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CreditCardDetector.js
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CreditCardDetector.js
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'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;