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// Copyright 2024 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 routing
import (
"encoding/json"
"net/http"
"github.com/matrix-org/dendrite/roomserver/api"
userapi "github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/matrix-org/util"
)
// https://matrix.org/docs/spec/client_server/r0.6.0#get-matrix-client-r0-rooms-roomid-joined-members
type getJoinedMembersResponse struct {
Joined map[string]joinedMember `json:"joined"`
}
type joinedMember struct {
DisplayName string `json:"display_name"`
AvatarURL string `json:"avatar_url"`
}
// The database stores 'displayname' without an underscore.
// Deserialize into this and then change to the actual API response
type databaseJoinedMember struct {
DisplayName string `json:"displayname"`
AvatarURL string `json:"avatar_url"`
}
// GetJoinedMembers implements
//
// GET /rooms/{roomId}/joined_members
func GetJoinedMembers(
req *http.Request, device *userapi.Device, roomID string,
rsAPI api.ClientRoomserverAPI,
) util.JSONResponse {
// Validate the userID
userID, err := spec.NewUserID(device.UserID, true)
if err != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.InvalidParam("Device UserID is invalid"),
}
}
// Validate the roomID
validRoomID, err := spec.NewRoomID(roomID)
if err != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: spec.InvalidParam("RoomID is invalid"),
}
}
// Get the current memberships for the requesting user to determine
// if they are allowed to query this endpoint.
queryReq := api.QueryMembershipForUserRequest{
RoomID: validRoomID.String(),
UserID: *userID,
}
var queryRes api.QueryMembershipForUserResponse
if queryErr := rsAPI.QueryMembershipForUser(req.Context(), &queryReq, &queryRes); queryErr != nil {
util.GetLogger(req.Context()).WithError(queryErr).Error("rsAPI.QueryMembershipsForRoom failed")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
if !queryRes.HasBeenInRoom {
return util.JSONResponse{
Code: http.StatusForbidden,
JSON: spec.Forbidden("You aren't a member of the room and weren't previously a member of the room."),
}
}
if !queryRes.IsInRoom {
return util.JSONResponse{
Code: http.StatusForbidden,
JSON: spec.Forbidden("You aren't a member of the room and weren't previously a member of the room."),
}
}
// Get the current membership events
var membershipsForRoomResp api.QueryMembershipsForRoomResponse
if err = rsAPI.QueryMembershipsForRoom(req.Context(), &api.QueryMembershipsForRoomRequest{
JoinedOnly: true,
RoomID: validRoomID.String(),
}, &membershipsForRoomResp); err != nil {
util.GetLogger(req.Context()).WithError(err).Error("rsAPI.QueryEventsByID failed")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
var res getJoinedMembersResponse
res.Joined = make(map[string]joinedMember)
for _, ev := range membershipsForRoomResp.JoinEvents {
var content databaseJoinedMember
if err := json.Unmarshal(ev.Content, &content); err != nil {
util.GetLogger(req.Context()).WithError(err).Error("failed to unmarshal event content")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
userID, err := rsAPI.QueryUserIDForSender(req.Context(), *validRoomID, spec.SenderID(ev.Sender))
if err != nil || userID == nil {
util.GetLogger(req.Context()).WithError(err).Error("rsAPI.QueryUserIDForSender failed")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.InternalServerError{},
}
}
res.Joined[userID.String()] = joinedMember(content)
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: res,
}
}
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