script.liquid

{% capture query %}
  query {
    customer(id: {{ customer.admin_graphql_api_id | json }}) {
      id
      events(first: 250) {
        edges {
          node {
            attributeToUser
            message
          }
        }
      }
    }
  }
{% endcapture %}

{% assign result = query | shopify %}

{% assign placed_event = result.data.first.last.events.edges | map: "node" | where: "attributeToUser" | first %}
{% assign name = placed_event.message | split: " created this " | first %}
{% assign tag_to_add = options.staff_names_and_tags__keyval_required[name] %}

{% if event.preview %}
  {% assign name = options.staff_names_and_tags__keyval_required.first.first %}
  {% assign tag_to_add = options.staff_names_and_tags__keyval_required.first.last %}
{% endif %}

{% if name == blank %}
  {% log message: "No staff member detected.", customer: result.data.first.last %}
{% elsif tag_to_add == blank %}
  {% log message: "No tag applicable for staff member.", staff_member: name %}
{% else %}
  {% action "shopify" %}
    mutation {
      tagsAdd(
        id: {{ customer.admin_graphql_api_id | json }}
        tags: {{ tag_to_add | json }}
      ) {
        userErrors {
          field
          message
        }
      }
    }
  {% endaction %}
{% endif %}