import { REFERENCE_YEAR, MIN_YEAR_SPACE } from '../../data/const.mjs';

var regexMatcher = ({
  regexName,
  regexMatch,
  token
}) => {
  const charClassBases = {
    alphaLower: 26,
    alphaUpper: 26,
    alpha: 52,
    alphanumeric: 62,
    digits: 10,
    symbols: 33
  };
  if (regexName in charClassBases) {
    return charClassBases[regexName] ** token.length;
  }
  // TODO add more regex types for example special dates like 09.11
  switch (regexName) {
    case 'recentYear':
      // conservative estimate of year space: num years from REFERENCE_YEAR.
      // if year is close to REFERENCE_YEAR, estimate a year space of MIN_YEAR_SPACE.
      return Math.max(Math.abs(parseInt(regexMatch[0], 10) - REFERENCE_YEAR), MIN_YEAR_SPACE);
  }
  return 0;
};

export { regexMatcher as default };
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