Split the service in multiple crates

crates/core/src/handlers/oauth2/userinfo.rs

@@ -0,0 +1,43 @@
+// Copyright 2021 The Matrix.org Foundation C.I.C.
+//
+// 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.
+
+use serde::Serialize;
+use sqlx::PgPool;
+use warp::{Filter, Rejection, Reply};
+
+use crate::{
+    config::OAuth2Config, filters::authenticate::with_authentication,
+    storage::oauth2::access_token::OAuth2AccessTokenLookup,
+};
+
+#[derive(Serialize)]
+struct UserInfo {
+    sub: String,
+}
+
+pub(super) fn filter(
+    pool: &PgPool,
+    _config: &OAuth2Config,
+) -> impl Filter<Extract = (impl Reply,), Error = Rejection> + Clone + Send + Sync + 'static {
+    warp::path!("oauth2" / "userinfo")
+        .and(warp::get().or(warp::post()).unify())
+        .and(with_authentication(pool))
+        .and_then(userinfo)
+}
+
+async fn userinfo(token: OAuth2AccessTokenLookup) -> Result<impl Reply, Rejection> {
+    Ok(warp::reply::json(&UserInfo {
+        sub: token.username,
+    }))
+}