class AggregatorFeedBlock in Drupal 9

Same name and namespace in other branches

8 core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php \Drupal\aggregator\Plugin\Block\AggregatorFeedBlock

Provides an 'Aggregator feed' block with the latest items from the feed.

Plugin annotation


@Block(
  id = "aggregator_feed_block",
  admin_label = @Translation("Aggregator feed"),
  category = @Translation("Lists (Views)")
)

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\aggregator\Plugin\Block\AggregatorFeedBlock implements ContainerFactoryPluginInterface

Expanded class hierarchy of AggregatorFeedBlock

File

core/modules/aggregator/src/Plugin/Block/AggregatorFeedBlock.php, line 24

Namespace

Drupal\aggregator\Plugin\Block

View source

class AggregatorFeedBlock extends BlockBase implements ContainerFactoryPluginInterface {

  /**
   * The entity storage for feeds.
   *
   * @var \Drupal\aggregator\FeedStorageInterface
   */
  protected $feedStorage;

  /**
   * The entity storage for items.
   *
   * @var \Drupal\aggregator\ItemStorageInterface
   */
  protected $itemStorage;

  /**
   * Constructs an AggregatorFeedBlock object.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\aggregator\FeedStorageInterface $feed_storage
   *   The entity storage for feeds.
   * @param \Drupal\aggregator\ItemStorageInterface $item_storage
   *   The entity storage for feed items.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, FeedStorageInterface $feed_storage, ItemStorageInterface $item_storage) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->feedStorage = $feed_storage;
    $this->itemStorage = $item_storage;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container
      ->get('entity_type.manager')
      ->getStorage('aggregator_feed'), $container
      ->get('entity_type.manager')
      ->getStorage('aggregator_item'));
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {

    // By default, the block will contain 10 feed items.
    return [
      'block_count' => 10,
      'feed' => NULL,
    ];
  }

  /**
   * {@inheritdoc}
   */
  protected function blockAccess(AccountInterface $account) {

    // Only grant access to users with the 'access news feeds' permission.
    return AccessResult::allowedIfHasPermission($account, 'access news feeds');
  }

  /**
   * {@inheritdoc}
   */
  public function blockForm($form, FormStateInterface $form_state) {
    $feeds = $this->feedStorage
      ->loadMultiple();
    $options = [];
    foreach ($feeds as $feed) {
      $options[$feed
        ->id()] = $feed
        ->label();
    }
    $form['feed'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Select the feed that should be displayed'),
      '#default_value' => $this->configuration['feed'],
      '#options' => $options,
    ];
    $range = range(2, 20);
    $form['block_count'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Number of news items in block'),
      '#default_value' => $this->configuration['block_count'],
      '#options' => array_combine($range, $range),
    ];
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function blockSubmit($form, FormStateInterface $form_state) {
    $this->configuration['block_count'] = $form_state
      ->getValue('block_count');
    $this->configuration['feed'] = $form_state
      ->getValue('feed');
  }

  /**
   * {@inheritdoc}
   */
  public function build() {

    // Load the selected feed.
    if (!($feed = $this->feedStorage
      ->load($this->configuration['feed']))) {
      return [];
    }
    $result = $this->itemStorage
      ->getQuery()
      ->accessCheck(TRUE)
      ->condition('fid', $feed
      ->id())
      ->range(0, $this->configuration['block_count'])
      ->sort('timestamp', 'DESC')
      ->sort('iid', 'DESC')
      ->execute();
    if ($result) {

