class RssFields in Drupal 8

Same name and namespace in other branches

9 core/modules/views/src/Plugin/views/row/RssFields.php \Drupal\views\Plugin\views\row\RssFields
10 core/modules/views/src/Plugin/views/row/RssFields.php \Drupal\views\Plugin\views\row\RssFields

Renders an RSS item based on fields.

Plugin annotation


@ViewsRow(
  id = "rss_fields",
  title = @Translation("Fields"),
  help = @Translation("Display fields as RSS items."),
  theme = "views_view_row_rss",
  display_types = {"feed"}
)

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\views\Plugin\views\PluginBase implements DependentPluginInterface, ContainerFactoryPluginInterface, TrustedCallbackInterface, ViewsPluginInterface
    class \Drupal\views\Plugin\views\row\RowPluginBase
    class \Drupal\views\Plugin\views\row\RssFields

Expanded class hierarchy of RssFields

File

core/modules/views/src/Plugin/views/row/RssFields.php, line 19

Namespace

Drupal\views\Plugin\views\row

View source

class RssFields extends RowPluginBase {

  /**
   * Does the row plugin support to add fields to its output.
   *
   * @var bool
   */
  protected $usesFields = TRUE;
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['title_field'] = [
      'default' => '',
    ];
    $options['link_field'] = [
      'default' => '',
    ];
    $options['description_field'] = [
      'default' => '',
    ];
    $options['creator_field'] = [
      'default' => '',
    ];
    $options['date_field'] = [
      'default' => '',
    ];
    $options['guid_field_options']['contains']['guid_field'] = [
      'default' => '',
    ];
    $options['guid_field_options']['contains']['guid_field_is_permalink'] = [
      'default' => TRUE,
    ];
    return $options;
  }
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);
    $initial_labels = [
      '' => $this
        ->t('- None -'),
    ];
    $view_fields_labels = $this->displayHandler
      ->getFieldLabels();
    $view_fields_labels = array_merge($initial_labels, $view_fields_labels);
    $form['title_field'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Title field'),
      '#description' => $this
        ->t('The field that is going to be used as the RSS item title for each row.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['title_field'],
      '#required' => TRUE,
    ];
    $form['link_field'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Link field'),
      '#description' => $this
        ->t('The field that is going to be used as the RSS item link for each row. This must either be an internal unprocessed path like "node/123" or a processed, root-relative URL as produced by fields like "Link to content".'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['link_field'],
      '#required' => TRUE,
    ];
    $form['description_field'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Description field'),
      '#description' => $this
        ->t('The field that is going to be used as the RSS item description for each row.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['description_field'],
      '#required' => TRUE,
    ];
    $form['creator_field'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Creator field'),
      '#description' => $this
        ->t('The field that is going to be used as the RSS item creator for each row.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['creator_field'],
      '#required' => TRUE,
    ];
    $form['date_field'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Publication date field'),
      '#description' => $this
        ->t('The field that is going to be used as the RSS item pubDate for each row. It needs to be in RFC 2822 format.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['date_field'],
      '#required' => TRUE,
    ];
    $form['guid_field_options'] = [
      '#type' => 'details',
      '#title' => $this
        ->t('GUID settings'),
      '#open' => TRUE,
    ];
    $form['guid_field_options']['guid_field'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('GUID field'),
      '#description' => $this
        ->t('The globally unique identifier of the RSS item.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['guid_field_options']['guid_field'],
      '#required' => TRUE,
    ];
    $form['guid_field_options']['guid_field_is_permalink'] = [
      '#type' => 'checkbox',
      '#title' => $this
        ->t('GUID is permalink'),
      '#description' => $this
        ->t('The RSS item GUID is a permalink.'),
      '#default_value' => $this->options['guid_field_options']['guid_field_is_permalink'],
    ];
  }
  public function validate() {
    $errors = parent::validate();
    $required_options = [
      'title_field',
      'link_field',
      'description_field',
      'creator_field',
      'date_field',
    ];
    foreach ($required_options as $required_option) {
      if (empty($this->options[$required_option])) {
        $errors[] = $this
          ->t('Row style plugin requires specifying which views fields to use for RSS item.');
        break;
      }
    }

    // Once more for guid.
    if (empty($this->options['guid_field_options']['guid_field'])) {
      $errors[] = $this
        ->t('Row style plugin requires specifying which views fields to use for RSS item.');
    }
    return $errors;
  }
  public function render($row) {
    static $row_index;
    if (!isset($row_index)) {
      $row_index = 0;
    }
    if (function_exists('rdf_get_namespaces')) {

