function Rss::render

Overrides RowPluginBase::render

File

core/modules/node/src/Plugin/views/row/Rss.php, line 89

Class

Rss

Plugin which performs a node_view on the resulting object and formats it as an RSS item.

Namespace

Code

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->toUrl('canonical', [
        'absolute' => TRUE,
    ])
        ->toString();
    $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;
    $build = \Drupal::entityTypeManager()->getViewBuilder('node')
        ->view($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;
}