| System: Linux srv913213 5.15.0-190-generic #200-Ubuntu SMP Fri Aug 7 15:06:04 UTC 2026 x86_64 Current Path : /var/www/talentgenesis_admin_backend/node_modules/validator/lib/ |
| Current File : /var/www/talentgenesis_admin_backend/node_modules/validator/lib/isISBN.js |
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = isISBN;
var _assertString = _interopRequireDefault(require("./util/assertString"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
var possibleIsbn10 = /^(?:[0-9]{9}X|[0-9]{10})$/;
var possibleIsbn13 = /^(?:[0-9]{13})$/;
var factor = [1, 3];
function isISBN(isbn, options) {
(0, _assertString.default)(isbn);
// For backwards compatibility:
// isISBN(str [, version]), i.e. `options` could be used as argument for the legacy `version`
var version = String((options === null || options === void 0 ? void 0 : options.version) || options);
if (!(options !== null && options !== void 0 && options.version || options)) {
return isISBN(isbn, {
version: 10
}) || isISBN(isbn, {
version: 13
});
}
var sanitizedIsbn = isbn.replace(/[\s-]+/g, '');
var checksum = 0;
if (version === '10') {
if (!possibleIsbn10.test(sanitizedIsbn)) {
return false;
}
for (var i = 0; i < version - 1; i++) {
checksum += (i + 1) * sanitizedIsbn.charAt(i);
}
if (sanitizedIsbn.charAt(9) === 'X') {
checksum += 10 * 10;
} else {
checksum += 10 * sanitizedIsbn.charAt(9);
}
if (checksum % 11 === 0) {
return true;
}
} else if (version === '13') {
if (!possibleIsbn13.test(sanitizedIsbn)) {
return false;
}
for (var _i = 0; _i < 12; _i++) {
checksum += factor[_i % 2] * sanitizedIsbn.charAt(_i);
}
if (sanitizedIsbn.charAt(12) - (10 - checksum % 10) % 10 === 0) {
return true;
}
}
return false;
}
module.exports = exports.default;
module.exports.default = exports.default;