package shared import ( "context" "database/sql" "encoding/json" "fmt" "sort" "github.com/matrix-org/dendrite/internal/caching" "github.com/matrix-org/dendrite/internal/sqlutil" "github.com/matrix-org/dendrite/roomserver/storage/tables" "github.com/matrix-org/dendrite/roomserver/types" "github.com/matrix-org/gomatrixserverlib" "github.com/matrix-org/util" "github.com/tidwall/gjson" ) // Ideally, when we have both events we should redact the event JSON and forget about the redaction, but we currently // don't because the redaction code is brand new. When we are more certain that redactions don't misbehave or are // vulnerable to attacks from remote servers (e.g a server bypassing event auth rules shouldn't redact our data) // then we should flip this to true. This will mean redactions /actually delete information irretrievably/ which // will be necessary for compliance with the law. Note that downstream components (syncapi) WILL delete information // in their database on receipt of a redaction. Also note that we still modify the event JSON to set the field // unsigned.redacted_because - we just don't clear out the content fields yet. const redactionsArePermanent = true type Database struct { DB *sql.DB Cache caching.RoomServerCaches Writer sqlutil.Writer EventsTable tables.Events EventJSONTable tables.EventJSON EventTypesTable tables.EventTypes EventStateKeysTable tables.EventStateKeys RoomsTable tables.Rooms StateSnapshotTable tables.StateSnapshot StateBlockTable tables.StateBlock RoomAliasesTable tables.RoomAliases PrevEventsTable tables.PreviousEvents InvitesTable tables.Invites MembershipTable tables.Membership PublishedTable tables.Published RedactionsTable tables.Redactions GetRoomUpdaterFn func(ctx context.Context, roomInfo *types.RoomInfo) (*RoomUpdater, error) } func (d *Database) SupportsConcurrentRoomInputs() bool { return true } func (d *Database) EventTypeNIDs( ctx context.Context, eventTypes []string, ) (map[string]types.EventTypeNID, error) { return d.eventTypeNIDs(ctx, nil, eventTypes) } func (d *Database) eventTypeNIDs( ctx context.Context, txn *sql.Tx, eventTypes []string, ) (map[string]types.EventTypeNID, error) { result := make(map[string]types.EventTypeNID) nids, err := d.EventTypesTable.BulkSelectEventTypeNID(ctx, txn, eventTypes) if err != nil { return nil, err } for eventType, nid := range nids { result[eventType] = nid } return result, nil } func (d *Database) EventStateKeys( ctx context.Context, eventStateKeyNIDs []types.EventStateKeyNID, ) (map[types.EventStateKeyNID]string, error) { result := make(map[types.EventStateKeyNID]string, len(eventStateKeyNIDs)) fetch := make([]types.EventStateKeyNID, 0, len(eventStateKeyNIDs)) for _, nid := range eventStateKeyNIDs { if key, ok := d.Cache.GetEventStateKey(nid); ok { result[nid] = key } else { fetch = append(fetch, nid) } } fromDB, err := d.EventStateKeysTable.BulkSelectEventStateKey(ctx, nil, fetch) if err != nil { return nil, err } for nid, key := range fromDB { result[nid] = key d.Cache.StoreEventStateKey(nid, key) } return result, nil } func (d *Database) EventStateKeyNIDs( ctx context.Context, eventStateKeys []string, ) (map[string]types.EventStateKeyNID, error) { return d.eventStateKeyNIDs(ctx, nil, eventStateKeys) } func (d *Database) eventStateKeyNIDs( ctx context.Context, txn *sql.Tx, eventStateKeys []string, ) (map[string]types.EventStateKeyNID, error) { result := make(map[string]types.EventStateKeyNID) nids, err := d.EventStateKeysTable.BulkSelectEventStateKeyNID(ctx, txn, eventStateKeys) if err != nil { return nil, err } for eventStateKey, nid := range nids { result[eventStateKey] = nid } return result, nil } func (d *Database) StateEntriesForEventIDs( ctx context.Context, eventIDs []string, excludeRejected bool, ) ([]types.StateEntry, error) { return d.EventsTable.BulkSelectStateEventByID(ctx, nil, eventIDs, excludeRejected) } func (d *Database) StateEntriesForTuples( ctx context.Context, stateBlockNIDs []types.StateBlockNID, stateKeyTuples []types.StateKeyTuple, ) ([]types.StateEntryList, error) { return d.stateEntriesForTuples(ctx, nil, stateBlockNIDs, stateKeyTuples) } func (d *Database) stateEntriesForTuples( ctx context.Context, txn *sql.Tx, stateBlockNIDs []types.StateBlockNID, stateKeyTuples []types.StateKeyTuple, ) ([]types.StateEntryList, error) { entries, err := d.StateBlockTable.BulkSelectStateBlockEntries( ctx, txn, stateBlockNIDs, ) if err != nil { return nil, fmt.Errorf("d.StateBlockTable.BulkSelectStateBlockEntries: %w", err) } lists := []types.StateEntryList{} for i, entry := range entries { entries, err := d.EventsTable.BulkSelectStateEventByNID(ctx, txn, entry, stateKeyTuples) if err != nil { return nil, fmt.Errorf("d.EventsTable.BulkSelectStateEventByNID: %w", err) } lists = append(lists, types.StateEntryList{ StateBlockNID: stateBlockNIDs[i], StateEntries: entries, }) } return lists, nil } func (d *Database) RoomInfo(ctx context.Context, roomID string) (*types.RoomInfo, error) { return d.roomInfo(ctx, nil, roomID) } func (d *Database) roomInfo(ctx context.Context, txn *sql.Tx, roomID string) (*types.RoomInfo, error) { roomInfo, err := d.RoomsTable.SelectRoomInfo(ctx, txn, roomID) if err != nil { return nil, err } if roomInfo != nil { d.Cache.StoreRoomServerRoomID(roomInfo.RoomNID, roomID) d.Cache.StoreRoomVersion(roomID, roomInfo.RoomVersion) } return roomInfo, err } func (d *Database) AddState( ctx context.Context, roomNID types.RoomNID, stateBlockNIDs []types.StateBlockNID, state []types.StateEntry, ) (stateNID types.StateSnapshotNID, err error) { return d.addState(ctx, nil, roomNID, stateBlockNIDs, state) } func (d *Database) addState( ctx context.Context, txn *sql.Tx, roomNID types.RoomNID, stateBlockNIDs []types.StateBlockNID, state []types.StateEntry, ) (stateNID types.StateSnapshotNID, err error) { if len(stateBlockNIDs) > 0 && len(state) > 0 { // Check to see if the event already appears in any of the existing state // blocks. If it does then we should not add it again, as this will just // result in excess