Sweden Personnumber Validator for Magento

validate-sweden-ssn.js

/**
 * Magento Sweden SSN Validator
 * @param  none
 * @return boolean 
 * @author Daniel Placinta ([email protected])
 * Based on: jquery-validate-personnummer by Sebastian Wallin
 * Github: https://github.com/wallin/jquery-validate-personnummer
 */
if(Validation) {       
   Validation.addAllThese([     
    [
      'validate-sweden-ssn',      
      'Please add a valid SSN',   
      function(v,r){
      	/**
      	 * The Luhn Algorithm
      	 * https://en.wikipedia.org/wiki/Luhn_algorithm
      	 * @param number
      	 * @return number
      	 */
      	var luhn = function(number){
      		var k, sum, v, _i, _len, _ref;
				  number = "" + number;
				  sum = 0;
				  _ref = number.split('');
				  for (k = _i = 0, _len = _ref.length; _i < _len; k = ++_i) {
				    v = _ref[k];
				    v *= 2 - (k % 2);
				    if (v > 9) {
				      v -= 9;
				    }
				    sum += v;
				  }
				  return Math.ceil(sum / 10) * 10 - sum;
      	}

      	v = v.trim();
      	if(Validation.get('IsEmpty').test(v)){
      		return false;
      	}

      	/**
      	 * Personal Identity Number (Sweden) Algorithm
      	 * https://en.wikipedia.org/wiki/Personal_identity_number_%28Sweden%29
      	 */
      	var cd, control, day, divider, month, p, serial, year, _ref;
			  v = "" + v;
			  p = v.match(/(18|19|20|21){0,1}(\d{2})(\d{2})(\d{2})([\-\+]{0,1})(\d{3})(\d{0,1})/);
			  if (!p) {
			    return false;
			  }
			  _ref = p.slice(2), year = _ref[0], month = _ref[1], day = _ref[2], divider = _ref[3], serial = _ref[4], control = _ref[5];
			  cd = luhn("" + year + month + day + serial);
			  if(cd !== +control || !control){
			  	/* SSN is invalid */
			  	this.error = 'SSN is not valid. Eg: YYMMDD-NNNN (N = number)';
      		return false;
			  }

			  /**
			   * Additional check
			   * Verify if user is 20 years (or above) old
			   */
			  /* 20 years */
			  var yearsToSubstract = 20;

			  /* create a date object using SSN date parameters*/
			  var userDate = new Date(year + "/" + month + "/" + day);

			  /* solve Y2K conversion issue */
			  userDate.setYear(year);

			  /* convert to UTC time */
			  var userDateUTC =  new Date(userDate.getUTCFullYear(), userDate.getUTCMonth(), userDate.getUTCDate(),  userDate.getUTCHours(), userDate.getUTCMinutes(), userDate.getUTCSeconds());

			  /* add 20 years to his age */
			  userDateUTC.setYear(userDate.getUTCFullYear() + yearsToSubstract);

			  /* check if the new age is above current time */
			  if(userDateUTC > Date.now()){
			  	/* User does not meet age requirements */
			  	this.error = 'You need to be at least ' + yearsToSubstract + ' years old.';
      		return false;
			  }

			  /* user meets all requirements */
			  return true;
      } 
    ],
   	[ ]   
	])
}