use go module for dependencies (#594)

clientapi/routing/directory.go

@@ -0,0 +1,183 @@
+// 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 routing
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
+	"github.com/matrix-org/dendrite/clientapi/httputil"
+	"github.com/matrix-org/dendrite/clientapi/jsonerror"
+	"github.com/matrix-org/dendrite/common/config"
+	roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
+	"github.com/matrix-org/gomatrix"
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/matrix-org/util"
+)
+
+// DirectoryRoom looks up a room alias
+func DirectoryRoom(
+	req *http.Request,
+	roomAlias string,
+	federation *gomatrixserverlib.FederationClient,
+	cfg *config.Dendrite,
+	rsAPI roomserverAPI.RoomserverAliasAPI,
+) util.JSONResponse {
+	_, domain, err := gomatrixserverlib.SplitID('#', roomAlias)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.BadJSON("Room alias must be in the form '#localpart:domain'"),
+		}
+	}
+
+	if domain == cfg.Matrix.ServerName {
+		// Query the roomserver API to check if the alias exists locally
+		queryReq := roomserverAPI.GetRoomIDForAliasRequest{Alias: roomAlias}
+		var queryRes roomserverAPI.GetRoomIDForAliasResponse
+		if err = rsAPI.GetRoomIDForAlias(req.Context(), &queryReq, &queryRes); err != nil {
+			return httputil.LogThenError(req, err)
+		}
+
+		// List any roomIDs found associated with this alias
+		if len(queryRes.RoomID) > 0 {
+			return util.JSONResponse{
+				Code: http.StatusOK,
+				JSON: queryRes,
+			}
+		}
+	} else {
+		// Query the federation for this room alias
+		resp, err := federation.LookupRoomAlias(req.Context(), domain, roomAlias)
+		if err != nil {
+			switch err.(type) {
+			case gomatrix.HTTPError:
+			default:
+				// TODO: Return 502 if the remote server errored.
+				// TODO: Return 504 if the remote server timed out.
+				return httputil.LogThenError(req, err)
+			}
+		}
+		if len(resp.RoomID) > 0 {
+			return util.JSONResponse{
+				Code: http.StatusOK,
+				JSON: resp,
+			}
+		}
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusNotFound,
+		JSON: jsonerror.NotFound(
+			fmt.Sprintf("Room alias %s not found", roomAlias),
+		),
+	}
+}
+
+// SetLocalAlias implements PUT /directory/room/{roomAlias}
+// TODO: Check if the user has the power level to set an alias
+func SetLocalAlias(
+	req *http.Request,
+	device *authtypes.Device,
+	alias string,
+	cfg *config.Dendrite,
+	aliasAPI roomserverAPI.RoomserverAliasAPI,
+) util.JSONResponse {
+	_, domain, err := gomatrixserverlib.SplitID('#', alias)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.BadJSON("Room alias must be in the form '#localpart:domain'"),
+		}
+	}
+
+	if domain != cfg.Matrix.ServerName {
+		return util.JSONResponse{
+			Code: http.StatusForbidden,
+			JSON: jsonerror.Forbidden("Alias must be on local homeserver"),
+		}
+	}
+
+	// Check that the alias does not fall within an exclusive namespace of an
+	// application service
+	// TODO: This code should eventually be refactored with:
+	// 1. The new method for checking for things matching an AS's namespace
+	// 2. Using an overall Regex object for all AS's just like we did for usernames
+	for _, appservice := range cfg.Derived.ApplicationServices {
+		if aliasNamespaces, ok := appservice.NamespaceMap["aliases"]; ok {
+			for _, namespace := range aliasNamespaces {
+				if namespace.Exclusive && namespace.RegexpObject.MatchString(alias) {
+					return util.JSONResponse{
+						Code: http.StatusBadRequest,
+						JSON: jsonerror.ASExclusive("Alias is reserved by an application service"),
+					}
+				}
+			}
+		}
+	}
+
+	var r struct {
+		RoomID string `json:"room_id"`
+	}
+	if resErr := httputil.UnmarshalJSONRequest(req, &r); resErr != nil {
+		return *resErr
+	}
+
+	queryReq := roomserverAPI.SetRoomAliasRequest{
+		UserID: device.UserID,
+		RoomID: r.RoomID,
+		Alias:  alias,
+	}
+	var queryRes roomserverAPI.SetRoomAliasResponse
+	if err := aliasAPI.SetRoomAlias(req.Context(), &queryReq, &queryRes); err != nil {
+		return httputil.LogThenError(req, err)
+	}
+
+	if queryRes.AliasExists {
+		return util.JSONResponse{
+			Code: http.StatusConflict,
+			JSON: jsonerror.Unknown("The alias " + alias + " already exists."),
+		}
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusOK,
+		JSON: struct{}{},
+	}
+}
+
+// RemoveLocalAlias implements DELETE /directory/room/{roomAlias}
+// TODO: Check if the user has the power level to remove an alias
+func RemoveLocalAlias(
+	req *http.Request,
+	device *authtypes.Device,
+	alias string,
+	aliasAPI roomserverAPI.RoomserverAliasAPI,
+) util.JSONResponse {
+	queryReq := roomserverAPI.RemoveRoomAliasRequest{
+		Alias:  alias,
+		UserID: device.UserID,
+	}
+	var queryRes roomserverAPI.RemoveRoomAliasResponse
+	if err := aliasAPI.RemoveRoomAlias(req.Context(), &queryReq, &queryRes); err != nil {
+		return httputil.LogThenError(req, err)
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusOK,
+		JSON: struct{}{},
+	}
+}