$promoCode = PromoCode::fetchFromParameters($_POST);
    if (!$promoCode->save()) {
        $logger->LogError("Error saving promo code.");
        foreach ($promoCode->errors as $error) {
            $logger->LogError($error);
            $errors[] = $error;
        }
    } else {
        header("Location: promo_codes_list.php");
    }
} else {
    if (isset($_REQUEST['id']) && is_numeric($_REQUEST['id'])) {
        $logger->LogInfo("Page was called for edit of id: " . $_REQUEST['id']);
        $id = intval($_REQUEST['id']);
        $logger->LogDebug("Numeric id is: {$id}");
        $promoCode = PromoCode::fetchFromDb($id);
        if ($promoCode == null) {
            $logger->LogError("Invalid request. No promo code with id: {$id} exists.");
            $errors[] = "Invalid request. No promo code with id: {$id} exists.";
        }
    }
}
include "header.php";
?>

<!-- jquery.datePicker.js -->
<script type="text/javascript" src="../scripts/jquery-1.2.6.min.js"></script>
<script type="text/javascript" src="../scripts/date.js"></script>
<script type="text/javascript" src="../scripts/jquery.datePicker.js"></script>
<!-- datePicker required styles -->
<link rel="stylesheet" type="text/css" media="screen" href="../css/datePicker.css">