알림목록 캔들차트 매매 시그널 표시

frontend/src/utils/tradeSignalChartMarkers.ts

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+/**
+ * 알림 목록 미니 차트 — 매매 시그널 마커
+ */
+import type { ChartManager } from './ChartManager';
+
+export interface TradeSignalChartMarker {
+  candleTime: number;
+  signalType: 'BUY' | 'SELL';
+  price: number;
+}
+
+/** 알림 candleTime → 차트 bar time (정확 일치 또는 최근접 bar) */
+export function resolveSignalMarkerBarTime(
+  mgr: ChartManager,
+  candleTimeSec: number,
+): number | null {
+  if (!Number.isFinite(candleTimeSec) || candleTimeSec <= 0) return null;
+  if (mgr.getBarAtTime(candleTimeSec)) return candleTimeSec;
+
+  const bars = mgr.getRawBars();
+  if (bars.length === 0) return null;
+
+  let bestTime = bars[0].time;
+  let bestDist = Math.abs(bars[0].time - candleTimeSec);
+  for (let i = 1; i < bars.length; i++) {
+    const t = bars[i].time;
+    const dist = Math.abs(t - candleTimeSec);
+    if (dist < bestDist) {
+      bestDist = dist;
+      bestTime = t;
+    }
+  }
+
+  const maxSnapSec = Math.max(86400, estimateBarIntervalSec(bars) * 2);
+  return bestDist <= maxSnapSec ? bestTime : null;
+}
+
+function estimateBarIntervalSec(bars: { time: number }[]): number {
+  if (bars.length < 2) return 60;
+  const last = bars[bars.length - 1].time - bars[bars.length - 2].time;
+  return last > 0 ? last : 60;
+}
+
+export function buildNotificationSignalMarkers(
+  mgr: ChartManager,
+  marker: TradeSignalChartMarker | undefined,
+): Array<{ time: number; type: string; price: number }> {
+  if (!marker || !Number.isFinite(marker.price) || marker.price <= 0) return [];
+  const time = resolveSignalMarkerBarTime(mgr, marker.candleTime);
+  if (time == null) return [];
+  return [{ time, type: marker.signalType, price: marker.price }];
+}
+
+export function applyNotificationSignalMarkers(
+  mgr: ChartManager,
+  marker: TradeSignalChartMarker | undefined,
+  showPrice = false,
+): void {
+  const signals = buildNotificationSignalMarkers(mgr, marker);
+  if (signals.length === 0) {
+    mgr.clearBacktestMarkers();
+    return;
+  }
+  mgr.setBacktestMarkers(signals, showPrice);
+}