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// Copyright 2020 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"
"fmt"
federationAPI "github.com/matrix-org/dendrite/federationapi/api"
"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/state"
"github.com/matrix-org/dendrite/roomserver/storage"
"github.com/matrix-org/dendrite/roomserver/storage/shared"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/matrix-org/util"
)
type QueryState struct {
storage.Database
}
func (q *QueryState) GetAuthEvents(ctx context.Context, event gomatrixserverlib.PDU) (gomatrixserverlib.AuthEventProvider, error) {
return helpers.GetAuthEvents(ctx, q.Database, event.Version(), event, event.AuthEventIDs())
}
func (q *QueryState) GetState(ctx context.Context, roomID spec.RoomID, stateWanted []gomatrixserverlib.StateKeyTuple) ([]gomatrixserverlib.PDU, error) {
info, err := q.Database.RoomInfo(ctx, roomID.String())
if err != nil {
return nil, fmt.Errorf("failed to load RoomInfo: %w", err)
}
if info != nil {
roomState := state.NewStateResolution(q.Database, info)
stateEntries, err := roomState.LoadStateAtSnapshotForStringTuples(
ctx, info.StateSnapshotNID(), stateWanted,
)
if err != nil {
return nil, nil
}
stateNIDs := []types.EventNID{}
for _, stateNID := range stateEntries {
stateNIDs = append(stateNIDs, stateNID.EventNID)
}
stateEvents, err := q.Database.Events(ctx, info.RoomVersion, stateNIDs)
if err != nil {
return nil, fmt.Errorf("failed to obtain required events: %w", err)
}
events := []gomatrixserverlib.PDU{}
for _, event := range stateEvents {
events = append(events, event.PDU)
}
return events, nil
}
return nil, nil
}
type Inviter struct {
DB storage.Database
Cfg *config.RoomServer
FSAPI federationAPI.RoomserverFederationAPI
RSAPI api.RoomserverInternalAPI
Inputer *input.Inputer
}
func (r *Inviter) IsKnownRoom(ctx context.Context, roomID spec.RoomID) (bool, error) {
info, err := r.DB.RoomInfo(ctx, roomID.String())
if err != nil {
return false, fmt.Errorf("failed to load RoomInfo: %w", err)
}
return (info != nil && !info.IsStub()), nil
}
func (r *Inviter) StateQuerier() gomatrixserverlib.StateQuerier {
return &QueryState{Database: r.DB}
}
func (r *Inviter) ProcessInviteMembership(
ctx context.Context, inviteEvent *types.HeaderedEvent,
) ([]api.OutputEvent, error) {
var outputUpdates []api.OutputEvent
var updater *shared.MembershipUpdater
userID, err := r.RSAPI.QueryUserIDForSender(ctx, inviteEvent.RoomID(), spec.SenderID(*inviteEvent.StateKey()))
if err != nil {
return nil, api.ErrInvalidID{Err: fmt.Errorf("the user ID %s is invalid", *inviteEvent.StateKey())}
}
isTargetLocal := r.Cfg.Matrix.IsLocalServerName(userID.Domain())
if updater, err = r.DB.MembershipUpdater(ctx, inviteEvent.RoomID(), *inviteEvent.StateKey(), isTargetLocal, inviteEvent.Version()); err != nil {
return nil, fmt.Errorf("r.DB.MembershipUpdater: %w", err)
}
outputUpdates, err = helpers.UpdateToInviteMembership(updater, &types.Event{
EventNID: 0,
PDU: inviteEvent.PDU,
}, outputUpdates, inviteEvent.Version())
if err != nil {
return nil, fmt.Errorf("updateToInviteMembership: %w", err)
}
if err = updater.Commit(); err != nil {
return nil, fmt.Errorf("updater.Commit: %w", err)
}
return outputUpdates, nil
}
// nolint:gocyclo
func (r *Inviter) PerformInvite(
ctx context.Context,
req *api.PerformInviteRequest,
) error {
event := req.Event
sender, err := r.DB.GetUserIDForSender(ctx, event.RoomID(), event.SenderID())
if err != nil {
return spec.InvalidParam("The sender user ID is invalid")
}
if !r.Cfg.Matrix.IsLocalServerName(sender.Domain()) {
return api.ErrInvalidID{Err: fmt.Errorf("the invite must be from a local user")}
}
if event.StateKey() == nil {
return fmt.Errorf("invite must be a state event")
}
invitedUser, err := spec.NewUserID(*event.StateKey(), true)
if err != nil {
return spec.InvalidParam("The user ID is invalid")
}
isTargetLocal := r.Cfg.Matrix.IsLocalServerName(invitedUser.Domain())
validRoomID, err := spec.NewRoomID(event.RoomID())
if err != nil {
return err
}
invitedSenderID, err := r.RSAPI.QuerySenderIDForUser(ctx, event.RoomID(), *invitedUser)
if err != nil {
return fmt.Errorf("failed looking up senderID for invited user")
}
input := gomatrixserverlib.PerformInviteInput{
RoomID: *validRoomID,
InviteEvent: event.PDU,
InvitedUser: *invitedUser,
InvitedSenderID: invitedSenderID,
IsTargetLocal: isTargetLocal,
StrippedState: req.InviteRoomState,
MembershipQuerier: &api.MembershipQuerier{Roomserver: r.RSAPI},
StateQuerier: &QueryState{r.DB},
UserIDQuerier: func(roomID string, senderID spec.SenderID) (*spec.UserID, error) {
return r.DB.GetUserIDForSender(ctx, roomID, senderID)
},
}
inviteEvent, err := gomatrixserverlib.PerformInvite(ctx, input, r.FSAPI)
if err != nil {
switch e := err.(type) {
case spec.MatrixError:
if e.ErrCode == spec.ErrorForbidden {
return api.ErrNotAllowed{Err: fmt.Errorf("%s", e.Err)}
}
}
return err
}
// Use the returned event if there was one (due to federation), otherwise
// send the original invite event to the roomserver.
if inviteEvent == nil {
inviteEvent = event
}
// Send the invite event to the roomserver input stream. This will
// notify existing users in the room about the invite, update the
// membership table and ensure that the event is ready and available
// to use as an auth event when accepting the invite.
// It will NOT notify the invitee of this invite.
inputReq := &api.InputRoomEventsRequest{
InputRoomEvents: []api.InputRoomEvent{
{
Kind: api.KindNew,
Event: &types.HeaderedEvent{PDU: inviteEvent},
Origin: sender.Domain(),
SendAsServer: req.SendAsServer,
},
},
}
inputRes := &api.InputRoomEventsResponse{}
r.Inputer.InputRoomEvents(context.Background(), inputReq, inputRes)
if err := inputRes.Err(); err != nil {
util.GetLogger(ctx).WithField("event_id", event.EventID()).Error("r.InputRoomEvents failed")
return api.ErrNotAllowed{Err: err}
}
return nil
}
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