购买带标签产品的Shopify“随购买礼物”脚本

Question

如果客户购买了150美元或更多的带标签产品，我尝试使用以下脚本向购物车添加免费礼物。例如，将$ 150的“沙漠之子”产品添加到购物车后，也会自动添加免费的礼品产品。

我知道此脚本仅添加带有“伴侣”产品的免费产品，但我想使用脚本的逻辑并对其进行调整以说：如果product.tag包含“沙漠之子”并且大于或等于$ 150，将免费礼物添加到购物车。

{% comment %}
  To add a companion product to the cart automatically if a primary 
  product is in cart:
  1. Create a new link list under your Navigation tab.
  2. In that link list, make the first link point to companion 
  product.
  3. Copy your link list handle where indicated at line 9
  4. Set the minimum cart total required for the bonus product on line 
  10
{% endcomment %}

{% assign linklist = linklists['put-your-link-list-handle-here'] %}
{% assign min_total = 100 %}

{% comment %}
  Youre done. Include this code in cart.liquid at the top or bottom.
{% endcomment %}

{% if linklist.links.size > 0 %}

  <script>!window.jQuery && document.write('<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"><\/script>')</script>

  <script>
    if (typeof Shopify === 'undefined') var Shopify = {};
    Shopify.cart = {{ cart | json }};
    Shopify.toAdd = {{ linklist.links.first.object.variants.first.id }};
    var pleaseAdd = false;
    var pleaseRemove = false;
    Shopify.idsInCart = [];

    for (var i=0; i<Shopify.cart.items.length; i++) {
      Shopify.idsInCart.push(Shopify.cart.items[i].id);

      if (Shopify.cart.items[i].id !== Shopify.toAdd) {
        if (Shopify.cart.total_price >= {{ min_total | times: 100 }}) {
          pleaseAdd = true;
        }
      } else { // Bonus item is in cart
        if (Shopify.cart.total_price < {{ min_total | times: 100 }}) {
          pleaseRemove = true;  
        }
      }
    }

    if (pleaseAdd && (jQuery.inArray(Shopify.toAdd, Shopify.idsInCart) === -1)) {
      var params = {
        type: 'POST',
        url: '/cart/add.js',
        data: 'quantity=1&id=' + Shopify.toAdd,
        dataType: 'json',
        success: function(line_item) { 
          window.location.href = '/cart';
        }
      }; 
      jQuery.ajax(params);
    } else if (pleaseRemove) {
      var params = {
        type: 'POST',
        url: '/cart/update.js',
        data: 'updates[' + Shopify.toAdd + ']=0',
        dataType: 'json',
        success: function(line_item) { 
          window.location.href = '/cart';
        }
      };
      jQuery.ajax(params);
    }
  </script>
{% endif %}