Contact Form 7 Wordpress, checking a few fields, if empty then invalid

Could someone help me to solve the problem. I would like the system work like bellow.

• If both fields are empty = invalid.
• If any of the fields is completed = valid

add_filter('wpcf7_validate_text', 'or_input_validation_filter', 20, 2);

function or_input_validation_filter($result, $tag) {

    if ('your-link' == $tag-name) {
        $your_link = isset($_POST['your-link']) ? trim($_POST['your-link']) : '';
        $your_file = isset($_FILES['your-file']) ? trim($_FILES['your-file']['name']) : '';
        
        if($your_link == ''  $your_file == '') {
            $result-invalidate($tag, One of the fields has not been completed?);
        }
    }
    return $result;
}