mirror of
https://github.com/1f349/dendrite.git
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a06c18bb56
* Initial work on soft-fail * Fix state block retrieval * Copy-pasta QueryLatestEventsAndState code * Fix state lookup * Clean up * Fix up failing sytest * Linting * Update previous events SQLite insert query * Update SQLite InsertPreviousEvent properly * Hopefully fix the event references updates Co-authored-by: Kegan Dougal <kegan@matrix.org>
329 lines
11 KiB
Go
329 lines
11 KiB
Go
// Copyright 2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package api
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import (
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"context"
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"fmt"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/util"
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)
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// SendEvents to the roomserver The events are written with KindNew.
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func SendEvents(
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ctx context.Context, rsAPI RoomserverInternalAPI, events []gomatrixserverlib.HeaderedEvent,
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sendAsServer gomatrixserverlib.ServerName, txnID *TransactionID,
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) error {
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ires := make([]InputRoomEvent, len(events))
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for i, event := range events {
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ires[i] = InputRoomEvent{
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Kind: KindNew,
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Event: event,
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AuthEventIDs: event.AuthEventIDs(),
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SendAsServer: string(sendAsServer),
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TransactionID: txnID,
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}
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}
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return SendInputRoomEvents(ctx, rsAPI, ires)
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}
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// SendEventWithState writes an event with KindNew to the roomserver
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// with the state at the event as KindOutlier before it. Will not send any event that is
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// marked as `true` in haveEventIDs
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func SendEventWithState(
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ctx context.Context, rsAPI RoomserverInternalAPI, state *gomatrixserverlib.RespState,
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event gomatrixserverlib.HeaderedEvent, haveEventIDs map[string]bool,
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) error {
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outliers, err := state.Events()
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if err != nil {
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return err
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}
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var ires []InputRoomEvent
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for _, outlier := range outliers {
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if haveEventIDs[outlier.EventID()] {
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continue
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}
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ires = append(ires, InputRoomEvent{
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Kind: KindOutlier,
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Event: outlier.Headered(event.RoomVersion),
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AuthEventIDs: outlier.AuthEventIDs(),
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})
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}
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stateEventIDs := make([]string, len(state.StateEvents))
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for i := range state.StateEvents {
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stateEventIDs[i] = state.StateEvents[i].EventID()
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}
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ires = append(ires, InputRoomEvent{
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Kind: KindNew,
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Event: event,
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AuthEventIDs: event.AuthEventIDs(),
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HasState: true,
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StateEventIDs: stateEventIDs,
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})
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return SendInputRoomEvents(ctx, rsAPI, ires)
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}
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// SendEventWithRewrite writes an event with KindNew to the roomserver along
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// with a number of rewrite and outlier events for state and auth events
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// respectively.
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func SendEventWithRewrite(
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ctx context.Context, rsAPI RoomserverInternalAPI, state *gomatrixserverlib.RespState,
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event gomatrixserverlib.HeaderedEvent, haveEventIDs map[string]bool,
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) error {
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isCurrentState := map[string]struct{}{}
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for _, se := range state.StateEvents {
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isCurrentState[se.EventID()] = struct{}{}
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}
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authAndStateEvents, err := state.Events()
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if err != nil {
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return err
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}
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var ires []InputRoomEvent
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var stateIDs []string
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// This function generates three things:
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// A - A set of "rewrite" events, which will form the newly rewritten
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// state before the event, which includes every rewrite event that
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// came before it in its state
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// B - A set of "outlier" events, which are auth events but not part
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// of the rewritten state
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// C - A "new" event, which include all of the rewrite events in its
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// state
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for _, authOrStateEvent := range authAndStateEvents {
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if authOrStateEvent.StateKey() == nil {
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continue
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}
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if haveEventIDs[authOrStateEvent.EventID()] {
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continue
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}
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if event.StateKey() == nil {
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continue
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}
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// We will handle an event as if it's an outlier if one of the
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// following conditions is true:
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storeAsOutlier := false
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if _, ok := isCurrentState[authOrStateEvent.EventID()]; !ok {
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// The event is an auth event and isn't a part of the state set.