state blocks and snapshots. // TODO: Investigate why this is happening - probably input_events.go! blocks, berr := d.StateBlockTable.BulkSelectStateBlockEntries(ctx, txn, stateBlockNIDs) if berr != nil { return 0, fmt.Errorf("d.StateBlockTable.BulkSelectStateBlockEntries: %w", berr) } var found bool for i := len(state) - 1; i >= 0; i-- { found = false for _, events := range blocks { for _, event := range events { if state[i].EventNID == event { found = true break } } } if found { state = append(state[:i], state[i+1:]...) i-- } } } err = d.Writer.Do(d.DB, txn, func(txn *sql.Tx) error { if len(state) > 0 { // If there's any state left to add then let's add new blocks. var stateBlockNID types.StateBlockNID stateBlockNID, err = d.StateBlockTable.BulkInsertStateData(ctx, txn, state) if err != nil { return fmt.Errorf("d.StateBlockTable.BulkInsertStateData: %w", err) } stateBlockNIDs = append(stateBlockNIDs[:len(stateBlockNIDs):len(stateBlockNIDs)], stateBlockNID) } stateNID, err = d.StateSnapshotTable.InsertState(ctx, txn, roomNID, stateBlockNIDs) if err != nil { return fmt.Errorf("d.StateSnapshotTable.InsertState: %w", err) } return nil }) if err != nil { return 0, fmt.Errorf("d.Writer.Do: %w", err) } return } func (d *Database) EventNIDs( ctx context.Context, eventIDs []string, ) (map[string]types.EventNID, error) { return d.eventNIDs(ctx, nil, eventIDs, NoFilter) } type UnsentFilter bool const ( NoFilter UnsentFilter = false FilterUnsentOnly UnsentFilter = true ) func (d *Database) eventNIDs( ctx context.Context, txn *sql.Tx, eventIDs []string, filter UnsentFilter, ) (map[string]types.EventNID, error) { switch filter { case FilterUnsentOnly: return d.EventsTable.BulkSelectUnsentEventNID(ctx, txn, eventIDs) case NoFilter: return d.EventsTable.BulkSelectEventNID(ctx, txn, eventIDs) default: panic("impossible case") } } func (d *Database) SetState( ctx context.Context, eventNID types.EventNID, stateNID types.StateSnapshotNID, ) error { return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error { return d.EventsTable.UpdateEventState(ctx, txn, eventNID, stateNID) }) } func (d *Database) StateAtEventIDs( ctx context.Context, eventIDs []string, ) ([]types.StateAtEvent, error) { return d.EventsTable.BulkSelectStateAtEventByID(ctx, nil, eventIDs) } func (d *Database) SnapshotNIDFromEventID( ctx context.Context, eventID string, ) (types.StateSnapshotNID, error) { return d.snapshotNIDFromEventID(ctx, nil, eventID) } func (d *Database) snapshotNIDFromEventID( ctx context.Context, txn *sql.Tx, eventID string, ) (types.StateSnapshotNID, error) { _, stateNID, err := d.EventsTable.SelectEvent(ctx, txn, eventID) if err != nil { return 0, err } if stateNID == 0 { return 0, sql.ErrNoRows // effectively there's no state entry } return stateNID, err } func (d *Database) EventIDs( ctx context.Context, eventNIDs []types.EventNID, ) (map[types.EventNID]string, error) { return d.EventsTable.BulkSelectEventID(ctx, nil, eventNIDs) } func (d *Database) EventsFromIDs(ctx context.Context, eventIDs []string) ([]types.Event, error) { return d.eventsFromIDs(ctx, nil, eventIDs, NoFilter) } func (d *Database) eventsFromIDs(ctx context.Context, txn *sql.Tx, eventIDs []string, filter UnsentFilter) ([]types.Event, error) { nidMap, err := d.eventNIDs(ctx, txn, eventIDs, filter) if err != nil { return nil, err } var nids []types.EventNID for _, nid := range nidMap { nids = append(nids, nid) } return d.events(ctx, txn, nids) } func (d *Database) LatestEventIDs( ctx context.Context, roomNID types.RoomNID, ) (references []gomatrixserverlib.EventReference, currentStateSnapshotNID types.StateSnapshotNID, depth int64, err error) { var eventNIDs []types.EventNID eventNIDs, currentStateSnapshotNID, err = d.RoomsTable.SelectLatestEventNIDs(ctx, nil, roomNID) if err != nil { return } references, err = d.EventsTable.BulkSelectEventReference(ctx, nil, eventNIDs) if err != nil { return } depth, err = d.EventsTable.SelectMaxEventDepth(ctx, nil, eventNIDs) if err != nil { return } return } func (d *Database) StateBlockNIDs( ctx context.Context, stateNIDs []types.StateSnapshotNID, ) ([]types.StateBlockNIDList, error) { return d.stateBlockNIDs(ctx, nil, stateNIDs) } func (d *Database) stateBlockNIDs( ctx context.Context, txn *sql.Tx, stateNIDs []types.StateSnapshotNID, ) ([]types.StateBlockNIDList, error) { return d.StateSnapshotTable.BulkSelectStateBlockNIDs(ctx, txn, stateNIDs) } func (d *Database) StateEntries( ctx context.Context, stateBlockNIDs []types.StateBlockNID, ) ([]types.StateEntryList, error) { return d.stateEntries(ctx, nil, stateBlockNIDs) } func (d *Database) stateEntries( ctx context.Context, txn *sql.Tx, stateBlockNIDs []types.StateBlockNID, ) ([]types.StateEntryList, error) { entries, err := d.StateBlockTable.BulkSelectStateBlockEntries( ctx, txn, stateBlockNIDs, ) if err != nil { return nil, fmt.Errorf("d.StateBlockTable.BulkSelectStateBlockEntries: %w", err) } lists := make([]types.StateEntryList, 0, len(entries)) for i, entry := range entries { eventNIDs, err := d.EventsTable.BulkSelectStateEventByNID(ctx, txn, entry, nil) if err != nil { return nil, fmt.Errorf("d.EventsTable.BulkSelectStateEventByNID: %w", err) } lists = append(lists, types.StateEntryList{ StateBlockNID: stateBlockNIDs[i], StateEntries: eventNIDs, }) } return lists, nil } func (d *Database) SetRoomAlias(ctx context.Context, alias string, roomID string, creatorUserID string) error { return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error { return d.RoomAliasesTable.InsertRoomAlias(ctx, txn, alias, roomID, creatorUserID) }) } func (d *Database) GetRoomIDForAlias(ctx context.Context, alias string) (string, error) { return d.RoomAliasesTable.SelectRoomIDFromAlias(ctx, nil, alias) } func (d *Database) GetAliasesForRoomID(ctx context.Context, roomID string) ([]string, error) { return d.RoomAliasesTable.SelectAliasesFromRoomID(ctx, nil, roomID) } func (d *Database) GetCreatorIDForAlias( ctx context.Context, alias string, ) (string, error) { return d.RoomAliasesTable.SelectCreatorIDFromAlias(ctx, nil, alias) } func (d *Database) RemoveRoomAlias(ctx context.Context, alias string) error { return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error { return d.RoomAliasesTable.DeleteRoomAlias(ctx, txn, alias) }) } func (d *Database) GetMembership(ctx context.Context, roomNID types.RoomNID, requestSenderUserID string) (membershipEventNID types.EventNID, stillInRoom, isRoomforgotten bool, err error) { var requestSenderUserNID types.EventStateKeyNID err = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error { requestSenderUserNID, err = d.assignStateKeyNID(ctx, txn, requestSenderUserID) return err }) if err != nil { return 0, false, false, fmt.Errorf("d.assignStateKeyNID: %w", err) } senderMembershipEventNID, senderMembership, isRoomforgotten, err := d.MembershipTable.SelectMembershipFromRoomAndTarget( ctx, nil, roomNID, requestSenderUserNID, ) if err == sql.ErrNoRows { // The user has never been a member of that room return 0, false, false, nil } else if err != nil { return } return senderMembershipEventNID, senderMembership == tables.MembershipStateJoin, isRoomforgotten, nil } func (d *Database) GetMembershipEventNIDsForRoom( ctx context.Context, roomNID types.RoomNID, joinOnly bool, localOnly bool, ) ([]types.EventNID, error) { return d.getMembershipEventNIDsForRoom(ctx, nil, roomNID, joinOnly, localOnly) } func (d *Database) getMembershipEventNIDsForRoom( ctx context.Context, txn *sql.Tx, roomNID types.RoomNID, joinOnly bool, localOnly bool, ) ([]types.EventNID, error) { if joinOnly { return d.MembershipTable.SelectMembershipsFromRoomAndMembership( ctx, txn, roomNID, tables.MembershipStateJoin, localOnly, ) } return d.MembershipTable.SelectMembershipsFromRoom(ctx, txn, roomNID, localOnly) } func (d *Database) GetInvitesForUser( ctx context.Context, roomNID types.RoomNID, targetUserNID types.EventStateKeyNID, ) (senderUserIDs []types.EventStateKeyNID, eventIDs []string, err error) { return d.InvitesTable.SelectInviteActiveForUserInRoom(ctx, nil, targetUserNID, roomNID) } func (d *Database) Events( ctx context.Context, eventNIDs []types.EventNID, ) ([]types.Event, error) { return d.events(ctx, nil, eventNIDs) } func (d *Database) events( ctx context.Context, txn *sql.Tx, inputEventNIDs types.EventNIDs, ) ([]types.Event, error) { sort.Sort(inputEventNIDs) events := make(map[types.EventNID]*gomatrixserverlib.Event, len(inputEventNIDs)) eventNIDs := make([]types.EventNID, 0, len(inputEventNIDs)) for _, nid := range inputEventNIDs { if event, ok := d.Cache.GetRoomServerEvent(nid); ok && event != nil { events[nid] = event } else { eventNIDs = append(eventNIDs, nid) } } eventJSONs, err := d.EventJSONTable.BulkSelectEventJSON(ctx, txn, eventNIDs) if err != nil { return nil, err } eventIDs, _ := d.EventsTable.BulkSelectEventID(ctx, txn, eventNIDs) if err != nil { eventIDs = map[types.EventNID]string{} } var roomNIDs map[types.EventNID]types.RoomNID roomNIDs, err = d.EventsTable.SelectRoomNIDsForEventNIDs(ctx, txn, eventNIDs) if err != nil { return nil, err } uniqueRoomNIDs := make(map[types.RoomNID]struct{}) for _, n := range roomNIDs { uniqueRoomNIDs[n] = struct{}{} } roomVersions := make(map[types.RoomNID]gomatrixserverlib.RoomVersion) fetchNIDList := make([]types.RoomNID, 0, len(uniqueRoomNIDs)) for n := range uniqueRoomNIDs { if roomID, ok := d.Cache.GetRoomServerRoomID(n); ok { if roomVersion, ok := d.Cache.GetRoomVersion(roomID); ok { roomVersions[n] = roomVersion continue } } fetchNIDList = append(fetchNIDList, n) } dbRoomVersions, err := d.RoomsTable.SelectRoomVersionsForRoomNIDs(ctx, txn, fetchNIDList) if err != nil { return nil, err } for n, v := range dbRoomVersions { roomVersions[n] = v } for _, eventJSON := range eventJSONs { roomNID := roomNIDs[eventJSON.EventNID] roomVersion := roomVersions[roomNID] events[eventJSON.EventNID], err = gomatrixserverlib.NewEventFromTrustedJSONWithEventID( eventIDs[eventJSON.EventNID], eventJSON.EventJSON, false, roomVersion, ) if err != nil { return nil, err } if event := events[eventJSON.EventNID]; event != nil { d.Cache.StoreRoomServerEvent(eventJSON.EventNID, event) } } results := make([]types.Event, 0, len(inputEventNIDs)) for _, nid := range inputEventNIDs { event, ok := events[nid] if !ok || event == nil { return nil, fmt.Errorf("event %d missing", nid) } results = append(results, types.Event{ EventNID: nid, Event: event, }) } if !redactionsArePermanent { d.applyRedactions(results) } return results, nil } func (d *Database) MembershipUpdater( ctx context.Context, roomID, targetUserID string, targetLocal bool, roomVersion gomatrixserverlib.RoomVersion, ) (*MembershipUpdater, error) { txn, err := d.DB.Begin() if err != nil { return nil, err } var updater *MembershipUpdater _ = d.Writer.Do(d.DB, txn, func(txn *sql.Tx) error { updater, err = NewMembershipUpdater(ctx, d, txn, roomID, targetUserID, targetLocal, roomVersion) return err }) return updater, err } func (d *Database) GetRoomUpdater( ctx context.Context, roomInfo *types.RoomInfo, ) (*RoomUpdater, error) { if d.GetRoomUpdaterFn != nil { return d.GetRoomUpdaterFn(ctx, roomInfo) } txn, err := d.DB.Begin() if err != nil { return nil, err } var updater *RoomUpdater _ = d.Writer.Do(d.DB, txn, func(txn *sql.Tx) error { updater, err = NewRoomUpdater(ctx, d, txn, roomInfo) return err }) return updater, err } func (d *Database) IsEventRejected(ctx context.Context, roomNID types.RoomNID, eventID string) (bool, error) { return d.EventsTable.SelectEventRejected(ctx, nil, roomNID, eventID) } func (d *Database) StoreEvent( ctx context.Context, event *gomatrixserverlib.Event, authEventNIDs []types.EventNID, isRejected bool, ) (types.EventNID, types.RoomNID, types.StateAtEvent, *gomatrixserverlib.Event, string, error) { return d.storeEvent(ctx, nil, event, authEventNIDs, isRejected) } func (d *Database) storeEvent( ctx context.Context, updater *RoomUpdater, event *gomatrixserverlib.Event, authEventNIDs []types.EventNID, isRejected bool, ) (types.EventNID, types.RoomNID, types.StateAtEvent, *gomatrixserverlib.Event, string, error) { var ( roomNID types.RoomNID eventTypeNID types.EventTypeNID eventStateKeyNID types.EventStateKeyNID eventNID types.EventNID stateNID types.StateSnapshotNID redactionEvent *gomatrixserverlib.Event redactedEventID string err error ) var txn *sql.Tx if updater != nil && updater.txn != nil { txn = updater.txn } // First writer is with a database-provided transaction, so that NIDs are assigned // globally outside of the updater context, to help avoid races. err = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error { // TODO: Here we should aim to have two different code paths for new rooms // vs existing ones. // Get the default room version. If the client doesn't supply a room_version // then we will use our configured default to create the room. // https://matrix.org/docs/spec/client_server/r0.6.0#post-matrix-client-r0-createroom // Note that the below logic depends on the m.room.create event being the // first event that is persisted to the database when creating or joining a // room. var roomVersion gomatrixserverlib.RoomVersion if roomVersion, err = extractRoomVersionFromCreateEvent(event); err != nil { return fmt.Errorf("extractRoomVersionFromCreateEvent: %w", err) } if roomNID, err = d.assignRoomNID(ctx, txn, event.RoomID(), roomVersion); err != nil { return fmt.Errorf("d.assignRoomNID: %w", err) } if eventTypeNID, err = d.assignEventTypeNID(ctx, txn, event.Type()); err != nil { return fmt.Errorf("d.assignEventTypeNID: %w", err) } eventStateKey := event.StateKey() // Assigned a numeric ID for the state_key if there is one present. // Otherwise set the numeric ID for the state_key to 0. if eventStateKey != nil { if eventStateKeyNID, err = d.assignStateKeyNID(ctx, txn, *eventStateKey); err != nil { return fmt.Errorf("d.assignStateKeyNID: %w", err) } } return nil }) if err != nil { return 0, 0, types.StateAtEvent{}, nil, "", fmt.Errorf("d.Writer.Do: %w", err) } // Second writer is using the database-provided transaction, probably from the // room updater, for easy roll-back if required. err = d.Writer.Do(d.DB, txn, func(txn *sql.Tx) error { if eventNID, stateNID, err = d.EventsTable.InsertEvent( ctx, txn, roomNID, eventTypeNID, eventStateKeyNID, event.EventID(), event.EventReference().EventSHA256, authEventNIDs, event.Depth(), isRejected, ); err != nil { if err == sql.ErrNoRows { // We've already inserted the event so select the numeric event ID eventNID, stateNID, err = d.EventsTable.SelectEvent(ctx, txn, event.EventID()) } else if err != nil { return fmt.Errorf("d.EventsTable.InsertEvent: %w", err) } if err != nil { return fmt.Errorf("d.EventsTable.SelectEvent: %w", err) } } if err = d.EventJSONTable.InsertEventJSON(ctx, txn, eventNID, event.JSON()); err != nil { return fmt.Errorf("d.EventJSONTable.InsertEventJSON: %w", err) } if !isRejected { // ignore rejected redaction events redactionEvent, redactedEventID, err = d.handleRedactions(ctx, txn, eventNID, event) if err != nil { return fmt.Errorf("d.handleRedactions: %w", err) } } return nil }) if err != nil { return 0, 0, types.StateAtEvent{}, nil, "", fmt.Errorf("d.Writer.Do: %w", err) } // We should attempt to update the previous events table with any // references that this new event makes. We do this using a latest // events updater because it somewhat works as a mutex, ensuring // that there's a row-level lock on the latest room events (well, // on Postgres at least). if prevEvents := event.PrevEvents(); len(prevEvents) > 0 { // Create an updater - NB: on sqlite this WILL create a txn as we are directly calling the shared DB form of // GetLatestEventsForUpdate - not via the SQLiteDatabase form which has `nil` txns. This // function only does SELECTs though so the created txn (at this point) is just a read txn like // any other so this is fine. If we ever update GetLatestEventsForUpdate or NewLatestEventsUpdater // to do writes however then this will need to go inside `Writer.Do`. succeeded := false if updater == nil { var roomInfo *types.RoomInfo roomInfo, err = d.roomInfo(ctx, txn, event.RoomID()) if err != nil { return 0, 0, types.StateAtEvent{}, nil, "", fmt.Errorf("d.RoomInfo: %w", err) } if roomInfo == nil && len(prevEvents) > 0 { return 0, 0, types.StateAtEvent{}, nil, "", fmt.Errorf("expected room %q to exist", event.RoomID()) } updater, err = d.GetRoomUpdater(ctx, roomInfo) if err != nil { return 0, 0, types.StateAtEvent{}, nil, "", fmt.Errorf("GetRoomUpdater: %w", err) } defer sqlutil.EndTransactionWithCheck(updater, &succeeded, &err) } if err = updater.StorePreviousEvents(eventNID, prevEvents); err != nil { return 0, 0, types.StateAtEvent{}, nil, "", fmt.Errorf("updater.StorePreviousEvents: %w", err) } succeeded = true } return eventNID, roomNID, types.StateAtEvent{ BeforeStateSnapshotNID: stateNID, StateEntry: types.StateEntry{ StateKeyTuple: types.StateKeyTuple{ EventTypeNID: eventTypeNID, EventStateKeyNID: eventStateKeyNID, }, EventNID: eventNID, }, }, redactionEvent, redactedEventID, err } func (d *Database) PublishRoom(ctx context.Context, roomID string, publish bool) error { return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error { return d.PublishedTable.UpsertRoomPublished(ctx, txn, roomID, publish) }) } func (d *Database) GetPublishedRoom(ctx context.Context, roomID string) (bool, error) { return d.PublishedTable.SelectPublishedFromRoomID(ctx, nil, roomID) } func (d *Database) GetPublishedRooms(ctx context.Context) ([]string, error) { return d.PublishedTable.SelectAllPublishedRooms(ctx, nil, true) } func (d *Database) MissingAuthPrevEvents( ctx context.Context, e *gomatrixserverlib.Event, ) (missingAuth, missingPrev []string, err error) { authEventNIDs, err := d.EventNIDs(ctx, e.AuthEventIDs()) if err != nil { return nil, nil, fmt.Errorf("d.EventNIDs: %w", err) } for _, authEventID := range e.AuthEventIDs() { if _, ok := authEventNIDs[authEventID]; !ok { missingAuth = append(missingAuth, authEventID) } } for _, prevEventID := range e.PrevEventIDs() { state, err := d.StateAtEventIDs(ctx, []string{prevEventID}) if