dendrite/common/events.go
Neil Alexander 05e1ae8745
Further room version wiring (#936)
* Room version 2 by default, other wiring updates, update gomatrixserverlib

* Fix nil pointer exception

* Fix some more nil pointer exceptions hopefully

* Update gomatrixserverlib

* Send all room versions when joining, not just stable ones

* Remove room version cquery

* Get room version when getting events from the roomserver database

* Reset default back to room version 2

* Don't generate event IDs unless needed

* Revert "Remove room version cquery"

This reverts commit a170d5873360dd059614460acc8b21ab2cda9767.

* Query room version in federation API, client API as needed

* Improvements to make_join send_join dance

* Make room server producers use headered events

* Lint tweaks

* Update gomatrixserverlib

* Versioned SendJoin

* Query room version in syncapi backfill

* Handle transaction marshalling/unmarshalling within Dendrite

* Sorta fix federation (kinda)

* whoops commit federation API too

* Use NewEventFromTrustedJSON when getting events from the database

* Update gomatrixserverlib

* Strip headers on federationapi endpoints

* Fix bug in clientapi profile room version query

* Update gomatrixserverlib

* Return more useful error if room version query doesn't find the room

* Update gomatrixserverlib

* Update gomatrixserverlib

* Maybe fix federation

* Fix formatting directive

* Update sytest whitelist and blacklist

* Temporarily disable room versions 3 and 4 until gmsl is fixed

* Fix count of EDUs in logging

* Update gomatrixserverlib

* Update gomatrixserverlib

* Update gomatrixserverlib

* Rely on EventBuilder in gmsl to generate the event IDs for us

* Some review comments fixed

* Move function out of common and into gmsl

* Comment in federationsender destinationqueue

* Update gomatrixserverlib
2020-03-27 16:28:22 +00:00

127 lines
3.5 KiB
Go

// Copyright 2017 Vector Creations 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 common
import (
"context"
"errors"
"time"
"github.com/matrix-org/dendrite/common/config"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/gomatrixserverlib"
)
// ErrRoomNoExists is returned when trying to lookup the state of a room that
// doesn't exist
var ErrRoomNoExists = errors.New("Room does not exist")
// BuildEvent builds a Matrix event using the event builder and roomserver query
// API client provided. If also fills roomserver query API response (if provided)
// in case the function calling FillBuilder needs to use it.
// Returns ErrRoomNoExists if the state of the room could not be retrieved because
// the room doesn't exist
// Returns an error if something else went wrong
func BuildEvent(
ctx context.Context,
builder *gomatrixserverlib.EventBuilder, cfg *config.Dendrite, evTime time.Time,
queryAPI api.RoomserverQueryAPI, queryRes *api.QueryLatestEventsAndStateResponse,
) (*gomatrixserverlib.Event, error) {
if queryRes == nil {
queryRes = &api.QueryLatestEventsAndStateResponse{}
}
err := AddPrevEventsToEvent(ctx, builder, queryAPI, queryRes)
if err != nil {
return nil, err
}
event, err := builder.Build(
evTime, cfg.Matrix.ServerName, cfg.Matrix.KeyID,
cfg.Matrix.PrivateKey, queryRes.RoomVersion,
)
if err != nil {
return nil, err
}
return &event, nil
}
// AddPrevEventsToEvent fills out the prev_events and auth_events fields in builder
func AddPrevEventsToEvent(
ctx context.Context,
builder *gomatrixserverlib.EventBuilder,
queryAPI api.RoomserverQueryAPI, queryRes *api.QueryLatestEventsAndStateResponse,
) error {
eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
if err != nil {
return err
}
// Ask the roomserver for information about this room
queryReq := api.QueryLatestEventsAndStateRequest{
RoomID: builder.RoomID,
StateToFetch: eventsNeeded.Tuples(),
}
if err = queryAPI.QueryLatestEventsAndState(ctx, &queryReq, queryRes); err != nil {
return err
}
if !queryRes.RoomExists {
return ErrRoomNoExists
}
eventFormat, err := queryRes.RoomVersion.EventFormat()
if err != nil {
return err
}
builder.Depth = queryRes.Depth
authEvents := gomatrixserverlib.NewAuthEvents(nil)
for i := range queryRes.StateEvents {
err = authEvents.AddEvent(&queryRes.StateEvents[i].Event)
if err != nil {
return err
}
}
refs, err := eventsNeeded.AuthEventReferences(&authEvents)
if err != nil {
return err
}
switch eventFormat {
case gomatrixserverlib.EventFormatV1:
builder.AuthEvents = refs
builder.PrevEvents = queryRes.LatestEvents
case gomatrixserverlib.EventFormatV2:
v2AuthRefs := []string{}
v2PrevRefs := []string{}
for _, ref := range refs {
v2AuthRefs = append(v2AuthRefs, ref.EventID)
}
for _, ref := range queryRes.LatestEvents {
v2PrevRefs = append(v2PrevRefs, ref.EventID)
}
builder.AuthEvents = v2AuthRefs
builder.PrevEvents = v2PrevRefs
}
return nil
}