self/app/utils/checks.ts

export function checkInputs(
  passportNumber: string,
  dateOfBirth: string,
  dateOfExpiry: string,
): boolean {
  if (passportNumber.length !== 9) {
    throw new Error('Passport number must be 9 characters long');
  }
  if (dateOfBirth.length !== 6) {
    throw new Error('Date of birth must be 6 characters long');
  }
  if (dateOfExpiry.length !== 6) {
    throw new Error('Date of expiry must be 6 characters long');
  }
  return true;
}

export function getFirstName(mrz: string): string {
  const names = mrz.split("<<");
  const firstName = names[1].split("<")[0].trim();
  const capitalized = firstName.charAt(0) + firstName.slice(1).toLowerCase();
  return capitalized || "Unknown";
}