properly host client lib for deno importing (types working)

bin/core/src/main.rs

@@ -26,6 +26,7 @@ mod resource;
 mod stack;
 mod state;
 mod sync;
+mod ts_client;
 mod ws;
 
 async fn app() -> anyhow::Result<()> {
@@ -76,6 +77,7 @@ async fn app() -> anyhow::Result<()> {
     .nest("/execute", api::execute::router())
     .nest("/listener", listener::router())
     .nest("/ws", ws::router())
+    .nest("/client", ts_client::router())
     .nest_service("/", serve_dir)
     .fallback_service(frontend_index)
     .layer(cors()?)

bin/core/src/ts_client.rs

@@ -0,0 +1,64 @@
+use anyhow::{anyhow, Context};
+use axum::{
+  extract::Path,
+  http::{HeaderMap, HeaderValue},
+  routing::get,
+  Router,
+};
+use reqwest::StatusCode;
+use serde::Deserialize;
+use serror::AddStatusCodeError;
+use tokio::fs;
+
+use crate::config::core_config;
+
+pub fn router() -> Router {
+  Router::new().route("/:path", get(serve_client_file))
+}
+
+const ALLOWED_FILES: &[&str] = &[
+  "lib.js",
+  "lib.d.ts",
+  "types.js",
+  "types.d.ts",
+  "responses.js",
+  "responses.d.ts",
+];
+
+#[derive(Deserialize)]
+struct FilePath {
+  path: String,
+}
+
+async fn serve_client_file(
+  Path(FilePath { path }): Path<FilePath>,
+) -> serror::Result<(HeaderMap, String)> {
+  if !ALLOWED_FILES.contains(&path.as_str()) {
+    return Err(
+      anyhow!("File {path} not found.")
+        .status_code(StatusCode::NOT_FOUND),
+    );
+  }
+
+  let contents = fs::read_to_string(format!(
+    "{}/client/{path}",
+    core_config().frontend_path
+  ))
+  .await
+  .with_context(|| format!("Failed to read file: {path}"))?;
+
+  let mut headers = HeaderMap::new();
+
+  if path.ends_with(".js") {
+    headers.insert(
+      "X-TypeScript-Types",
+      HeaderValue::from_str(&format!(
+        "/client/{}",
+        path.replace(".js", ".d.ts")
+      ))
+      .context("?? Invalid Header Value")?,
+    );
+  }
+
+  Ok((headers, contents))
+}