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Use *spec.SenderID for QuerySenderIDForUser (#3164)

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There are cases where a dendrite instance is unaware of a pseudo ID for
a user, the user is not a member of that room. To represent this case,
we currently use the 'zero' value, which is often not checked and so
causes errors later down the line. To make this case more explict, and
to be consistent with `QueryUserIDForSender`, this PR changes this to
use a pointer (and `nil` to mean no sender ID).

Signed-off-by: `Sam Wedgwood <sam@wedgwood.dev>`
This commit is contained in:
Sam Wedgwood 2023-08-02 11:12:14 +01:00 • committed by GitHub
parent af13fa1c75
commit c7193e24d0
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23 changed files with 129 additions and 65 deletions
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16
clientapi/routing/redaction.go
View file

@ -74,6 +74,16 @@ func SendRedaction(
return *resErr
}
// if user is member of room, and sender ID is nil, then this user doesn't have a pseudo ID for some reason,
// which is unexpected.
if senderID == nil {
util.GetLogger(req.Context()).WithField("userID", *deviceUserID).WithField("roomID", roomID).Error("missing sender ID for user, despite having membership")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.Unknown("internal server error"),
}
}
if txnID != nil {
// Try to fetch response from transactionsCache
if res, ok := txnCache.FetchTransaction(device.AccessToken, *txnID, req.URL); ok {
@ -98,7 +108,7 @@ func SendRedaction(
// "Users may redact their own events, and any user with a power level greater than or equal
// to the redact power level of the room may redact events there"
// https://matrix.org/docs/spec/client_server/r0.6.1#put-matrix-client-r0-rooms-roomid-redact-eventid-txnid
allowedToRedact := ev.SenderID() == senderID
allowedToRedact := ev.SenderID() == *senderID
if !allowedToRedact {
plEvent := roomserverAPI.GetStateEvent(req.Context(), rsAPI, roomID, gomatrixserverlib.StateKeyTuple{
EventType: spec.MRoomPowerLevels,
@ -119,7 +129,7 @@ func SendRedaction(
),
}
}
allowedToRedact = pl.UserLevel(senderID) >= pl.Redact
allowedToRedact = pl.UserLevel(*senderID) >= pl.Redact
}
if !allowedToRedact {
return util.JSONResponse{
@ -136,7 +146,7 @@ func SendRedaction(
// create the new event and set all the fields we can
proto := gomatrixserverlib.ProtoEvent{
SenderID: string(senderID),
SenderID: string(*senderID),
RoomID: roomID,
Type: spec.MRoomRedaction,
Redacts: eventID,