mirror of
https://github.com/hoernschen/dendrite.git
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125 lines
3.7 KiB
Go
125 lines
3.7 KiB
Go
// Copyright 2022 The Matrix.org Foundation C.I.C.
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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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"net/http"
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"strconv"
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"github.com/matrix-org/util"
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"github.com/sirupsen/logrus"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/roomserver/api"
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rstypes "github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/dendrite/syncapi/internal"
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"github.com/matrix-org/dendrite/syncapi/storage"
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"github.com/matrix-org/dendrite/syncapi/synctypes"
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"github.com/matrix-org/dendrite/syncapi/types"
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userapi "github.com/matrix-org/dendrite/userapi/api"
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"github.com/matrix-org/gomatrixserverlib/spec"
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)
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type RelationsResponse struct {
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Chunk []synctypes.ClientEvent `json:"chunk"`
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NextBatch string `json:"next_batch,omitempty"`
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PrevBatch string `json:"prev_batch,omitempty"`
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}
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// nolint:gocyclo
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func Relations(
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req *http.Request, device *userapi.Device,
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syncDB storage.Database,
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rsAPI api.SyncRoomserverAPI,
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roomID, eventID, relType, eventType string,
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) util.JSONResponse {
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var err error
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var from, to types.StreamPosition
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var limit int
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dir := req.URL.Query().Get("dir")
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if f := req.URL.Query().Get("from"); f != "" {
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if from, err = types.NewStreamPositionFromString(f); err != nil {
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return util.ErrorResponse(err)
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}
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}
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if t := req.URL.Query().Get("to"); t != "" {
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if to, err = types.NewStreamPositionFromString(t); err != nil {
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return util.ErrorResponse(err)
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}
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}
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if l := req.URL.Query().Get("limit"); l != "" {
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if limit, err = strconv.Atoi(l); err != nil {
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return util.ErrorResponse(err)
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}
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}
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if limit == 0 || limit > 50 {
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limit = 50
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}
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if dir == "" {
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dir = "b"
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}
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if dir != "b" && dir != "f" {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.MissingParam("Bad or missing dir query parameter (should be either 'b' or 'f')"),
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}
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}
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snapshot, err := syncDB.NewDatabaseSnapshot(req.Context())
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if err != nil {
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logrus.WithError(err).Error("Failed to get snapshot for relations")
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return spec.InternalServerError()
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}
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var succeeded bool
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defer sqlutil.EndTransactionWithCheck(snapshot, &succeeded, &err)
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res := &RelationsResponse{
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Chunk: []synctypes.ClientEvent{},
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}
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var events []types.StreamEvent
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events, res.PrevBatch, res.NextBatch, err = snapshot.RelationsFor(
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req.Context(), roomID, eventID, relType, eventType, from, to, dir == "b", limit,
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)
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if err != nil {
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return util.ErrorResponse(err)
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}
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headeredEvents := make([]*rstypes.HeaderedEvent, 0, len(events))
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for _, event := range events {
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headeredEvents = append(headeredEvents, event.HeaderedEvent)
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}
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// Apply history visibility to the result events.
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filteredEvents, err := internal.ApplyHistoryVisibilityFilter(req.Context(), snapshot, rsAPI, headeredEvents, nil, device.UserID, "relations")
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if err != nil {
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return util.ErrorResponse(err)
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}
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// Convert the events into client events, and optionally filter based on the event
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// type if it was specified.
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res.Chunk = make([]synctypes.ClientEvent, 0, len(filteredEvents))
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for _, event := range filteredEvents {
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res.Chunk = append(
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res.Chunk,
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synctypes.ToClientEvent(event.PDU, synctypes.FormatAll),
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)
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}
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succeeded = true
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: res,
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}
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}
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