export const maskPhoneNumber = (phoneNumber: string): string => {
  const trimmed = (phoneNumber || '').trim();
  if (trimmed.length <= 4) return '****';
  return `${trimmed.slice(0, 2)}****${trimmed.slice(-2)}`;
};

export const maskEmailAddress = (emailAddress: string): string => {
  const email = (emailAddress || '').trim();
  const atIndex = email.indexOf('@');
  if (atIndex <= 1) return '***';

  const name = email.slice(0, atIndex);
  const domain = email.slice(atIndex);
  return `${name[0]}***${name[name.length - 1]}${domain}`;
};