Fix error on initialization with no symbols

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/threads/data/mod.rs

@@ -142,6 +142,11 @@ async fn handle_message(
     news_backfill_sender: mpsc::Sender<backfill::Message>,
     message: Message,
 ) {
+    if message.assets.is_empty() {
+        message.response.send(()).unwrap();
+        return;
+    }
+
     let (us_equity_symbols, crypto_symbols): (Vec<_>, Vec<_>) = message
         .assets
         .clone()
@@ -233,8 +238,8 @@ async fn handle_message(
 
                     let position_future = async {
                         alpaca::api::incoming::position::get_by_symbol(
-                            &config.alpaca_rate_limiter,
                             &config.alpaca_client,
+                            &config.alpaca_rate_limiter,
                             &symbol,
                             Some(backoff::infinite()),
                         )

src/threads/data/websocket.rs

@@ -128,6 +128,11 @@ async fn handle_message(
     sink: Arc<Mutex<SplitSink<WebSocketStream<MaybeTlsStream<TcpStream>>, tungstenite::Message>>>,
     message: Message,
 ) {
+    if message.symbols.is_empty() {
+        message.response.send(()).unwrap();
+        return;
+    }
+
     match message.action {
         Some(Action::Subscribe) => {
             let (pending_subscriptions, receivers): (Vec<_>, Vec<_>) = message

src/types/alpaca/api/incoming/position.rs

@@ -102,8 +102,8 @@ pub async fn get(
 }
 
 pub async fn get_by_symbol(
-    alpaca_rate_limiter: &DefaultDirectRateLimiter,
     alpaca_client: &Client,
+    alpaca_rate_limiter: &DefaultDirectRateLimiter,
     symbol: &str,
     backoff: Option<ExponentialBackoff>,
 ) -> Result<Option<Position>, reqwest::Error> {