move RumaResponse out of core Error; cleanup Error conversions.

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

src/api/router/response.rs

@@ -0,0 +1,22 @@
+use axum::response::{IntoResponse, Response};
+use bytes::BytesMut;
+use conduit::Error;
+use http::StatusCode;
+use http_body_util::Full;
+use ruma::api::{client::uiaa::UiaaResponse, OutgoingResponse};
+
+#[derive(Clone)]
+pub struct RumaResponse<T>(pub T);
+
+impl From<Error> for RumaResponse<UiaaResponse> {
+	fn from(t: Error) -> Self { Self(t.into()) }
+}
+
+impl<T: OutgoingResponse> IntoResponse for RumaResponse<T> {
+	fn into_response(self) -> Response {
+		match self.0.try_into_http_response::<BytesMut>() {
+			Ok(res) => res.map(BytesMut::freeze).map(Full::new).into_response(),
+			Err(_) => StatusCode::INTERNAL_SERVER_ERROR.into_response(),
+		}
+	}
+}