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package routing
import (
"context"
"fmt"
"net/http"
"strconv"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/matrix-org/dendrite/clientapi/httputil"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
)
type PublicRoomReq struct {
Since string `json:"since,omitempty"`
Limit int16 `json:"limit,omitempty"`
Filter filter `json:"filter,omitempty"`
IncludeAllNetworks bool `json:"include_all_networks,omitempty"`
NetworkID string `json:"third_party_instance_id,omitempty"`
}
type filter struct {
SearchTerms string `json:"generic_search_term,omitempty"`
RoomTypes []string `json:"room_types,omitempty"`
}
// GetPostPublicRooms implements GET and POST /publicRooms
func GetPostPublicRooms(req *http.Request, rsAPI roomserverAPI.FederationRoomserverAPI) util.JSONResponse {
var request PublicRoomReq
if fillErr := fillPublicRoomsReq(req, &request); fillErr != nil {
return *fillErr
}
if request.Limit == 0 {
request.Limit = 50
}
response, err := publicRooms(req.Context(), request, rsAPI)
if err != nil {
return jsonerror.InternalServerError()
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: response,
}
}
func publicRooms(
ctx context.Context, request PublicRoomReq, rsAPI roomserverAPI.FederationRoomserverAPI,
) (*gomatrixserverlib.RespPublicRooms, error) {
var response gomatrixserverlib.RespPublicRooms
var limit int16
var offset int64
limit = request.Limit
offset, err := strconv.ParseInt(request.Since, 10, 64)
// ParseInt returns 0 and an error when trying to parse an empty string
// In that case, we want to assign 0 so we ignore the error
if err != nil && len(request.Since) > 0 {
util.GetLogger(ctx).WithError(err).Error("strconv.ParseInt failed")
return nil, err
}
if request.IncludeAllNetworks && request.NetworkID != "" {
return nil, fmt.Errorf("include_all_networks and third_party_instance_id can not be used together")
}
var queryRes roomserverAPI.QueryPublishedRoomsResponse
err = rsAPI.QueryPublishedRooms(ctx, &roomserverAPI.QueryPublishedRoomsRequest{
NetworkID: request.NetworkID,
}, &queryRes)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("QueryPublishedRooms failed")
return nil, err
}
response.TotalRoomCountEstimate = len(queryRes.RoomIDs)
if offset > 0 {
response.PrevBatch = strconv.Itoa(int(offset) - 1)
}
nextIndex := int(offset) + int(limit)
if response.TotalRoomCountEstimate > nextIndex {
response.NextBatch = strconv.Itoa(nextIndex)
}
if offset < 0 {
offset = 0
}
if nextIndex > len(queryRes.RoomIDs) {
nextIndex = len(queryRes.RoomIDs)
}
roomIDs := queryRes.RoomIDs[offset:nextIndex]
response.Chunk, err = fillInRooms(ctx, roomIDs, rsAPI)
return &response, err
}
// fillPublicRoomsReq fills the Limit, Since and Filter attributes of a GET or POST request
// on /publicRooms by parsing the incoming HTTP request
// Filter is only filled for POST requests
func fillPublicRoomsReq(httpReq *http.Request, request *PublicRoomReq) *util.JSONResponse {
if httpReq.Method == http.MethodGet {
limit, err := strconv.Atoi(httpReq.FormValue("limit"))
// Atoi returns 0 and an error when trying to parse an empty string
// In that case, we want to assign 0 so we ignore the error
if err != nil && len(httpReq.FormValue("limit")) > 0 {
util.GetLogger(httpReq.Context()).WithError(err).Error("strconv.Atoi failed")
reqErr := jsonerror.InternalServerError()
return &reqErr
}
request.Limit = int16(limit)
request.Since = httpReq.FormValue("since")
return nil
} else if httpReq.Method == http.MethodPost {
return httputil.UnmarshalJSONRequest(httpReq, request)
}
return &util.JSONResponse{
Code: http.StatusMethodNotAllowed,
JSON: jsonerror.NotFound("Bad method"),
}
}
// due to lots of switches
func fillInRooms(ctx context.Context, roomIDs []string, rsAPI roomserverAPI.FederationRoomserverAPI) ([]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 roomserverAPI.QueryBulkStateContentResponse
err := rsAPI.QueryBulkStateContent(ctx, &roomserverAPI.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:
if _, _, err := gomatrixserverlib.SplitID('#', contentVal); err == nil {
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
}
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