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dendrite/roomserver/internal/query/query.go
Till 3c1474f68f
Fix /get_missing_events for rooms with joined/invited history_visibility (#2787)
Sytest was using a wrong `history_visibility` for `invited`
(https://github.com/matrix-org/sytest/pull/1303), so `invited` was
passing for the wrong reason (-> defaulted to `shared`, as `invite`
wasn't understood).
This change now handles missing events like Synapse, if a server isn't
allowed to see the event, it gets a redacted version of it, making the
`get_missing_events` tests pass.
2022-10-11 16:04:02 +02:00

959 lines
29 KiB
Go

// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package query
import (
"context"
"database/sql"
"encoding/json"
"errors"
"fmt"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/sirupsen/logrus"
"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
"github.com/matrix-org/dendrite/internal/caching"
"github.com/matrix-org/dendrite/roomserver/acls"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/internal/helpers"
"github.com/matrix-org/dendrite/roomserver/state"
"github.com/matrix-org/dendrite/roomserver/storage"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/dendrite/roomserver/version"
)
type Queryer struct {
DB storage.Database
Cache caching.RoomServerCaches
ServerName gomatrixserverlib.ServerName
ServerACLs *acls.ServerACLs
}
// QueryLatestEventsAndState implements api.RoomserverInternalAPI
func (r *Queryer) QueryLatestEventsAndState(
ctx context.Context,
request *api.QueryLatestEventsAndStateRequest,
response *api.QueryLatestEventsAndStateResponse,
) error {
return helpers.QueryLatestEventsAndState(ctx, r.DB, request, response)
}
// QueryStateAfterEvents implements api.RoomserverInternalAPI
func (r *Queryer) QueryStateAfterEvents(
ctx context.Context,
request *api.QueryStateAfterEventsRequest,
response *api.QueryStateAfterEventsResponse,
) error {
info, err := r.DB.RoomInfo(ctx, request.RoomID)
if err != nil {
return err
}
if info == nil || info.IsStub() {
return nil
}
roomState := state.NewStateResolution(r.DB, info)
response.RoomExists = true
response.RoomVersion = info.RoomVersion
prevStates, err := r.DB.StateAtEventIDs(ctx, request.PrevEventIDs)
if err != nil {
if _, ok := err.(types.MissingEventError); ok {
return nil
}
return err
}
response.PrevEventsExist = true
var stateEntries []types.StateEntry
if len(request.StateToFetch) == 0 {
// Look up all of the current room state.
stateEntries, err = roomState.LoadCombinedStateAfterEvents(
ctx, prevStates,
)
} else {
// Look up the current state for the requested tuples.
stateEntries, err = roomState.LoadStateAfterEventsForStringTuples(
ctx, prevStates, request.StateToFetch,
)
}
if err != nil {
if _, ok := err.(types.MissingEventError); ok {
return nil
}
if _, ok := err.(types.MissingStateError); ok {
return nil
}
return err
}
stateEvents, err := helpers.LoadStateEvents(ctx, r.DB, stateEntries)
if err != nil {
return err
}
if len(request.PrevEventIDs) > 1 {
var authEventIDs []string
for _, e := range stateEvents {
authEventIDs = append(authEventIDs, e.AuthEventIDs()...)
