creditCardUtil.js

function range(start, end) {
  return Array(end - start + 1).fill().map((_, idx) => start + idx)
}

const IIN = [
	{
		ISSUING_NETWORK: "American Express",
		IIN_RANGES: [34, 37],
		ACTIVE: true,
		LENGTH: [15],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Bankcard",
		IIN_RANGES: [5610, 560221, 560222, 560223, 560224, 560225],
		ACTIVE: false,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "China UnionPay",
		IIN_RANGES: [62],
		ACTIVE: true,
		LENGTH: [16, 17, 18, 19],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Diners Club Carte Blanche",
		IIN_RANGES: range(300, 305),
		ACTIVE: true,
		LENGTH: [14],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Diners Club enRoute",
		IIN_RANGES: [2014, 2149],
		ACTIVE: false,
		LENGTH: [16],
		VALIDATION: false
	},
	{
		ISSUING_NETWORK: "Diners Club International",
		IIN_RANGES: [...range(300, 305), 309, 36],
		ACTIVE: true,
		LENGTH: [14],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Diners Club International",
		IIN_RANGES: [38, 39],
		ACTIVE: true,
		LENGTH: [14],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Diners Club United States & Canada",
		IIN_RANGES: [54, 55],
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Discover Card",
		IIN_RANGES: [6011, ...range(622126, 622925), ...range(644, 649), 65],
		ACTIVE: "Yes",
		LENGTH: "16, 19",
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "InterPayment",
		IIN_RANGES: [636],
		ACTIVE: true,
		LENGTH: range(16, 19),
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "InstaPayment",
		IIN_RANGES: range(637, 639),
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "JCB",
		IIN_RANGES: range(3528, 3589),
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Laser",
		IIN_RANGES: [6304, 6706, 6771, 6709],
		ACTIVE: false,
		LENGTH: range(16, 19),
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Maestro",
		IIN_RANGES: [50, 56, 57, 58, 6],
		ACTIVE: true,
		LENGTH: range(12, 19),
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Dankort",
		IIN_RANGES: [5019],
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Dankort",
		IIN_RANGES: ["4XXX", 4175, 4571],
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "MIR",
		IIN_RANGES: range(2200, 2204),
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "MasterCard",
		IIN_RANGES: range(2221, 2720),
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "MasterCard",
		IIN_RANGES: range(51, 55),
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Solo",
		IIN_RANGES: [6334, 6767],
		ACTIVE: false,
		LENGTH: [16, 18, 19],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Switch",
		IIN_RANGES: [4903, 4905, 4911, 4936, 564182, 633110, 6333, 6759],
		ACTIVE: false,
		LENGTH: [16, 18, 19],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Visa",
		IIN_RANGES: [4],
		ACTIVE: true,
		LENGTH: [13, 16, 19],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "UATP",
		IIN_RANGES: [1],
		ACTIVE: true,
		LENGTH: [15],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "Verve",
		IIN_RANGES: [...range(506099, 506198), ...range(650002, 650027)],
		ACTIVE: true,
		LENGTH: [16, 19],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "CARDGUARD EAD BG ILS",
		IIN_RANGES: [5392],
		ACTIVE: true,
		LENGTH: [16],
		VALIDATION: "luhn"
	},
	{
		ISSUING_NETWORK: "CIBC Convenience Card",
		IIN_RANGES: [4506],
		ACTIVE: true,
	  LENGTH: [16]
	},
	{
		ISSUING_NETWORK: "Royal Bank of Canada Client Card",
		IIN_RANGES: [45],
		ACTIVE: true,
		LENGTH: [16]
	},
	{
		ISSUING_NETWORK: "TD Canada Trust Access Card",
		IIN_RANGES: [589297],
		ACTIVE: true,
		LENGTH: [19]
	},
	{
		ISSUING_NETWORK: "Scotiabank Scotia Card",
		IIN_RANGES: [4536],
		ACTIVE: true,
		LENGTH: [16]
	},
	{
		ISSUING_NETWORK: "BMO ABM Card",
		IIN_RANGES: [500],
		ACTIVE: true,
		LENGTH: [16]
	},
	{
		ISSUING_NETWORK: "HSBC Canada Card",
		IIN_RANGES: [56],
		ACTIVE: true,
		LENGTH: [16]
	}
]

function isValid(value) {
	if (/[^0-9-\s]+/.test(value)) return false;
	value = value.replace(/\D/g, "");

	let check = 0;

	for (let n = value.length - 1; n >= 0; n--) {
	  let digit = parseInt(value.charAt(n), 10);
	  if (!(n % 2) && (digit *= 2) > 9) digit -= 9;
	  check += digit;
	}

  return (check % 10) === 0;
}

function whatIssuer(value, length = false) {
  if (!isValid(value)) return [];
	value = value.replace(/\D/g, "");

  return IIN.filter(issuer => length ? issuer.LENGTH.includes(value.length) : true)
    .filter(issuer => {
  	  return issuer.IIN_RANGES.map(x => x.toString())
  	    .some(num => value.startsWith(num))
  	});
}

module.exports = { isValid, whatIssuer };

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