If "Link" does not exist, then set it based on "guid" (PublicId.php)

CHANGELOG.md

@@ -0,0 +1,15 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Changed
+- Add logic to set the node's link from the <guid> element when isPermaLink="true" and no link is present. (#12)
+
+
+### Fixed
+

src/FeedIo/Rule/PublicId.php

@@ -18,6 +18,11 @@ class PublicId extends RuleAbstract
     public function setProperty(NodeInterface $node, \DOMElement $element): void
     {
         $node->setPublicId($element->nodeValue);
+        if ($element->nodeName === 'guid'
+        && $element->getAttribute('isPermaLink') === 'true'
+        && is_null($node->getLink())) {
+            $node->setLink($element->nodeValue);
+        }
     }
 
     /**