}
authEventIDs = util.UniqueStrings(authEventIDs)
authEvents, err := GetAuthChain(ctx, r.DB.EventsFromIDs, authEventIDs)
if err != nil {
return fmt.Errorf("getAuthChain: %w", err)
}
stateEvents, err = gomatrixserverlib.ResolveConflicts(info.RoomVersion, stateEvents, authEvents)
if err != nil {
return fmt.Errorf("state.ResolveConflictsAdhoc: %w", err)
}
}
for _, event := range stateEvents {
response.StateEvents = append(response.StateEvents, event.Headered(info.RoomVersion))
}
return nil
}
// QueryEventsByID implements api.RoomserverInternalAPI
func (r *Queryer) QueryEventsByID(
ctx context.Context,
request *api.QueryEventsByIDRequest,
response *api.QueryEventsByIDResponse,
) error {
eventNIDMap, err := r.DB.EventNIDs(ctx, request.EventIDs)
if err != nil {
return err
}
var eventNIDs []types.EventNID
for _, nid := range eventNIDMap {
eventNIDs = append(eventNIDs, nid)
}
events, err := helpers.LoadEvents(ctx, r.DB, eventNIDs)
if err != nil {
return err
}
for _, event := range events {
roomVersion, verr := r.roomVersion(event.RoomID())
if verr != nil {
return verr
}
response.Events = append(response.Events, event.Headered(roomVersion))
}
return nil
}
// QueryMembershipForUser implements api.RoomserverInternalAPI
func (r *Queryer) QueryMembershipForUser(
ctx context.Context,
request *api.QueryMembershipForUserRequest,
response *api.QueryMembershipForUserResponse,
) error {
info, err := r.DB.RoomInfo(ctx, request.RoomID)
if err != nil {
return err
}
if info == nil {
response.RoomExists = false
return nil
}
response.RoomExists = true
membershipEventNID, stillInRoom, isRoomforgotten, err := r.DB.GetMembership(ctx, info.RoomNID, request.UserID)
if err != nil {
return err
}
response.IsRoomForgotten = isRoomforgotten
if membershipEventNID == 0 {
response.HasBeenInRoom = false
return nil
}
response.IsInRoom = stillInRoom
response.HasBeenInRoom = true
evs, err := r.DB.Events(ctx, []types.EventNID{membershipEventNID})
if err != nil {
return err
}
if len(evs) != 1 {
return fmt.Errorf("failed to load membership event for event NID %d", membershipEventNID)
}
response.EventID = evs[0].EventID()
response.Membership, err = evs[0].Membership()
return err
}
// QueryMembershipAtEvent returns the known memberships at a given event.
// If the state before an event is not known, an empty list will be returned
// for that event instead.
func (r *Queryer) QueryMembershipAtEvent(
ctx context.Context,
request *api.QueryMembershipAtEventRequest,
response *api.QueryMembershipAtEventResponse,
) error {
response.Memberships = make(map[string][]*gomatrixserverlib.HeaderedEvent)
info, err := r.DB.RoomInfo(ctx, request.RoomID)
if err != nil {
return fmt.Errorf("unable to get roomInfo: %w", err)
}
if info == nil {
return fmt.Errorf("no roomInfo found")
}
// get the users stateKeyNID
stateKeyNIDs, err := r.DB.EventStateKeyNIDs(ctx, []string{request.UserID})
if err != nil {
return fmt.Errorf("unable to get stateKeyNIDs for %s: %w", request.UserID, err)
}
if _, ok := stateKeyNIDs[request.UserID]; !ok {
return fmt.Errorf("requested stateKeyNID for %s was not found", request.UserID)
}
stateEntries, err := helpers.MembershipAtEvent(ctx, r.DB, info, request.EventIDs, stateKeyNIDs[request.UserID])
if err != nil {
return fmt.Errorf("unable to get state before event: %w", err)
}
for _, eventID := range request.EventIDs {
stateEntry, ok := stateEntries[eventID]
if !ok {
response.Memberships[eventID] = []*gomatrixserverlib.HeaderedEvent{}
continue
}
memberships, err := helpers.GetMembershipsAtState(ctx, r.DB, stateEntry, false)
if err != nil {
return fmt.Errorf("unable to get memberships at state: %w", err)
}
res := make([]*gomatrixserverlib.HeaderedEvent, 0, len(memberships))
for i := range memberships {
ev := memberships[i]
if ev.Type() == gomatrixserverlib.MRoomMember && ev.StateKeyEquals(request.UserID) {
res = append(res, ev.Headered(info.RoomVersion))
}
}
response.Memberships[eventID] = res
}
return nil
}
// QueryMembershipsForRoom implements api.RoomserverInternalAPI
func (r *Queryer) QueryMembershipsForRoom(
ctx context.Context,
request *api.QueryMembershipsForRoomRequest,
response *api.QueryMembershipsForRoomResponse,
) error {
info, err := r.DB.RoomInfo(ctx, request.RoomID)
if err != nil {
return err
}
if info == nil {
return nil
}
// If no sender is specified then we will just return the entire
// set of memberships for the room, regardless of whether a specific
// user is allowed to see them or not.