err != nil || len(state) == 0 || (!state[0].IsCreate() && state[0].BeforeStateSnapshotNID == 0) { missingPrev = append(missingPrev, prevEventID) } } return } func (d *Database) assignRoomNID( ctx context.Context, txn *sql.Tx, roomID string, roomVersion gomatrixserverlib.RoomVersion, ) (types.RoomNID, error) { // Check if we already have a numeric ID in the database. roomNID, err := d.RoomsTable.SelectRoomNID(ctx, txn, roomID) if err == sql.ErrNoRows { // We don't have a numeric ID so insert one into the database. roomNID, err = d.RoomsTable.InsertRoomNID(ctx, txn, roomID, roomVersion) if err == sql.ErrNoRows { // We raced with another insert so run the select again. roomNID, err = d.RoomsTable.SelectRoomNID(ctx, txn, roomID) } } return roomNID, err } func (d *Database) assignEventTypeNID( ctx context.Context, txn *sql.Tx, eventType string, ) (types.EventTypeNID, error) { // Check if we already have a numeric ID in the database. eventTypeNID, err := d.EventTypesTable.SelectEventTypeNID(ctx, txn, eventType) if err == sql.ErrNoRows { // We don't have a numeric ID so insert one into the database. eventTypeNID, err = d.EventTypesTable.InsertEventTypeNID(ctx, txn, eventType) if err == sql.ErrNoRows { // We raced with another insert so run the select again. eventTypeNID, err = d.EventTypesTable.SelectEventTypeNID(ctx, txn, eventType) } } return eventTypeNID, err } func (d *Database) assignStateKeyNID( ctx context.Context, txn *sql.Tx, eventStateKey string, ) (types.EventStateKeyNID, error) { // Check if we already have a numeric ID in the database. eventStateKeyNID, err := d.EventStateKeysTable.SelectEventStateKeyNID(ctx, txn, eventStateKey) if err == sql.ErrNoRows { // We don't have a numeric ID so insert one into the database. eventStateKeyNID, err = d.EventStateKeysTable.InsertEventStateKeyNID(ctx, txn, eventStateKey) if err == sql.ErrNoRows { // We raced with another insert so run the select again. eventStateKeyNID, err = d.EventStateKeysTable.SelectEventStateKeyNID(ctx, txn, eventStateKey) } } return eventStateKeyNID, err } func extractRoomVersionFromCreateEvent(event *gomatrixserverlib.Event) ( gomatrixserverlib.RoomVersion, error, ) { var err error var roomVersion gomatrixserverlib.RoomVersion // Look for m.room.create events. if event.Type() != gomatrixserverlib.MRoomCreate { return gomatrixserverlib.RoomVersion(""), nil } roomVersion = gomatrixserverlib.RoomVersionV1 var createContent gomatrixserverlib.CreateContent // The m.room.create event contains an optional "room_version" key in // the event content, so we need to unmarshal that first. if err = json.Unmarshal(event.Content(), &createContent); err != nil { return gomatrixserverlib.RoomVersion(""), err } // A room version was specified in the event content? if createContent.RoomVersion != nil { roomVersion = gomatrixserverlib.RoomVersion(*createContent.RoomVersion) } return roomVersion, err } // handleRedactions manages the redacted status of events. There's two cases to consider in order to comply with the spec: // "servers should not apply or send redactions to clients until both the redaction event and original event have been seen, and are valid." // https://matrix.org/docs/spec/rooms/v3#authorization-rules-for-events // These cases are: // - This is a redaction event, redact the event it references if we know about it. // - This is a normal event which may have been previously redacted. // // In the first case, check if we have the referenced event then apply the redaction, else store it // in the redactions table with validated=FALSE. In the second case, check if there is a redaction for it: // if there is then apply the redactions and set validated=TRUE. // // When an event is redacted, the redacted event JSON is modified to add an `unsigned.redacted_because` field. We use this field // when loading events to determine whether to apply redactions. This keeps the hot-path of reading events quick as we don't need // to cross-reference with other tables when loading. // // Returns the redaction event and the event ID of the redacted event if this call resulted in a redaction. func (d *Database) handleRedactions( ctx context.Context, txn *sql.Tx, eventNID types.EventNID, event *gomatrixserverlib.Event, ) (*gomatrixserverlib.Event, string, error) { var err error isRedactionEvent := event.Type() == gomatrixserverlib.MRoomRedaction && event.StateKey() == nil if isRedactionEvent { // an event which redacts itself should be ignored if event.EventID() == event.Redacts() { return nil, "", nil } err = d.RedactionsTable.InsertRedaction(ctx, txn, tables.RedactionInfo{ Validated: false, RedactionEventID: event.EventID(), RedactsEventID: event.Redacts(), }) if err != nil { return nil, "", fmt.Errorf("d.RedactionsTable.InsertRedaction: %w", err) } } redactionEvent, redactedEvent, validated, err := d.loadRedactionPair(ctx, txn, eventNID, event) if err != nil { return nil, "", fmt.Errorf("d.loadRedactionPair: %w", err) } if validated || redactedEvent == nil || redactionEvent == nil { // we've seen this redaction before or there is nothing to redact return nil, "", nil } if redactedEvent.RoomID() != redactionEvent.RoomID() { // redactions across rooms aren't allowed return nil, "", nil } // Get the power level from the database, so we can verify the user is allowed to redact the event powerLevels, err := d.GetStateEvent(ctx, event.RoomID(), gomatrixserverlib.MRoomPowerLevels, "") if err != nil { return nil, "", fmt.Errorf("d.GetStateEvent: %w", err) } if powerLevels == nil { return nil, "", fmt.Errorf("unable to fetch m.room.power_levels event from database for room %s", event.RoomID()) } pl, err := powerLevels.PowerLevels() if err != nil { return nil, "", fmt.Errorf("unable to get powerlevels for room: %w", err) } redactUser := pl.UserLevel(redactionEvent.Sender()) switch { case redactUser >= pl.Redact: // The power level of the redaction event’s sender is greater than or equal to the redact level. case redactedEvent.Origin() == redactionEvent.Origin() && redactedEvent.Sender() == redactionEvent.Sender(): // The