console-toolkit/src/charts/bars/draw-grouped.js

Toolkit to produce a fancy console output (boxes, tables, charts, colors).

import defaultTheme from '../themes/default.js';
import {normalizeData} from '../utils.js';

export const drawChart =
  drawRow =>
  (values, width, options = {}) => {
    const {maxValue, groupGap = 1, gap = 0, theme = defaultTheme} = options;
    if (isNaN(width) || width <= 0) throw new Error(`"width" should be a positive integer instead of "${width}"`);

    const data = normalizeData(values, theme),
      maxSeriesLength = Math.max(0, ...data.map(series => series.length));

    // normalize length of series and flatten the result
    const newData = [];
    data.forEach(series => {
      newData.push(...series);
      if (series.length < maxSeriesLength) newData.push(...new Array(maxSeriesLength - series.length).fill(null));
    });

    const max =
      typeof maxValue == 'number' && maxValue >= 0 ? maxValue : Math.max(0, ...newData.map(datum => datum?.value || 0));

    if (gap < 1 && groupGap < 1) return newData.map(datum => drawRow([datum], width, max, options));

    const result = [];
    newData.forEach((datum, i) => {
      if (i) {
        if (i % maxSeriesLength == 0) {
          if (groupGap > 0) result.push(new Array(groupGap).fill(''));
        } else {
          if (gap > 0) result.push(new Array(gap).fill(''));
        }
      }
      result.push(drawRow([datum], width, max, options));
    });
    return result.flat(1);
  };

export default drawChart;