package main import ( "context" "flag" "fmt" "sort" "strconv" "strings" "time" "github.com/matrix-org/dendrite/internal/caching" "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/setup" "github.com/matrix-org/dendrite/setup/base" "github.com/matrix-org/dendrite/setup/config" "github.com/matrix-org/gomatrixserverlib" ) // This is a utility for inspecting state snapshots and running state resolution // against real snapshots in an actual database. // It takes one or more state snapshot NIDs as arguments, along with a room version // to use for unmarshalling events, and will produce resolved output. // // Usage: ./resolve-state --roomversion=version snapshot [snapshot ...] // e.g. ./resolve-state --roomversion=5 1254 1235 1282 var roomVersion = flag.String("roomversion", "5", "the room version to parse events as") var filterType = flag.String("filtertype", "", "the event types to filter on") var difference = flag.Bool("difference", false, "whether to calculate the difference between snapshots") // nolint:gocyclo func main() { ctx := context.Background() cfg := setup.ParseFlags(true) cfg.Logging = append(cfg.Logging[:0], config.LogrusHook{ Type: "std", Level: "error", }) cfg.ClientAPI.RegistrationDisabled = true base := base.NewBaseDendrite(cfg, base.DisableMetrics) args := flag.Args() fmt.Println("Room version", *roomVersion) snapshotNIDs := []types.StateSnapshotNID{} for _, arg := range args { if i, err := strconv.Atoi(arg); err == nil { snapshotNIDs = append(snapshotNIDs, types.StateSnapshotNID(i)) } } fmt.Println("Fetching", len(snapshotNIDs), "snapshot NIDs") roomserverDB, err := storage.Open( base, &cfg.RoomServer.Database, caching.NewRistrettoCache(128*1024*1024, time.Hour, true), ) if err != nil { panic(err) } stateres := state.NewStateResolution(roomserverDB, &types.RoomInfo{ RoomVersion: gomatrixserverlib.RoomVersion(*roomVersion), }) if *difference { if len(snapshotNIDs) != 2 { panic("need exactly two state snapshot NIDs to calculate difference") } var removed, added []types.StateEntry removed, added, err = stateres.DifferenceBetweeenStateSnapshots(ctx, snapshotNIDs[0], snapshotNIDs[1]) if err != nil { panic(err) } eventNIDMap := map[types.EventNID]struct{}{} for _, entry := range append(removed, added...) { eventNIDMap[entry.EventNID] = struct{}{} } eventNIDs := make([]types.EventNID, 0, len(eventNIDMap)) for eventNID := range eventNIDMap { eventNIDs = append(eventNIDs, eventNID) } var eventEntries []types.Event eventEntries, err = roomserverDB.Events(ctx, 0, eventNIDs) if err != nil { panic(err) } events := make(map[types.EventNID]*gomatrixserverlib.Event, len(eventEntries)) for _, entry := range eventEntries { events[entry.EventNID] = entry.Event } if len(removed) > 0 { fmt.Println("Removed:") for _, r := range removed { event := events[r.EventNID] fmt.Println() fmt.Printf("* %s %s %q\n", event.EventID(), event.Type(), *event.StateKey()) fmt.Printf(" %s\n", string(event.Content())) } } if len(removed) > 0 && len(added) > 0 { fmt.Println() } if len(added) > 0 { fmt.Println("Added:") for _, a := range added { event := events[a.EventNID] fmt.Println() fmt.Printf("* %s %s %q\n", event.EventID(), event.Type(), *event.StateKey()) fmt.Printf(" %s\n", string(event.Content())) } } return } var stateEntries []types.StateEntry for _, snapshotNID := range snapshotNIDs { var entries []types.StateEntry entries, err = stateres.LoadStateAtSnapshot(ctx, snapshotNID) if err != nil { panic(err) } stateEntries = append(stateEntries, entries...) } eventNIDMap := map[types.EventNID]struct{}{} for _, entry := range stateEntries { eventNIDMap[entry.EventNID] = struct{}{} } eventNIDs := make([]types.EventNID, 0, len(eventNIDMap)) for eventNID := range eventNIDMap { eventNIDs = append(eventNIDs, eventNID) } fmt.Println("Fetching", len(eventNIDMap), "state events") eventEntries, err := roomserverDB.Events(ctx, 0, eventNIDs) if err != nil { panic(err) } authEventIDMap := make(map[string]struct{}) events := make([]*gomatrixserverlib.Event, len(eventEntries)) for i := range eventEntries { events[i] = eventEntries[i].Event for _, authEventID := range eventEntries[i].AuthEventIDs() { authEventIDMap[authEventID] = struct{}{} } } authEventIDs := make([]string, 0, len(authEventIDMap)) for authEventID := range authEventIDMap { authEventIDs = append(authEventIDs, authEventID) } fmt.Println("Fetching", len(authEventIDs), "auth events") authEventEntries, err := roomserverDB.EventsFromIDs(ctx, 0, authEventIDs) if err != nil { panic(err) } authEvents := make([]*gomatrixserverlib.Event, len(authEventEntries)) for i := range authEventEntries { authEvents[i] = authEventEntries[i].Event } fmt.Println("Resolving state") var resolved Events resolved, err = gomatrixserverlib.ResolveConflicts( gomatrixserverlib.RoomVersion(*roomVersion), events, authEvents, ) if err != nil { panic(err) } fmt.Println("Resolved state contains", len(resolved), "events") sort.Sort(resolved) filteringEventType := *filterType count := 0 for _, event := range resolved { if filteringEventType != "" && event.Type() != filteringEventType { continue } count++ fmt.Println() fmt.Printf("* %s %s %q\n", event.EventID(), event.Type(), *event.StateKey()) fmt.Printf(" %s\n", string(event.Content())) } fmt.Println() fmt.Println("Returned", count, "state events after filtering") } type Events []*gomatrixserverlib.Event func (e Events) Len() int { return len(e) } func (e Events) Swap(i, j int) { e[i], e[j] = e[j], e[i] } func (e Events) Less(i, j int) bool { typeDelta := strings.Compare(e[i].Type(), e[j].Type()) if typeDelta < 0 { return true } if typeDelta > 0 { return false } stateKeyDelta := strings.Compare(*e[i].StateKey(), *e[j].StateKey()) return stateKeyDelta < 0 }