Macbook
58 lines
1.9 KiB
TypeScript
58 lines
1.9 KiB
TypeScript
/**
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* 실시간 차트 상단·우측 현재가·등락률 (크로스헤어와 분리, 업비트 티커 우선)
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*/
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import type { TickerData } from '../hooks/useMarketTicker';
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import type { OHLCVBar } from '../types';
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import { formatUpbitKrwPrice } from './safeFormat';
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export interface ChartLiveQuote {
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price: number | null;
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/** 전일 대비 등락률 (%) */
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changePct: number | null;
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isUp: boolean;
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}
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export function resolveChartLiveQuote(
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ticker: TickerData | undefined | null,
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lastBar: OHLCVBar | null,
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bars: OHLCVBar[],
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): ChartLiveQuote {
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// 실시간 차트: STOMP/WS로 갱신되는 최신 봉 종가 우선 (티커 REST 초기값에 고정되지 않도록)
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const barPrice = lastBar?.close;
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const tickerPrice = ticker?.tradePrice;
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const price =
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barPrice != null && Number.isFinite(barPrice)
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? barPrice
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: tickerPrice != null && Number.isFinite(tickerPrice)
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? tickerPrice
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: null;
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if (ticker?.changeRate != null && Number.isFinite(ticker.changeRate)) {
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const changePct = ticker.changeRate * 100;
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return { price, changePct, isUp: ticker.changeRate >= 0 };
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}
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if (lastBar && bars.length > 1) {
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const prevClose = bars[bars.length - 2].close;
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if (prevClose > 0) {
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const ch = lastBar.close - prevClose;
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const changePct = (ch / prevClose) * 100;
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return { price, changePct, isUp: ch >= 0 };
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}
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}
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const isUp = lastBar ? lastBar.close >= lastBar.open : true;
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return { price, changePct: null, isUp };
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}
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export function formatChartLivePrice(price: number | null): string {
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if (price == null || !Number.isFinite(price)) return '—';
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return `${formatUpbitKrwPrice(price)} KRW`;
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}
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export function formatChartLiveChangePct(changePct: number | null): string {
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if (changePct == null || !Number.isFinite(changePct)) return '';
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const up = changePct >= 0;
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return `${up ? '▲' : '▼'} ${Math.abs(changePct).toFixed(2)}%`;
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}
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