70 lines
2.2 KiB
JavaScript
70 lines
2.2 KiB
JavaScript
module.exports = function(tin, country) {
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if (tin == null || country == null)
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return true;
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if (typeof tin != 'string' || typeof country != 'string')
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return false;
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tin = tin.toUpperCase();
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country = country.toLowerCase();
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let len = tin.length;
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let validators = {
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es: {
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regExp: /^[A-Z0-9]\d{7}[A-Z0-9]$/,
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validate: () => {
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let isCif = /[A-W]/.test(tin.charAt(0));
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let lastDigit = tin.charAt(len - 1);
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let computedDigit;
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if (isCif) {
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let numbers = tin.substring(1, 8)
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.split('')
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.map(x => parseInt(x));
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let pairSum = numbers
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.filter((_, i) => i % 2 != 0)
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.reduce((a, x) => a + x);
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let oddSum = numbers
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.filter((_, i) => i % 2 == 0)
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.map(x => x * 2)
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.join('')
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.split('')
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.map(x => parseInt(x))
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.reduce((a, x) => a + x);
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let sum = (pairSum + oddSum).toString();
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let units = parseInt(sum.charAt(sum.length - 1));
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let control = units == 0 ? 0 : 10 - units;
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let isLetter = /^[A-Z]$/.test(lastDigit);
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computedDigit = isLetter ? 'JABCDEFGHI'.charAt(control) : control.toString();
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} else {
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// Foreign NIF
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let index = 'XYZ'.indexOf(tin.charAt(0));
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let nif = index == -1 ? tin : index.toString() + tin.substring(1);
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let rest = parseInt(nif.substring(0, 8)) % 23;
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computedDigit = 'TRWAGMYFPDXBNJZSQVHLCKE'.charAt(rest);
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}
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return computedDigit == lastDigit;
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}
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},
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it: {
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regExp: /^(\d{11}|[A-Z]{6}\d{2}[A-Z]\d{2}[A-Z]\d{3}[A-Z])$/
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},
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pt: {
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regExp: /^\d{9}$/
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}
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};
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let validator = validators[country];
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if (!validator)
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return true;
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return validator.regExp.test(tin)
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&& (!validator.validate || validator.validate());
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};
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