Ensure $atomns is always set in Protocol\Feed

- Address https://github.com/friendica/friendica/issues/13025#issuecomment-1537162173

diff --git a/src/Protocol/Feed.php b/src/Protocol/Feed.php
index 8c6b4c28d184300f1e897149bb82c46e291cb0f2..a43124c69199ff283e634fe8378e2ee00310ace9 100644 (file)
--- a/src/Protocol/Feed.php
+++ b/src/Protocol/Feed.php
@@ -103,7 +103,7 @@ class Feed
                $xpath->registerNamespace('poco', ActivityNamespace::POCO);
 
                $author = [];
-               $atomns = '';
+               $atomns = 'atom';
                $entries = null;
                $protocol = Conversation::PARCEL_UNKNOWN;
 
@@ -128,13 +128,12 @@ class Feed
                // Is it Atom?
                if ($xpath->query('/atom:feed')->length > 0) {
                        $protocol = Conversation::PARCEL_ATOM;
-                       $atomns = 'atom';
                } elseif ($xpath->query('/atom03:feed')->length > 0) {
                        $protocol = Conversation::PARCEL_ATOM03;
                        $atomns = 'atom03';
                }
 
-               if (!empty($atomns)) {
+               if (in_array($protocol, [Conversation::PARCEL_ATOM, Conversation::PARCEL_ATOM03])) {
                        $alternate = XML::getFirstAttributes($xpath, $atomns . ":link[@rel='alternate']");
                        if (is_object($alternate)) {
                                foreach ($alternate as $attribute) {
@@ -335,7 +334,7 @@ class Feed
                                                case 'text':
                                                        $body = $attribute->nodeValue;
                                                        break;
-       
+
                                                case 'htmlUrl':
                                                        $plink = $attribute->nodeValue;
                                                        break;
@@ -343,7 +342,7 @@ class Feed
                                                case 'xmlUrl':
                                                        $uri = $attribute->nodeValue;
                                                        break;
-       
+
                                                case 'type':
                                                        $isrss = $attribute->nodeValue == 'rss';
                                                        break;
@@ -506,7 +505,7 @@ class Feed
                                                        $attachment['type'] = Post\Media::DOCUMENT;
                                                }
                                                $attachments[] = $attachment;
-                                       }                               
+                                       }
                                }
                        }