如何仅在订阅结帐时显示通知

Question

我在 WooCommerce 网站上有订阅。我创建了一项功能，如果有有效订阅，则在购买时将其重写为新订阅：

add_action( 'woocommerce_thankyou', 'cancel_previous_active_subscription' );
function cancel_previous_active_subscription() {
    $no_of_loops = 0;
    $user_id = get_current_user_id();

    $args = array(
        'subscription_status'       => 'active', 
        'subscriptions_per_page'    => -1,
        'customer_id'               => $user_id, 
        'orderby'                   => 'ID', 
        'order'                     => 'DESC'
    );
    $subscriptions = wcs_get_subscriptions($args);

    foreach ( $subscriptions as $subscription ) {
        $no_of_loops = $no_of_loops + 1;

        if ($no_of_loops > 1){
            $subscription->update_status( 'cancelled' );
        } 
    }
}

现在我们需要确保在结账时，如果有订阅，会显示一条通知。但仅限于结账时订阅，不适用于其他产品。现在，我的代码无法工作。怎么解决？

add_action( 'woocommerce_before_cart', 'display_subscription_notice' );
function display_subscription_notice() {
    $user_id = get_current_user_id();

    $args = array(
        'subscription_status'       => 'active', 
        'subscriptions_per_page'    => 1,
        'customer_id'               => $user_id, 
    );
    $subscriptions = wcs_get_subscriptions($args);

    $has_subscription = false;
    foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
        if ( wcs_order_contains_subscription( $cart_item['data']->get_id() ) ) {
            $has_subscription = true;
            break;
        }
    }


    if ( !empty($subscriptions) && $has_subscription ) {
        wc_add_notice( 'By purchasing a new subscription you will cancel your current one', 'notice' );
    }
}

我有一个工作代码版本，但它绝对适用于所有产品，而且我只在购买新订阅时才需要它：

add_action('woocommerce_before_cart', 'display_subscription_notice');
function display_subscription_notice()
{
    $user_id = get_current_user_id();
    $args = array(
        'subscription_status' => 'active',
        'subscriptions_per_page' => 1,
        'customer_id' => $user_id,
    );
    $subscriptions = wcs_get_subscriptions($args);


    if (!empty($subscriptions)) {
        wc_add_notice('By purchasing a new subscription you will cancel your current one', 'notice');
    }
}

Answer 1

当订阅产品位于购物车并且客户已经有有效订阅时，您可以使用以下命令在结帐页面中显示通知：

// Conditional function: Check if a user has active subscriptions
function has_active_subscriptions( $user_id = 0 ) {
    return wcs_user_has_subscription( $user_id > 0?:get_current_user_id(), '', 'active' );
}

// Conditional function: Check if a user has a subscription product in cart
function has_subscription_in_cart( $cart_contents = null ) {
    foreach ( $cart_contents?:WC()->cart->get_cart() as $item ) {
        if ( $item['data']->is_type( array('subscription', 'subscription_variation') ) ) {
            return true;
        }
    }
    return false;
}

// Display a notice in checkout conditionally
add_action( 'template_redirect', 'display_checkout_subscription_notice' );
function display_checkout_subscription_notice() {
    if ( is_checkout() && ! is_wc_endpoint_url() && has_active_subscriptions() && has_subscription_in_cart() ) {
        wc_add_notice( __('By purchasing a new subscription you will cancel your current active one.'), 'notice' );
    }
}

代码位于子主题的functions.php 文件中（或插件中）。已测试并有效。

在结账页面（如果用户有有效订阅并且购物车中有订阅产品）：