대시보드 중간 커밋

features/dashboard/components/chart/chart-utils.ts

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+/**
+ * @file chart-utils.ts
+ * @description StockLineChart에서 사용하는 유틸리티 함수 모음
+ */
+
+import type { UTCTimestamp } from "lightweight-charts";
+import type {
+  DashboardChartTimeframe,
+  StockCandlePoint,
+} from "@/features/dashboard/types/dashboard.types";
+
+const KRW_FORMATTER = new Intl.NumberFormat("ko-KR");
+
+// ─── 타입 ──────────────────────────────────────────────────
+
+export type ChartBar = {
+  time: UTCTimestamp;
+  open: number;
+  high: number;
+  low: number;
+  close: number;
+  volume: number;
+};
+
+// ─── StockCandlePoint → ChartBar 변환 ─────────────────────
+
+/**
+ * candles 배열을 ChartBar 배열로 정규화 (무효값 필터 + 병합 + 정렬)
+ */
+export function normalizeCandles(
+  candles: StockCandlePoint[],
+  timeframe: DashboardChartTimeframe,
+): ChartBar[] {
+  const rows = candles
+    .map((c) => convertCandleToBar(c, timeframe))
+    .filter((b): b is ChartBar => Boolean(b));
+  return mergeBars([], rows);
+}
+
+/**
+ * 단일 candle → ChartBar 변환. 유효하지 않으면 null
+ */
+export function convertCandleToBar(
+  candle: StockCandlePoint,
+  timeframe: DashboardChartTimeframe,
+): ChartBar | null {
+  const close = candle.close ?? candle.price;
+  if (!Number.isFinite(close) || close <= 0) return null;
+
+  const open = candle.open ?? close;
+  const high = candle.high ?? Math.max(open, close);
+  const low = candle.low ?? Math.min(open, close);
+  const volume = candle.volume ?? 0;
+  const time = resolveBarTimestamp(candle, timeframe);
+  if (!time) return null;
+
+  return {
+    time,
+    open,
+    high: Math.max(high, open, close),
+    low: Math.min(low, open, close),
+    close,
+    volume,
+  };
+}
+
+// ─── 타임스탬프 해석/정렬 ─────────────────────────────────
+
+function resolveBarTimestamp(
+  candle: StockCandlePoint,
+  timeframe: DashboardChartTimeframe,
+): UTCTimestamp | null {
+  // timestamp 필드가 있으면 우선 사용
+  if (
+    typeof candle.timestamp === "number" &&
+    Number.isFinite(candle.timestamp)
+  ) {
+    return alignTimestamp(candle.timestamp, timeframe);
+  }
+
+  const text = typeof candle.time === "string" ? candle.time.trim() : "";
+  if (!text) return null;
+
+  // "MM/DD" 형식 (일봉)
+  if (/^\d{2}\/\d{2}$/.test(text)) {
+    const [mm, dd] = text.split("/");
+    const year = new Date().getFullYear();
+    const ts = Math.floor(
+      new Date(`${year}-${mm}-${dd}T09:00:00+09:00`).getTime() / 1000,
+    );
+    return alignTimestamp(ts, timeframe);
+  }
+
+  // "HH:MM" 또는 "HH:MM:SS" 형식 (분봉)
+  if (/^\d{2}:\d{2}(:\d{2})?$/.test(text)) {
+    const [hh, mi, ss] = text.split(":");
+    const now = new Date();
+    const y = now.getFullYear();
+    const m = `${now.getMonth() + 1}`.padStart(2, "0");
+    const d = `${now.getDate()}`.padStart(2, "0");
+    const ts = Math.floor(
+      new Date(`${y}-${m}-${d}T${hh}:${mi}:${ss ?? "00"}+09:00`).getTime() /
+        1000,
+    );
+    return alignTimestamp(ts, timeframe);
+  }
+
+  return null;
+}
+
+/**
+ * 타임스탬프를 타임프레임 버킷 경계에 정렬
+ * - 1m: 그대로
+ * - 30m/1h: 분 단위를 버킷에 정렬
+ * - 1d: 00:00:00
+ * - 1w: 월요일 00:00:00
+ */
+function alignTimestamp(
+  timestamp: number,
+  timeframe: DashboardChartTimeframe,
+): UTCTimestamp {
+  const d = new Date(timestamp * 1000);
+
+  if (timeframe === "30m" || timeframe === "1h") {
+    const bucket = timeframe === "30m" ? 30 : 60;
+    d.setUTCMinutes(Math.floor(d.getUTCMinutes() / bucket) * bucket, 0, 0);
+  } else if (timeframe === "1d") {
+    d.setUTCHours(0, 0, 0, 0);
+  } else if (timeframe === "1w") {
+    const day = d.getUTCDay();
+    d.setUTCDate(d.getUTCDate() + (day === 0 ? -6 : 1 - day));
+    d.setUTCHours(0, 0, 0, 0);
+  }
+
+  return Math.floor(d.getTime() / 1000) as UTCTimestamp;
+}
+
+// ─── 봉 병합 ──────────────────────────────────────────────
+
+/**
+ * 두 ChartBar 배열을 시간 기준으로 병합. 같은 시간대는 OHLCV 통합
+ */
+export function mergeBars(left: ChartBar[], right: ChartBar[]): ChartBar[] {
+  const map = new Map<number, ChartBar>();
+  for (const bar of [...left, ...right]) {
+    const prev = map.get(bar.time);
+    if (!prev) {
+      map.set(bar.time, bar);
+      continue;
+    }
+    map.set(bar.time, {
+      time: bar.time,
+      open: prev.open,
+      high: Math.max(prev.high, bar.high),
+      low: Math.min(prev.low, bar.low),
+      close: bar.close,
+      volume: Math.max(prev.volume, bar.volume),
+    });
+  }
+  return [...map.values()].sort((a, b) => a.time - b.time);
+}
+
+/**
+ * 실시간 봉 업데이트: 같은 시간이면 기존 봉에 병합, 새 시간이면 추가
+ */
+export function upsertRealtimeBar(
+  prev: ChartBar[],
+  incoming: ChartBar,
+): ChartBar[] {
+  if (prev.length === 0) return [incoming];
+  const last = prev[prev.length - 1];
+
+  if (incoming.time > last.time) return [...prev, incoming];
+  if (incoming.time < last.time) return prev;
+
+  return [
+    ...prev.slice(0, -1),
+    {
+      time: last.time,
+      open: last.open,
+      high: Math.max(last.high, incoming.high),
+      low: Math.min(last.low, incoming.low),
+      close: incoming.close,
+      volume: Math.max(last.volume, incoming.volume),
+    },
+  ];
+}
+
+// ─── 포맷터 ───────────────────────────────────────────────
+
+export function formatPrice(value: number) {
+  return KRW_FORMATTER.format(Math.round(value));
+}
+
+export function formatSignedPercent(value: number) {
+  const sign = value > 0 ? "+" : "";
+  return `${sign}${value.toFixed(2)}%`;
+}
+
+/**
+ * 분봉 타임프레임인지 판별
+ */
+export function isMinuteTimeframe(tf: DashboardChartTimeframe) {
+  return tf === "1m" || tf === "30m" || tf === "1h";
+}