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// We'll send it as an outlier because we need it to be stored
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// in case something is referring to it as an auth event.
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storeAsOutlier = true
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}
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if storeAsOutlier {
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ires = append(ires, InputRoomEvent{
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Kind: KindOutlier,
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Event: authOrStateEvent.Headered(event.RoomVersion),
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AuthEventIDs: authOrStateEvent.AuthEventIDs(),
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})
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continue
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}
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// If the event isn't an outlier then we'll instead send it as a
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// rewrite event, so that it'll form part of the rewritten state.
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// These events will go through the membership and latest event
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// updaters and we will generate output events, but they will be
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// flagged as non-current (i.e. didn't just happen) events.
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// Each of these rewrite events includes all of the rewrite events
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// that came before in their StateEventIDs.
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ires = append(ires, InputRoomEvent{
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Kind: KindRewrite,
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Event: authOrStateEvent.Headered(event.RoomVersion),
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AuthEventIDs: authOrStateEvent.AuthEventIDs(),
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HasState: true,
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StateEventIDs: stateIDs,
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})
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// Add the event ID into the StateEventIDs of all subsequent
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// rewrite events, and the new event.
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stateIDs = append(stateIDs, authOrStateEvent.EventID())
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}
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// Send the final event as a new event, which will generate
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// a timeline output event for it. All of the rewrite events
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// that came before will be sent as StateEventIDs, forming a
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// new clean state before the event.
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ires = append(ires, InputRoomEvent{
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Kind: KindNew,
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Event: event,
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AuthEventIDs: event.AuthEventIDs(),
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HasState: true,
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StateEventIDs: stateIDs,
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})
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return SendInputRoomEvents(ctx, rsAPI, ires)
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}
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// SendInputRoomEvents to the roomserver.
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func SendInputRoomEvents(
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ctx context.Context, rsAPI RoomserverInternalAPI, ires []InputRoomEvent,
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) error {
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request := InputRoomEventsRequest{InputRoomEvents: ires}
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var response InputRoomEventsResponse
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rsAPI.InputRoomEvents(ctx, &request, &response)
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return response.Err()
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}
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// SendInvite event to the roomserver.
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// This should only be needed for invite events that occur outside of a known room.
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// If we are in the room then the event should be sent using the SendEvents method.
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func SendInvite(
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ctx context.Context,
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rsAPI RoomserverInternalAPI, inviteEvent gomatrixserverlib.HeaderedEvent,
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inviteRoomState []gomatrixserverlib.InviteV2StrippedState,
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sendAsServer gomatrixserverlib.ServerName, txnID *TransactionID,
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) error {
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// Start by sending the invite request into the roomserver. This will
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// trigger the federation request amongst other things if needed.
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request := &PerformInviteRequest{
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Event: inviteEvent,
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InviteRoomState: inviteRoomState,
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RoomVersion: inviteEvent.RoomVersion,
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SendAsServer: string(sendAsServer),
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TransactionID: txnID,
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}
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response := &PerformInviteResponse{}
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if err := rsAPI.PerformInvite(ctx, request, response); err != nil {
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return fmt.Errorf("rsAPI.PerformInvite: %w", err)
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}
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if response.Error != nil {
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return response.Error
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}
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return nil
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}
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// GetEvent returns the event or nil, even on errors.
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func GetEvent(ctx context.Context, rsAPI RoomserverInternalAPI, eventID string) *gomatrixserverlib.HeaderedEvent {
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var res QueryEventsByIDResponse
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err := rsAPI.QueryEventsByID(ctx, &QueryEventsByIDRequest{
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EventIDs: []string{eventID},
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}, &res)
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if err != nil {
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util.GetLogger(ctx).WithError(err).Error("Failed to QueryEventsByID")
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return nil
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}
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if len(res.Events) != 1 {
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return nil
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}
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return &res.Events[0]
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}
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// GetStateEvent returns the current state event in the room or nil.
