split s2s into units

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/server/hierarchy.rs

@@ -0,0 +1,21 @@
+use ruma::api::{client::error::ErrorKind, federation::space::get_hierarchy};
+
+use crate::{services, Error, Result, Ruma};
+
+/// # `GET /_matrix/federation/v1/hierarchy/{roomId}`
+///
+/// Gets the space tree in a depth-first manner to locate child rooms of a given
+/// space.
+pub(crate) async fn get_hierarchy_route(body: Ruma<get_hierarchy::v1::Request>) -> Result<get_hierarchy::v1::Response> {
+	let origin = body.origin.as_ref().expect("server is authenticated");
+
+	if services().rooms.metadata.exists(&body.room_id)? {
+		services()
+			.rooms
+			.spaces
+			.get_federation_hierarchy(&body.room_id, origin, body.suggested_only)
+			.await
+	} else {
+		Err(Error::BadRequest(ErrorKind::NotFound, "Room does not exist."))
+	}
+}