if request.Sender == "" {
var events []types.Event
var eventNIDs []types.EventNID
eventNIDs, err = r.DB.GetMembershipEventNIDsForRoom(ctx, info.RoomNID, request.JoinedOnly, request.LocalOnly)
if err != nil {
if err == sql.ErrNoRows {
return nil
}
return fmt.Errorf("r.DB.GetMembershipEventNIDsForRoom: %w", err)
}
events, err = r.DB.Events(ctx, eventNIDs)
if err != nil {
return fmt.Errorf("r.DB.Events: %w", err)
}
for _, event := range events {
clientEvent := gomatrixserverlib.ToClientEvent(event.Event, gomatrixserverlib.FormatAll)
response.JoinEvents = append(response.JoinEvents, clientEvent)
}
return nil
}
membershipEventNID, stillInRoom, isRoomforgotten, err := r.DB.GetMembership(ctx, info.RoomNID, request.Sender)
if err != nil {
return err
}
response.IsRoomForgotten = isRoomforgotten
if membershipEventNID == 0 {
response.HasBeenInRoom = false
response.JoinEvents = nil
return nil
}
response.HasBeenInRoom = true
response.JoinEvents = []gomatrixserverlib.ClientEvent{}
var events []types.Event
var stateEntries []types.StateEntry
if stillInRoom {
var eventNIDs []types.EventNID
eventNIDs, err = r.DB.GetMembershipEventNIDsForRoom(ctx, info.RoomNID, request.JoinedOnly, false)
if err != nil {
if err == sql.ErrNoRows {
return nil
}
return err
}
events, err = r.DB.Events(ctx, eventNIDs)
} else {
stateEntries, err = helpers.StateBeforeEvent(ctx, r.DB, info, membershipEventNID)
if err != nil {
logrus.WithField("membership_event_nid", membershipEventNID).WithError(err).Error("failed to load state before event")
return err
}
events, err = helpers.GetMembershipsAtState(ctx, r.DB, stateEntries, request.JoinedOnly)
}
if err != nil {
return err
}
for _, event := range events {
clientEvent := gomatrixserverlib.ToClientEvent(event.Event, gomatrixserverlib.FormatAll)
response.JoinEvents = append(response.JoinEvents, clientEvent)
}
return nil
}
// QueryServerJoinedToRoom implements api.RoomserverInternalAPI
func (r *Queryer) QueryServerJoinedToRoom(
ctx context.Context,
request *api.QueryServerJoinedToRoomRequest,
response *api.QueryServerJoinedToRoomResponse,
) error {
info, err := r.DB.RoomInfo(ctx, request.RoomID)
if err != nil {
return fmt.Errorf("r.DB.RoomInfo: %w", err)
}
if info == nil || info.IsStub() {
return nil
}
response.RoomExists = true
if request.ServerName == r.ServerName || request.ServerName == "" {
response.IsInRoom, err = r.DB.GetLocalServerInRoom(ctx, info.RoomNID)
if err != nil {
return fmt.Errorf("r.DB.GetLocalServerInRoom: %w", err)
}
} else {
response.IsInRoom, err = r.DB.GetServerInRoom(ctx, info.RoomNID, request.ServerName)
if err != nil {
return fmt.Errorf("r.DB.GetServerInRoom: %w", err)
}
}
return nil
}
// QueryServerAllowedToSeeEvent implements api.RoomserverInternalAPI
func (r *Queryer) QueryServerAllowedToSeeEvent(
ctx context.Context,
request *api.QueryServerAllowedToSeeEventRequest,
response *api.QueryServerAllowedToSeeEventResponse,
) (err error) {
events, err := r.DB.EventsFromIDs(ctx, []string{request.EventID})
if err != nil {
return
}
if len(events) == 0 {
response.AllowedToSeeEvent = false // event doesn't exist so not allowed to see
return
}
roomID := events[0].RoomID()
inRoomReq := &api.QueryServerJoinedToRoomRequest{
RoomID: roomID,
ServerName: request.ServerName,
}
inRoomRes := &api.QueryServerJoinedToRoomResponse{}
if err = r.QueryServerJoinedToRoom(ctx, inRoomReq, inRoomRes); err != nil {
