p2p: Implement published rooms (#923)

* Create and glue ExternalPublicRoomsProvider into the public rooms component

This is how we will link p2p stuff to dendrite proper.

* Use gmsl structs rather than our own

* Implement federated public rooms

- Make thirdparty endpoint r0 so riot-web loads the public room list

* Typo

* Missing callsites

1 files changed, 16 insertions, 1 deletions

diff --git a/publicroomsapi/routing/routing.go b/publicroomsapi/routing/routing.go
index 1953e04f..321b61b8 100644
--- a/publicroomsapi/routing/routing.go
+++ b/publicroomsapi/routing/routing.go
@@ -24,6 +24,8 @@ import (
 	"github.com/matrix-org/dendrite/common"
 	"github.com/matrix-org/dendrite/publicroomsapi/directory"
 	"github.com/matrix-org/dendrite/publicroomsapi/storage"
+	"github.com/matrix-org/dendrite/publicroomsapi/types"
+	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
 )
 
@@ -34,7 +36,10 @@ const pathPrefixR0 = "/_matrix/client/r0"
 // Due to Setup being used to call many other functions, a gocyclo nolint is
 // applied:
 // nolint: gocyclo
-func Setup(apiMux *mux.Router, deviceDB devices.Database, publicRoomsDB storage.Database) {
+func Setup(
+	apiMux *mux.Router, deviceDB devices.Database, publicRoomsDB storage.Database,
+	fedClient *gomatrixserverlib.FederationClient, extRoomsProvider types.ExternalPublicRoomsProvider,
+) {
 	r0mux := apiMux.PathPrefix(pathPrefixR0).Subrouter()
 
 	authData := auth.Data{
@@ -64,7 +69,17 @@ func Setup(apiMux *mux.Router, deviceDB devices.Database, publicRoomsDB storage.
 	).Methods(http.MethodPut, http.MethodOptions)
 	r0mux.Handle("/publicRooms",
 		common.MakeExternalAPI("public_rooms", func(req *http.Request) util.JSONResponse {
+			if extRoomsProvider != nil {
+				return directory.GetPostPublicRoomsWithExternal(req, publicRoomsDB, fedClient, extRoomsProvider)
+			}
 			return directory.GetPostPublicRooms(req, publicRoomsDB)
 		}),
 	).Methods(http.MethodGet, http.MethodPost, http.MethodOptions)
+
+	// Federation - TODO: should this live here or in federation API? It's sure easier if it's here so here it is.
+	apiMux.Handle("/_matrix/federation/v1/publicRooms",
+		common.MakeExternalAPI("federation_public_rooms", func(req *http.Request) util.JSONResponse {
+			return directory.GetPostPublicRooms(req, publicRoomsDB)
+		}),
+	).Methods(http.MethodGet)
 }