domain of the redaction event’s sender matches that of the original event’s sender. default: return nil, "", nil } // mark the event as redacted if redactionsArePermanent { redactedEvent.Redact() } err = redactedEvent.SetUnsignedField("redacted_because", redactionEvent) if err != nil { return nil, "", fmt.Errorf("redactedEvent.SetUnsignedField: %w", err) } // NOTSPEC: sytest relies on this unspecced field existing :( err = redactedEvent.SetUnsignedField("redacted_by", redactionEvent.EventID()) if err != nil { return nil, "", fmt.Errorf("redactedEvent.SetUnsignedField: %w", err) } // overwrite the eventJSON table err = d.EventJSONTable.InsertEventJSON(ctx, txn, redactedEvent.EventNID, redactedEvent.JSON()) if err != nil { return nil, "", fmt.Errorf("d.EventJSONTable.InsertEventJSON: %w", err) } err = d.RedactionsTable.MarkRedactionValidated(ctx, txn, redactionEvent.EventID(), true) if err != nil { err = fmt.Errorf("d.RedactionsTable.MarkRedactionValidated: %w", err) } return redactionEvent.Event, redactedEvent.EventID(), err } // loadRedactionPair returns both the redaction event and the redacted event, else nil. func (d *Database) loadRedactionPair( ctx context.Context, txn *sql.Tx, eventNID types.EventNID, event *gomatrixserverlib.Event, ) (*types.Event, *types.Event, bool, error) { var redactionEvent, redactedEvent *types.Event var info *tables.RedactionInfo var err error isRedactionEvent := event.Type() == gomatrixserverlib.MRoomRedaction && event.StateKey() == nil var eventBeingRedacted string if isRedactionEvent { eventBeingRedacted = event.Redacts() redactionEvent = &types.Event{ EventNID: eventNID, Event: event, } } else { eventBeingRedacted = event.EventID() // maybe, we'll see if we have info redactedEvent = &types.Event{ EventNID: eventNID, Event: event, } } info, err = d.RedactionsTable.SelectRedactionInfoByEventBeingRedacted(ctx, txn, eventBeingRedacted) if err != nil { return nil, nil, false, err } if info == nil { // this event hasn't been redacted or we don't have the redaction for it yet return nil, nil, false, nil } if isRedactionEvent { redactedEvent = d.loadEvent(ctx, info.RedactsEventID) } else { redactionEvent = d.loadEvent(ctx, info.RedactionEventID) } return redactionEvent, redactedEvent, info.Validated, nil } // applyRedactions will redact events that have an `unsigned.redacted_because` field. func (d *Database) applyRedactions(events []types.Event) { for i := range events { if result := gjson.GetBytes(events[i].Unsigned(), "redacted_because"); result.Exists() { events[i].Redact() } } } // loadEvent loads a single event or returns nil on any problems/missing event func (d *Database) loadEvent(ctx context.Context, eventID string) *types.Event { nids, err := d.EventNIDs(ctx, []string{eventID}) if err != nil { return nil } if len(nids) == 0 { return nil } evs, err := d.Events(ctx, []types.EventNID{nids[eventID]}) if err != nil { return nil } if len(evs) != 1 { return nil } return &evs[0] } func (d *Database) GetHistoryVisibilityState(ctx context.Context, roomInfo *types.RoomInfo, eventID string, domain string) ([]*gomatrixserverlib.Event, error) { eventStates, err := d.EventsTable.BulkSelectStateAtEventByID(ctx, nil, []string{eventID}) if err != nil { return nil, err } stateSnapshotNID := eventStates[0].BeforeStateSnapshotNID if stateSnapshotNID == 0 { return nil, nil } eventNIDs, err := d.StateSnapshotTable.BulkSelectStateForHistoryVisibility(ctx, nil, stateSnapshotNID, domain) if err != nil { return nil, err } eventIDs, _ := d.EventsTable.BulkSelectEventID(ctx, nil, eventNIDs) if err != nil { eventIDs = map[types.EventNID]string{} } events := make([]*gomatrixserverlib.Event, 0, len(eventNIDs)) for _, eventNID := range eventNIDs { data, err := d.EventJSONTable.BulkSelectEventJSON(ctx, nil, []types.EventNID{eventNID}) if err != nil { return nil, err } ev, err := gomatrixserverlib.NewEventFromTrustedJSONWithEventID(eventIDs[eventNID], data[0].EventJSON, false, roomInfo.RoomVersion) if err != nil { return nil, err } events = append(events, ev) } return events, nil } // GetStateEvent returns the current state event of a given type for a given room with a given state key // If no event could be found, returns nil // If there was an issue during the retrieval, returns an error func (d *Database) GetStateEvent(ctx context.Context, roomID, evType, stateKey string) (*gomatrixserverlib.HeaderedEvent, error) { roomInfo, err := d.RoomInfo(ctx, roomID) if err != nil { return nil, err } if roomInfo == nil { return nil, fmt.Errorf("room %s doesn't exist", roomID) } // e.g invited rooms if roomInfo.IsStub() { return nil, nil } eventTypeNID, err := d.EventTypesTable.SelectEventTypeNID(ctx, nil, evType) if err == sql.ErrNoRows { // No rooms have an event of this type, otherwise we'd have an event type NID return nil, nil } if err != nil { return nil, err } stateKeyNID, err := d.EventStateKeysTable.SelectEventStateKeyNID(ctx, nil, stateKey) if err == sql.ErrNoRows { // No rooms have a state event with this state key, otherwise we'd have an state key NID return nil, nil } if err != nil { return nil, err } entries, err := d.loadStateAtSnapshot(ctx, roomInfo.StateSnapshotNID()) if err != nil { return nil, err } var eventNIDs []types.EventNID for _, e := range entries { if e.EventTypeNID == eventTypeNID && e.EventStateKeyNID == stateKeyNID { eventNIDs = append(eventNIDs, e.EventNID) } } eventIDs, _ := d.EventsTable.BulkSelectEventID(ctx, nil, eventNIDs) if err != nil { eventIDs = map[types.EventNID]string{} } // return the event requested for _, e := range entries { if e.EventTypeNID == eventTypeNID && e.EventStateKeyNID == stateKeyNID { data, err := d.EventJSONTable.BulkSelectEventJSON(ctx, nil, []types.EventNID{e.EventNID}) if err != nil { return nil, err } if len(data) == 0 { return nil, fmt.Errorf("GetStateEvent: no json for event nid %d", e.EventNID) } ev, err := gomatrixserverlib.NewEventFromTrustedJSONWithEventID(eventIDs[e.EventNID], data[0].EventJSON, false, roomInfo.RoomVersion) if