return fmt.Errorf("r.Queryer.QueryServerJoinedToRoom: %w", err)
}
info, err := r.DB.RoomInfo(ctx, roomID)
if err != nil {
return err
}
if info == nil || info.IsStub() {
return nil
}
response.AllowedToSeeEvent, err = helpers.CheckServerAllowedToSeeEvent(
ctx, r.DB, info, request.EventID, request.ServerName, inRoomRes.IsInRoom,
)
return
}
// QueryMissingEvents implements api.RoomserverInternalAPI
func (r *Queryer) QueryMissingEvents(
ctx context.Context,
request *api.QueryMissingEventsRequest,
response *api.QueryMissingEventsResponse,
) error {
var front []string
eventsToFilter := make(map[string]bool, len(request.LatestEvents))
visited := make(map[string]bool, request.Limit) // request.Limit acts as a hint to size.
for _, id := range request.EarliestEvents {
visited[id] = true
}
for _, id := range request.LatestEvents {
if !visited[id] {
front = append(front, id)
eventsToFilter[id] = true
}
}
events, err := r.DB.EventsFromIDs(ctx, front)
if err != nil {
return err
}
if len(events) == 0 {
return nil // we are missing the events being asked to search from, give up.
}
info, err := r.DB.RoomInfo(ctx, events[0].RoomID())
if err != nil {
return err
}
if info == nil || info.IsStub() {
return fmt.Errorf("missing RoomInfo for room %s", events[0].RoomID())
}
resultNIDs, redactEventIDs, err := helpers.ScanEventTree(ctx, r.DB, info, front, visited, request.Limit, request.ServerName)
if err != nil {
return err
}
loadedEvents, err := helpers.LoadEvents(ctx, r.DB, resultNIDs)
if err != nil {
return err
}
response.Events = make([]*gomatrixserverlib.HeaderedEvent, 0, len(loadedEvents)-len(eventsToFilter))
for _, event := range loadedEvents {
if !eventsToFilter[event.EventID()] {
roomVersion, verr := r.roomVersion(event.RoomID())
if verr != nil {
return verr
}
if _, ok := redactEventIDs[event.EventID()]; ok {
event.Redact()
}
response.Events = append(response.Events, event.Headered(roomVersion))
}
}
return err
}
// QueryStateAndAuthChain implements api.RoomserverInternalAPI
func (r *Queryer) QueryStateAndAuthChain(
ctx context.Context,
request *api.QueryStateAndAuthChainRequest,
response *api.QueryStateAndAuthChainResponse,
) error {
info, err := r.DB.RoomInfo(ctx, request.RoomID)
if err != nil {
return err
}
if info == nil || info.IsStub() {
return nil
}
response.RoomExists = true
response.RoomVersion = info.RoomVersion
// handle this entirely separately to the other case so we don't have to pull out
// the entire current state of the room
// TODO: this probably means it should be a different query operation...
if request.OnlyFetchAuthChain {
var authEvents []*gomatrixserverlib.Event
authEvents, err = GetAuthChain(ctx, r.DB.EventsFromIDs, request.AuthEventIDs)
if err != nil {
return err
}
for _, event := range authEvents {
response.AuthChainEvents = append(response.AuthChainEvents, event.Headered(info.RoomVersion))
}
return nil
}
var stateEvents []*gomatrixserverlib.Event
stateEvents, rejected, stateMissing, err := r.loadStateAtEventIDs(ctx, info, request.PrevEventIDs)
if err != nil {
return err
}
response.StateKnown = !stateMissing
response.IsRejected = rejected
response.PrevEventsExist = true
// add the auth event IDs for the current state events too
var authEventIDs []string
authEventIDs = append(authEventIDs, request.AuthEventIDs...)
for _, se := range stateEvents {
authEventIDs = append(authEventIDs, se.AuthEventIDs()...)
