7 files changed, 192 insertions, 0 deletions
diff --git a/crates/configuration/src/server/error.rs b/crates/configuration/src/server/error.rs
new file mode 100644
index 0000000..730f99a
--- /dev/null
+++ b/crates/configuration/src/server/error.rs
@@ -0,0 +1,26 @@
+use axum::{
+    http::StatusCode,
+    response::{IntoResponse, Response},
+};
+
+#[derive(Debug)]
+pub struct AppError(anyhow::Error);
+
+impl IntoResponse for AppError {
+    fn into_response(self) -> Response {
+        (
+            StatusCode::INTERNAL_SERVER_ERROR,
+            format!("Something went wrong: {}", self.0),
+        )
+            .into_response()
+    }
+}
+
+impl<E> From<E> for AppError
+where
+    E: Into<anyhow::Error>,
+{
+    fn from(err: E) -> Self {
+        Self(err.into())
+    }
+}
diff --git a/crates/configuration/src/server/http_svc.rs b/crates/configuration/src/server/http_svc.rs
new file mode 100644
index 0000000..7b2a258
--- /dev/null
+++ b/crates/configuration/src/server/http_svc.rs
@@ -0,0 +1,63 @@
+mod routes;
+
+use axum::{Router, response::IntoResponse};
+use utoipa::OpenApi;
+use utoipa_axum::router::OpenApiRouter;
+#[cfg(feature = "redoc")]
+use utoipa_redoc::Servable;
+#[cfg(feature = "scalar")]
+use utoipa_scalar::Servable as _;
+
+use crate::{server::http_svc, state::AppHandle};
+
+const TAG_ROUTING: &str = "Routing";
+
+#[derive(OpenApi)]
+#[openapi(
+    tags(
+        (name = TAG_ROUTING, description = "Operations related to routing configuration"),
+    )
+)]
+pub struct ApiDoc;
+
+/// Get health of the API.
+#[utoipa::path(
+    method(get),
+    path = "/",
+    responses(
+        (status = OK, description = "Success", body = str, content_type = "text/plain")
+    )
+)]
+pub async fn health_check() -> impl IntoResponse {
+    let name = env!("CARGO_PKG_NAME");
+    let ver = env!("CARGO_PKG_VERSION");
+
+    format!("{name} v{ver} is live")
+}
+
+pub fn build_router(state: AppHandle) -> Router {
+    let (router, _api) = OpenApiRouter::with_openapi(ApiDoc::openapi())
+        .routes(utoipa_axum::routes!(health_check))
+        .nest("/api", routes::router(state))
+        .split_for_parts();
+
+    #[cfg(feature = "swagger")]
+    let router = router.merge(
+        utoipa_swagger_ui::SwaggerUi::new("/swagger-ui")
+            .url("/api-docs/swaggerdoc.json", _api.clone()),
+    );
+
+    #[cfg(feature = "redoc")]
+    let router = router.merge(utoipa_redoc::Redoc::with_url("/redoc", _api.clone()));
+
+    #[cfg(feature = "rapidoc")]
+    let router = router.merge(
+        utoipa_rapidoc::RapiDoc::with_openapi("/api-docs/rapidoc.json", _api.clone())
+            .path("/rapidoc"),
+    );
+
+    #[cfg(feature = "scalar")]
+    let router = router.merge(utoipa_scalar::Scalar::with_url("/scalar", _api));
+
+    warden_middleware::apply(router)
+}
diff --git a/crates/configuration/src/server/http_svc/routes.rs b/crates/configuration/src/server/http_svc/routes.rs
new file mode 100644
index 0000000..cc065e8
--- /dev/null
+++ b/crates/configuration/src/server/http_svc/routes.rs
@@ -0,0 +1,11 @@
+mod routing;
+
+use utoipa_axum::{router::OpenApiRouter, routes};
+
+use crate::state::AppHandle;
+
+pub fn router(store: AppHandle) -> OpenApiRouter {
+    OpenApiRouter::new()
+        .routes(routes!(routing::get_active))
+        .with_state(store)
+}
diff --git a/crates/configuration/src/server/http_svc/routes/routing.rs b/crates/configuration/src/server/http_svc/routes/routing.rs
new file mode 100644
