refactor(kanban): isolate legacy sync fixture

req: v1_release/002

examples/kanban/src/main.rs

@@ -375,7 +375,7 @@ struct AppShell {
 }
 
 #[derive(Hemplate)]
-struct SyncShell {
+struct LegacySyncFixture {
     runtime_src: &'static str,
 }
 
@@ -504,13 +504,20 @@ async fn main() {
         .route("/events", get(events))
         .route("/sync/broadcast", get(sync_broadcast))
         .route("/sync/ack", get(sync_ack))
-        .route("/sync-demo", get(sync_demo))
-        .route("/sync.js", get(sync_js))
         .route("/sync/context", get(sync_context))
         .route("/sync/commands", post(sync_command))
         .route("/sync/snapshot", get(sync_snapshot))
         .route(runtime_js_path(), get(runtime))
         .layer(middleware::from_fn(ordinary_handler_timeout));
+    let ordinary_routes = if std::env::var_os("HEMX_KANBAN_LEGACY_SYNC_FIXTURE").as_deref()
+        == Some(std::ffi::OsStr::new("1"))
+    {
+        ordinary_routes
+            .route("/sync-demo", get(legacy_sync_fixture))
+            .route("/sync.js", get(legacy_sync_fixture_js))
+    } else {
+        ordinary_routes
+    };
     let app = ordinary_routes
         .merge(Router::new().route("/sync/acknowledgements", get(sync_acknowledgements)))
         .with_state(state);
@@ -589,9 +596,9 @@ async fn runtime() -> impl IntoResponse {
     runtime_js()
 }
 
-async fn sync_demo() -> impl IntoResponse {
+async fn legacy_sync_fixture() -> impl IntoResponse {
     PageResponse::full(
-        ui::page(&SyncShell {
+        ui::page(&LegacySyncFixture {
             runtime_src: runtime_js_path(),
         })
         .into_string(),
@@ -600,10 +607,10 @@ async fn sync_demo() -> impl IntoResponse {
     .fingerprint(ui::BUILD_FINGERPRINT)
 }
 
-async fn sync_js() -> impl IntoResponse {
+async fn legacy_sync_fixture_js() -> impl IntoResponse {
     (
         [("content-type", "text/javascript; charset=utf-8")],
-        include_str!("../static/sync.js"),
+        include_str!("../tests/fixtures/legacy-sync.js"),
     )
 }