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Reflow forced federated joins

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Neil Alexander 2020-09-10 14:58:55 +01:00
parent d96780c376
commit 36862bc436
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1 changed files with 20 additions and 23 deletions
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27
roomserver/internal/perform/perform_join.go
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@ -183,33 +183,30 @@ func (r *Joiner) performJoinRoomByID(
return "", fmt.Errorf("eb.SetContent: %w", err)
}
// Work out if this should be a federated join. This will be true
// if our server isn't joined to this room already, or in response
// to an existing invite from a federated server. If it is then we
// avoid the situation where we might think we know about a room
// in the following section but don't know the latest state as all
// of our users have left.
// Force a federated join if we aren't in the room and we've been
// given some server names to try joining by.
serverInRoom, _ := helpers.IsServerCurrentlyInRoom(ctx, r.DB, r.ServerName, req.RoomIDOrAlias)
forceFederatedJoin := len(req.ServerNames) > 0 && !serverInRoom
// Force a federated join if we're dealing with a pending invite
// and we aren't in the room.
isInvitePending, inviteSender, _, err := helpers.IsInvitePending(ctx, r.DB, req.RoomIDOrAlias, req.UserID)
if !serverInRoom || (err == nil && isInvitePending) {
if err == nil && inviteSender != "" {
// Check if there's an invite pending.
if err == nil && isInvitePending {
forceFederatedJoin = true
_, inviterDomain, ierr := gomatrixserverlib.SplitID('@', inviteSender)
if ierr != nil {
return "", fmt.Errorf("gomatrixserverlib.SplitID: %w", err)
}
// Check that the domain isn't ours. If it's local then we don't
// need to do anything as our own copy of the room state will be
// up-to-date.
// If we were invited by someone from another server then we can
// assume they are in the room so we can join via them.
if inviterDomain != r.Cfg.Matrix.ServerName {
// Add the server of the person who invited us to the server list,
// as they should be a fairly good bet.
req.ServerNames = append(req.ServerNames, inviterDomain)
}
}
// Perform a federated room join.
// If we should do a forced federated join then do that.
if forceFederatedJoin {
return req.RoomIDOrAlias, r.performFederatedJoinRoomByID(ctx, req)
}