err != nil { return nil, err } return ev.Headered(roomInfo.RoomVersion), nil } } return nil, nil } // Same as GetStateEvent but returns all matching state events with this event type. Returns no error // if there are no events with this event type. func (d *Database) GetStateEventsWithEventType(ctx context.Context, roomID, evType string) ([]*gomatrixserverlib.HeaderedEvent, error) { roomInfo, err := d.RoomInfo(ctx, roomID) if err != nil { return nil, err } if roomInfo == nil { return nil, fmt.Errorf("room %s doesn't exist", roomID) } // e.g invited rooms if roomInfo.IsStub() { return nil, nil } eventTypeNID, err := d.EventTypesTable.SelectEventTypeNID(ctx, nil, evType) if err == sql.ErrNoRows { // No rooms have an event of this type, otherwise we'd have an event type NID return nil, nil } if err != nil { return nil, err } entries, err := d.loadStateAtSnapshot(ctx, roomInfo.StateSnapshotNID()) if err != nil { return nil, err } var eventNIDs []types.EventNID for _, e := range entries { if e.EventTypeNID == eventTypeNID { eventNIDs = append(eventNIDs, e.EventNID) } } eventIDs, _ := d.EventsTable.BulkSelectEventID(ctx, nil, eventNIDs) if err != nil { eventIDs = map[types.EventNID]string{} } // return the events requested eventPairs, err := d.EventJSONTable.BulkSelectEventJSON(ctx, nil, eventNIDs) if err != nil { return nil, err } if len(eventPairs) == 0 { return nil, nil } var result []*gomatrixserverlib.HeaderedEvent for _, pair := range eventPairs { ev, err := gomatrixserverlib.NewEventFromTrustedJSONWithEventID(eventIDs[pair.EventNID], pair.EventJSON, false, roomInfo.RoomVersion) if err != nil { return nil, err } result = append(result, ev.Headered(roomInfo.RoomVersion)) } return result, nil } // GetRoomsByMembership returns a list of room IDs matching the provided membership and user ID (as state_key). func (d *Database) GetRoomsByMembership(ctx context.Context, userID, membership string) ([]string, error) { var membershipState tables.MembershipState switch membership { case "join": membershipState = tables.MembershipStateJoin case "invite": membershipState = tables.MembershipStateInvite case "leave": membershipState = tables.MembershipStateLeaveOrBan case "ban": membershipState = tables.MembershipStateLeaveOrBan default: return nil, fmt.Errorf("GetRoomsByMembership: invalid membership %s", membership) } stateKeyNID, err := d.EventStateKeysTable.SelectEventStateKeyNID(ctx, nil, userID) if err != nil { if err == sql.ErrNoRows { return nil, nil } return nil, fmt.Errorf("GetRoomsByMembership: cannot map user ID to state key NID: %w", err) } roomNIDs, err := d.MembershipTable.SelectRoomsWithMembership(ctx, nil, stateKeyNID, membershipState) if err != nil { return nil, fmt.Errorf("GetRoomsByMembership: failed to SelectRoomsWithMembership: %w", err) } roomIDs, err := d.RoomsTable.BulkSelectRoomIDs(ctx, nil, roomNIDs) if err != nil { return nil, fmt.Errorf("GetRoomsByMembership: failed to lookup room nids: %w", err) } if len(roomIDs) != len(roomNIDs) { return nil, fmt.Errorf("GetRoomsByMembership: missing room IDs, got %d want %d", len(roomIDs), len(roomNIDs)) } return roomIDs, nil } // GetBulkStateContent returns all state events which match a given room ID and a given state key tuple. Both must be satisfied for a match. // If a tuple has the StateKey of '*' and allowWildcards=true then all state events with the EventType should be returned. func (d *Database) GetBulkStateContent(ctx context.Context, roomIDs []string, tuples []gomatrixserverlib.StateKeyTuple, allowWildcards bool) ([]tables.StrippedEvent, error) { eventTypes := make([]string, 0, len(tuples)) for _, tuple := range tuples { eventTypes = append(eventTypes, tuple.EventType) } // we don't bother failing the request if we get asked for event types we don't know about, as all that would result in is no matches which // isn't a failure. eventTypeNIDMap, err := d.EventTypesTable.BulkSelectEventTypeNID(ctx, nil, eventTypes) if err != nil { return nil, fmt.Errorf("GetBulkStateContent: failed to map event type nids: %w", err) } typeNIDSet := make(map[types.EventTypeNID]bool) for _, nid := range eventTypeNIDMap { typeNIDSet[nid] = true } allowWildcard := make(map[types.EventTypeNID]bool) eventStateKeys := make([]string, 0, len(tuples)) for _, tuple := range tuples { if allowWildcards && tuple.StateKey == "*" { allowWildcard[eventTypeNIDMap[tuple.EventType]] = true continue } eventStateKeys = append(eventStateKeys, tuple.StateKey) } eventStateKeyNIDMap, err := d.EventStateKeysTable.BulkSelectEventStateKeyNID(ctx, nil, eventStateKeys) if err != nil { return nil, fmt.Errorf("GetBulkStateContent: failed to map state key nids: %w", err) } stateKeyNIDSet := make(map[types.EventStateKeyNID]bool) for _, nid := range eventStateKeyNIDMap { stateKeyNIDSet[nid] = true } var eventNIDs []types.EventNID eventNIDToVer := make(map[types.EventNID]gomatrixserverlib.RoomVersion) // TODO: This feels like this is going to be really slow... for _, roomID := range roomIDs { roomInfo, err2 := d.RoomInfo(ctx, roomID) if err2 != nil { return nil, fmt.Errorf("GetBulkStateContent: failed to load room info for room %s : %w", roomID, err2) } // for unknown rooms or rooms which we don't have the current state, skip them. if roomInfo == nil || roomInfo.IsStub() { continue } entries, err2 := d.loadStateAtSnapshot(ctx, roomInfo.StateSnapshotNID()) if err2 != nil { return nil, fmt.Errorf("GetBulkStateContent: failed to load state for room %s : %w", roomID, err2) } for _, entry := range entries { if typeNIDSet[entry.EventTypeNID] { if allowWildcard[entry.EventTypeNID] || stateKeyNIDSet[entry.EventStateKeyNID] { eventNIDs = append(eventNIDs, entry.EventNID) eventNIDToVer[entry.EventNID] = roomInfo.RoomVersion } } } } eventIDs, _ := d.EventsTable.BulkSelectEventID(ctx, nil, eventNIDs) if err != nil { eventIDs = map[types.EventNID]string{} } events, err := d.EventJSONTable.BulkSelectEventJSON(ctx, nil, eventNIDs) if err != nil { return nil, fmt.Errorf("GetBulkStateContent: failed to load event