generatePieChartData.js

const generatePieChartData = (data, percentages = false, keys = []) => {
  const isSingleArray = Object.keys(data).length <= 1;

  if (isSingleArray) {
    return Object.entries(data).reduce((acc, [key, data], idx) => {
      keys.forEach((k, i) => {
        acc[i] = {
          id: k,
          label: k,
          value: data[i]
        };
      });

      return acc;
    }, []);
  } else {
    const total = Object.values(data)
      .flat()
      .map(v => Number(v))
      .reduce((acc, curr) => acc + curr);
    return Object.entries(data).reduce((acc, [key, data], idx) => {
      // TODO: Return error if values are not number
      acc[idx] = {
        id: key,
        label: key,
        value: percentages
          ? +(
              (data.map(v => +v).reduce((acc, curr) => acc + curr) * 100) /
              total
            ).toFixed(2)
          : +data.map(v => +v).reduce((acc, curr) => acc + curr)
      };

      return acc;
    }, []);
  }
};