123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
package main
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import (
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"context"
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"flag"
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"fmt"
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"os"
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"strconv"
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"github.com/matrix-org/dendrite/internal/caching"
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"github.com/matrix-org/dendrite/roomserver/storage"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/dendrite/setup"
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"github.com/matrix-org/gomatrixserverlib"
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)
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// This is a utility for inspecting state snapshots and running state resolution
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// against real snapshots in an actual database.
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// It takes one or more state snapshot NIDs as arguments, along with a room version
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// to use for unmarshalling events, and will produce resolved output.
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//
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// Usage: ./resolve-state --roomversion=version snapshot [snapshot ...]
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// e.g. ./resolve-state --roomversion=5 1254 1235 1282
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var roomVersion = flag.String("roomversion", "5", "the room version to parse events as")
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// nolint:gocyclo
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func main() {
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ctx := context.Background()
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cfg := setup.ParseFlags(true)
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args := os.Args[1:]
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fmt.Println("Room version", *roomVersion)
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snapshotNIDs := []types.StateSnapshotNID{}
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for _, arg := range args {
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if i, err := strconv.Atoi(arg); err == nil {
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snapshotNIDs = append(snapshotNIDs, types.StateSnapshotNID(i))
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}
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}
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fmt.Println("Fetching", len(snapshotNIDs), "snapshot NIDs")
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cache, err := caching.NewInMemoryLRUCache(true)
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if err != nil {
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panic(err)
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}
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roomserverDB, err := storage.Open(&cfg.RoomServer.Database, cache)
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if err != nil {
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panic(err)
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}
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blockNIDs, err := roomserverDB.StateBlockNIDs(ctx, snapshotNIDs)
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if err != nil {
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panic(err)
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}
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var stateEntries []types.StateEntryList
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for _, list := range blockNIDs {
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entries, err2 := roomserverDB.StateEntries(ctx, list.StateBlockNIDs)
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if err2 != nil {
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panic(err2)
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}
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stateEntries = append(stateEntries, entries...)
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}
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var eventNIDs []types.EventNID
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for _, entry := range stateEntries {
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for _, e := range entry.StateEntries {
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eventNIDs = append(eventNIDs, e.EventNID)
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}
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}
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fmt.Println("Fetching", len(eventNIDs), "state events")
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eventEntries, err := roomserverDB.Events(ctx, eventNIDs)
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if err != nil {
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panic(err)
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}
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authEventIDMap := make(map[string]struct{})
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events := make([]*gomatrixserverlib.Event, len(eventEntries))
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for i := range eventEntries {
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events[i] = eventEntries[i].Event
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for _, authEventID := range eventEntries[i].AuthEventIDs() {
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authEventIDMap[authEventID] = struct{}{}
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}
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}
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authEventIDs := make([]string, 0, len(authEventIDMap))
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for authEventID := range authEventIDMap {
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authEventIDs = append(authEventIDs, authEventID)
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}
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fmt.Println("Fetching", len(authEventIDs), "auth events")
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authEventEntries, err := roomserverDB.EventsFromIDs(ctx, authEventIDs)
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if err != nil {
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panic(err)
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}
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authEvents := make([]*gomatrixserverlib.Event, len(authEventEntries))
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for i := range authEventEntries {
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authEvents[i] = authEventEntries[i].Event
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}
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fmt.Println("Resolving state")
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resolved, err := gomatrixserverlib.ResolveConflicts(
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gomatrixserverlib.RoomVersion(*roomVersion),
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events,
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authEvents,
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)
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if err != nil {
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panic(err)
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}
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fmt.Println("Resolved state contains", len(resolved), "events")
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for _, event := range resolved {
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fmt.Println()
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fmt.Printf("* %s %s %q\n", event.EventID(), event.Type(), *event.StateKey())
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fmt.Printf(" %s\n", string(event.Content()))
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}
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}
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