[site-reviews] [wc_verified_owner] shortcode

/**
 * Registers the [wc_verified_owner][/wc_verified_owner] shortcode
 *
 * @param array $atts
 * @param string $content
 * @return ?string
 */
add_shortcode('wc_verified_owner', function ($atts, $content = '') {
    if (!function_exists('wc_customer_bought_product') || !function_exists('wc_get_product')) {
        return;
    }
    if (empty($content)) {
        return;
    }
    $product = wc_get_product(get_the_ID());
    if (!$product) {
        return;
    }
    $defaults = [
        'message' => esc_html_e('Only logged in customers who have purchased this product may leave a review.', 'woocommerce'),
    ];
    $atts = shortcode_atts($defaults, $atts, 'wc_verified_owner');
    $isProductOwner = wc_customer_bought_product('', get_current_user_id(), $product->get_id());
    $verificationRequired = 'yes' === get_option('woocommerce_review_rating_verification_required');
    if (!$isProductOwner && $verificationRequired) {
        $message = sanitize_text_field($atts['message']);
        if (!empty($message)) {
            $message = sprintf('<p class="woocommerce-verification-required">%s</p>', $message);
        }
        return $message;
    }
    return do_shortcode($content);
}, 10, 2);