Send tax receipts for donations, with Mechanic.

{% if options.run_on_order_creation_instead_of_paid__boolean %}
  shopify/orders/create
{% else %}
  shopify/orders/paid
{% endif %}
mechanic/user/order

{% assign tax_id = options.tax_id__required %}
{% comment %}{{ options.run_on_order_creation_instead_of_paid__boolean }}{% endcomment %}
{% assign donation_product_tags = options.identify_donation_products_with_any_of_these_tags__array %}
{% assign donation_product_titles = options.identify_donation_products_with_any_of_these_titles__array %}
{% assign send_cc_to_shop_email = options.send_cc_to_shop_email__boolean %}
{% assign email_subject = options.email_subject__required %}
{% assign email_body = options.email_body__multiline_required %}
{% assign donation_receipt_filename = options.donation_receipt_filename__required %}
{% assign donation_reciept_html_template = options.donation_reciept_html_template__code_multiline_required %}

{% if donation_product_tags == blank and donation_product_titles == blank %}
  {% error "Enter at least one product tag or title to filter on." %}
{% endif %}

{% if event.topic == "shopify/orders/paid"
  or event.topic == "shopify/orders/create"
  or event.topic == "mechanic/user/order"
%}
  {% if order.email == blank %}
    {% log "This order does not have an email associated with it." %}
    {% break %}
  {% endif %}

  {% comment %}
    -- get the order data to see if there are any donation products on this order, by product tag or title
  {% endcomment %}

  {% capture query %}
    query {
      order(id: {{ order.admin_graphql_api_id | json }}) {
        id
        presentmentCurrencyCode
        lineItems(first: 100) {
          nodes {
            product {
              tags
              title
            }
            originalTotalSet {
              presentmentMoney {
                amount
              }
            }
          }
        }
      }
    }
  {% endcapture %}

  {% assign result = query | shopify %}

  {% if event.preview %}
    {% capture result_json %}
      {
        "data": {
          "order": {
            "presentmentCurrencyCode": "USD",
            "lineItems": {
              "nodes": [
                {
                  "product": {
                    "tags": {{ donation_product_tags.first | json }},
                    "title": {{ donation_product_titles.first | json }}
                  },
                  "originalTotalSet": {
                    "presentmentMoney": {
                      "amount": "100.0"
                    }
                  }
                }
              ]
            }
          }
        }
      }
    {% endcapture %}

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

  {% comment %}
    -- for any donation products, add the non-discounted total for that line item to the runnning donation amount
  {% endcomment %}

  {% assign donation_amount = 0 %}

  {% for line_item in result.data.order.lineItems.nodes %}
    {% assign is_donation_product = nil %}

    {% for donation_product_tag in donation_product_tags %}
      {% if line_item.product.tags contains donation_product_tag %}
        {% assign is_donation_product = true %}
        {% break %}
      {% endif %}
    {% endfor %}

    {% for donation_product_title in donation_product_titles %}
      {% if line_item.product.title == donation_product_title %}
        {% assign is_donation_product = true %}
        {% break %}
      {% endif %}
    {% endfor %}

    {% if is_donation_product %}
      {% assign donation_amount = donation_amount | plus: line_item.originalTotalSet.presentmentMoney.amount %}
    {% endif %}
  {% endfor %}

  {% unless donation_amount > 0 %}
    {% log "This order has no donation products on it; skipping" %}
    {% break %}
  {% endunless %}

  {% assign donation_with_currency = donation_amount | currency: result.data.order.presentmentCurrencyCode %}

  {% comment %}
    -- replace variables in the HTML template for the configured tax ID and the calculated donation amount
  {% endcomment %}

  {% assign donation_html
    = donation_reciept_html_template
    | replace: "[TAX_ID]", tax_id
    | replace: "[DONATION_AMOUNT]", donation_with_currency
  %}

  {% comment %}
    -- generate tax receipt as a PDF and attach to email to donor; optionally cc the shop email address
  {% endcomment %}

  {% action "email" %}
    {
      "to": {{ order.email | json }},
      "subject": {{ email_subject | json }},
      "body": {{ email_body | newline_to_br | json }},
      {% if send_cc_to_shop_email %}"cc": {{ shop.customer_email | json }},{% endif %}
      "reply_to": {{ shop.customer_email | json }},
      "from_display_name": {{ shop.name | json }},
      "attachments": {
        {{ donation_receipt_filename | remove: "#" | json }}: {
          "pdf": {
            "html": {{ donation_html | json }},
            "__force_pdfcrowd": true
          }
        }
      }
    }
  {% endaction %}
{% endif %}