feat: Implement oauth auth code and refresh token flows

src/api/client/oauth/server_metadata.rs

@@ -1,7 +1,8 @@
 use axum::extract::State;
 use conduwuit::Result;
 use ruma::{api::client::discovery::get_authorization_server_metadata, serde::Raw};
-use serde_json::json;
+use serde_json::{Value, json};
+use service::Services;
 
 use crate::Ruma;
 
@@ -9,13 +10,19 @@ pub(crate) async fn get_authorization_server_metadata_route(
 	State(services): State<crate::State>,
 	_body: Ruma<get_authorization_server_metadata::v1::Request>,
 ) -> Result<get_authorization_server_metadata::v1::Response> {
+	let metadata = Raw::new(&authorization_server_metadata(&services).await).unwrap();
+
+	Ok(get_authorization_server_metadata::v1::Response::new(metadata.cast_unchecked()))
+}
+
+pub(crate) async fn authorization_server_metadata(services: &Services) -> Value {
 	let endpoint_base = services
 		.config
 		.get_client_domain()
 		.join(super::BASE_PATH)
 		.unwrap();
 
-	let metadata = Raw::new(&json!({
+	json!({
 		"authorization_endpoint": endpoint_base.join("grant/authorization_code").unwrap(),
 		"code_challenge_methods_supported": ["S256"],
 		"grant_types_supported": ["authorization_code", "refresh_token"],
@@ -27,8 +34,5 @@ pub(crate) async fn get_authorization_server_metadata_route(
 		"response_types_supported": ["code"],
 		"revocation_endpoint": endpoint_base.join("client/revoke").unwrap(),
 		"token_endpoint": endpoint_base.join("grant/token").unwrap(),
-	}))
-	.unwrap();
-
-	Ok(get_authorization_server_metadata::v1::Response::new(metadata.cast_unchecked()))
+	})
 }