dataveil
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A robust TypeScript library for masking sensitive data including card numbers, emails, passwords, phone numbers, and more.
28 lines (27 loc) • 1.25 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.maskUUID = maskUUID;
function maskUUID(uuid, options) {
if (options === void 0) { options = {}; }
if (!uuid || typeof uuid !== 'string') {
throw new Error('UUID must be a non-empty string');
}
var uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
if (!uuidRegex.test(uuid)) {
throw new Error('Invalid UUID format');
}
var _a = options.maskChar, maskChar = _a === void 0 ? "*" : _a, _b = options.unmaskedStartDigits, unmaskedStartDigits = _b === void 0 ? 4 : _b, _c = options.unmaskedEndDigits, unmaskedEndDigits = _c === void 0 ? 4 : _c;
if (!maskChar || maskChar.length !== 1) {
throw new Error('Mask character must be a single character');
}
if (unmaskedStartDigits < 0 || unmaskedEndDigits < 0) {
throw new Error('Unmasked digits cannot be negative');
}
if (unmaskedStartDigits + unmaskedEndDigits >= uuid.length) {
return uuid;
}
var start = uuid.slice(0, unmaskedStartDigits);
var end = uuid.slice(-unmaskedEndDigits);
var masked = maskChar.repeat(uuid.length - start.length - end.length);
return start + masked + end;
}