      // Merge RDF namespaces in the XML namespaces in case they are used
      // further in the RSS content.
      $xml_rdf_namespaces = [];
      foreach (rdf_get_namespaces() as $prefix => $uri) {
        $xml_rdf_namespaces['xmlns:' . $prefix] = $uri;
      }
      $this->view->style_plugin->namespaces += $xml_rdf_namespaces;
    }

    // Create the RSS item object.
    $item = new \stdClass();
    $item->title = $this
      ->getField($row_index, $this->options['title_field']);
    $item->link = $this
      ->getAbsoluteUrl($this
      ->getField($row_index, $this->options['link_field']));
    $field = $this
      ->getField($row_index, $this->options['description_field']);
    $item->description = is_array($field) ? $field : [
      '#markup' => $field,
    ];
    $item->elements = [
      [
        'key' => 'pubDate',
        'value' => $this
          ->getField($row_index, $this->options['date_field']),
      ],
      [
        'key' => 'dc:creator',
        'value' => $this
          ->getField($row_index, $this->options['creator_field']),
        'namespace' => [
          'xmlns:dc' => 'http://purl.org/dc/elements/1.1/',
        ],
      ],
    ];
    $guid_is_permalink_string = 'false';
    $item_guid = $this
      ->getField($row_index, $this->options['guid_field_options']['guid_field']);
    if ($this->options['guid_field_options']['guid_field_is_permalink']) {
      $guid_is_permalink_string = 'true';
      $item_guid = $this
        ->getAbsoluteUrl($item_guid);
    }
    $item->elements[] = [
      'key' => 'guid',
      'value' => $item_guid,
      'attributes' => [
        'isPermaLink' => $guid_is_permalink_string,
      ],
    ];
    $row_index++;
    foreach ($item->elements as $element) {
      if (isset($element['namespace'])) {
        $this->view->style_plugin->namespaces = array_merge($this->view->style_plugin->namespaces, $element['namespace']);
      }
    }
    $build = [
      '#theme' => $this
        ->themeFunctions(),
      '#view' => $this->view,
      '#options' => $this->options,
      '#row' => $item,
      '#field_alias' => isset($this->field_alias) ? $this->field_alias : '',
    ];
    return $build;
  }

  /**
   * Retrieves a views field value from the style plugin.
   *
   * @param $index
   *   The index count of the row as expected by views_plugin_style::getField().
   * @param $field_id
   *   The ID assigned to the required field in the display.
   *
   * @return string|null|\Drupal\Component\Render\MarkupInterface
   *   An empty string if there is no style plugin, or the field ID is empty.
   *   NULL if the field value is empty. If neither of these conditions apply,
   *   a MarkupInterface object containing the rendered field value.
   */
  public function getField($index, $field_id) {
    if (empty($this->view->style_plugin) || !is_object($this->view->style_plugin) || empty($field_id)) {
      return '';
    }
    return $this->view->style_plugin
      ->getField($index, $field_id);
  }

  /**
   * Convert a rendered URL string to an absolute URL.
   *
   * @param string $url_string
   *   The rendered field value ready for display in a normal view.
   *
   * @return string
   *   A string with an absolute URL.
   */
  protected function getAbsoluteUrl($url_string) {

    // If the given URL already starts with a leading slash, it's been processed
    // and we need to simply make it an absolute path by prepending the host.
    if (strpos($url_string, '/') === 0) {
      $host = \Drupal::request()
        ->getSchemeAndHttpHost();

