+
+ static function getFeedAuthor($feedEl)
+ {
+ // Try the feed author
+
+ $author = ActivityUtils::child($feedEl, Activity::AUTHOR, Activity::ATOM);
+
+ if (!empty($author)) {
+ return new ActivityObject($author);
+ }
+
+ // Try old and deprecated activity:subject
+
+ $subject = ActivityUtils::child($feedEl, Activity::SUBJECT, Activity::SPEC);
+
+ if (!empty($subject)) {
+ return new ActivityObject($subject);
+ }
+
+ // Sheesh. Not a very nice feed! Let's try fingerpoken in the
+ // entries.
+
+ $entries = $feedEl->getElementsByTagNameNS(Activity::ATOM, 'entry');
+
+ if (!empty($entries) && $entries->length > 0) {
+
+ $entry = $entries->item(0);
+
+ // Try the author
+
+ $author = ActivityUtils::child($entry, Activity::AUTHOR, Activity::ATOM);
+
+ if (!empty($author)) {
+ return new ActivityObject($author);
+ }
+
+ // Try the (deprecated) activity:actor
+
+ $actor = ActivityUtils::child($entry, Activity::ACTOR, Activity::SPEC);
+
+ if (!empty($actor)) {
+ return new ActivityObject($actor);
+ }
+ }
+
+ return null;
+ }