bitforum-frontend/hooks/useMarketData.ts

'use client';

import { useEffect, useRef } from 'react';
import { useSignalRContext } from '@/contexts/signalrProvider';

export default function useMarketData(market: string) {
	const { cryptoConnection, cryptoConnected } = useSignalRContext();
	const prevMarketRef = useRef<string | null>(null);

	useEffect(() => {
		if (!cryptoConnection || !cryptoConnected || !market) {
			return;
		}

		// 이전 마켓 구독 해제
		if (prevMarketRef.current && prevMarketRef.current !== market) {
			cryptoConnection.invoke('UnsubscribeMarket', prevMarketRef.current).catch(() => {});
		}

		// 새 마켓 구독
		cryptoConnection.invoke('SubscribeMarket', market).catch(console.error);
		prevMarketRef.current = market;

		return () => {
			if (prevMarketRef.current) {
				cryptoConnection.invoke('UnsubscribeMarket', prevMarketRef.current).catch(() => {});
				prevMarketRef.current = null;
			}
		};
	}, [cryptoConnection, cryptoConnected, market]);
}