Chile RUT Validation

testRut.js

var ruts = [
  '12.678.579-8', // Valid - with extra digits
  '76086428-5', // Valid
  '220604497', // Valid no dash
  '12531909-2', // Valid
  '76.498.451-K', // Valid - with K verification number
  '76086428', // Invalid missing verificationNumber
  '12.678.579-7', // Invalid verificationNumber
  '76.498.451-0', // Invalid verificationNumber
];

function validateRut(rawRut) {
  var rut = String(rawRut);
  var result = {
    valid: true,
    rawRut: rawRut,
    parsedRut: null,
    rutOnly: null,
    verificationNumber: null,
    message: ''
  };
  // Strip all non-numeric
  rut = rut.replace(/[^0-9K]/g,'');
  result.parsedRut = rut;
  if (rut.length !== 9) {
    result.valid = false;
    result.message = 'RUT is not correct length; should be 8 digits';
    return result;
  }

  var verificationNumber = rut.slice(-1);
  result.verificationNumber = verificationNumber;
  rut = rut.slice(0,-1);
  result.rutOnly = rut;
  var reversed = rut.split('').reverse().join('');
  var total = 0;
  var multiplier = 2;
  for (var i=0; i<reversed.length; i++) {
    total += multiplier * reversed[i];
    multiplier++;
    if (multiplier > 7) {
      multiplier = 2;
    }
  }
  var mod11 = total % 11;
  var actualVerificationNumber = 11 - mod11;
  if (actualVerificationNumber === 11) {
    actualVerificationNumber = 0;
  } else if (actualVerificationNumber === 10) {
    actualVerificationNumber = 'K';
  }
  
  if (String(actualVerificationNumber) !== verificationNumber) {
    result.valid = false;
    result.message = 'Failed verification number check';
    return result;
  }

  console.log('verificationNumber', verificationNumber);
  console.log('rut', rut);
  console.log('reversed', reversed);
  console.log('total', total);
  console.log('mod11', mod11);
  console.log('actualVerificationNumber', actualVerificationNumber);
  return result;
}

for (var r in ruts) {
  var rut = ruts[r];
  console.log('testing', rut);
  var result = validateRut(rut);
  console.log(result);
}