dendrite/roomserver/internal/perform/perform_create_room.go
devonh ea6b368ad4
Move Invite logic to GMSL (#3086)
This is both the federation receiving & sending side logic (which were
previously entangeld in a single function)
2023-05-31 16:33:49 +00:00

499 lines
15 KiB
Go

// Copyright 2023 The Matrix.org Foundation C.I.C.
//
// 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"
"encoding/json"
"fmt"
"net/http"
"github.com/getsentry/sentry-go"
"github.com/matrix-org/dendrite/internal/eventutil"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/storage"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/gomatrixserverlib/fclient"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/matrix-org/util"
)
const (
historyVisibilityShared = "shared"
)
type Creator struct {
DB storage.Database
Cfg *config.RoomServer
RSAPI api.RoomserverInternalAPI
}
// PerformCreateRoom handles all the steps necessary to create a new room.
// nolint: gocyclo
func (c *Creator) PerformCreateRoom(ctx context.Context, userID spec.UserID, roomID spec.RoomID, createRequest *api.PerformCreateRoomRequest) (string, *util.JSONResponse) {
verImpl, err := gomatrixserverlib.GetRoomVersion(createRequest.RoomVersion)
if err != nil {
return "", &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON("unknown room version"),
}
}
createContent := map[string]interface{}{}
if len(createRequest.CreationContent) > 0 {
if err = json.Unmarshal(createRequest.CreationContent, &createContent); err != nil {
util.GetLogger(ctx).WithError(err).Error("json.Unmarshal for creation_content failed")
return "", &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON("invalid create content"),
}
}
}
createContent["creator"] = userID.String()
createContent["room_version"] = createRequest.RoomVersion
powerLevelContent := eventutil.InitialPowerLevelsContent(userID.String())
joinRuleContent := gomatrixserverlib.JoinRuleContent{
JoinRule: spec.Invite,
}
historyVisibilityContent := gomatrixserverlib.HistoryVisibilityContent{
HistoryVisibility: historyVisibilityShared,
}
if createRequest.PowerLevelContentOverride != nil {
// Merge powerLevelContentOverride fields by unmarshalling it atop the defaults
err = json.Unmarshal(createRequest.PowerLevelContentOverride, &powerLevelContent)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("json.Unmarshal for power_level_content_override failed")
return "", &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.BadJSON("malformed power_level_content_override"),
}
}
}
var guestsCanJoin bool
switch createRequest.StatePreset {
case spec.PresetPrivateChat:
joinRuleContent.JoinRule = spec.Invite
historyVisibilityContent.HistoryVisibility = historyVisibilityShared
guestsCanJoin = true
case spec.PresetTrustedPrivateChat:
joinRuleContent.JoinRule = spec.Invite
historyVisibilityContent.HistoryVisibility = historyVisibilityShared
for _, invitee := range createRequest.InvitedUsers {
powerLevelContent.Users[invitee] = 100
}
guestsCanJoin = true
case spec.PresetPublicChat:
joinRuleContent.JoinRule = spec.Public
historyVisibilityContent.HistoryVisibility = historyVisibilityShared
}
createEvent := gomatrixserverlib.FledglingEvent{
Type: spec.MRoomCreate,
Content: createContent,
}
powerLevelEvent := gomatrixserverlib.FledglingEvent{
Type: spec.MRoomPowerLevels,
Content: powerLevelContent,
}
joinRuleEvent := gomatrixserverlib.FledglingEvent{
Type: spec.MRoomJoinRules,
Content: joinRuleContent,
}
historyVisibilityEvent := gomatrixserverlib.FledglingEvent{
Type: spec.MRoomHistoryVisibility,
Content: historyVisibilityContent,
}
membershipEvent := gomatrixserverlib.FledglingEvent{
Type: spec.MRoomMember,
StateKey: userID.String(),
Content: gomatrixserverlib.MemberContent{
Membership: spec.Join,
DisplayName: createRequest.UserDisplayName,
AvatarURL: createRequest.UserAvatarURL,
},
}
var nameEvent *gomatrixserverlib.FledglingEvent
var topicEvent *gomatrixserverlib.FledglingEvent
var guestAccessEvent *gomatrixserverlib.FledglingEvent
var aliasEvent *gomatrixserverlib.FledglingEvent
if createRequest.RoomName != "" {
nameEvent = &gomatrixserverlib.FledglingEvent{
Type: spec.MRoomName,
Content: eventutil.NameContent{
Name: createRequest.RoomName,
},
}
}
if createRequest.Topic != "" {
topicEvent = &gomatrixserverlib.FledglingEvent{
Type: spec.MRoomTopic,
Content: eventutil.TopicContent{
Topic: createRequest.Topic,
},
}
}
if guestsCanJoin {
guestAccessEvent = &gomatrixserverlib.FledglingEvent{
Type: spec.MRoomGuestAccess,
Content: eventutil.GuestAccessContent{
GuestAccess: "can_join",
},
}
}
var roomAlias string
if createRequest.RoomAliasName != "" {
roomAlias = fmt.Sprintf("#%s:%s", createRequest.RoomAliasName, userID.Domain())
// check it's free
// TODO: This races but is better than nothing
hasAliasReq := api.GetRoomIDForAliasRequest{
Alias: roomAlias,
IncludeAppservices: false,
}
var aliasResp api.GetRoomIDForAliasResponse
