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<?php
namespace Drupal\node\Plugin\views\row;
use Drupal\Core\Entity\EntityManagerInterface;
use Drupal\views\Plugin\views\row\RssPluginBase;
/**
* Plugin which performs a node_view on the resulting object
* and formats it as an RSS item.
*
* @ViewsRow(
* id = "node_rss",
* title = @Translation("Content"),
* help = @Translation("Display the content with standard node view."),
* theme = "views_view_row_rss",
* register_theme = FALSE,
* base = {"node_field_data"},
* display_types = {"feed"}
* )
*/
class Rss extends RssPluginBase {
// Basic properties that let the row style follow relationships.
public $base_table = 'node_field_data';
public $base_field = 'nid';
// Stores the nodes loaded with preRender.
public $nodes = [];
/**
* {@inheritdoc}
*/
protected $entityTypeId = 'node';
/**
* The node storage
*
* @var \Drupal\node\NodeStorageInterface
*/
protected $nodeStorage;
/**
* Constructs the Rss 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\Core\Entity\EntityManagerInterface $entity_manager
* The entity manager.
*/
public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityManagerInterface $entity_manager) {
parent::__construct($configuration, $plugin_id, $plugin_definition, $entity_manager);
$this->nodeStorage = $entity_manager->getStorage('node');
}
/**
* {@inheritdoc}
*/
public function buildOptionsForm_summary_options() {
$options = parent::buildOptionsForm_summary_options();
$options['title'] = $this->t('Title only');
$options['default'] = $this->t('Use site default RSS settings');
return $options;
}
public function summaryTitle() {
$options = $this->buildOptionsForm_summary_options();
return $options[$this->options['view_mode']];
}
public function preRender($values) {
$nids = [];
foreach ($values as $row) {
$nids[] = $row->{$this->field_alias};
}
if (!empty($nids)) {
$this->nodes = $this->nodeStorage->loadMultiple($nids);
}
}
public function render($row) {
global $base_url;
$nid = $row->{$this->field_alias};
if (!is_numeric($nid)) {
return;
}
$display_mode = $this->options['view_mode'];
if ($display_mode == 'default') {
$display_mode = \Drupal::config('system.rss')->get('items.view_mode');
}
// Load the specified node:
/** @var \Drupal\node\NodeInterface $node */
$node = $this->nodes[$nid];
if (empty($node)) {
return;
}
$node->link = $node->url('canonical', ['absolute' => TRUE]);
$node->rss_namespaces = [];
$node->rss_elements = [
[
'key' => 'pubDate',
'value' => gmdate('r', $node->getCreatedTime()),
],
[
'key' => 'dc:creator',
'value' => $node->getOwner()->getDisplayName(),
],
[
'key' => 'guid',
'value' => $node->id() . ' at ' . $base_url,
'attributes' => ['isPermaLink' => 'false'],
],
];
// The node gets built and modules add to or modify $node->rss_elements
// and $node->rss_namespaces.
$build_mode = $display_mode;
$build = node_view($node, $build_mode);
unset($build['#theme']);
if (!empty($node->rss_namespaces)) {
$this->view->style_plugin->namespaces = array_merge($this->view->style_plugin->namespaces, $node->rss_namespaces);
}
elseif (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;
}
$item = new \stdClass();
if ($display_mode != 'title') {
// We render node contents.
$item->description = $build;
}
$item->title = $node->label();
$item->link = $node->link;
// Provide a reference so that the render call in
// template_preprocess_views_view_row_rss() can still access it.
$item->elements = &$node->rss_elements;
$item->nid = $node->id();
$build = [
'#theme' => $this->themeFunctions(),
'#view' => $this->view,
'#options' => $this->options,
'#row' => $item,
];
return $build;
}
}