종목변경 시 캔들차트 사라지는 현상 수정

frontend/src/hooks/useStompChartData.ts

@@ -53,6 +53,8 @@ interface Options {
 
 interface Return {
   bars: OHLCVBar[];
+  /** bars 가 어느 종목 기준인지 (로딩 중·전환 직후 null) */
+  barsMarket: string | null;
   latestBar: OHLCVBar | null;
   wsStatus: WsStatus;
   isLoading: boolean;
@@ -105,6 +107,7 @@ export function useStompChartData(
 ): Return {
   const candleType = timeframeToCandleType(timeframe);
   const [bars, setBars] = useState<OHLCVBar[]>([]);
+  const [barsMarket, setBarsMarket] = useState<string | null>(null);
   const [latestBar, setLatestBar] = useState<OHLCVBar | null>(null);
   const [wsStatus, setWsStatus] = useState<WsStatus>('connecting');
   const [isLoading, setIsLoading] = useState(true);
@@ -117,13 +120,17 @@ export function useStompChartData(
   /** 1m 봉 volume 스냅샷 — 상위 분봉 volume 델타 계산용 */
   const last1mVolRef = useRef<number>(0);
   const last1mTimeRef = useRef<number>(0);
+  /** 초기 히스토리 로드 완료 전에는 차트 직접 갱신 콜백을 호출하지 않음 */
+  const historyReadyRef = useRef(false);
 
   useEffect(() => {
     if (opts.enabled === false) return;
     let cancelled = false;
+    historyReadyRef.current = false;
     setIsLoading(true);
     setError(null);
     setBars([]);
+    setBarsMarket(null);
     barsRef.current = [];
     last1mVolRef.current = 0;
     last1mTimeRef.current = 0;
@@ -134,6 +141,8 @@ export function useStompChartData(
       .then(newBars => {
         if (cancelled) return;
         barsRef.current = newBars;
+        historyReadyRef.current = newBars.length > 0;
+        setBarsMarket(market);
         setBars(newBars);
         setLatestBar(newBars[newBars.length - 1] ?? null);
         lastTimeRef.current = newBars[newBars.length - 1]?.time ?? 0;
@@ -159,10 +168,11 @@ export function useStompChartData(
 
     const pushBar = (bar: OHLCVBar) => {
       const current = barsRef.current;
+      const notifyChart = historyReadyRef.current;
       if (current.length === 0) {
         barsRef.current = [bar];
         setLatestBar(bar);
-        optsRef.current.onNewCandle(bar);
+        if (notifyChart) optsRef.current.onNewCandle(bar);
         lastTimeRef.current = bar.time;
         return;
       }
@@ -170,16 +180,16 @@ export function useStompChartData(
       if (bar.time === last.time) {
         barsRef.current[current.length - 1] = bar;
         setLatestBar(bar);
-        optsRef.current.onTickUpdate(bar);
+        if (notifyChart) optsRef.current.onTickUpdate(bar);
       } else if (bar.time > last.time) {
         barsRef.current = [...current, bar];
         setLatestBar(bar);
-        optsRef.current.onNewCandle(bar);
+        if (notifyChart) optsRef.current.onNewCandle(bar);
       } else {
         const patched = { ...bar, time: last.time };
         barsRef.current[current.length - 1] = patched;
         setLatestBar(patched);
-        optsRef.current.onTickUpdate(patched);
+        if (notifyChart) optsRef.current.onTickUpdate(patched);
       }
       lastTimeRef.current = bar.time;
     };
@@ -255,12 +265,15 @@ export function useStompChartData(
 
     setWsStatus('connecting');
     setError(null);
+    historyReadyRef.current = false;
     last1mVolRef.current = 0;
     last1mTimeRef.current = 0;
     void pinChartWatch(market, STOMP_TICK_CANDLE_TYPE);
 
     const topic = `/sub/charts/${market}/${STOMP_TICK_CANDLE_TYPE}`;
+    let alive = true;
     const unsub = subscribeStompTopic(topic, msg => {
+      if (!alive) return;
       setWsStatus('connected');
       const data = parseStompJson<StompCandlePayload>(msg);
           if (data?.time == null || typeof data.time !== 'number') return;
@@ -270,11 +283,12 @@ export function useStompChartData(
     const t = window.setTimeout(() => setWsStatus('connected'), 800);
 
     return () => {
+      alive = false;
       window.clearTimeout(t);
       unsub();
       setWsStatus('disconnected');
     };
   }, [market, timeframe, opts.enabled, applyCandle]);
 
-  return { bars, latestBar, wsStatus, isLoading, error };
+  return { bars, barsMarket, latestBar, wsStatus, isLoading, error };
 }