JSON for event nids: %w", err) } result := make([]tables.StrippedEvent, len(events)) for i := range events { roomVer := eventNIDToVer[events[i].EventNID] ev, err := gomatrixserverlib.NewEventFromTrustedJSONWithEventID(eventIDs[events[i].EventNID], events[i].EventJSON, false, roomVer) if err != nil { return nil, fmt.Errorf("GetBulkStateContent: failed to load event JSON for event NID %v : %w", events[i].EventNID, err) } result[i] = tables.StrippedEvent{ EventType: ev.Type(), RoomID: ev.RoomID(), StateKey: *ev.StateKey(), ContentValue: tables.ExtractContentValue(ev.Headered(roomVer)), } } return result, nil } // JoinedUsersSetInRooms returns a map of how many times the given users appear in the specified rooms. func (d *Database) JoinedUsersSetInRooms(ctx context.Context, roomIDs, userIDs []string) (map[string]int, error) { roomNIDs, err := d.RoomsTable.BulkSelectRoomNIDs(ctx, nil, roomIDs) if err != nil { return nil, err } userNIDsMap, err := d.EventStateKeysTable.BulkSelectEventStateKeyNID(ctx, nil, userIDs) if err != nil { return nil, err } userNIDs := make([]types.EventStateKeyNID, 0, len(userNIDsMap)) nidToUserID := make(map[types.EventStateKeyNID]string, len(userNIDsMap)) for id, nid := range userNIDsMap { userNIDs = append(userNIDs, nid) nidToUserID[nid] = id } userNIDToCount, err := d.MembershipTable.SelectJoinedUsersSetForRooms(ctx, nil, roomNIDs, userNIDs) if err != nil { return nil, err } stateKeyNIDs := make([]types.EventStateKeyNID, len(userNIDToCount)) i := 0 for nid := range userNIDToCount { stateKeyNIDs[i] = nid i++ } // If we didn't have any userIDs to look up, get the UserIDs for the returned userNIDToCount now if len(userIDs) == 0 { nidToUserID, err = d.EventStateKeys(ctx, stateKeyNIDs) if err != nil { return nil, err } } result := make(map[string]int, len(userNIDToCount)) for nid, count := range userNIDToCount { result[nidToUserID[nid]] = count } return result, nil } // GetLocalServerInRoom returns true if we think we're in a given room or false otherwise. func (d *Database) GetLocalServerInRoom(ctx context.Context, roomNID types.RoomNID) (bool, error) { return d.MembershipTable.SelectLocalServerInRoom(ctx, nil, roomNID) } // GetServerInRoom returns true if we think a server is in a given room or false otherwise. func (d *Database) GetServerInRoom(ctx context.Context, roomNID types.RoomNID, serverName gomatrixserverlib.ServerName) (bool, error) { return d.MembershipTable.SelectServerInRoom(ctx, nil, roomNID, serverName) } // GetKnownUsers searches all users that userID knows about. func (d *Database) GetKnownUsers(ctx context.Context, userID, searchString string, limit int) ([]string, error) { stateKeyNID, err := d.EventStateKeysTable.SelectEventStateKeyNID(ctx, nil, userID) if err != nil { return nil, err } return d.MembershipTable.SelectKnownUsers(ctx, nil, stateKeyNID, searchString, limit) } // GetKnownRooms returns a list of all rooms we know about. func (d *Database) GetKnownRooms(ctx context.Context) ([]string, error) { return d.RoomsTable.SelectRoomIDsWithEvents(ctx, nil) } // ForgetRoom sets a users room to forgotten func (d *Database) ForgetRoom(ctx context.Context, userID, roomID string, forget bool) error { roomNIDs, err := d.RoomsTable.BulkSelectRoomNIDs(ctx, nil, []string{roomID}) if err != nil { return err } if len(roomNIDs) > 1 { return fmt.Errorf("expected one room, got %d", len(roomNIDs)) } stateKeyNID, err := d.EventStateKeysTable.SelectEventStateKeyNID(ctx, nil, userID) if err != nil { return err } return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error { return d.MembershipTable.UpdateForgetMembership(ctx, nil, roomNIDs[0], stateKeyNID, forget) }) } // FIXME TODO: Remove all this - horrible dupe with roomserver/state. Can't use the original impl because of circular loops // it should live in this package! func (d *Database) loadStateAtSnapshot( ctx context.Context, stateNID types.StateSnapshotNID, ) ([]types.StateEntry, error) { stateBlockNIDLists, err := d.StateBlockNIDs(ctx, []types.StateSnapshotNID{stateNID}) if err != nil { return nil, err } // We've asked for exactly one snapshot from the db so we should have exactly one entry in the result. stateBlockNIDList := stateBlockNIDLists[0] stateEntryLists, err := d.StateEntries(ctx, stateBlockNIDList.StateBlockNIDs) if err != nil { return nil, err } stateEntriesMap := stateEntryListMap(stateEntryLists) // Combine all the state entries for this snapshot. // The order of state block NIDs in the list tells us the order to combine them in. var fullState []types.StateEntry for _, stateBlockNID := range stateBlockNIDList.StateBlockNIDs { entries, ok := stateEntriesMap.lookup(stateBlockNID) if !ok { // This should only get hit if the database is corrupt. // It should be impossible for an event to reference a NID that doesn't exist panic(fmt.Errorf("corrupt DB: Missing state block numeric ID %d", stateBlockNID)) } fullState = append(fullState, entries...) } // Stable sort so that the most recent entry for each state key stays // remains later in the list than the older entries for the same state key. sort.Stable(stateEntryByStateKeySorter(fullState)) // Unique returns the last entry and hence the most recent entry for each state key. fullState = fullState[:util.Unique(stateEntryByStateKeySorter(fullState))] return fullState, nil } type stateEntryListMap []types.StateEntryList func (m stateEntryListMap) lookup(stateBlockNID types.StateBlockNID) (stateEntries []types.StateEntry, ok bool) { list := []types.StateEntryList(m) i := sort.Search(len(list), func(i int) bool { return list[i].StateBlockNID >= stateBlockNID }) if i < len(list) && list[i].StateBlockNID == stateBlockNID { ok = true stateEntries = list[i].StateEntries } return } type stateEntryByStateKeySorter []types.StateEntry func (s stateEntryByStateKeySorter) Len() int { return len(s) } func (s stateEntryByStateKeySorter) Less(i, j int) bool { return s[i].StateKeyTuple.LessThan(s[j].StateKeyTuple) } func (s stateEntryByStateKeySorter) Swap(i, j int) { s[i], s[j] = s[j], s[i] }