err = c.RSAPI.GetRoomIDForAlias(ctx, &hasAliasReq, &aliasResp)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("aliasAPI.GetRoomIDForAlias failed")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
if aliasResp.RoomID != "" {
return "", &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.RoomInUse("Room ID already exists."),
}
}
aliasEvent = &gomatrixserverlib.FledglingEvent{
Type: spec.MRoomCanonicalAlias,
Content: eventutil.CanonicalAlias{
Alias: roomAlias,
},
}
}
var initialStateEvents []gomatrixserverlib.FledglingEvent
for i := range createRequest.InitialState {
if createRequest.InitialState[i].StateKey != "" {
initialStateEvents = append(initialStateEvents, createRequest.InitialState[i])
continue
}
switch createRequest.InitialState[i].Type {
case spec.MRoomCreate:
continue
case spec.MRoomPowerLevels:
powerLevelEvent = createRequest.InitialState[i]
case spec.MRoomJoinRules:
joinRuleEvent = createRequest.InitialState[i]
case spec.MRoomHistoryVisibility:
historyVisibilityEvent = createRequest.InitialState[i]
case spec.MRoomGuestAccess:
guestAccessEvent = &createRequest.InitialState[i]
case spec.MRoomName:
nameEvent = &createRequest.InitialState[i]
case spec.MRoomTopic:
topicEvent = &createRequest.InitialState[i]
default:
initialStateEvents = append(initialStateEvents, createRequest.InitialState[i])
}
}
// send events into the room in order of:
// 1- m.room.create
// 2- room creator join member
// 3- m.room.power_levels
// 4- m.room.join_rules
// 5- m.room.history_visibility
// 6- m.room.canonical_alias (opt)
// 7- m.room.guest_access (opt)
// 8- other initial state items
// 9- m.room.name (opt)
// 10- m.room.topic (opt)
// 11- invite events (opt) - with is_direct flag if applicable TODO
// 12- 3pid invite events (opt) TODO
// This differs from Synapse slightly. Synapse would vary the ordering of 3-7
// depending on if those events were in "initial_state" or not. This made it
// harder to reason about, hence sticking to a strict static ordering.
// TODO: Synapse has txn/token ID on each event. Do we need to do this here?
eventsToMake := []gomatrixserverlib.FledglingEvent{
createEvent, membershipEvent, powerLevelEvent, joinRuleEvent, historyVisibilityEvent,
}
if guestAccessEvent != nil {
eventsToMake = append(eventsToMake, *guestAccessEvent)
}
eventsToMake = append(eventsToMake, initialStateEvents...)
if nameEvent != nil {
eventsToMake = append(eventsToMake, *nameEvent)
}
if topicEvent != nil {
eventsToMake = append(eventsToMake, *topicEvent)
}
if aliasEvent != nil {
// TODO: bit of a chicken and egg problem here as the alias doesn't exist and cannot until we have made the room.
// This means we might fail creating the alias but say the canonical alias is something that doesn't exist.
eventsToMake = append(eventsToMake, *aliasEvent)
}
// TODO: invite events
// TODO: 3pid invite events
var builtEvents []*types.HeaderedEvent
authEvents := gomatrixserverlib.NewAuthEvents(nil)
for i, e := range eventsToMake {
depth := i + 1 // depth starts at 1
builder := verImpl.NewEventBuilderFromProtoEvent(&gomatrixserverlib.ProtoEvent{
Sender: userID.String(),
RoomID: roomID.String(),
Type: e.Type,
StateKey: &e.StateKey,
Depth: int64(depth),
})
err = builder.SetContent(e.Content)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("builder.SetContent failed")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
if i > 0 {
builder.PrevEvents = []string{builtEvents[i-1].EventID()}
}
var ev gomatrixserverlib.PDU
if err = builder.AddAuthEvents(&authEvents); err != nil {
util.GetLogger(ctx).WithError(err).Error("AddAuthEvents failed")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
ev, err = builder.Build(createRequest.EventTime, userID.Domain(), createRequest.KeyID, createRequest.PrivateKey)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("buildEvent failed")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
if err = gomatrixserverlib.Allowed(ev, &authEvents); err != nil {
util.GetLogger(ctx).WithError(err).Error("gomatrixserverlib.Allowed failed")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
// Add the event to the list of auth events
builtEvents = append(builtEvents, &types.HeaderedEvent{PDU: ev})
err = authEvents.AddEvent(ev)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("authEvents.AddEvent failed")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
}
inputs := make([]api.InputRoomEvent, 0, len(builtEvents))
for _, event := range builtEvents {
inputs = append(inputs, api.InputRoomEvent{
Kind: api.KindNew,
Event: event,
Origin: userID.Domain(),
SendAsServer: api.DoNotSendToOtherServers,
})
}
if err = api.SendInputRoomEvents(ctx, c.RSAPI, userID.Domain(), inputs, false); err != nil {
util.GetLogger(ctx).WithError(err).Error("roomserverAPI.SendInputRoomEvents failed")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
// TODO(#269): Reserve room alias while we create the room. This stops us
// from creating the room but still failing due to the alias having already
// been taken.
