DefaultParser.php

<?php

namespace Drupal\aggregator\Plugin\aggregator\parser;

use Drupal\aggregator\Plugin\ParserInterface;
use Drupal\aggregator\FeedInterface;
use Drupal\Core\Messenger\MessengerTrait;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Laminas\Feed\Reader\Reader;
use Laminas\Feed\Reader\Exception\ExceptionInterface;

/**
 * Defines a default parser implementation.
 *
 * Parses RSS, Atom and RDF feeds.
 *
 * @AggregatorParser(
 *   id = "aggregator",
 *   title = @Translation("Default parser"),
 *   description = @Translation("Default parser for RSS, Atom and RDF feeds.")
 * )
 */
class DefaultParser implements ParserInterface {
    use StringTranslationTrait;
    use MessengerTrait;
    
    /**
     * {@inheritdoc}
     */
    public function parse(FeedInterface $feed) {
        // Set our bridge extension manager to Laminas Feed.
        Reader::setExtensionManager(\Drupal::service('feed.bridge.reader'));
        try {
            $channel = Reader::importString($feed->source_string);
        } catch (ExceptionInterface $e) {
            watchdog_exception('aggregator', $e);
            $this->messenger()
                ->addError($this->t('The feed from %site seems to be broken because of error "%error".', [
                '%site' => $feed->label(),
                '%error' => $e->getMessage(),
            ]));
            return FALSE;
        }
        $feed->setWebsiteUrl($channel->getLink());
        $feed->setDescription($channel->getDescription());
        if ($image = $channel->getImage()) {
            $feed->setImage($image['uri']);
        }
        // Initialize items array.
        $feed->items = [];
        foreach ($channel as $item) {
            // Reset the parsed item.
            $parsed_item = [];
            // Move the values to an array as expected by processors.
            $parsed_item['title'] = $item->getTitle();
            $parsed_item['guid'] = $item->getId();
            $parsed_item['link'] = $item->getLink();
            $parsed_item['description'] = $item->getDescription();
            $parsed_item['author'] = '';
            if ($author = $item->getAuthor()) {
                $parsed_item['author'] = $author['name'];
            }
            $parsed_item['timestamp'] = '';
            if ($date = $item->getDateModified()) {
                $parsed_item['timestamp'] = $date->getTimestamp();
            }
            // Store on $feed object. This is where processors will look for parsed items.
            $feed->items[] = $parsed_item;
        }
        return TRUE;
    }

}