112 lines
3.8 KiB
Go
112 lines
3.8 KiB
Go
// Copyright 2017 Vector Creations 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 query
|
|
|
|
import (
|
|
"encoding/json"
|
|
"github.com/matrix-org/dendrite/roomserver/api"
|
|
"github.com/matrix-org/dendrite/roomserver/state"
|
|
"github.com/matrix-org/dendrite/roomserver/types"
|
|
"github.com/matrix-org/gomatrixserverlib"
|
|
"github.com/matrix-org/util"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"net/http"
|
|
)
|
|
|
|
// RoomserverQueryAPIDatabase has the storage APIs needed to implement the query API.
|
|
type RoomserverQueryAPIDatabase interface {
|
|
state.RoomStateDatabase
|
|
// Lookup the numeric ID for the room.
|
|
// Returns 0 if the room doesn't exists.
|
|
// Returns an error if there was a problem talking to the database.
|
|
RoomNID(roomID string) (types.RoomNID, error)
|
|
// Lookup event references for the latest events in the room and the current state snapshot.
|
|
// Returns an error if there was a problem talking to the database.
|
|
LatestEventIDs(roomNID types.RoomNID) ([]gomatrixserverlib.EventReference, types.StateSnapshotNID, error)
|
|
// Lookup the Events for a list of numeric event IDs.
|
|
// Returns a list of events sorted by numeric event ID.
|
|
Events(eventNIDs []types.EventNID) ([]types.Event, error)
|
|
}
|
|
|
|
// RoomserverQueryAPI is an implementation of RoomserverQueryAPI
|
|
type RoomserverQueryAPI struct {
|
|
DB RoomserverQueryAPIDatabase
|
|
}
|
|
|
|
// QueryLatestEventsAndState implements api.RoomserverQueryAPI
|
|
func (r *RoomserverQueryAPI) QueryLatestEventsAndState(
|
|
request *api.QueryLatestEventsAndStateRequest,
|
|
response *api.QueryLatestEventsAndStateResponse,
|
|
) (err error) {
|
|
response.QueryLatestEventsAndStateRequest = *request
|
|
roomNID, err := r.DB.RoomNID(request.RoomID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if roomNID == 0 {
|
|
return nil
|
|
}
|
|
response.RoomExists = true
|
|
var currentStateSnapshotNID types.StateSnapshotNID
|
|
response.LatestEvents, currentStateSnapshotNID, err = r.DB.LatestEventIDs(roomNID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Lookup the currrent state for the requested tuples.
|
|
stateEntries, err := state.LoadStateAtSnapshotForStringTuples(r.DB, currentStateSnapshotNID, request.StateToFetch)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
eventNIDs := make([]types.EventNID, len(stateEntries))
|
|
for i := range stateEntries {
|
|
eventNIDs[i] = stateEntries[i].EventNID
|
|
}
|
|
|
|
stateEvents, err := r.DB.Events(eventNIDs)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
response.StateEvents = make([]gomatrixserverlib.Event, len(stateEvents))
|
|
for i := range stateEvents {
|
|
response.StateEvents[i] = stateEvents[i].Event
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// SetupHTTP adds the RoomserverQueryAPI handlers to the http.ServeMux.
|
|
func (r *RoomserverQueryAPI) SetupHTTP(servMux *http.ServeMux) {
|
|
servMux.Handle(
|
|
api.RoomserverQueryLatestEventsAndStatePath,
|
|
makeAPI("query_latest_events_and_state", func(req *http.Request) util.JSONResponse {
|
|
var request api.QueryLatestEventsAndStateRequest
|
|
var response api.QueryLatestEventsAndStateResponse
|
|
if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
|
|
return util.ErrorResponse(err)
|
|
}
|
|
if err := r.QueryLatestEventsAndState(&request, &response); err != nil {
|
|
return util.ErrorResponse(err)
|
|
}
|
|
return util.JSONResponse{Code: 200, JSON: &response}
|
|
}),
|
|
)
|
|
}
|
|
|
|
func makeAPI(metric string, apiFunc func(req *http.Request) util.JSONResponse) http.Handler {
|
|
return prometheus.InstrumentHandler(metric, util.MakeJSONAPI(util.NewJSONRequestHandler(apiFunc)))
|
|
}
|