script.liquid

{% assign product_title = options.product_title__required %}
{% assign email_address = options.email_address__required %}
{% assign email_subject = options.email_subject__required %}
{% assign email_body = options.email_body__multiline_required %}
{% assign reply_to_email_address = options.reply_to_email_address %}

{% comment %}
  -- requery the order in case a delay is configured in the task
{% endcomment %}

{% capture query %}
  query {
    order(id: {{ order.admin_graphql_api_id | json }}) {
      id
      cancelledAt
      lineItems(first: 250) {
        nodes {
          title
        }
      }
    }
  }
{% endcapture %}

{% assign result = query | shopify %}

{% if event.preview %}
  {% capture result_json %}
    {
      "data": {
        "order": {
          "id": "gid://shopify/Order/1234567890",
          "lineItems": {
            "nodes": [
              {
                "title": {{ product_title | json }}
              }
            ]
          }
        }
      }
    }
  {% endcapture %}

  {% assign result = result_json | parse_json %}
{% endif %}

{% assign order = result.data.order %}

{% comment %}
  -- don't send notification email if the order has been cancelled
{% endcomment %}

{% if order.cancelledAt != blank %}
  {% break %}
{% endif %}

{% comment %}
  -- send notification email if any line item contains the configured product title
{% endcomment %}

{% for line_item in order.lineItems.nodes %}
  {% if line_item.title == product_title %}
    {% action "email" %}
      {
        "to": {{ email_address | json }},
        "subject": {{ email_subject | json }},
        "body": {{ email_body | strip | newline_to_br | json }},
        "reply_to": {{ reply_to_email_address | default: shop.customer_email | json }},
        "from_display_name": {{ shop.name | json }}
      }
    {% endaction %}

    {% break %}
  {% endif %}
{% endfor %}