vega-frontend-monorepo/apps/trading/components/last-24h-price-change/last-24h-price-change.tsx

import { useCallback, useMemo, useRef, useState } from 'react';
import throttle from 'lodash/throttle';
import {
  isNumeric,
  t,
  useDataProvider,
  useYesterday,
} from '@vegaprotocol/react-helpers';
import { PriceCellChange } from '@vegaprotocol/ui-toolkit';
import { Schema } from '@vegaprotocol/types';
import type { CandleClose } from '@vegaprotocol/types';
import type { Candle } from '@vegaprotocol/market-list';
import { marketCandlesProvider } from '@vegaprotocol/market-list';
import { HeaderStat } from '../header';
import * as constants from '../constants';

interface Props {
  marketId?: string;
  decimalPlaces?: number;
  initialValue?: string[];
  isHeader?: boolean;
  noUpdate?: boolean;
}

export const Last24hPriceChange = ({
  marketId,
  decimalPlaces,
  initialValue,
  isHeader = false,
  noUpdate = false,
}: Props) => {
  const [candlesClose, setCandlesClose] = useState<string[]>(
    initialValue || []
  );
  const yesterday = useYesterday();
  // Cache timestamp for yesterday to prevent full unmount of market page when
  // a rerender occurs
  const yTimestamp = useMemo(() => {
    return new Date(yesterday).toISOString();
  }, [yesterday]);

  const variables = useMemo(
    () => ({
      marketId: marketId,
      interval: Schema.Interval.INTERVAL_I1H,
      since: yTimestamp,
    }),
    [marketId, yTimestamp]
  );

  const throttledSetCandles = useRef(
    throttle((data: Candle[]) => {
      if (!noUpdate) {
        const candlesClose: string[] = data
          .map((candle) => candle?.close)
          .filter((c): c is CandleClose => c !== null);
        setCandlesClose(candlesClose);
      }
    }, constants.DEBOUNCE_UPDATE_TIME)
  ).current;
  const update = useCallback(
    ({ data }: { data: Candle[] | null }) => {
      if (data) {
        throttledSetCandles(data);
      }
      return true;
    },
    [throttledSetCandles]
  );

  const { error } = useDataProvider<Candle[], Candle>({
    dataProvider: marketCandlesProvider,
    update,
    variables,
    skip: noUpdate || !marketId,
  });

  const content = useMemo(() => {
    if (error || !isNumeric(decimalPlaces)) {
      return <>-</>;
    }
    return (
      <PriceCellChange candles={candlesClose} decimalPlaces={decimalPlaces} />
    );
  }, [candlesClose, decimalPlaces, error]);

  return isHeader ? (
    <HeaderStat heading={t('Change (24h)')} testId="market-change">
      {content}
    </HeaderStat>
  ) : (
    content
  );
};