130 lines
4.0 KiB
Go
130 lines
4.0 KiB
Go
// Copyright 2020 New Vector Ltd
|
|
//
|
|
// 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 perform
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/matrix-org/dendrite/roomserver/api"
|
|
"github.com/matrix-org/dendrite/roomserver/internal/helpers"
|
|
"github.com/matrix-org/dendrite/roomserver/internal/input"
|
|
"github.com/matrix-org/dendrite/roomserver/internal/query"
|
|
"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/gomatrixserverlib"
|
|
"github.com/matrix-org/util"
|
|
)
|
|
|
|
type InboundPeeker struct {
|
|
DB storage.Database
|
|
Inputer *input.Inputer
|
|
}
|
|
|
|
// PerformInboundPeek handles peeking into matrix rooms, including over
|
|
// federation by talking to the federationsender. called when a remote server
|
|
// initiates a /peek over federation.
|
|
//
|
|
// It should atomically figure out the current state of the room (for the
|
|
// response to /peek) while adding the new inbound peek to the kafka stream so the
|
|
// fed sender can start sending peeked events without a race between the state
|
|
// snapshot and the stream of peeked events.
|
|
func (r *InboundPeeker) PerformInboundPeek(
|
|
ctx context.Context,
|
|
request *api.PerformInboundPeekRequest,
|
|
response *api.PerformInboundPeekResponse,
|
|
) 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
|
|
|
|
var stateEvents []*gomatrixserverlib.Event
|
|
|
|
var currentStateSnapshotNID types.StateSnapshotNID
|
|
latestEventRefs, currentStateSnapshotNID, _, err :=
|
|
r.DB.LatestEventIDs(ctx, info.RoomNID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
latestEvents, err := r.DB.EventsFromIDs(ctx, []string{latestEventRefs[0].EventID})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
var sortedLatestEvents []*gomatrixserverlib.Event
|
|
for _, ev := range latestEvents {
|
|
sortedLatestEvents = append(sortedLatestEvents, ev.Event)
|
|
}
|
|
sortedLatestEvents = gomatrixserverlib.ReverseTopologicalOrdering(
|
|
sortedLatestEvents,
|
|
gomatrixserverlib.TopologicalOrderByPrevEvents,
|
|
)
|
|
response.LatestEvent = sortedLatestEvents[0].Headered(info.RoomVersion)
|
|
|
|
// XXX: do we actually need to do a state resolution here?
|
|
roomState := state.NewStateResolution(r.DB, *info)
|
|
|
|
var stateEntries []types.StateEntry
|
|
stateEntries, err = roomState.LoadStateAtSnapshot(
|
|
ctx, currentStateSnapshotNID,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
stateEvents, err = helpers.LoadStateEvents(ctx, r.DB, stateEntries)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// get the auth event IDs for the current state events
|
|
var authEventIDs []string
|
|
for _, se := range stateEvents {
|
|
authEventIDs = append(authEventIDs, se.AuthEventIDs()...)
|
|
}
|
|
authEventIDs = util.UniqueStrings(authEventIDs) // de-dupe
|
|
|
|
authEvents, err := query.GetAuthChain(ctx, r.DB.EventsFromIDs, authEventIDs)
|
|
if 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))
|
|
}
|
|
|
|
err = r.Inputer.WriteOutputEvents(request.RoomID, []api.OutputEvent{
|
|
{
|
|
Type: api.OutputTypeNewInboundPeek,
|
|
NewInboundPeek: &api.OutputNewInboundPeek{
|
|
RoomID: request.RoomID,
|
|
PeekID: request.PeekID,
|
|
LatestEventID: latestEvents[0].EventID(),
|
|
ServerName: request.ServerName,
|
|
RenewalInterval: request.RenewalInterval,
|
|
},
|
|
},
|
|
})
|
|
return err
|
|
}
|