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func GetStateEvent(ctx context.Context, rsAPI RoomserverInternalAPI, roomID string, tuple gomatrixserverlib.StateKeyTuple) *gomatrixserverlib.HeaderedEvent {
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var res QueryCurrentStateResponse
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err := rsAPI.QueryCurrentState(ctx, &QueryCurrentStateRequest{
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RoomID: roomID,
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StateTuples: []gomatrixserverlib.StateKeyTuple{tuple},
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}, &res)
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if err != nil {
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util.GetLogger(ctx).WithError(err).Error("Failed to QueryCurrentState")
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return nil
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}
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ev, ok := res.StateEvents[tuple]
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if ok {
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return ev
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}
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return nil
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}
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// IsServerBannedFromRoom returns whether the server is banned from a room by server ACLs.
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func IsServerBannedFromRoom(ctx context.Context, rsAPI RoomserverInternalAPI, roomID string, serverName gomatrixserverlib.ServerName) bool {
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req := &QueryServerBannedFromRoomRequest{
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ServerName: serverName,
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RoomID: roomID,
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}
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res := &QueryServerBannedFromRoomResponse{}
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if err := rsAPI.QueryServerBannedFromRoom(ctx, req, res); err != nil {
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util.GetLogger(ctx).WithError(err).Error("Failed to QueryServerBannedFromRoom")
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return true
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}
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return res.Banned
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}
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// PopulatePublicRooms extracts PublicRoom information for all the provided room IDs. The IDs are not checked to see if they are visible in the
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// published room directory.
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// due to lots of switches
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// nolint:gocyclo
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func PopulatePublicRooms(ctx context.Context, roomIDs []string, rsAPI RoomserverInternalAPI) ([]gomatrixserverlib.PublicRoom, error) {
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avatarTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.avatar", StateKey: ""}
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nameTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.name", StateKey: ""}
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canonicalTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomCanonicalAlias, StateKey: ""}
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topicTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.topic", StateKey: ""}
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guestTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.guest_access", StateKey: ""}
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visibilityTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomHistoryVisibility, StateKey: ""}
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joinRuleTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomJoinRules, StateKey: ""}
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var stateRes QueryBulkStateContentResponse
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err := rsAPI.QueryBulkStateContent(ctx, &QueryBulkStateContentRequest{
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RoomIDs: roomIDs,
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AllowWildcards: true,
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StateTuples: []gomatrixserverlib.StateKeyTuple{
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nameTuple, canonicalTuple, topicTuple, guestTuple, visibilityTuple, joinRuleTuple, avatarTuple,
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{EventType: gomatrixserverlib.MRoomMember, StateKey: "*"},
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},
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}, &stateRes)
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if err != nil {
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util.GetLogger(ctx).WithError(err).Error("QueryBulkStateContent failed")
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return nil, err
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}
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chunk := make([]gomatrixserverlib.PublicRoom, len(roomIDs))
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i := 0
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for roomID, data := range stateRes.Rooms {
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pub := gomatrixserverlib.PublicRoom{
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RoomID: roomID,
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}
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joinCount := 0
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var joinRule, guestAccess string
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for tuple, contentVal := range data {
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if tuple.EventType == gomatrixserverlib.MRoomMember && contentVal == "join" {
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joinCount++
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continue
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}
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switch tuple {
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case avatarTuple:
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pub.AvatarURL = contentVal
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case nameTuple:
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pub.Name = contentVal
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case topicTuple:
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pub.Topic = contentVal
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case canonicalTuple:
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pub.CanonicalAlias = contentVal
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case visibilityTuple:
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pub.WorldReadable = contentVal == "world_readable"
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// need both of these to determine whether guests can join
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case joinRuleTuple:
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joinRule = contentVal
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case guestTuple:
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guestAccess = contentVal
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}
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}
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if joinRule == gomatrixserverlib.Public && guestAccess == "can_join" {
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pub.GuestCanJoin = true
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}
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pub.JoinedMembersCount = joinCount
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chunk[i] = pub
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i++
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}
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return chunk, nil
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}
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