DB-GPT/web/components/chart/line-chart.tsx

import { ChatContext } from '@/app/chat-context';
import { ChartData } from '@/types/chat';
import { Chart } from '@berryv/g2-react';
import { useContext, useMemo } from 'react';

export default function LineChart({ chart }: { chart: ChartData }) {
  const { mode } = useContext(ChatContext);

  // Process data to ensure numeric values for proper y-axis ordering
  const processedChart = useMemo(() => {
    const processedValues = chart.values.map(item => ({
      ...item,
      value: typeof item.value === 'string' ? parseFloat(item.value) || 0 : item.value,
    }));

    return {
      ...chart,
      values: processedValues,
    };
  }, [chart]);

  return (
    <div className='flex-1 min-w-0 p-4 bg-white dark:bg-theme-dark-container rounded'>
      <div className='h-full'>
        <div className='mb-2'>{chart.chart_name}</div>
        <div className='opacity-80 text-sm mb-2'>{chart.chart_desc}</div>
        <div className='h-[300px]'>
          <Chart
            style={{ height: '100%' }}
            options={{
              autoFit: true,
              theme: mode,
              type: 'view',
              data: processedChart.values,
              children: [
                {
                  type: 'line',
                  encode: {
                    x: 'name',
                    y: 'value',
                    color: 'type',
                    shape: 'smooth',
                  },
                },
                {
                  type: 'area',
                  encode: {
                    x: 'name',
                    y: 'value',
                    color: 'type',
                    shape: 'smooth',
                  },
                  legend: false,
                  style: {
                    fillOpacity: 0.15,
                  },
                },
              ],
              axis: {
                x: {
                  labelAutoRotate: false,
                  title: false,
                },
                y: {
                  title: false,
                },
              },
              scale: {
                value: { type: 'linear' },
              },
            }}
          />
        </div>
      </div>
    </div>
  );
}