}
authEventIDs = util.UniqueStrings(authEventIDs) // de-dupe
authEvents, err := GetAuthChain(ctx, r.DB.EventsFromIDs, authEventIDs)
if err != nil {
return err
}
if request.ResolveState {
if stateEvents, err = gomatrixserverlib.ResolveConflicts(
info.RoomVersion, stateEvents, authEvents,
); err != nil {
return err
}
}
for _, event := range stateEvents {
response.StateEvents = append(response.StateEvents, event.Headered(info.RoomVersion))
}
for _, event := range authEvents {
response.AuthChainEvents = append(response.AuthChainEvents, event.Headered(info.RoomVersion))
}
return err
}
// first bool: is rejected, second bool: state missing
func (r *Queryer) loadStateAtEventIDs(ctx context.Context, roomInfo *types.RoomInfo, eventIDs []string) ([]*gomatrixserverlib.Event, bool, bool, error) {
roomState := state.NewStateResolution(r.DB, roomInfo)
prevStates, err := r.DB.StateAtEventIDs(ctx, eventIDs)
if err != nil {
switch err.(type) {
case types.MissingEventError:
return nil, false, true, nil
case types.MissingStateError:
return nil, false, true, nil
default:
return nil, false, false, err
}
}
// Currently only used on /state and /state_ids
rejected := false
for i := range prevStates {
if prevStates[i].IsRejected {
rejected = true
break
}
}
// Look up the currrent state for the requested tuples.
stateEntries, err := roomState.LoadCombinedStateAfterEvents(
ctx, prevStates,
)
if err != nil {
return nil, rejected, false, err
}
events, err := helpers.LoadStateEvents(ctx, r.DB, stateEntries)
return events, rejected, false, err
}
type eventsFromIDs func(context.Context, []string) ([]types.Event, error)
// GetAuthChain fetches the auth chain for the given auth events. An auth chain
// is the list of all events that are referenced in the auth_events section, and
// all their auth_events, recursively. The returned set of events contain the
// given events. Will *not* error if we don't have all auth events.
func GetAuthChain(
ctx context.Context, fn eventsFromIDs, authEventIDs []string,
) ([]*gomatrixserverlib.Event, error) {
// List of event IDs to fetch. On each pass, these events will be requested
// from the database and the `eventsToFetch` will be updated with any new
// events that we have learned about and need to find. When `eventsToFetch`
// is eventually empty, we should have reached the end of the chain.
eventsToFetch := authEventIDs
authEventsMap := make(map[string]*gomatrixserverlib.Event)
for len(eventsToFetch) > 0 {
// Try to retrieve the events from the database.
events, err := fn(ctx, eventsToFetch)
if err != nil {
return nil, err
}
// We've now fetched these events so clear out `eventsToFetch`. Soon we may
// add newly discovered events to this for the next pass.
eventsToFetch = eventsToFetch[:0]
for _, event := range events {
// Store the event in the event map - this prevents us from requesting it
// from the database again.
authEventsMap[event.EventID()] = event.Event
// Extract all of the auth events from the newly obtained event. If we
// don't already have a record of the event, record it in the list of
// events we want to request for the next pass.
for _, authEvent := range event.AuthEvents() {
if _, ok := authEventsMap[authEvent.EventID]; !ok {
eventsToFetch = append(eventsToFetch, authEvent.EventID)
}
}
}
}
// We've now retrieved all of the events we can. Flatten them down into an
// array and return them.
