stylelintError.js

const chalk = require('chalk');

const TYPE = 'stylelint-error';

exports.transformer = (error) => {
  const { originalStack } = error;
  const match = originalStack.some(({ fileName }) => (
    fileName
    && fileName.indexOf('stylelint-webpack-plugin') > 0
  ));
  if (match) {
    return { ...error, type: TYPE };
  }
  return error;
};

function severityColor(severity) {
  switch (severity.toLowerCase()) {
    case 'success': return 'green';
    case 'info': return 'blue';
    case 'note': return 'white';
    case 'warning': return 'yellow';
    case 'error': return 'red';
    default: return 'red';
  }
}

exports.formatter = (errors, severity) => {
  // eslint-disable-next-line no-param-reassign
  errors = errors.filter((e) => e.type === TYPE);
  if (errors.length > 0) {
    return [
      '',
      chalk`{bgMagenta.white  stylelint } {${severityColor(severity)} ${severity}}`,
      ...errors.map(({ message }) => message),
    ];
  }
  return [];
};