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room_tagging.go
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/
room_tagging.go
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// Copyright 2019 Sumukha PK
// 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/clientapi/httputil"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
"github.com/matrix-org/dendrite/clientapi/producers"
"github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/gomatrix"
"github.com/matrix-org/util"
)
// GetTags implements GET /_matrix/client/r0/user/{userID}/rooms/{roomID}/tags
func GetTags(
req *http.Request,
userAPI api.ClientUserAPI,
device *api.Device,
userID string,
roomID string,
syncProducer *producers.SyncAPIProducer,
) util.JSONResponse {
if device.UserID != userID {
return util.JSONResponse{
Code: http.StatusForbidden,
JSON: jsonerror.Forbidden("Cannot retrieve another user's tags"),
}
}
tagContent, err := obtainSavedTags(req, userID, roomID, userAPI)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("obtainSavedTags failed")
return jsonerror.InternalServerError()
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: tagContent,
}
}
// PutTag implements PUT /_matrix/client/r0/user/{userID}/rooms/{roomID}/tags/{tag}
// Put functionality works by getting existing data from the DB (if any), adding
// the tag to the "map" and saving the new "map" to the DB
func PutTag(
req *http.Request,
userAPI api.ClientUserAPI,
device *api.Device,
userID string,
roomID string,
tag string,
syncProducer *producers.SyncAPIProducer,
) util.JSONResponse {
if device.UserID != userID {
return util.JSONResponse{
Code: http.StatusForbidden,
JSON: jsonerror.Forbidden("Cannot modify another user's tags"),
}
}
var properties gomatrix.TagProperties
if reqErr := httputil.UnmarshalJSONRequest(req, &properties); reqErr != nil {
return *reqErr
}
tagContent, err := obtainSavedTags(req, userID, roomID, userAPI)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("obtainSavedTags failed")
return jsonerror.InternalServerError()
}
if tagContent.Tags == nil {
tagContent.Tags = make(map[string]gomatrix.TagProperties)
}
tagContent.Tags[tag] = properties
if err = saveTagData(req, userID, roomID, userAPI, tagContent); err != nil {
util.GetLogger(req.Context()).WithError(err).Error("saveTagData failed")
return jsonerror.InternalServerError()
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: struct{}{},
}
}
// DeleteTag implements DELETE /_matrix/client/r0/user/{userID}/rooms/{roomID}/tags/{tag}
// Delete functionality works by obtaining the saved tags, removing the intended tag from
// the "map" and then saving the new "map" in the DB
func DeleteTag(
req *http.Request,
userAPI api.ClientUserAPI,
device *api.Device,
userID string,
roomID string,
tag string,
syncProducer *producers.SyncAPIProducer,
) util.JSONResponse {
if device.UserID != userID {
return util.JSONResponse{
Code: http.StatusForbidden,
JSON: jsonerror.Forbidden("Cannot modify another user's tags"),
}
}
tagContent, err := obtainSavedTags(req, userID, roomID, userAPI)
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("obtainSavedTags failed")
return jsonerror.InternalServerError()
}
// Check whether the tag to be deleted exists
if _, ok := tagContent.Tags[tag]; ok {
delete(tagContent.Tags, tag)
} else {
// Spec only defines 200 responses for this endpoint so we don't return anything else.
return util.JSONResponse{
Code: http.StatusOK,
JSON: struct{}{},
}
}
if err = saveTagData(req, userID, roomID, userAPI, tagContent); err != nil {
util.GetLogger(req.Context()).WithError(err).Error("saveTagData failed")
return jsonerror.InternalServerError()
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: struct{}{},
}
}
// obtainSavedTags gets all tags scoped to a userID and roomID
// from the database
func obtainSavedTags(
req *http.Request,
userID string,
roomID string,
userAPI api.ClientUserAPI,
) (tags gomatrix.TagContent, err error) {
dataReq := api.QueryAccountDataRequest{
UserID: userID,
RoomID: roomID,
DataType: "m.tag",
}
dataRes := api.QueryAccountDataResponse{}
err = userAPI.QueryAccountData(req.Context(), &dataReq, &dataRes)
if err != nil {
return
}
data, ok := dataRes.RoomAccountData[roomID]["m.tag"]
if !ok {
return
}
if err = json.Unmarshal(data, &tags); err != nil {
return
}
return tags, nil
}
// saveTagData saves the provided tag data into the database
func saveTagData(
req *http.Request,
userID string,
roomID string,
userAPI api.ClientUserAPI,
Tag gomatrix.TagContent,
) error {
newTagData, err := json.Marshal(Tag)
if err != nil {
return err
}
dataReq := api.InputAccountDataRequest{
UserID: userID,
RoomID: roomID,
DataType: "m.tag",
AccountData: json.RawMessage(newTagData),
}
dataRes := api.InputAccountDataResponse{}
return userAPI.InputAccountData(req.Context(), &dataReq, &dataRes)
}