var authEvents []*gomatrixserverlib.Event
for _, event := range authEventsMap {
authEvents = append(authEvents, event)
}
return authEvents, nil
}
// QueryRoomVersionCapabilities implements api.RoomserverInternalAPI
func (r *Queryer) QueryRoomVersionCapabilities(
ctx context.Context,
request *api.QueryRoomVersionCapabilitiesRequest,
response *api.QueryRoomVersionCapabilitiesResponse,
) error {
response.DefaultRoomVersion = version.DefaultRoomVersion()
response.AvailableRoomVersions = make(map[gomatrixserverlib.RoomVersion]string)
for v, desc := range version.SupportedRoomVersions() {
if desc.Stable {
response.AvailableRoomVersions[v] = "stable"
} else {
response.AvailableRoomVersions[v] = "unstable"
}
}
return nil
}
// QueryRoomVersionCapabilities implements api.RoomserverInternalAPI
func (r *Queryer) QueryRoomVersionForRoom(
ctx context.Context,
request *api.QueryRoomVersionForRoomRequest,
response *api.QueryRoomVersionForRoomResponse,
) error {
if roomVersion, ok := r.Cache.GetRoomVersion(request.RoomID); ok {
response.RoomVersion = roomVersion
return nil
}
info, err := r.DB.RoomInfo(ctx, request.RoomID)
if err != nil {
return err
}
if info == nil {
return fmt.Errorf("QueryRoomVersionForRoom: missing room info for room %s", request.RoomID)
}
response.RoomVersion = info.RoomVersion
r.Cache.StoreRoomVersion(request.RoomID, response.RoomVersion)
return nil
}
func (r *Queryer) roomVersion(roomID string) (gomatrixserverlib.RoomVersion, error) {
var res api.QueryRoomVersionForRoomResponse
err := r.QueryRoomVersionForRoom(context.Background(), &api.QueryRoomVersionForRoomRequest{
RoomID: roomID,
}, &res)
return res.RoomVersion, err
}
func (r *Queryer) QueryPublishedRooms(
ctx context.Context,
req *api.QueryPublishedRoomsRequest,
res *api.QueryPublishedRoomsResponse,
) error {
if req.RoomID != "" {
visible, err := r.DB.GetPublishedRoom(ctx, req.RoomID)
if err == nil && visible {
res.RoomIDs = []string{req.RoomID}
return nil
}
return err
}
rooms, err := r.DB.GetPublishedRooms(ctx)
if err != nil {
return err
}
res.RoomIDs = rooms
return nil
}
func (r *Queryer) QueryCurrentState(ctx context.Context, req *api.QueryCurrentStateRequest, res *api.QueryCurrentStateResponse) error {
res.StateEvents = make(map[gomatrixserverlib.StateKeyTuple]*gomatrixserverlib.HeaderedEvent)
for _, tuple := range req.StateTuples {
if tuple.StateKey == "*" && req.AllowWildcards {
events, err := r.DB.GetStateEventsWithEventType(ctx, req.RoomID, tuple.EventType)
if err != nil {
return err
}
for _, e := range events {
res.StateEvents[gomatrixserverlib.StateKeyTuple{
EventType: e.Type(),
StateKey: *e.StateKey(),
}] = e
}
} else {
ev, err := r.DB.GetStateEvent(ctx, req.RoomID, tuple.EventType, tuple.StateKey)
if err != nil {
return err
}
if ev != nil {
res.StateEvents[tuple] = ev
}
}
}
return nil
}
func (r *Queryer) QueryRoomsForUser(ctx context.Context, req *api.QueryRoomsForUserRequest, res *api.QueryRoomsForUserResponse) error {
roomIDs, err := r.DB.GetRoomsByMembership(ctx, req.UserID, req.WantMembership)
if err != nil {
return err
}
res.RoomIDs = roomIDs
return nil
}
func (r *Queryer) QueryKnownUsers(ctx context.Context, req *api.QueryKnownUsersRequest, res *api.QueryKnownUsersResponse) error {
users, err := r.DB.GetKnownUsers(ctx, req.UserID, req.SearchString, req.Limit)
if err != nil && err != sql.ErrNoRows {
