How to Gate Content with Easy Digital Downloads and Oxygen Builder Based on User Purchases and Subscriptions

<?php

add_action('plugins_loaded', function () {
    
    if (function_exists('oxygen_vsb_register_condition')) {

        oxygen_vsb_register_condition('User...', array('options' => array(), 'custom' => true), array('has purchased', 'has not purchased'), 'ex_edd_has_user_purchased_callback', 'EDD');

        function ex_edd_has_user_purchased_callback($value, $operator)
        {

            $current_user = get_current_user_id();
            $value = intval($value);

            if ($operator == 'has purchased') {
                if (edd_has_user_purchased($current_user, $value)) {
                    return true;
                } else {
                    return false;
                }
            } else if ($operator == 'has not purchased') {
                if (!edd_has_user_purchased($current_user, $value)) {
                    return true;
                } else {
                    return false;
                }
            }

        }

        oxygen_vsb_register_condition('User is...', array('options' => array(), 'custom' => true), array('subscribed to', 'not subscribed to'), 'ex_edd_has_active_subscription_callback', 'EDD');

        function ex_edd_has_active_subscription_callback($value, $operator)
        {

            $subscriber = new EDD_recurring_subscriber(get_current_user_id());
            $value = intval($value);

            if ($operator == 'subscribed to') {
                if ($subscriber->get_subscriptions($value, array('active'))) {
                    return true;
                } else {
                    return false;
                }
            } else if ($operator == 'not subscribed to') {
                if (!$subscriber->get_subscriptions($value, array('active'))) {
                    return true;
                } else {
                    return false;
                }
            }

        }

    }
});