根据 WooCommerce 购物车总数添加或删除特定购物车项目

问题描述

如果订单总额超过 199.99 美元，我将尝试将免费产品添加到购物车

I am trying to add a free product to the cart if the order total is above $199.99

我已经实现了这一点，并且正在发挥作用.问题是，如果用户随后从购物车中删除了一件商品并再次低于 199.99 美元(以防止玩弄系统)，我需要删除该产品.

I have achieved this and it is working. The issue is that I need to remove the product if the user then deletes an item from the cart and goes below $199.99 again (to prevent gaming the system).

我所拥有的似乎正在发挥作用.问题是，在 REMOVE FROM CART 操作似乎起作用(或刷新页面)之前，我似乎需要单击 2 个链接.

What I have seems to be working. The problem is that it seems I need to click 2 links before the REMOVE FROM CART action seems to be working (or refresh the page).

这是什么原因造成的?是否可以通过 AJAX 完成删除操作?

What is causing this? Can the remove action be accomplished with AJAX by any chance?

// -------------------------------------------
// ADD PRODUCT IF ORDER MINIMUM ABOVE 200

/*
* Automatically adding the product to the cart when cart total amount reach to $199.99.
*/

function aapc_add_product_to_cart() {
    global $woocommerce;

    $cart_total = 199.99;   

    if ( $woocommerce->cart->total >= $cart_total ) {
        if ( is_user_logged_in() ) {
            $free_product_id = 339;  // Product Id of the free product which will get added to cart
            $found      = false;

            //check if product already in cart
            if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
                foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {
                    $_product = $values['data'];
                    if ( $_product->get_id() == $free_product_id )
                        $found = true;                  
                }
                // if product not found, add it
                if ( ! $found )
                    WC()->cart->add_to_cart( $free_product_id );
            } else {
                // if no products in cart, add it
                WC()->cart->add_to_cart( $free_product_id );
            }        
        }
    }
    if ( $woocommerce->cart->total <= $cart_total && $found ) {
                WC()->cart->remove_cart_item( $free_product_id );
            }       
}

add_action( 'template_redirect', 'aapc_add_product_to_cart' );

add_action( 'template_redirect', 'remove_product_from_cart_programmatically' );

function remove_product_from_cart_programmatically() {
    if ( is_admin() ) return;
    $product_id = 339; // product id
    $cart_total = 199.99;
    $in_cart = false;
    foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
        if ( $cart_item['product_id'] === $product_id ) {
            $in_cart = true;
            $key = $cart_item_key;
            break;
        }
    }
    if( WC()->cart->total < $cart_total ) {
        if ( $in_cart ) WC()->cart->remove_cart_item( $key );
    }
}

推荐答案

你不应该使用 template_redirect 钩子来添加或删除基于购物车总阈值数量的免费产品......而且你的代码是一个有点过时，有一些错误.

You should not use template_redirect hook to add or remove a free product based on a cart total threshold amount… Also your code is a bit outdated with some mistakes.

改为使用启用 Ajax 的 woocommerce_before_calculate_totals 钩子，这样:

Instead use woocommerce_before_calculate_totals hook that is Ajax enabled, this way:

add_action( 'woocommerce_before_calculate_totals', 'add_or_remove_cart_items', 10, 1 );
function add_or_remove_cart_items( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // ONLY for logged users (and avoiding the hook repetition) 
    if ( ! is_user_logged_in() && did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    $threshold_amount = 200; // The threshold amount for cart total
    $free_product_id  = 339; // ID of the free product
    $cart_items_total = 0; // Initializing

    // Loop through cart items
    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ){
        // Check if the free product is in cart
        if ( $cart_item['data']->get_id() == $free_product_id ) {
            $free_item_key = $cart_item_key;
        }
        // Get cart subtotal incl. tax from items (with discounts if any)
        $cart_items_total += $cart_item['line_total'] + $cart_item['line_tax'];
    }

    // If Cart total is up to the defined amount and if the free products is not in cart, we add it.
    if ( $cart_items_total >= $threshold_amount && ! isset($free_item_key) ) {
        $cart->add_to_cart( $free_product_id );
    }
    // If cart total is below the defined amount and free product is in cart, we remove it.
    elseif ( $cart_items_total < $threshold_amount && isset($free_item_key) ) {
        $cart->remove_cart_item( $free_item_key );
    }
}

代码位于活动子主题(或活动主题)的functions.php 文件中.经测试有效.

Code goes on functions.php file of your active child theme (or active theme). Tested and works.

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