rename api::client_server to api::client

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

src/api/client/unstable.rs

@@ -0,0 +1,45 @@
+use ruma::{
+	api::client::{error::ErrorKind, membership::mutual_rooms},
+	OwnedRoomId,
+};
+
+use crate::{services, Error, Result, Ruma};
+
+/// # `GET /_matrix/client/unstable/uk.half-shot.msc2666/user/mutual_rooms`
+///
+/// Gets all the rooms the sender shares with the specified user.
+///
+/// TODO: Implement pagination, currently this just returns everything
+///
+/// An implementation of [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666)
+pub(crate) async fn get_mutual_rooms_route(
+	body: Ruma<mutual_rooms::unstable::Request>,
+) -> Result<mutual_rooms::unstable::Response> {
+	let sender_user = body.sender_user.as_ref().expect("user is authenticated");
+
+	if sender_user == &body.user_id {
+		return Err(Error::BadRequest(
+			ErrorKind::Unknown,
+			"You cannot request rooms in common with yourself.",
+		));
+	}
+
+	if !services().users.exists(&body.user_id)? {
+		return Ok(mutual_rooms::unstable::Response {
+			joined: vec![],
+			next_batch_token: None,
+		});
+	}
+
+	let mutual_rooms: Vec<OwnedRoomId> = services()
+		.rooms
+		.user
+		.get_shared_rooms(vec![sender_user.clone(), body.user_id.clone()])?
+		.filter_map(Result::ok)
+		.collect();
+
+	Ok(mutual_rooms::unstable::Response {
+		joined: mutual_rooms,
+		next_batch_token: None,
+	})
+}