GenerateSitemap::run PHP Method

    public function run()
    {
        $log = new Stream('php://stdout');
        /** @var Config $config */
        $config = Di::getDefault()->getShared('config');
        $expireDate = new DateTime('now', new DateTimeZone('UTC'));
        $expireDate->modify('+1 day');
        $sitemap = new DOMDocument("1.0", "UTF-8");
        $sitemap->formatOutput = true;
        $urlset = $sitemap->createElement('urlset');
        $urlset->setAttribute('xmlns', 'http://www.sitemaps.org/schemas/sitemap/0.9');
        $urlset->setAttribute('xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
        $baseUrl = $config->get('site')->url;
        $url = $sitemap->createElement('url');
        $url->appendChild($sitemap->createElement('loc', $baseUrl));
        $url->appendChild($sitemap->createElement('changefreq', 'daily'));
        $url->appendChild($sitemap->createElement('priority', '1.0'));
        $urlset->appendChild($url);
        $karmaSql = 'number_views + ' . '((IF(votes_up IS NOT NULL, votes_up, 0) - IF(votes_down IS NOT NULL, votes_down, 0)) * 4) + ' . 'number_replies';
        $parametersPosts = ['conditions' => 'deleted != 1', 'columns' => "id, slug, modified_at, {$karmaSql} AS karma", 'order' => 'karma DESC'];
        $posts = Posts::find($parametersPosts);
        $parametersKarma = ['column' => $karmaSql, 'conditions' => 'deleted != 1'];
        $karma = Posts::maximum($parametersKarma);
        $modifiedAt = new DateTime('now', new DateTimeZone('UTC'));
        foreach ($posts as $post) {
            $modifiedAt->setTimestamp($post->modified_at);
            $postKarma = $post->karma / ($karma + 100);
            $url = $sitemap->createElement('url');
            $href = trim($baseUrl, '/') . '/discussion/' . $post->id . '/' . $post->slug;
            $url->appendChild($sitemap->createElement('loc', $href));
            $valuePriority = $postKarma > 0.7 ? sprintf("%0.1f", $postKarma) : sprintf("%0.1f", $postKarma + 0.25);
            $url->appendChild($sitemap->createElement('priority', $valuePriority));
            $url->appendChild($sitemap->createElement('lastmod', $modifiedAt->format('Y-m-d\\TH:i:s\\Z')));
            $urlset->appendChild($url);
        }
        $sitemap->appendChild($urlset);
        $adapter = new Local(dirname(dirname(__FILE__)) . '/public');
        $filesystem = new Filesystem($adapter);
        if ($filesystem->has('sitemap.xml')) {
            $result = $filesystem->update('sitemap.xml', $sitemap->saveXML() . PHP_EOL);
        } else {
            $result = $filesystem->write('sitemap.xml', $sitemap->saveXML() . PHP_EOL);
        }
        if ($result) {
            $log->info('The sitemap.xml was successfully updated');
        } else {
            $log->error('Failed to update the sitemap.xml file');
        }
    }

            $url = $sitemap->createElement('url');
            $href = trim($baseUrl, '/') . '/discussion/' . $post->id . '/' . $post->slug;
            $url->appendChild($sitemap->createElement('loc', $href));
            $valuePriority = $postKarma > 0.7 ? sprintf("%0.1f", $postKarma) : sprintf("%0.1f", $postKarma + 0.25);
            $url->appendChild($sitemap->createElement('priority', $valuePriority));
            $url->appendChild($sitemap->createElement('lastmod', $modifiedAt->format('Y-m-d\\TH:i:s\\Z')));
            $urlset->appendChild($url);
        }
        $sitemap->appendChild($urlset);
        $adapter = new Local(dirname(dirname(__FILE__)) . '/public');
        $filesystem = new Filesystem($adapter);
        if ($filesystem->has('sitemap.xml')) {
            $result = $filesystem->update('sitemap.xml', $sitemap->saveXML() . PHP_EOL);
        } else {
            $result = $filesystem->write('sitemap.xml', $sitemap->saveXML() . PHP_EOL);
        }
        if ($result) {
            $log->info('The sitemap.xml was successfully updated');
        } else {
            $log->error('Failed to update the sitemap.xml file');
        }
    }
}
try {
    $task = new GenerateSitemap();
    $task->run();
} catch (Exception $e) {
    fwrite(STDERR, 'ERROR: ' . $e->getMessage() . PHP_EOL);
    fwrite(STDERR, $e->getTraceAsString() . PHP_EOL);
    exit(1);
}