index 0000000..7c8affe
--- /dev/null
+++ b/crates/configuration/src/server/http_svc/routes/routing.rs
@@ -0,0 +1,4 @@
+//pub mod delete_routing;
+pub mod get_active;
+//pub mod post_routing;
+//pub mod replace_routing;
diff --git a/crates/configuration/src/server/http_svc/routes/routing/get_active.rs b/crates/configuration/src/server/http_svc/routes/routing/get_active.rs
new file mode 100644
index 0000000..562a1f1
--- /dev/null
+++ b/crates/configuration/src/server/http_svc/routes/routing/get_active.rs
@@ -0,0 +1,30 @@
+use axum::{extract::State, response::IntoResponse};
+use warden_core::configuration::routing::RoutingConfiguration;
+
+use crate::{
+    server::{error::AppError, http_svc::TAG_ROUTING, version::Version},
+    state::AppHandle,
+};
+
+#[utoipa::path(
+    get,
+    responses((
+        status = OK,
+        body = RoutingConfiguration
+    )),
+    operation_id = "get_active_routing", // https://github.com/juhaku/utoipa/issues/1170
+    path = "/{version}/routing",
+    params(
+        ("version" = Version, Path, description = "API version, e.g., v1, v2, v3")
+    ),
+    tag = TAG_ROUTING,
+    )
+]
+#[axum::debug_handler]
+#[tracing::instrument(skip(state), err(Debug), fields(method = "GET"))]
+pub(super) async fn active_routing(
+    version: Version,
+    State(state): State<AppHandle>,
+) -> Result<impl IntoResponse, AppError> {
+    Ok(String::default().into_response())
+}
diff --git a/crates/configuration/src/server/interceptor.rs b/crates/configuration/src/server/interceptor.rs
new file mode 100644
index 0000000..eeb36c2
--- /dev/null
+++ b/crates/configuration/src/server/interceptor.rs
@@ -0,0 +1,23 @@
+use tonic::{Status, service::Interceptor};
+use tracing::Span;
+use warden_stack::{
+    opentelemetry::global, tracing::telemetry::tonic::extractor,
+    tracing_opentelemetry::OpenTelemetrySpanExt,
+};
+
+#[derive(Clone, Copy)]
+pub struct MyInterceptor;
+
+impl Interceptor for MyInterceptor {
+    fn call(&mut self, request: tonic::Request<()>) -> Result<tonic::Request<()>, Status> {
+        let span = Span::current();
+
+        let cx = global::get_text_map_propagator(|propagator| {
+            propagator.extract(&extractor::MetadataMap(request.metadata()))
+        });
+
+        span.set_parent(cx);
+
+        Ok(request)
+    }
+}
diff --git a/crates/configuration/src/server/version.rs b/crates/configuration/src/server/version.rs
new file mode 100644
index 0000000..4eb5677
--- /dev/null
+++ b/crates/configuration/src/server/version.rs
@@ -0,0 +1,35 @@
+use std::collections::HashMap;
+
+use axum::{
+    RequestPartsExt,
+    extract::{FromRequestParts, Path},
+    http::{StatusCode, request::Parts},
+    response::{IntoResponse, Response},
+};
+use utoipa::ToSchema;
+
+#[derive(Debug, ToSchema)]
+pub enum Version {
+    V0,
+}
+
+impl<S> FromRequestParts<S> for Version
+where
+    S: Send + Sync,
+{
+    type Rejection = Response;
+
+    async fn from_request_parts(parts: &mut Parts, _state: &S) -> Result<Self, Self::Rejection> {
+        let params: Path<HashMap<String, String>> =
+            parts.extract().await.map_err(IntoResponse::into_response)?;
+
+        let version = params
+            .get("version")
+            .ok_or_else(|| (StatusCode::NOT_FOUND, "version param missing").into_response())?;
+
+        match version.as_str() {
+            "v0" => Ok(Version::V0),
+            _ => Err((StatusCode::NOT_FOUND, "unknown version").into_response()),
+        }
+    }
+}