dendrite/currentstateserver/api/wrapper.go

122 lines
4.4 KiB
Go

// 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 api
import (
"context"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
)
// GetEvent returns the current state event in the room or nil.
func GetEvent(ctx context.Context, stateAPI CurrentStateInternalAPI, roomID string, tuple gomatrixserverlib.StateKeyTuple) *gomatrixserverlib.HeaderedEvent {
var res QueryCurrentStateResponse
err := stateAPI.QueryCurrentState(ctx, &QueryCurrentStateRequest{
RoomID: roomID,
StateTuples: []gomatrixserverlib.StateKeyTuple{tuple},
}, &res)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("Failed to QueryCurrentState")
return nil
}
ev, ok := res.StateEvents[tuple]
if ok {
return ev
}
return nil
}
// IsServerBannedFromRoom returns whether the server is banned from a room by server ACLs.
func IsServerBannedFromRoom(ctx context.Context, stateAPI CurrentStateInternalAPI, roomID string, serverName gomatrixserverlib.ServerName) bool {
req := &QueryServerBannedFromRoomRequest{
ServerName: serverName,
RoomID: roomID,
}
res := &QueryServerBannedFromRoomResponse{}
if err := stateAPI.QueryServerBannedFromRoom(ctx, req, res); err != nil {
util.GetLogger(ctx).WithError(err).Error("Failed to QueryServerBannedFromRoom")
return true
}
return res.Banned
}
// PopulatePublicRooms extracts PublicRoom information for all the provided room IDs. The IDs are not checked to see if they are visible in the
// published room directory.
// due to lots of switches
// nolint:gocyclo
func PopulatePublicRooms(ctx context.Context, roomIDs []string, stateAPI CurrentStateInternalAPI) ([]gomatrixserverlib.PublicRoom, error) {
avatarTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.avatar", StateKey: ""}
nameTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.name", StateKey: ""}
canonicalTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomCanonicalAlias, StateKey: ""}
topicTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.topic", StateKey: ""}
guestTuple := gomatrixserverlib.StateKeyTuple{EventType: "m.room.guest_access", StateKey: ""}
visibilityTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomHistoryVisibility, StateKey: ""}
joinRuleTuple := gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomJoinRules, StateKey: ""}
var stateRes QueryBulkStateContentResponse
err := stateAPI.QueryBulkStateContent(ctx, &QueryBulkStateContentRequest{
RoomIDs: roomIDs,
AllowWildcards: true,
StateTuples: []gomatrixserverlib.StateKeyTuple{
nameTuple, canonicalTuple, topicTuple, guestTuple, visibilityTuple, joinRuleTuple, avatarTuple,
{EventType: gomatrixserverlib.MRoomMember, StateKey: "*"},
},
}, &stateRes)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("QueryBulkStateContent failed")
return nil, err
}
chunk := make([]gomatrixserverlib.PublicRoom, len(roomIDs))
i := 0
for roomID, data := range stateRes.Rooms {
pub := gomatrixserverlib.PublicRoom{
RoomID: roomID,
}
joinCount := 0
var joinRule, guestAccess string
for tuple, contentVal := range data {
if tuple.EventType == gomatrixserverlib.MRoomMember && contentVal == "join" {
joinCount++
continue
}
switch tuple {
case avatarTuple:
pub.AvatarURL = contentVal
case nameTuple:
pub.Name = contentVal
case topicTuple:
pub.Topic = contentVal
case canonicalTuple:
pub.CanonicalAlias = contentVal
case visibilityTuple:
pub.WorldReadable = contentVal == "world_readable"
// need both of these to determine whether guests can join
case joinRuleTuple:
joinRule = contentVal
case guestTuple:
guestAccess = contentVal
}
}
if joinRule == gomatrixserverlib.Public && guestAccess == "can_join" {
pub.GuestCanJoin = true
}
pub.JoinedMembersCount = joinCount
chunk[i] = pub
i++
}
return chunk, nil
}