SaaS-lib/lib/util/chalk/ansi-styles/index.ts

const ANSI_BACKGROUND_OFFSET = 10;

const wrapAnsi16 =
  (offset = 0) =>
  (code) =>
    `\u001B[${code + offset}m`;

const wrapAnsi256 =
  (offset = 0) =>
  (code) =>
    `\u001B[${38 + offset};5;${code}m`;

const wrapAnsi16m =
  (offset = 0) =>
  (red, green, blue) =>
    `\u001B[${38 + offset};2;${red};${green};${blue}m`;

function assembleStyles() {
  const codes = new Map();
  const styles = {
    modifier: {
      reset: [0, 0],
      // 21 isn't widely supported and 22 does the same thing
      bold: [1, 22],
      dim: [2, 22],
      italic: [3, 23],
      underline: [4, 24],
      overline: [53, 55],
      inverse: [7, 27],
      hidden: [8, 28],
      strikethrough: [9, 29],
    },
    color: {
      black: [30, 39],
      red: [31, 39],
      green: [32, 39],
      yellow: [33, 39],
      blue: [34, 39],
      magenta: [35, 39],
      cyan: [36, 39],
      white: [37, 39],

      // Bright color
      blackBright: [90, 39],
      redBright: [91, 39],
      greenBright: [92, 39],
      yellowBright: [93, 39],
      blueBright: [94, 39],
      magentaBright: [95, 39],
      cyanBright: [96, 39],
      whiteBright: [97, 39],
    },
    bgColor: {
      bgBlack: [40, 49],
      bgRed: [41, 49],
      bgGreen: [42, 49],
      bgYellow: [43, 49],
      bgBlue: [44, 49],
      bgMagenta: [45, 49],
      bgCyan: [46, 49],
      bgWhite: [47, 49],

      // Bright color
      bgBlackBright: [100, 49],
      bgRedBright: [101, 49],
      bgGreenBright: [102, 49],
      bgYellowBright: [103, 49],
      bgBlueBright: [104, 49],
      bgMagentaBright: [105, 49],
      bgCyanBright: [106, 49],
      bgWhiteBright: [107, 49],
    },
  };

  // Alias bright black as gray (and grey)
  styles.color.gray = styles.color.blackBright;
  styles.bgColor.bgGray = styles.bgColor.bgBlackBright;
  styles.color.grey = styles.color.blackBright;
  styles.bgColor.bgGrey = styles.bgColor.bgBlackBright;

  for (const [groupName, group] of Object.entries(styles)) {
    for (const [styleName, style] of Object.entries(group)) {
      styles[styleName] = {
        open: `\u001B[${style[0]}m`,
        close: `\u001B[${style[1]}m`,
      };

      group[styleName] = styles[styleName];

      codes.set(style[0], style[1]);
    }

    Object.defineProperty(styles, groupName, {
      value: group,
      enumerable: false,
    });
  }

  Object.defineProperty(styles, 'codes', {
    value: codes,
    enumerable: false,
  });

  styles.color.close = '\u001B[39m';
  styles.bgColor.close = '\u001B[49m';

  styles.color.ansi = wrapAnsi16();
  styles.color.ansi256 = wrapAnsi256();
  styles.color.ansi16m = wrapAnsi16m();
  styles.bgColor.ansi = wrapAnsi16(ANSI_BACKGROUND_OFFSET);
  styles.bgColor.ansi256 = wrapAnsi256(ANSI_BACKGROUND_OFFSET);
  styles.bgColor.ansi16m = wrapAnsi16m(ANSI_BACKGROUND_OFFSET);

  // From https://github.com/Qix-/color-convert/blob/3f0e0d4e92e235796ccb17f6e85c72094a651f49/conversions.js
  Object.defineProperties(styles, {
    rgbToAnsi256: {
      value: (red, green, blue) => {
        // We use the extended greyscale palette here, with the exception of
        // black and white. normal palette only has 4 greyscale shades.
        if (red === green && green === blue) {
          if (red < 8) {
            return 16;
          }

          if (red > 248) {
            return 231;
          }

          return Math.round(((red - 8) / 247) * 24) + 232;
        }

        return (
          16 +
          36 * Math.round((red / 255) * 5) +
          6 * Math.round((green / 255) * 5) +
          Math.round((blue / 255) * 5)
        );
      },
      enumerable: false,
    },
    hexToRgb: {
      value: (hex) => {
        const matches = /(?<colorString>[a-f\d]{6}|[a-f\d]{3})/i.exec(hex.toString(16));
        if (!matches) {
          return [0, 0, 0];
        }

        let { colorString } = matches.groups;

        if (colorString.length === 3) {
          colorString = [...colorString].map((character) => character + character).join('');
        }

        const integer = Number.parseInt(colorString, 16);

        return [
          /* eslint-disable no-bitwise */
          (integer >> 16) & 0xff,
          (integer >> 8) & 0xff,
          integer & 0xff,
          /* eslint-enable no-bitwise */
        ];
      },
      enumerable: false,
    },
    hexToAnsi256: {
      value: (hex) => styles.rgbToAnsi256(...styles.hexToRgb(hex)),
      enumerable: false,
    },
    ansi256ToAnsi: {
      value: (code) => {
        if (code < 8) {
          return 30 + code;
        }

        if (code < 16) {
          return 90 + (code - 8);
        }

        let red;
        let green;
        let blue;

        if (code >= 232) {
          red = ((code - 232) * 10 + 8) / 255;
          green = red;
          blue = red;
        } else {
          code -= 16;

          const remainder = code % 36;

          red = Math.floor(code / 36) / 5;
          green = Math.floor(remainder / 6) / 5;
          blue = (remainder % 6) / 5;
        }

        const value = Math.max(red, green, blue) * 2;

        if (value === 0) {
          return 30;
        }

        // eslint-disable-next-line no-bitwise
        let result = 30 + ((Math.round(blue) << 2) | (Math.round(green) << 1) | Math.round(red));

        if (value === 2) {
          result += 60;
        }

        return result;
      },
      enumerable: false,
    },
    rgbToAnsi: {
      value: (red, green, blue) => styles.ansi256ToAnsi(styles.rgbToAnsi256(red, green, blue)),
      enumerable: false,
    },
    hexToAnsi: {
      value: (hex) => styles.ansi256ToAnsi(styles.hexToAnsi256(hex)),
      enumerable: false,
    },
  });

  return styles;
}

const ansiStyles = assembleStyles();

export default ansiStyles;