script.liquid

{% assign order_qualifies = false %}

{% if order.note != blank %}
  {% unless order.customer.note contains order.note %}
    {% assign order_qualifies = true %}
  {% endunless %}
{% endif %}

{% if event.preview or order_qualifies %}
  {% assign new_order_note = order.customer.note | append: newline | append: newline | append: options.note_prefix | append: order.note | strip %}

  {% if event.preview or new_order_note.size <= 5000 %}
    {% action "shopify" %}
      [
        "update",
        [
          "customer",
          {{ order.customer.id | json }}
        ],
        {
          "note": {{ new_order_note | json }}
        }
      ]
    {% endaction %}
  {% else %}
    {% capture error_body %}
      Hello,
          
      Mechanic was unable to add to the customer note for the following customer, for the following related order:

      Customer: https://{{ shop.domain }}/admin/customers/{{ order.customer.id }}
      Order: https://{{ shop.domain }}/admin/orders/{{ order.id }}

      Thanks,
      Mechanic
    {% endcapture %}

    {% action "email" %}
      {
        "to": {{ shop.email | json }},
        "subject": {{ "Mechanic error: customer note too long for order " | append: order.name | json }},
        "body": {{ error_body | unindent | strip | newline_to_br | json }},
        "reply_to": {{ shop.customer_email | json }},
        "from_display_name": {{ shop.name | json }}
      }
    {% endaction %}
  {% endif %}
{% endif %}