fix(federation): Don't try to transfer membership in federated rooms

The host does not get notified and should not trust a server sending a
proxied invite for now.

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/Command/User/TransferOwnership.php

@@ -93,7 +93,7 @@ class TransferOwnership extends Base {
 		$includeNonModeratorRooms = $input->getOption('include-non-moderator');
 		$removeSourceUser = $input->getOption('remove-source-user');
 
-		$modified = 0;
+		$modified = $federatedRooms = 0;
 		$rooms = $this->manager->getRoomsForActor(Attendee::ACTOR_USERS, $sourceUID);
 		foreach ($rooms as $room) {
 			if ($room->getType() !== Room::TYPE_GROUP && $room->getType() !== Room::TYPE_PUBLIC) {
@@ -101,6 +101,11 @@ class TransferOwnership extends Base {
 				continue;
 			}
 
+			if ($room->isFederatedConversation()) {
+				$federatedRooms++;
+				continue;
+			}
+
 			$sourceParticipant = $this->participantService->getParticipantByActor($room, Attendee::ACTOR_USERS, $sourceUID);
 
 			if ($sourceParticipant->getAttendee()->getParticipantType() === Participant::USER_SELF_JOINED) {
@@ -141,6 +146,10 @@ class TransferOwnership extends Base {
 			}
 		}
 
+		if ($federatedRooms > 0) {
+			$output->writeln('<comment>Could not transfer membership in ' . $federatedRooms. ' federated rooms.</comment>');
+		}
+
 		$output->writeln('<info>Added or promoted user ' . $destinationUser->getUID() . ' in ' . $modified . ' rooms.</info>');
 		return 0;
 	}