spain-id/lib/esm/index.js

Spanish id documents validator (NIF, CIF, NIE)

'use strict';
const DNI_REGEX = /^(\d{8})([A-Z])$/;
const CIF_REGEX = /^([ABCDEFGHJKLMNPQRSUVW])(\d{7})([0-9A-J])$/;
const NIE_REGEX = /^[XYZ]\d{7,8}[A-Z]$/;
const sanitize = function (str) {
    // Ensure uppercase and remove whitespace ang hyphens
    return str.toUpperCase().replace(/\s/g, '').replace(/-/g, '');
};
export const validateSpanishId = (str) => {
    str = sanitize(str);
    let valid = false;
    const type = spainIdType(str);
    switch (type) {
        case 'dni':
            valid = validDNI(str);
            break;
        case 'nie':
            valid = validNIE(str);
            break;
        case 'cif':
            valid = validCIF(str);
            break;
    }
    return valid;
};
export const spainIdType = (str) => {
    str = sanitize(str);
    if (str.match(DNI_REGEX)) {
        return 'dni';
    }
    if (str.match(CIF_REGEX)) {
        return 'cif';
    }
    if (str.match(NIE_REGEX)) {
        return 'nie';
    }
};
export const validDNI = (str) => {
    str = sanitize(str);
    const dniLetters = 'TRWAGMYFPDXBNJZSQVHLCKE';
    const letter = dniLetters.charAt(parseInt(str, 10) % 23);
    return letter === str.charAt(8);
};
export const validNIE = (str) => {
    str = sanitize(str);
    // Change the initial letter for the corresponding number and validate as DNI
    let niePrefix = str.charAt(0);
    switch (niePrefix) {
        case 'X':
            niePrefix = '0';
            break;
        case 'Y':
            niePrefix = '1';
            break;
        case 'Z':
            niePrefix = '2';
            break;
        default:
            return false;
    }
    return validDNI(niePrefix + str.substr(1));
};
export const validCIF = (str) => {
    str = sanitize(str);
    if (!str || str.length !== 9) {
        return false;
    }
    const letters = ['J', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I'];
    const digits = str.substr(1, str.length - 2);
    const letter = str.substr(0, 1);
    const control = str.substr(str.length - 1);
    let sum = 0;
    let i;
    let digit;
    if (!letter.match(/[A-Z]/)) {
        return false;
    }
    for (i = 0; i < digits.length; ++i) {
        digit = parseInt(digits[i]);
        if (isNaN(digit)) {
            return false;
        }
        if (i % 2 === 0) {
            digit *= 2;
            if (digit > 9) {
                digit = Math.floor(digit / 10) + (digit % 10);
            }
            sum += digit;
        }
        else {
            sum += digit;
        }
    }
    sum %= 10;
    if (sum !== 0) {
        digit = 10 - sum;
    }
    else {
        digit = sum;
    }
    if (letter.match(/[ABEH]/)) {
        return String(digit) === control;
    }
    if (letter.match(/[NPQRSW]/)) {
        return letters[digit] === control;
    }
    return String(digit) === control || letters[digit] === control;
};