wordpress - 如何在 WooCommerce 结账期间向之前购买订单状态为 'processing' 的产品的客户显示自定义消息

Question

我想在结帐页面上显示一条消息，通知客户他们过去购买过该产品(他们即将购买的产品)，但只有满足这些条件时才应运行此消息。

1. 客户必须登录
2. 用户角色是管理员或客户
3. 之前购买的产品的订单状态应仍为“处理中”。

到目前为止，我已经能够很好地满足前两个条件:

function user_logged_in_product_already_bought() {

    global $woocommerce;

    if ( ! is_user_logged_in() ) return;
            

    $items = $woocommerce->cart->get_cart();

    $has_bought = false;

    foreach($items as $item => $values) { 
        if ( wc_customer_bought_product( '', get_current_user_id(), $values['data']->get_id() ) ) {
            $has_bought = true;
            break;
        }
    } 


    
    $user = wp_get_current_user();
$allowed_roles = array( 'administrator', 'customer' );
if ( array_intersect( $allowed_roles, $user->roles ) ) {
    
    if( $has_bought ){
        wc_print_notice( "You purchased this in the past. Buy again?", 'success' );
    }
}
        


}
add_action( 'woocommerce_before_checkout_form', 'user_logged_in_product_already_bought' );

注意:我使用 foreach 的原因是用户一次只能购买一种产品(在购物车)

但是我不知道如何处理第三个条件。有什么建议吗？

Answer 1

您的前 2 个步骤确实有效，对于第 3 个步骤，您将必须使用一个自定义函数，它只检查订单状态“正在处理”。

此自定义函数的优势在于，与遍历所有现有订单相比，它更快更轻便。

所以你得到:

function has_bought_items( $user_id = 0, $product_ids = 0 ) {
    // When empty, return false
    if ( empty ( $product_ids ) ) return false;

    global $wpdb;
    
    $product_ids = is_array( $product_ids ) ? implode( ',', $product_ids ) : $product_ids;

    $line_meta_value = $product_ids != 0 ? 'AND woim.meta_value IN (' . $product_ids . ')' : 'AND woim.meta_value != 0';

    // Count the number of products
    $count = $wpdb->get_var( "
        SELECT COUNT(p.ID) FROM {$wpdb->prefix}posts AS p
        INNER JOIN {$wpdb->prefix}postmeta AS pm ON p.ID = pm.post_id
        INNER JOIN {$wpdb->prefix}woocommerce_order_items AS woi ON p.ID = woi.order_id
        INNER JOIN {$wpdb->prefix}woocommerce_order_itemmeta AS woim ON woi.order_item_id = woim.order_item_id
        WHERE p.post_status IN ( 'wc-processing' )
        AND pm.meta_key = '_customer_user'
        AND pm.meta_value = '$user_id'
        AND woim.meta_key IN ( '_product_id', '_variation_id' ) $line_meta_value 
    " );

    // Return true if count is higher than 0 (or false)
    return $count > 0 ? true : false;
}
 
function action_woocommerce_before_checkout_form() {
    // Customer must be logged in
    if ( ! is_user_logged_in() ) return;
    
    // Get current user
    $user = wp_get_current_user();
    
    // Allowed user roles
    $allowed_roles = array( 'administrator', 'customer' );
    
    // Compare
    if ( array_intersect( $allowed_roles, $user->roles ) ) {
        // WC Cart NOT null
        if ( ! is_null( WC()->cart ) ) {
            // Initialize
            $product_ids = array();
            
            // Loop through cart contents
            foreach ( WC()->cart->get_cart_contents() as $cart_item ) {
                // Get product ID and push to array
                $product_ids[] = $cart_item['variation_id'] > 0 ? $cart_item['variation_id'] : $cart_item['product_id'];
            }
            
            // Call function, and if true
            if ( has_bought_items( $user->ID, $product_ids ) ) {
                // Notice
                wc_print_notice( __( 'You purchased this in the past. Buy again?', 'woocommerce' ), 'success' );
            }
        }
    }
}
add_action( 'woocommerce_before_checkout_form', 'action_woocommerce_before_checkout_form' );

结果:一般消息

---

可选:您可以使用 woocommerce_checkout_cart_item_quantity Hook ，而不是显示一般消息，而是按产品单独显示

所以你会得到:

function has_bought_items( $user_id = 0, $product_ids = 0 ) {
    // When empty, return false
    if ( empty ( $product_ids ) ) return false;

    global $wpdb;
    
    $product_ids = is_array( $product_ids ) ? implode( ',', $product_ids ) : $product_ids;

    $line_meta_value = $product_ids != 0 ? 'AND woim.meta_value IN (' . $product_ids . ')' : 'AND woim.meta_value != 0';

    // Count the number of products
    $count = $wpdb->get_var( "
        SELECT COUNT(p.ID) FROM {$wpdb->prefix}posts AS p
        INNER JOIN {$wpdb->prefix}postmeta AS pm ON p.ID = pm.post_id
        INNER JOIN {$wpdb->prefix}woocommerce_order_items AS woi ON p.ID = woi.order_id
        INNER JOIN {$wpdb->prefix}woocommerce_order_itemmeta AS woim ON woi.order_item_id = woim.order_item_id
        WHERE p.post_status IN ( 'wc-processing' )
        AND pm.meta_key = '_customer_user'
        AND pm.meta_value = '$user_id'
        AND woim.meta_key IN ( '_product_id', '_variation_id' ) $line_meta_value 
    " );

    // Return true if count is higher than 0 (or false)
    return $count > 0 ? true : false;
}
 
function filter_woocommerce_checkout_cart_item_quantity( $item_qty, $cart_item, $cart_item_key ) {
    // Customer must be logged in
    if ( ! is_user_logged_in() ) return;
    
    // Get current user
    $user = wp_get_current_user();
    
    // Allowed user roles
    $allowed_roles = array( 'administrator', 'customer' );
    
    // Initialize
    $message = '';
    
    // Compare
    if ( array_intersect( $allowed_roles, $user->roles ) ) {
        // Get product id
        $product_id = $cart_item['variation_id'] > 0 ? $cart_item['variation_id'] : $cart_item['product_id'];
        
        // Call function, and if true
        if ( has_bought_items( $user->ID, $product_id ) ) {
            $message = '<p>' . __( 'You purchased this in the past. Buy again?', 'woocommerce' ) . '</p>';
        }
    }

    // Return
    return $item_qty . $message;
}
add_filter( 'woocommerce_checkout_cart_item_quantity', 'filter_woocommerce_checkout_cart_item_quantity', 10, 3 );

结果:按产品分别显示

---

注意has_bought_items() 函数基于Check if a user has purchased specific products in WooCommerce答案代码

相关: Display message below product name on WooCommerce cart page if user has bought product before