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Viewing file:     CreditCardDetector.js (2.87 KB)      -rwxrwxr-x

'use strict';

var CreditCardDetector = {
    blocks: {
        uatp:          [4, 5, 6],
        amex:          [4, 6, 5],
        diners:        [4, 6, 4],
        discover:      [4, 4, 4, 4],
        mastercard:    [4, 4, 4, 4],
        dankort:       [4, 4, 4, 4],
        instapayment:  [4, 4, 4, 4],
        jcb15:         [4, 6, 5],
        jcb:           [4, 4, 4, 4],
        maestro:       [4, 4, 4, 4],
        visa:          [4, 4, 4, 4],
        mir:           [4, 4, 4, 4],
        unionPay:      [4, 4, 4, 4],
        general:       [4, 4, 4, 4]
    },

    re: {
        // starts with 1; 15 digits, not starts with 1800 (jcb card)
        uatp: /^(?!1800)1\d{0,14}/,

        // starts with 34/37; 15 digits
        amex: /^3[47]\d{0,13}/,

        // starts with 6011/65/644-649; 16 digits
        discover: /^(?:6011|65\d{0,2}|64[4-9]\d?)\d{0,12}/,

        // starts with 300-305/309 or 36/38/39; 14 digits
        diners: /^3(?:0([0-5]|9)|[689]\d?)\d{0,11}/,

        // starts with 51-55/2221–2720; 16 digits
        mastercard: /^(5[1-5]\d{0,2}|22[2-9]\d{0,1}|2[3-7]\d{0,2})\d{0,12}/,

        // starts with 5019/4175/4571; 16 digits
        dankort: /^(5019|4175|4571)\d{0,12}/,

        // starts with 637-639; 16 digits
        instapayment: /^63[7-9]\d{0,13}/,

        // starts with 2131/1800; 15 digits
        jcb15: /^(?:2131|1800)\d{0,11}/,

        // starts with 2131/1800/35; 16 digits
        jcb: /^(?:35\d{0,2})\d{0,12}/,

        // starts with 50/56-58/6304/67; 16 digits
        maestro: /^(?:5[0678]\d{0,2}|6304|67\d{0,2})\d{0,12}/,

        // starts with 22; 16 digits
        mir: /^220[0-4]\d{0,12}/,

        // starts with 4; 16 digits
        visa: /^4\d{0,15}/,

        // starts with 62/81; 16 digits
        unionPay: /^(62|81)\d{0,14}/
    },

    getStrictBlocks: function (block) {
      var total = block.reduce(function (prev, current) {
        return prev + current;
      }, 0);

      return block.concat(19 - total);
    },

    getInfo: function (value, strictMode) {
        var blocks = CreditCardDetector.blocks,
            re = CreditCardDetector.re;

        // Some credit card can have up to 19 digits number.
        // Set strictMode to true will remove the 16 max-length restrain,
        // however, I never found any website validate card number like
        // this, hence probably you don't want to enable this option.
        strictMode = !!strictMode;

        for (var key in re) {
            if (re[key].test(value)) {
                var matchedBlocks = blocks[key];
                return {
                    type: key,
                    blocks: strictMode ? this.getStrictBlocks(matchedBlocks) : matchedBlocks
                };
            }
        }

        return {
            type: 'unknown',
            blocks: strictMode ? this.getStrictBlocks(blocks.general) : blocks.general
        };
    }
};

module.exports = CreditCardDetector;