Transmit the Diaspora GUID with activities (Like, Dislike, ...)

src/Protocol/ActivityPub/Receiver.php

@@ -432,6 +432,10 @@ class Receiver
 			$object_data['updated'] = $activity['updated'];
 		}
 
+		if (!empty($activity['diaspora:guid']) && empty($object_data['diaspora:guid'])) {
+			$object_data['diaspora:guid'] = $activity['diaspora:guid'];
+		}
+
 		if (!empty($activity['inReplyTo']) && empty($object_data['parent-uri'])) {
 			$object_data['parent-uri'] = JsonLD::fetchElement($activity, 'inReplyTo', 'id');
 		}

src/Protocol/ActivityPub/Transmitter.php

@@ -554,6 +554,7 @@ class Transmitter
 		} elseif ($data['type'] == 'Undo') {
 			$data['object'] = self::createActivityFromItem($item_id, true);
 		} else {
+			$data['diaspora:guid'] = $item['guid'];
 			$data['object'] = $item['thr-parent'];
 		}