return err
}
for _, user := range users {
res.Users = append(res.Users, authtypes.FullyQualifiedProfile{
UserID: user,
})
}
return nil
}
func (r *Queryer) QueryBulkStateContent(ctx context.Context, req *api.QueryBulkStateContentRequest, res *api.QueryBulkStateContentResponse) error {
events, err := r.DB.GetBulkStateContent(ctx, req.RoomIDs, req.StateTuples, req.AllowWildcards)
if err != nil {
return err
}
res.Rooms = make(map[string]map[gomatrixserverlib.StateKeyTuple]string)
for _, ev := range events {
if res.Rooms[ev.RoomID] == nil {
res.Rooms[ev.RoomID] = make(map[gomatrixserverlib.StateKeyTuple]string)
}
room := res.Rooms[ev.RoomID]
room[gomatrixserverlib.StateKeyTuple{
EventType: ev.EventType,
StateKey: ev.StateKey,
}] = ev.ContentValue
res.Rooms[ev.RoomID] = room
}
return nil
}
func (r *Queryer) QuerySharedUsers(ctx context.Context, req *api.QuerySharedUsersRequest, res *api.QuerySharedUsersResponse) error {
roomIDs, err := r.DB.GetRoomsByMembership(ctx, req.UserID, "join")
if err != nil {
return err
}
roomIDs = append(roomIDs, req.IncludeRoomIDs...)
excludeMap := make(map[string]bool)
for _, roomID := range req.ExcludeRoomIDs {
excludeMap[roomID] = true
}
// filter out excluded rooms
j := 0
for i := range roomIDs {
// move elements to include to the beginning of the slice
// then trim elements on the right
if !excludeMap[roomIDs[i]] {
roomIDs[j] = roomIDs[i]
j++
}
}
roomIDs = roomIDs[:j]
users, err := r.DB.JoinedUsersSetInRooms(ctx, roomIDs, req.OtherUserIDs, req.LocalOnly)
if err != nil {
return err
}
res.UserIDsToCount = users
return nil
}
func (r *Queryer) QueryServerBannedFromRoom(ctx context.Context, req *api.QueryServerBannedFromRoomRequest, res *api.QueryServerBannedFromRoomResponse) error {
if r.ServerACLs == nil {
return errors.New("no server ACL tracking")
}
res.Banned = r.ServerACLs.IsServerBannedFromRoom(req.ServerName, req.RoomID)
return nil
}
func (r *Queryer) QueryAuthChain(ctx context.Context, req *api.QueryAuthChainRequest, res *api.QueryAuthChainResponse) error {
chain, err := GetAuthChain(ctx, r.DB.EventsFromIDs, req.EventIDs)
if err != nil {
return err
}
hchain := make([]*gomatrixserverlib.HeaderedEvent, len(chain))
for i := range chain {
hchain[i] = chain[i].Headered(chain[i].Version())
}
res.AuthChain = hchain
return nil
}
// nolint:gocyclo
func (r *Queryer) QueryRestrictedJoinAllowed(ctx context.Context, req *api.QueryRestrictedJoinAllowedRequest, res *api.QueryRestrictedJoinAllowedResponse) error {
// Look up if we know anything about the room. If it doesn't exist
// or is a stub entry then we can't do anything.
roomInfo, err := r.DB.RoomInfo(ctx, req.RoomID)
if err != nil {
return fmt.Errorf("r.DB.RoomInfo: %w", err)
}
if roomInfo == nil || roomInfo.IsStub() {
return nil // fmt.Errorf("room %q doesn't exist or is stub room", req.RoomID)
}
// If the room version doesn't allow restricted joins then don't
// try to process any further.
allowRestrictedJoins, err := roomInfo.RoomVersion.MayAllowRestrictedJoinsInEventAuth()
if err != nil {
return fmt.Errorf("roomInfo.RoomVersion.AllowRestrictedJoinsInEventAuth: %w", err)
} else if !allowRestrictedJoins {
return nil
}
// Start off by populating the "resident" flag in the response. If we
// come across any rooms in the request that are missing, we will unset
// the flag.
