checks.js

const checkCategoryMapping = require('./check_category_mapping');

const categories = (checkName) => [checkCategoryMapping[checkName] || 'Style'];

// Here Be Dragons: this function extracts the relevant value that triggered the issue for
// checks in the Complexity category. Unfortunately, these values are not available in a
// structured way, so we extract them from strings. That means that any check categorized
// as Complexity MUST have a rule here to extract value.
//
// If a matching string segment cannot be found, `null` will be returned.
var messageMetricValue = function(message) {
  var match = null;
  switch (message.ruleId) {
    case 'complexity':
      match = message.message.match(/complexity of (\d+)/);
      break;
    case 'max-statements':
      match = message.message.match(/too many statements \((\d+)\)/);
      break;
  }
  if (null !== match) {
    return parseInt(match[1], 10);
  }
  return null;
};

const metricThreshold = (ruleId, eslintConfig) => {
  return eslintConfig.rules[ruleId][1];
};

var remediationPoints = function(checkName, message, eslintConfig) {
  if (categories(checkName)[0] === 'Complexity') {
    // (@base_cost + (overage * @cost_per))*1_000_000
    // cost_per: 0.1,  base: 1
    var costPer = 70000,
      points = 1000000,
      threshold = metricThreshold(message.ruleId, eslintConfig),
      overage,
      metricValue;

    metricValue = messageMetricValue(message);
    if (null !== metricValue) {
      overage = metricValue - threshold;
      if (overage > 0) {
        points += costPer * overage;
      }
    }

    return points;
  } else {
    return 50000;
  }
};

module.exports = {
  categories: categories,
  remediationPoints: remediationPoints
};