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// 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"
"fmt"
"strings"
fsAPI "github.com/matrix-org/dendrite/federationapi/api"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/internal/input"
"github.com/matrix-org/dendrite/roomserver/storage"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib"
)
type Unpeeker struct {
ServerName gomatrixserverlib.ServerName
Cfg *config.RoomServer
FSAPI fsAPI.RoomserverFederationAPI
DB storage.Database
Inputer *input.Inputer
}
// PerformPeek handles peeking into matrix rooms, including over federation by talking to the federationapi.
func (r *Unpeeker) PerformUnpeek(
ctx context.Context,
req *api.PerformUnpeekRequest,
res *api.PerformUnpeekResponse,
) {
if err := r.performUnpeek(ctx, req); err != nil {
perr, ok := err.(*api.PerformError)
if ok {
res.Error = perr
} else {
res.Error = &api.PerformError{
Msg: err.Error(),
}
}
}
}
func (r *Unpeeker) performUnpeek(
ctx context.Context,
req *api.PerformUnpeekRequest,
) error {
// FIXME: there's way too much duplication with performJoin
_, domain, err := gomatrixserverlib.SplitID('@', req.UserID)
if err != nil {
return &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("Supplied user ID %q in incorrect format", req.UserID),
}
}
if domain != r.Cfg.Matrix.ServerName {
return &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("User %q does not belong to this homeserver", req.UserID),
}
}
if strings.HasPrefix(req.RoomID, "!") {
return r.performUnpeekRoomByID(ctx, req)
}
return &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("Room ID %q is invalid", req.RoomID),
}
}
func (r *Unpeeker) performUnpeekRoomByID(
_ context.Context,
req *api.PerformUnpeekRequest,
) (err error) {
// Get the domain part of the room ID.
_, _, err = gomatrixserverlib.SplitID('!', req.RoomID)
if err != nil {
return &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("Room ID %q is invalid: %s", req.RoomID, err),
}
}
// TODO: handle federated peeks
err = r.Inputer.OutputProducer.ProduceRoomEvents(req.RoomID, []api.OutputEvent{
{
Type: api.OutputTypeRetirePeek,
RetirePeek: &api.OutputRetirePeek{
RoomID: req.RoomID,
UserID: req.UserID,
DeviceID: req.DeviceID,
},
},
})
if err != nil {
return
}
// By this point, if req.RoomIDOrAlias contained an alias, then
// it will have been overwritten with a room ID by performPeekRoomByAlias.
// We should now include this in the response so that the CS API can
// return the right room ID.
return nil
}
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