根据 WooCommerce 中的购物车金额添加特定的免费礼物

Question

我想添加某种免费礼物，具体取决于 WooCommerce 中的购物车金额。

比方说：

• 低于 1500 - 无赠品
• 介于或等于 1500 - 1999 - 添加免费产品 (1)
• 大于或等于 2000 - 添加另一个免费产品 (2)，删除免费产品 (1)

基于在WooCommerce 答案代码中为最小购物车数量添加免费赠品产品，如果我添加 1 个元素，该代码将起作用，但如果我添加更多元素，它将停止工作。

这是我的代码尝试：

// Add free gifted product for specific cart subtotal
add_action('woocommerce_before_calculate_totals', 'check_free_gifted_product');
function check_free_gifted_product($cart)
{
  if (is_admin() && !defined('DOING_AJAX'))
    return;

  // Settings
  $free_product_id   = 158;
  $targeted_subtotal = 1500;
  $targeted_subtotal_max = 2000;

  $cart_subtotal     = 0; // Initializing

  // Loop through cart items (first loop)
  foreach ($cart->get_cart() as $cart_item_key => $cart_item) {
    // When free product is is cart
    if ($free_product_id == $cart_item['product_id']) {
      $free_key = $cart_item_key;
      $free_qty = $cart_item['quantity'];
      $cart_item['data']->set_price(0); // Optionally set the price to zero
    } else {
      $cart_subtotal += $cart_item['line_total'] + $cart_item['line_tax'];
    }
  }

  // If subtotal match and free product is not already in cart, add it
  if (!isset($free_key) && $cart_subtotal >= $targeted_subtotal && $cart_subtotal <= $targeted_subtotal_max) {
    $cart->add_to_cart($free_product_id);
  }
  // If subtotal doesn't match and free product is already in cart, remove it
  elseif (isset($free_key) && $cart_subtotal < $targeted_subtotal || $cart_subtotal > $targeted_subtotal_max) {
    $cart->remove_cart_item($free_key);
  }
  // Keep free product quantity to 1.
  elseif (isset($free_qty) && $free_qty > 1) {
    $cart->set_quantity($free_key, 1);
  }
}

有什么建议吗？

Answer 1

要添加免费礼物，根据 WooCommerce 中的购物车金额，您可以使用woocommerce_before_calculate_totals操作挂钩

• 如果购物车数量少于 1500，则不会添加免费产品
• 如果购物车金额介于或等于 1500 - 1999 之间，将添加免费产品 (1)
• 如果购物车数量大于或等于 2000，将添加免费产品 (2)，并删除免费产品 (1)

function action_woocommerce_before_calculate_totals( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    // Free product productIDs
    $free_product_id_1 = 819;
    $free_product_id_2 = 821;
    
    // Minimum subtotal needed for free products
    $min_subtotal_free_product_1 = 1500;
    $min_subtotal_free_product_2 = 2000;

    // Initializing
    $cart_subtotal = 0;

    // Loop through cart items
    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ) {
        // When free product is is cart
        if ( $free_product_id_1 == $cart_item['product_id'] ) {
            $free_key_1 = $cart_item_key;
            $free_qty_1 = $cart_item['quantity'];
            // Optionally set the price to zero
            $cart_item['data']->set_price(0);
        } elseif ( $free_product_id_2 == $cart_item['product_id'] ) {
            $free_key_2 = $cart_item_key;
            $free_qty_2 = $cart_item['quantity'];
            // Optionally set the price to zero
            $cart_item['data']->set_price(0);
        } else {
            // NOT empty
            if ( ! empty ( $cart_item['line_total'] ) ) {
                $cart_subtotal += $cart_item['line_total'];
            }

            // NOT empty
            if ( ! empty ( $cart_item['line_tax'] ) ) {
                $cart_subtotal += $cart_item['line_tax'];
            }
        }
    }
    
    // If subtotal is less than first subtotal
    if ( $cart_subtotal < $min_subtotal_free_product_1 ) {
        // Free product 1 is already in cart, remove it
        if ( isset( $free_key_1 ) ) {
            $cart->remove_cart_item( $free_key_1 );
        }
        
        // Free product 2 is already in cart, remove it
        if ( isset( $free_key_2 ) ) {
            $cart->remove_cart_item( $free_key_2 );
        }
    }
    // If subtotal is between first and second subtotal
    elseif ( $cart_subtotal >= $min_subtotal_free_product_1 && $cart_subtotal < $min_subtotal_free_product_2 ) {
        // Free product 1 is not already in cart, add it
        if ( ! isset( $free_key_1 ) ) {
            $cart->add_to_cart( $free_product_id_1 );
        }
        
        // Free product 2 is in cart, remove it
        if ( isset( $free_key_2 ) ) {
            $cart->remove_cart_item( $free_key_2 );
        }
    }
    // If subtotal greater than or equal to second subtotal
    elseif ( $cart_subtotal > $min_subtotal_free_product_2 ) {
        // Free product 1 is already in cart, remove it
        if ( isset( $free_key_1 ) ) {
            $cart->remove_cart_item( $free_key_1 );
        }
        
        // Free product 2 is not already in cart, add it
        if ( ! isset( $free_key_2 ) ) {
            $cart->add_to_cart( $free_product_id_2 );
        }
    }   

    // Keep free product 1 quantity to 1.
    if ( isset( $free_qty_1 ) && $free_qty_1 > 1 ) {
        $cart->set_quantity( $free_key_1, 1 );
    }
    
    // Keep free product 2 quantity to 1.
    if ( isset( $free_qty_2 ) && $free_qty_2 > 1 ) {
        $cart->set_quantity( $free_key_2, 1 );
    }
}
add_action( 'woocommerce_before_calculate_totals', 'action_woocommerce_before_calculate_totals', 10, 1 );