      // Only display the block if there are items to show.
      $items = $this->itemStorage
        ->loadMultiple($result);
      $build['list'] = [
        '#theme' => 'item_list',
        '#items' => [],
      ];
      foreach ($items as $item) {
        $build['list']['#items'][$item
          ->id()] = [
          '#type' => 'link',
          '#url' => $item
            ->toUrl(),
          '#title' => $item
            ->label(),
        ];
      }
      $build['more_link'] = [
        '#type' => 'more_link',
        '#url' => $feed
          ->toUrl(),
        '#attributes' => [
          'title' => $this
            ->t("View this feed's recent news."),
        ],
      ];
      return $build;
    }
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheTags() {
    $cache_tags = parent::getCacheTags();
    if ($feed = $this->feedStorage
      ->load($this->configuration['feed'])) {
      $cache_tags = Cache::mergeTags($cache_tags, $feed
        ->getCacheTags());
    }
    return $cache_tags;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AggregatorFeedBlock::$feedStorage	protected	property	The entity storage for feeds.
AggregatorFeedBlock::$itemStorage	protected	property	The entity storage for items.
AggregatorFeedBlock::blockAccess	protected	function	Indicates whether the block should be shown. Overrides BlockPluginTrait::blockAccess
AggregatorFeedBlock::blockForm	public	function	Overrides BlockPluginTrait::blockForm
AggregatorFeedBlock::blockSubmit	public	function	Overrides BlockPluginTrait::blockSubmit
AggregatorFeedBlock::build	public	function	Builds and returns the renderable array for this block plugin. Overrides BlockPluginInterface::build
AggregatorFeedBlock::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create
AggregatorFeedBlock::defaultConfiguration	public	function	Overrides BlockPluginTrait::defaultConfiguration
AggregatorFeedBlock::getCacheTags	public	function	Overrides ContextAwarePluginTrait::getCacheTags
AggregatorFeedBlock::__construct	public	function	Constructs an AggregatorFeedBlock object. Overrides BlockPluginTrait::__construct
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::$transliteration	protected	property	The transliteration service.
BlockPluginTrait::access	public	function
BlockPluginTrait::baseConfigurationDefaults	protected	function	Returns generic default configuration for block plugins.
BlockPluginTrait::blockValidate	public	function		3
BlockPluginTrait::buildConfigurationForm	public	function	Creates a generic configuration form for all block types. Individual block plugins can add elements to this form by overriding BlockBase::blockForm(). Most block plugins should not override this method unless they need to alter the generic form elements. Aliased as: traitBuildConfigurationForm
BlockPluginTrait::calculateDependencies	public	function
BlockPluginTrait::getConfiguration	public	function		1
BlockPluginTrait::getMachineNameSuggestion	public	function		1
BlockPluginTrait::getPreviewFallbackString	public	function		3
BlockPluginTrait::label	public	function
BlockPluginTrait::setConfiguration	public	function
BlockPluginTrait::setConfigurationValue	public	function
BlockPluginTrait::setTransliteration	public	function	Sets the transliteration service.
BlockPluginTrait::submitConfigurationForm	public	function	Most block plugins should not override this method. To add submission handling for a specific block type, override BlockBase::blockSubmit().
BlockPluginTrait::transliteration	protected	function	Wraps the transliteration service.
BlockPluginTrait::validateConfigurationForm	public	function	Most block plugins should not override this method. To add validation for a specific block type, override BlockBase::blockValidate().	1
ContextAwarePluginAssignmentTrait::addContextAssignmentElement	protected	function	Builds a form element for assigning a context to a given slot.
ContextAwarePluginAssignmentTrait::contextHandler	protected	function	Wraps the context handler.
ContextAwarePluginTrait::$context	protected	property	The data objects representing the context of this plugin.
ContextAwarePluginTrait::$initializedContextConfig	protected	property	Tracks whether the context has been initialized from configuration.
ContextAwarePluginTrait::getCacheContexts	public	function		9
ContextAwarePluginTrait::getCacheMaxAge	public	function		7
ContextAwarePluginTrait::getContext	public	function
ContextAwarePluginTrait::getContextDefinition	public	function
ContextAwarePluginTrait::getContextDefinitions	public	function
ContextAwarePluginTrait::getContextMapping	public	function
ContextAwarePluginTrait::getContexts	public	function
ContextAwarePluginTrait::getContextValue	public	function
ContextAwarePluginTrait::getContextValues	public	function
ContextAwarePluginTrait::getPluginDefinition	abstract protected	function		1
ContextAwarePluginTrait::setContext	public	function		1
ContextAwarePluginTrait::setContextMapping	public	function
ContextAwarePluginTrait::setContextValue	public	function
ContextAwarePluginTrait::validateContexts	public	function
DependencySerializationTrait::$_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::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginWithFormsTrait::getFormClass	public	function	Implements \Drupal\Core\Plugin\PluginWithFormsInterface::getFormClass().
PluginWithFormsTrait::hasFormClass	public	function	Implements \Drupal\Core\Plugin\PluginWithFormsInterface::hasFormClass().
StringTranslationTrait::$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.

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class AggregatorFeedBlock in Drupal 9

Plugin annotation

Hierarchy

File

Namespace

Members

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