RssWidget.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Dashboard\Widgets;
 
use ‪TYPO3\CMS\Core\Cache\Frontend\FrontendInterface as Cache;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use ‪TYPO3\CMS\Fluid\View\StandaloneView;
 
class RssWidget implements WidgetInterface
{
    private $configuration;
 
    private $view;
 
    private $cache;
 
    private $options;
 
    private $buttonProvider;
 
    public function __construct(
        WidgetConfigurationInterface $configuration,
        Cache $cache,
        StandaloneView $view,
        $buttonProvider = null,
        array $options = []
    ) {
        $this->configuration = $configuration;
        $this->view = $view;
        $this->cache = $cache;
        $this->options = array_merge(
            [
                'limit' => 5,
                'lifeTime' => 43200,
            ],
            $options
        );
        $this->buttonProvider = $buttonProvider;
    }
 
    public function renderWidgetContent(): string
    {
        $this->view->setTemplate('Widget/RssWidget');
        $this->view->assignMultiple([
            'items' => $this->getRssItems(),
            'options' => $this->options,
            'button' => $this->buttonProvider,
            'configuration' => $this->configuration,
        ]);
        return $this->view->render();
    }
 
    protected function getRssItems(): array
    {
        if (empty($this->options['feedUrl'])) {
            return [];
        }
        $cacheHash = md5($this->options['feedUrl']);
        if ($items = $this->cache->get($cacheHash)) {
            return $items;
        }
 
        $rssContent = ‪GeneralUtility::getUrl($this->options['feedUrl']);
        if ($rssContent === false) {
            throw new \RuntimeException('RSS URL could not be fetched', 1573385431);
        }
        $previousValueOfEntityLoader = null;
        if (PHP_MAJOR_VERSION < 8) {
            $previousValueOfEntityLoader = libxml_disable_entity_loader(true);
        }
        $rssFeed = simplexml_load_string($rssContent);
        if (PHP_MAJOR_VERSION < 8) {
            libxml_disable_entity_loader($previousValueOfEntityLoader);
        }
        $items = [];
        foreach ($rssFeed->channel->item as $item) {
            $items[] = [
                'title' => trim((string)$item->title),
                'link' => trim((string)$item->link),
                'pubDate' => trim((string)$item->pubDate),
                'description' => trim(strip_tags((string)$item->description)),
            ];
        }
        usort($items, static function ($item1, $item2) {
            return new \DateTime($item2['pubDate']) <=> new \DateTime($item1['pubDate']);
        });
        $items = array_slice($items, 0, $this->options['limit']);
 
        $this->cache->set($cacheHash, $items, ['dashboard_rss'], $this->options['lifeTime']);
 
        return $items;
    }
 
    public function getOptions(): array
    {
        return $this->options;
    }
}