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modules/mod_syndicate/src/Helper/SyndicateHelper.php

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+<?php
+
+/**
+ * @package     Joomla.Site
+ * @subpackage  mod_syndicate
+ *
+ * @copyright   (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Module\Syndicate\Site\Helper;
+
+use Joomla\CMS\Document\HtmlDocument;
+use Joomla\Registry\Registry;
+use Joomla\Utilities\ArrayHelper;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Helper for mod_syndicate
+ *
+ * @since  1.5
+ */
+class SyndicateHelper
+{
+    /**
+     * Gets the link
+     *
+     * @param   Registry      $params    The module parameters
+     * @param   HtmlDocument  $document  The document
+     *
+     * @return  string|null  The link as a string, if found
+     *
+     * @since   1.5
+     */
+    public static function getLink(Registry $params, HtmlDocument $document)
+    {
+        foreach ($document->_links as $link => $value) {
+            $value = ArrayHelper::toString($value);
+
+            if (strpos($value, 'application/' . $params->get('format') . '+xml')) {
+                return $link;
+            }
+        }
+
+        return null;
+    }
+}