class Rss

class Rss extends RssPluginBase {
    
    /**
     * The table the aggregator item is using for storage.
     *
     * @var string
     */
    public $base_table = 'aggregator_item';
    
    /**
     * The actual field which is used to identify a aggregator item.
     *
     * @var string
     */
    public $base_field = 'iid';
    
    /**
     * {@inheritdoc}
     */
    protected $entityTypeId = 'aggregator_item';
    
    /**
     * {@inheritdoc}
     */
    public function render($row) {
        $entity = $row->_entity;
        $item = new \stdClass();
        foreach ($entity as $name => $field) {
            $item->{$name} = $field->value;
        }
        $item->elements = [
            [
                'key' => 'pubDate',
                // views_view_row_rss takes care about the escaping.
'value' => gmdate('r', $entity->timestamp->value),
            ],
            [
                'key' => 'dc:creator',
                // views_view_row_rss takes care about the escaping.
'value' => $entity->author->value,
            ],
            [
                'key' => 'guid',
                // views_view_row_rss takes care about the escaping.
'value' => $entity->guid->value,
                'attributes' => [
                    'isPermaLink' => 'false',
                ],
            ],
        ];
        $build = [
            '#theme' => $this->themeFunctions(),
            '#view' => $this->view,
            '#options' => $this->options,
            '#row' => $item,
        ];
        return $build;
    }

}