Controller.php

Controller.php

/**
   * 
   * @param string $nameOnCard
   * @param integer $cardNumber
   * @return bool
   */
  protected function processCheckout(string $nameOnCard = null, string $cardNumber = null) : bool {

    $errors = array();
    $nameOnCard = trim($nameOnCard);
    if ($nameOnCard == null || strlen($nameOnCard) == 0) {
      $errors[] = 'Invalid name on card.';
    }
    if ($cardNumber == null || strlen($cardNumber) != 16 || !ctype_digit($cardNumber)) {
      $errors[] = 'Invalid card number. Card number must be sixteen digits.';
    }

    if (count($errors) > 0) {
      $this->forwardRequest($errors);
      return false;
    }

    //check cart
    if (ShoppingCart::size() == 0) {
      $this->forwardRequest(array('No items in cart.'));
      return false;
    }

    //try to place a new order
    $user = AuthenticationManager::getAuthenticatedUser();
    $orderId = \Data\DataManager::createOrder($user->getId(), ShoppingCart::getAll(), $nameOnCard, $cardNumber);
    if (!$orderId) {
      $this->forwardRequest(array('Could not create order.'));
      return false;
    }
    //clear shopping card and redirect to success page
    ShoppingCart::clear();
    Util::redirect('index.php?view=success&orderId=' . rawurlencode($orderId));

    return true;
  } 


/**
   * 
   * @param array $errors : optional assign it to 
   * @param string $target : url for redirect of the request
   */
  protected function forwardRequest(array $errors = null, $target = null) {
    //check for given target and try to fall back to previous page if needed
    if ($target == null) {
      if (!isset($_REQUEST[self::PAGE])) {
        throw new Exception('Missing target for forward.');
      }
      $target = $_REQUEST[self::PAGE];
    }
    //forward request to target
    // optional - add errors to redirect and process them in view
    if (count($errors) > 0)
      $target .= '&errors=' . urlencode(serialize($errors));
    header('location: ' . $target);
    exit();
  }