if roomAlias != "" {
aliasReq := api.SetRoomAliasRequest{
Alias: roomAlias,
RoomID: roomID.String(),
UserID: userID.String(),
}
var aliasResp api.SetRoomAliasResponse
err = c.RSAPI.SetRoomAlias(ctx, &aliasReq, &aliasResp)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("aliasAPI.SetRoomAlias failed")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
if aliasResp.AliasExists {
return "", &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.RoomInUse("Room alias already exists."),
}
}
}
// If this is a direct message then we should invite the participants.
if len(createRequest.InvitedUsers) > 0 {
// Build some stripped state for the invite.
var globalStrippedState []gomatrixserverlib.InviteStrippedState
for _, event := range builtEvents {
// Chosen events from the spec:
// https://spec.matrix.org/v1.3/client-server-api/#stripped-state
switch event.Type() {
case spec.MRoomCreate:
fallthrough
case spec.MRoomName:
fallthrough
case spec.MRoomAvatar:
fallthrough
case spec.MRoomTopic:
fallthrough
case spec.MRoomCanonicalAlias:
fallthrough
case spec.MRoomEncryption:
fallthrough
case spec.MRoomMember:
fallthrough
case spec.MRoomJoinRules:
ev := event.PDU
globalStrippedState = append(
globalStrippedState,
gomatrixserverlib.NewInviteStrippedState(ev),
)
}
}
// Process the invites.
var inviteEvent *types.HeaderedEvent
for _, invitee := range createRequest.InvitedUsers {
proto := gomatrixserverlib.ProtoEvent{
Sender: userID.String(),
RoomID: roomID.String(),
Type: "m.room.member",
StateKey: &invitee,
}
content := gomatrixserverlib.MemberContent{
Membership: spec.Invite,
DisplayName: createRequest.UserDisplayName,
AvatarURL: createRequest.UserAvatarURL,
Reason: "",
IsDirect: createRequest.IsDirect,
}
if err = proto.SetContent(content); err != nil {
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
// Build the invite event.
identity := &fclient.SigningIdentity{
ServerName: userID.Domain(),
KeyID: createRequest.KeyID,
PrivateKey: createRequest.PrivateKey,
}
inviteEvent, err = eventutil.QueryAndBuildEvent(ctx, &proto, identity, createRequest.EventTime, c.RSAPI, nil)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("buildMembershipEvent failed")
continue
}
inviteStrippedState := append(
globalStrippedState,
gomatrixserverlib.NewInviteStrippedState(inviteEvent.PDU),
)
// Send the invite event to the roomserver.
event := inviteEvent
err = c.RSAPI.PerformInvite(ctx, &api.PerformInviteRequest{
Event: event,
InviteRoomState: inviteStrippedState,
RoomVersion: event.Version(),
SendAsServer: string(userID.Domain()),
})
switch e := err.(type) {
case api.ErrInvalidID:
return "", &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.Unknown(e.Error()),
}
case api.ErrNotAllowed:
return "", &util.JSONResponse{
Code: http.StatusForbidden,
JSON: spec.Forbidden(e.Error()),
}
case nil:
default:
util.GetLogger(ctx).WithError(err).Error("PerformInvite failed")
sentry.CaptureException(err)
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
}
}
if createRequest.Visibility == spec.Public {
// expose this room in the published room list
if err = c.RSAPI.PerformPublish(ctx, &api.PerformPublishRequest{
RoomID: roomID.String(),
Visibility: spec.Public,
}); err != nil {
util.GetLogger(ctx).WithError(err).Error("failed to publish room")
return "", &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
}
// TODO: visibility/presets/raw initial state
// TODO: Create room alias association
// Make sure this doesn't fall into an application service's namespace though!
return roomAlias, nil
}