependencies	public	function
BlockPluginTrait::defaultConfiguration	public	function		19
BlockPluginTrait::getConfiguration	public	function		1
BlockPluginTrait::getMachineNameSuggestion	public	function		1
BlockPluginTrait::getPreviewFallbackString	public	function		3
BlockPluginTrait::label	public	function
BlockPluginTrait::setConfiguration	public	function
BlockPluginTrait::setConfigurationValue	public	function
BlockPluginTrait::setTransliteration	public	function	Sets the transliteration service.
BlockPluginTrait::submitConfigurationForm	public	function	Most block plugins should not override this method. To add submission handling for a specific block type, override BlockBase::blockSubmit().
BlockPluginTrait::transliteration	protected	function	Wraps the transliteration service.
BlockPluginTrait::validateConfigurationForm	public	function	Most block plugins should not override this method. To add validation for a specific block type, override BlockBase::blockValidate().	1
ContextAwarePluginAssignmentTrait::addContextAssignmentElement	protected	function	Builds a form element for assigning a context to a given slot.
ContextAwarePluginAssignmentTrait::contextHandler	protected	function	Wraps the context handler.
ContextAwarePluginBase::$context	protected	property	The data objects representing the context of this plugin.
ContextAwarePluginBase::$contexts Deprecated	private	property	Data objects representing the contexts passed in the plugin configuration.
ContextAwarePluginBase::createContextFromConfiguration	protected	function	Overrides ContextAwarePluginBase::createContextFromConfiguration
ContextAwarePluginBase::getCacheContexts	public	function	The cache contexts associated with this object. Overrides CacheableDependencyInterface::getCacheContexts	9
ContextAwarePluginBase::getCacheMaxAge	public	function	The maximum age for which this object may be cached. Overrides CacheableDependencyInterface::getCacheMaxAge	7
ContextAwarePluginBase::getCacheTags	public	function	The cache tags associated with this object. Overrides CacheableDependencyInterface::getCacheTags	4
ContextAwarePluginBase::getContext	public	function	This code is identical to the Component in order to pick up a different Context class. Overrides ContextAwarePluginBase::getContext
ContextAwarePluginBase::getContextDefinition	public	function	Overrides ContextAwarePluginBase::getContextDefinition
ContextAwarePluginBase::getContextDefinitions	public	function	Overrides ContextAwarePluginBase::getContextDefinitions
ContextAwarePluginBase::getContextMapping	public	function	Gets a mapping of the expected assignment names to their context names. Overrides ContextAwarePluginInterface::getContextMapping
ContextAwarePluginBase::getContexts	public	function	Gets the defined contexts. Overrides ContextAwarePluginInterface::getContexts
ContextAwarePluginBase::getContextValue	public	function	Gets the value for a defined context. Overrides ContextAwarePluginInterface::getContextValue
ContextAwarePluginBase::getContextValues	public	function	Gets the values for all defined contexts. Overrides ContextAwarePluginInterface::getContextValues
ContextAwarePluginBase::setContext	public	function	Set a context on this plugin. Overrides ContextAwarePluginBase::setContext
ContextAwarePluginBase::setContextMapping	public	function	Sets a mapping of the expected assignment names to their context names. Overrides ContextAwarePluginInterface::setContextMapping
ContextAwarePluginBase::setContextValue	public	function	Sets the value for a defined context. Overrides ContextAwarePluginBase::setContextValue
ContextAwarePluginBase::validateContexts	public	function	Validates the set values for the defined contexts. Overrides ContextAwarePluginInterface::validateContexts
ContextAwarePluginBase::__get	public	function	Implements magic __get() method.
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
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::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginWithFormsTrait::getFormClass	public	function
PluginWithFormsTrait::hasFormClass	public	function
RedirectDestinationTrait::$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::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.
TrustedCallbackInterface::THROW_EXCEPTION		constant	Untrusted callbacks throw exceptions.
TrustedCallbackInterface::TRIGGER_SILENCED_DEPRECATION		constant	Untrusted callbacks trigger silenced E_USER_DEPRECATION errors.
TrustedCallbackInterface::TRIGGER_WARNING		constant	Untrusted callbacks trigger E_USER_WARNING errors.
TypedDataTrait::$typedDataManager	protected	property	The typed data manager used for creating the data types.
TypedDataTrait::getTypedDataManager	public	function	Gets the typed data manager.	2
TypedDataTrait::setTypedDataManager	public	function	Sets the typed data manager.	2
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 8

Plugin annotation

Hierarchy

File

Namespace

Members

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