res.Resident = true
// Get the join rules to work out if the join rule is "restricted".
joinRulesEvent, err := r.DB.GetStateEvent(ctx, req.RoomID, gomatrixserverlib.MRoomJoinRules, "")
if err != nil {
return fmt.Errorf("r.DB.GetStateEvent: %w", err)
}
if joinRulesEvent == nil {
return nil
}
var joinRules gomatrixserverlib.JoinRuleContent
if err = json.Unmarshal(joinRulesEvent.Content(), &joinRules); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
// If the join rule isn't "restricted" then there's nothing more to do.
res.Restricted = joinRules.JoinRule == gomatrixserverlib.Restricted
if !res.Restricted {
return nil
}
// If the user is already invited to the room then the join is allowed
// but we don't specify an authorised via user, since the event auth
// will allow the join anyway.
var pending bool
if pending, _, _, _, err = helpers.IsInvitePending(ctx, r.DB, req.RoomID, req.UserID); err != nil {
return fmt.Errorf("helpers.IsInvitePending: %w", err)
} else if pending {
res.Allowed = true
return nil
}
// We need to get the power levels content so that we can determine which
// users in the room are entitled to issue invites. We need to use one of
// these users as the authorising user.
powerLevelsEvent, err := r.DB.GetStateEvent(ctx, req.RoomID, gomatrixserverlib.MRoomPowerLevels, "")
if err != nil {
return fmt.Errorf("r.DB.GetStateEvent: %w", err)
}
var powerLevels gomatrixserverlib.PowerLevelContent
if err = json.Unmarshal(powerLevelsEvent.Content(), &powerLevels); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
// Step through the join rules and see if the user matches any of them.
for _, rule := range joinRules.Allow {
// We only understand "m.room_membership" rules at this point in
// time, so skip any rule that doesn't match those.
if rule.Type != gomatrixserverlib.MRoomMembership {
continue
}
// See if the room exists. If it doesn't exist or if it's a stub
// room entry then we can't check memberships.
targetRoomInfo, err := r.DB.RoomInfo(ctx, rule.RoomID)
if err != nil || targetRoomInfo == nil || targetRoomInfo.IsStub() {
res.Resident = false
continue
}
// First of all work out if *we* are still in the room, otherwise
// it's possible that the memberships will be out of date.
isIn, err := r.DB.GetLocalServerInRoom(ctx, targetRoomInfo.RoomNID)
if err != nil || !isIn {
// If we aren't in the room, we can no longer tell if the room
// memberships are up-to-date.
res.Resident = false
continue
}
// At this point we're happy that we are in the room, so now let's
// see if the target user is in the room.
_, isIn, _, err = r.DB.GetMembership(ctx, targetRoomInfo.RoomNID, req.UserID)
if err != nil {
continue
}
// If the user is not in the room then we will skip them.
if !isIn {
continue
}
// The user is in the room, so now we will need to authorise the
// join using the user ID of one of our own users in the room. Pick
// one.
joinNIDs, err := r.DB.GetMembershipEventNIDsForRoom(ctx, targetRoomInfo.RoomNID, true, true)
if err != nil || len(joinNIDs) == 0 {
// There should always be more than one join NID at this point
// because we are gated behind GetLocalServerInRoom, but y'know,
// sometimes strange things happen.
continue
}
// For each of the joined users, let's see if we can get a valid
// membership event.
for _, joinNID := range joinNIDs {
events, err := r.DB.Events(ctx, []types.EventNID{joinNID})
if err != nil || len(events) != 1 {
continue
}
event := events[0]
if event.Type() != gomatrixserverlib.MRoomMember || event.StateKey() == nil {
continue // shouldn't happen
}
// Only users that have the power to invite should be chosen.
if powerLevels.UserLevel(*event.StateKey()) < powerLevels.Invite {
continue
}
res.Resident = true
res.Allowed = true
res.AuthorisedVia = *event.StateKey()
return nil
}
}
return nil
}