      // @todo Views should expect and store a leading /.
      // @see https://www.drupal.org/node/2423913
      return $host . $url_string;
    }
    else {
      return Url::fromUserInput('/' . $url_string)
        ->setAbsolute()
        ->toString();
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
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::$definition	public	property	Plugins's definition
PluginBase::$displayHandler	public	property	The display object this plugin is for.
PluginBase::$options	public	property	Options for this plugin will be held here.
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::$renderer	protected	property	Stores the render API renderer.	3
PluginBase::$view	public	property	The top object of a view.	1
PluginBase::calculateDependencies	public	function	Calculates dependencies for the configured plugin. Overrides DependentPluginInterface::calculateDependencies	14
PluginBase::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create	62
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::destroy	public	function	Clears a plugin. Overrides ViewsPluginInterface::destroy	2
PluginBase::doFilterByDefinedOptions	protected	function	Do the work to filter out stored options depending on the defined options.
PluginBase::filterByDefinedOptions	public	function	Filter out stored options depending on the defined options. Overrides ViewsPluginInterface::filterByDefinedOptions
PluginBase::getAvailableGlobalTokens	public	function	Returns an array of available token replacements. Overrides ViewsPluginInterface::getAvailableGlobalTokens
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::getProvider	public	function	Returns the plugin provider. Overrides ViewsPluginInterface::getProvider
PluginBase::getRenderer	protected	function	Returns the render API renderer.	1
PluginBase::globalTokenForm	public	function	Adds elements for available core tokens to a form. Overrides ViewsPluginInterface::globalTokenForm
PluginBase::globalTokenReplace	public	function	Returns a string with any core tokens replaced. Overrides ViewsPluginInterface::globalTokenReplace
PluginBase::INCLUDE_ENTITY		constant	Include entity row languages when listing languages.
PluginBase::INCLUDE_NEGOTIATED		constant	Include negotiated languages when listing languages.
PluginBase::init	public	function	Initialize the plugin. Overrides ViewsPluginInterface::init	8
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::listLanguages	protected	function	Makes an array of languages, optionally including special languages.
PluginBase::pluginTitle	public	function	Return the human readable name of the display. Overrides ViewsPluginInterface::pluginTitle
PluginBase::preRenderAddFieldsetMarkup	public static	function	Moves form elements into fieldsets for presentation purposes. Overrides ViewsPluginInterface::preRenderAddFieldsetMarkup
PluginBase::preRenderFlattenData	public static	function	Flattens the structure of form elements. Overrides ViewsPluginInterface::preRenderFlattenData
PluginBase::queryLanguageSubstitutions	public static	function	Returns substitutions for Views queries for languages.
PluginBase::setOptionDefaults	protected	function	Fills up the options of the plugin with defaults.
PluginBase::summaryTitle	public	function	Returns the summary of the settings in the display. Overrides ViewsPluginInterface::summaryTitle	6
PluginBase::themeFunctions	public	function	Provide a full list of possible theme templates used by this style. Overrides ViewsPluginInterface::themeFunctions	1
PluginBase::trustedCallbacks	public static	function	Lists the trusted callbacks provided by the implementing class. Overrides TrustedCallbackInterface::trustedCallbacks	6
PluginBase::unpackOptions	public	function	Unpack options over our existing defaults, drilling down into arrays so that defaults don't get totally blown away. Overrides ViewsPluginInterface::unpackOptions
PluginBase::usesOptions	public	function	Returns the usesOptions property. Overrides ViewsPluginInterface::usesOptions	8
PluginBase::viewsTokenReplace	protected	function	Replaces Views' tokens in a given string. The resulting string will be sanitized with Xss::filterAdmin.	1
PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT		constant	Query string to indicate the site default language.
PluginBase::__construct	public	function	Constructs a PluginBase object. Overrides PluginBase::__construct
RowPluginBase::$usesOptions	protected	property	Denotes whether the plugin has an additional options form. Overrides PluginBase::$usesOptions	1
RowPluginBase::preRender	public	function	Allow the style to do stuff before each row is rendered.	4
RowPluginBase::query	public	function	Add anything to the query that we might need to. Overrides PluginBase::query	2
RowPluginBase::submitOptionsForm	public	function	Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data. Overrides PluginBase::submitOptionsForm	1
RowPluginBase::usesFields	public	function	Returns the usesFields property.	4
RowPluginBase::validateOptionsForm	public	function	Validate the options form. Overrides PluginBase::validateOptionsForm	1
RssFields::$usesFields	protected	property	Does the row plugin support to add fields to its output. Overrides RowPluginBase::$usesFields
RssFields::buildOptionsForm	public	function	Provide a form for setting options. Overrides RowPluginBase::buildOptionsForm
RssFields::defineOptions	protected	function	Information about options for all kinds of purposes will be held here. Overrides RowPluginBase::defineOptions
RssFields::getAbsoluteUrl	protected	function	Convert a rendered URL string to an absolute URL.
RssFields::getField	public	function	Retrieves a views field value from the style plugin.
RssFields::render	public	function	Render a row object. This usually passes through to a theme template of some form, but not always. Overrides RowPluginBase::render
RssFields::validate	public	function	Validate that the plugin is correct and can be saved. Overrides PluginBase::validate
StringTranslationTrait::$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.

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class RssFields in Drupal 8

Plugin annotation

Hierarchy

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Namespace

Members

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