parse credit card data from magnetic card reader and input it into NAR Booth Payments form

card_parser.js

var credit_card_data = "";
var timer = null;

function parse(val){
  var tracks = val.split("?");
  var parts = tracks[0].split("^");
  var card = parts[0].replace("%B", "");
  var card_type = get_card_type(card);
  var names = parts[1].split("/")
  var name = names[1].trim()+" "+names[0].trim();
  var yy = parts[2].substr(0, 2);
  var mm = parts[2].substr(2, 2);
  return {
    card: card,
    card_type: card_type,
    name: name,
    yy: yy,
    mm: mm
  }
}

function get_card_type(number){
  // visa
  var re = new RegExp("^4");
  if (number.match(re) != null) return "Visa";

  // Mastercard
  // Updated for Mastercard 2017 BINs expansion
   if (/^(5[1-5][0-9]{14}|2(22[1-9][0-9]{12}|2[3-9][0-9]{13}|[3-6][0-9]{14}|7[0-1][0-9]{13}|720[0-9]{12}))$/.test(number)) return "Master Card";

  // AMEX
  re = new RegExp("^3[47]");
  if (number.match(re) != null) return "American Express";

  // Discover
  re = new RegExp("^(6011|622(12[6-9]|1[3-9][0-9]|[2-8][0-9]{2}|9[0-1][0-9]|92[0-5]|64[4-9])|65)");
  if (number.match(re) != null) return "Discover";

  // Diners
  re = new RegExp("^36");
  if (number.match(re) != null) return "Diners";

  // Diners - Carte Blanche
  re = new RegExp("^30[0-5]");
  if (number.match(re) != null) return "Diners - Carte Blanche";

  // JCB
  re = new RegExp("^35(2[89]|[3-8][0-9])");
  if (number.match(re) != null) return "JCB";

  // Visa Electron
  re = new RegExp("^(4026|417500|4508|4844|491(3|7))");
  if (number.match(re) != null) return "Visa Electron";

  return "";
}

function apply(values){
  console.log(values);
  $("#CardNumber").val(values.card);
  $("#AccountName").val(values.name);
  $("#YY option").each(function(){
    var v = $(this).text().trim();
    if(v == values.yy){
      $(this).prop("selected", true);
    }
  })
  $("#MM option").each(function(){
    var v = $(this).text().trim();
    if(v == values.mm){
      $(this).prop("selected", true);
    }
  })
  $("input:radio").each(function(){
    var v = $(this).val().trim();
    if(v == values.card_type){
      $(this).prop("checked", true);
    }
  })
}

$(document).ready(function(){
  $(document).on("keydown", function(d){
    if(d.key != "Shift" && d.key != "Enter" && d.key != "Alt"){
      if(!timer){
        timer = setTimeout(function(){
          values = parse(credit_card_data);
          apply(values);
          credit_card_data = "";
          clearTimeout(timer);
          timer = null;
          validate();
        }, 500);
      }
      credit_card_data = credit_card_data + d.key;
    }
  });
});