react-native-wagmi-charts/lib/module/charts/candle/usePrice.js

A sweet candlestick chart for React Native

import { useDerivedValue } from 'react-native-reanimated';
import { formatPrice } from '../../utils';
import { useCandlestickChart } from './useCandlestickChart';
import { getPrice } from './utils';
import { useCandleData } from './useCandleData';
export function useCandlestickChartPrice({
  format,
  precision = 2,
  type = 'crosshair',
} = {}) {
  const { currentY, domain, height } = useCandlestickChart();
  const candle = useCandleData();
  const float = useDerivedValue(() => {
    let price = 0;
    if (type === 'crosshair') {
      price = getPrice({
        y: currentY.value,
        domain: [Math.min(...domain), Math.max(...domain)],
        maxHeight: height,
      });
    } else {
      price = candle.value[type];
    }
    if (price === -1) return '';
    return price.toFixed(precision).toString();
  }, [currentY, domain, height, candle, type, precision]);
  const formatted = useDerivedValue(() => {
    if (!float.value) return '';
    const formattedPrice = formatPrice({
      value: float.value,
    });
    return format
      ? format({
          value: float.value,
          formatted: formattedPrice,
        })
      : formattedPrice;
  }, [float, format]);
  return {
    value: float,
    formatted,
  };
}
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