@skhemata/skhemata-form
Version:
Skhemata Form Web Component. This web component can be used as base web component when working with forms and inputs.
77 lines • 2.79 kB
JavaScript
import assertString from './util/assertString';
/**
* en-US TIN Validation
*
* An Employer Identification Number (EIN), also known as a Federal Tax Identification Number,
* is used to identify a business entity.
*
* NOTES:
* - Prefix 47 is being reserved for future use
* - Prefixes 26, 27, 45, 46 and 47 were previously assigned by the Philadelphia campus.
*
* See `http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/How-EINs-are-Assigned-and-Valid-EIN-Prefixes`
* for more information.
*/
// Valid US IRS campus prefixes
const enUsCampusPrefix = {
andover: ['10', '12'],
atlanta: ['60', '67'],
austin: ['50', '53'],
brookhaven: ['01', '02', '03', '04', '05', '06', '11', '13', '14', '16', '21', '22', '23', '25', '34', '51', '52', '54', '55', '56', '57', '58', '59', '65'],
cincinnati: ['30', '32', '35', '36', '37', '38', '61'],
fresno: ['15', '24'],
internet: ['20', '26', '27', '45', '46', '47'],
kansas: ['40', '44'],
memphis: ['94', '95'],
ogden: ['80', '90'],
philadelphia: ['33', '39', '41', '42', '43', '46', '48', '62', '63', '64', '66', '68', '71', '72', '73', '74', '75', '76', '77', '81', '82', '83', '84', '85', '86', '87', '88', '91', '92', '93', '98', '99'],
sba: ['31'],
};
// Return an array of all US IRS campus prefixes
function enUsGetPrefixes() {
const prefixes = [];
for (const location in enUsCampusPrefix) {
// https://github.com/gotwarlost/istanbul/blob/master/ignoring-code-for-coverage.md#ignoring-code-for-coverage-purposes
// istanbul ignore else
if (enUsCampusPrefix.hasOwnProperty(location)) {
prefixes.push(...enUsCampusPrefix[location]);
}
}
return prefixes;
}
/*
* en-US validation function
* Verify that the TIN starts with a valid IRS campus prefix
*/
function enUsCheck(tin) {
return enUsGetPrefixes().indexOf(tin.substr(0, 2)) !== -1;
}
// tax id regex formats for various locales
const taxIdFormat = {
'en-US': /^\d{2}[- ]{0,1}\d{7}$/,
};
// Algorithmic tax id check functions for various locales
const taxIdCheck = {
'en-US': enUsCheck,
};
/*
* Validator function
* Return true if the passed string is a valid tax identification number
* for the specified locale.
* Throw an error exception if the locale is not supported.
*/
export default function isTaxID(str, locale = 'en-US') {
assertString(str);
if (locale in taxIdFormat) {
if (!taxIdFormat[locale].test(str)) {
return false;
}
if (locale in taxIdCheck) {
return taxIdCheck[locale](str);
}
// Fallthrough; not all locales have algorithmic checks
return true;
}
throw new Error(`Invalid locale '${locale}'`);
}
//# sourceMappingURL=isTaxID.js.map