jquery.creditCardValidator.js

/*
jQuery Credit Card Validator 1.2

Copyright 2012 Pawel Decowski

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
 */

(function() {
  var $, Range, Trie,
    indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

  $ = jQuery;

  $.fn.validateCreditCard = function(callback, options) {
    var bind, card, card_type, card_types, get_card_type, is_valid_length, is_valid_luhn, j, len, normalize, ref, validate, validate_number;
    card_types = [
      {
        name: 'amex',
        range: '34,37',
        valid_length: [15]
      }, {
        name: 'diners_club_carte_blanche',
        range: '300-305',
        valid_length: [16, 17, 18, 19]
      }, {
        name: 'diners_club_international',
        range: '3095, 36, 38-39',
        valid_length: [14, 15, 16, 17, 18, 19]
      }, {
        name: 'jcb',
        range: '3088-3094, 3096-3102, 3112-3120, 3158-3159, 3337-3349, 3528-3589',
        valid_length: [16]
      }, {
        name: 'laser',
        range: '6304, 6706, 6709, 6771',
        valid_length: [16, 17, 18, 19]
      }, {
        name: 'visa_electron',
        range: '4026, 417500, 4508, 4844, 4913, 4917',
        valid_length: [16]
      }, {
        name: 'visa',
        range: '4',
        valid_length: [13, 14, 15, 16, 17, 18, 19]
      }, {
        name: 'mastercard',
        range: '51-55,2221-2720',
        valid_length: [16]
      }, {
        name: 'discover',
        range: '6011, 622126-622925, 644-649, 65',
        valid_length: [16, 17, 18, 19]
      }, {
        name: 'dankort',
        range: '5019',
        valid_length: [16]
      }, {
        name: 'maestro',
        range: '50, 56-69',
        valid_length: [12, 13, 14, 15, 16, 17, 18, 19]
      }, {
        name: 'uatp',
        range: '1',
        valid_length: [15]
      }, {
        name: 'mir',
        range: '2200-2204',
        valid_length: [16]
      }
    ];
    bind = false;
    if (callback) {
      if (typeof callback === 'object') {
        options = callback;
        bind = false;
        callback = null;
      } else if (typeof callback === 'function') {
        bind = true;
      }
    }
    if (options == null) {
      options = {};
    }
    if (options.accept == null) {
      options.accept = (function() {
        var j, len, results;
        results = [];
        for (j = 0, len = card_types.length; j < len; j++) {
          card = card_types[j];
          results.push(card.name);
        }
        return results;
      })();
    }
    ref = options.accept;
    for (j = 0, len = ref.length; j < len; j++) {
      card_type = ref[j];
      if (indexOf.call((function() {
        var k, len1, results;
        results = [];
        for (k = 0, len1 = card_types.length; k < len1; k++) {
          card = card_types[k];
          results.push(card.name);
        }
        return results;
      })(), card_type) < 0) {
        throw Error("Credit card type '" + card_type + "' is not supported");
      }
    }
    get_card_type = function(number) {
      var k, len1, r, ref1;
      ref1 = (function() {
        var l, len1, ref1, results;
        results = [];
        for (l = 0, len1 = card_types.length; l < len1; l++) {
          card = card_types[l];
          if (ref1 = card.name, indexOf.call(options.accept, ref1) >= 0) {
            results.push(card);
          }
        }
        return results;
      })();
      for (k = 0, len1 = ref1.length; k < len1; k++) {
        card_type = ref1[k];
        r = Range.rangeWithString(card_type.range);
        if (r.match(number)) {
          return card_type;
        }
      }
      return null;
    };
    is_valid_luhn = function(number) {
      var digit, k, len1, n, ref1, sum;
      sum = 0;
      ref1 = number.split('').reverse();
      for (n = k = 0, len1 = ref1.length; k < len1; n = ++k) {
        digit = ref1[n];
        digit = +digit;
        if (n % 2) {
          digit *= 2;
          if (digit < 10) {
            sum += digit;
          } else {
            sum += digit - 9;
          }
        } else {
          sum += digit;
        }
      }
      return sum % 10 === 0;
    };
    is_valid_length = function(number, card_type) {
      var ref1;
      return ref1 = number.length, indexOf.call(card_type.valid_length, ref1) >= 0;
    };
    validate_number = function(number) {
      var length_valid, luhn_valid;
      card_type = get_card_type(number);
      luhn_valid = is_valid_luhn(number);
      length_valid = false;
      if (card_type != null) {
        length_valid = is_valid_length(number, card_type);
      }
      return {
        card_type: card_type,
        valid: luhn_valid && length_valid,
        luhn_valid: luhn_valid,
        length_valid: length_valid
      };
    };
    validate = (function(_this) {
      return function() {
        var number;
        number = normalize($(_this).val());
        return validate_number(number);
      };
    })(this);
    normalize = function(number) {
      return number.replace(/[ -]/g, '');
    };
    if (!bind) {
      return validate();
    }
    this.on('input.jccv', (function(_this) {
      return function() {
        $(_this).off('keyup.jccv');
        return callback.call(_this, validate());
      };
    })(this));
    this.on('keyup.jccv', (function(_this) {
      return function() {
        return callback.call(_this, validate());
      };
    })(this));
    callback.call(this, validate());
    return this;
  };

  Trie = (function() {
    function Trie() {
      this.trie = {};
    }

    Trie.prototype.push = function(value) {
      var char, i, j, len, obj, ref, results;
      value = value.toString();
      obj = this.trie;
      ref = value.split('');
      results = [];
      for (i = j = 0, len = ref.length; j < len; i = ++j) {
        char = ref[i];
        if (obj[char] == null) {
          if (i === (value.length - 1)) {
            obj[char] = null;
          } else {
            obj[char] = {};
          }
        }
        results.push(obj = obj[char]);
      }
      return results;
    };

    Trie.prototype.find = function(value) {
      var char, i, j, len, obj, ref;
      value = value.toString();
      obj = this.trie;
      ref = value.split('');
      for (i = j = 0, len = ref.length; j < len; i = ++j) {
        char = ref[i];
        if (obj.hasOwnProperty(char)) {
          if (obj[char] === null) {
            return true;
          }
        } else {
          return false;
        }
        obj = obj[char];
      }
    };

    return Trie;

  })();

  Range = (function() {
    function Range(trie1) {
      this.trie = trie1;
      if (this.trie.constructor !== Trie) {
        throw Error('Range constructor requires a Trie parameter');
      }
    }

    Range.rangeWithString = function(ranges) {
      var j, k, len, n, r, range, ref, ref1, trie;
      if (typeof ranges !== 'string') {
        throw Error('rangeWithString requires a string parameter');
      }
      ranges = ranges.replace(/ /g, '');
      ranges = ranges.split(',');
      trie = new Trie;
      for (j = 0, len = ranges.length; j < len; j++) {
        range = ranges[j];
        if (r = range.match(/^(\d+)-(\d+)$/)) {
          for (n = k = ref = r[1], ref1 = r[2]; ref <= ref1 ? k <= ref1 : k >= ref1; n = ref <= ref1 ? ++k : --k) {
            trie.push(n);
          }
        } else if (range.match(/^\d+$/)) {
          trie.push(range);
        } else {
          throw Error("Invalid range '" + r + "'");
        }
      }
      return new Range(trie);
    };

    Range.prototype.match = function(number) {
      return this.trie.find(number);
    };

    return Range;

  })();

}).call(this);