122 lines
4.3 KiB
Go
122 lines
4.3 KiB
Go
// Copyright 2017 Vector Creations Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package routing
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import (
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"encoding/json"
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"net/http"
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"github.com/matrix-org/dendrite/clientapi/httputil"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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"github.com/matrix-org/dendrite/syncapi/storage"
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"github.com/matrix-org/dendrite/syncapi/types"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/util"
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log "github.com/sirupsen/logrus"
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)
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type stateEventInStateResp struct {
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gomatrixserverlib.ClientEvent
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PrevContent json.RawMessage `json:"prev_content,omitempty"`
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ReplacesState string `json:"replaces_state,omitempty"`
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}
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// OnIncomingStateRequest is called when a client makes a /rooms/{roomID}/state
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// request. It will fetch all the state events from the specified room and will
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// append the necessary keys to them if applicable before returning them.
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// Returns an error if something went wrong in the process.
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// TODO: Check if the user is in the room. If not, check if the room's history
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// is publicly visible. Current behaviour is returning an empty array if the
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// user cannot see the room's history.
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func OnIncomingStateRequest(req *http.Request, db storage.Database, roomID string) util.JSONResponse {
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// TODO(#287): Auth request and handle the case where the user has left (where
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// we should return the state at the poin they left)
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stateFilterPart := gomatrixserverlib.DefaultFilterPart()
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// TODO: stateFilterPart should not limit the number of state events (or only limits abusive number of events)
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stateEvents, err := db.GetStateEventsForRoom(req.Context(), roomID, &stateFilterPart)
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if err != nil {
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return httputil.LogThenError(req, err)
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}
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resp := []stateEventInStateResp{}
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// Fill the prev_content and replaces_state keys if necessary
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for _, event := range stateEvents {
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stateEvent := stateEventInStateResp{
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ClientEvent: gomatrixserverlib.ToClientEvent(event, gomatrixserverlib.FormatAll),
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}
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var prevEventRef types.PrevEventRef
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if len(event.Unsigned()) > 0 {
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if err := json.Unmarshal(event.Unsigned(), &prevEventRef); err != nil {
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return httputil.LogThenError(req, err)
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}
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// Fills the previous state event ID if the state event replaces another
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// state event
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if len(prevEventRef.ReplacesState) > 0 {
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stateEvent.ReplacesState = prevEventRef.ReplacesState
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}
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// Fill the previous event if the state event references a previous event
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if prevEventRef.PrevContent != nil {
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stateEvent.PrevContent = prevEventRef.PrevContent
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}
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}
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resp = append(resp, stateEvent)
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}
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: resp,
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}
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}
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// OnIncomingStateTypeRequest is called when a client makes a
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// /rooms/{roomID}/state/{type}/{statekey} request. It will look in current
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// state to see if there is an event with that type and state key, if there
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// is then (by default) we return the content, otherwise a 404.
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func OnIncomingStateTypeRequest(req *http.Request, db storage.Database, roomID string, evType, stateKey string) util.JSONResponse {
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// TODO(#287): Auth request and handle the case where the user has left (where
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// we should return the state at the poin they left)
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logger := util.GetLogger(req.Context())
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logger.WithFields(log.Fields{
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"roomID": roomID,
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"evType": evType,
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"stateKey": stateKey,
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}).Info("Fetching state")
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event, err := db.GetStateEvent(req.Context(), roomID, evType, stateKey)
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if err != nil {
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return httputil.LogThenError(req, err)
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}
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if event == nil {
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return util.JSONResponse{
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Code: http.StatusNotFound,
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JSON: jsonerror.NotFound("cannot find state"),
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}
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}
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stateEvent := stateEventInStateResp{
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ClientEvent: gomatrixserverlib.ToClientEvent(*event, gomatrixserverlib.FormatAll),
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}
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: stateEvent.Content,
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}
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}
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