Report full line item list for transactions

This sends the full list of line items in the order with their SKUs and
tax codes when creating/updating transactions in TaxJar.

2 files changed, 29 insertions, 1 deletions

diff --git a/lib/super_good/solidus_taxjar/api_params.rb b/lib/super_good/solidus_taxjar/api_params.rb
index b848eee..cb554a8 100644
--- a/lib/super_good/solidus_taxjar/api_params.rb
+++ b/lib/super_good/solidus_taxjar/api_params.rb
@@ -24,6 +24,7 @@ module SuperGood
         def transaction_params(order)
           {}
             .merge(order_address_params(order.tax_address))
+            .merge(transaction_line_items_params(order.line_items))
             .merge(
               transaction_id: order.number,
               transaction_date: order.completed_at.to_formatted_s(:iso8601),
@@ -74,6 +75,22 @@ module SuperGood
           }
         end
 
+        def transaction_line_items_params(line_items)
+          {
+            line_items: line_items.map do |line_item|
+              {
+                id: line_item.id,
+                quantity: line_item.quantity,
+                product_identifier: line_item.sku,
+                product_tax_code: line_item.tax_category&.tax_code,
+                unit_price: line_item.price,
+                discount: discount(line_item),
+                sales_tax: line_item.additional_tax_total
+              }
+            end
+          }
+        end
+
         def discount(line_item)
           ::SuperGood::SolidusTaxJar.discount_calculator.new(line_item).discount
         end
diff --git a/spec/super_good/solidus_taxjar/api_params_spec.rb b/spec/super_good/solidus_taxjar/api_params_spec.rb
index 8b0e9d0..abc8a23 100644
--- a/spec/super_good/solidus_taxjar/api_params_spec.rb
+++ b/spec/super_good/solidus_taxjar/api_params_spec.rb
@@ -64,12 +64,14 @@ RSpec.describe SuperGood::SolidusTaxJar::APIParams do
       variant: variant,
       price: 10,
       quantity: 3,
-      promo_total: -2
+      promo_total: -2,
+      additional_tax_total: 4
     )
   end
 
   let(:variant) do
     Spree::Variant.create!(
+      sku: "G00D-PR0DUCT",
       product: product,
       price: 10
     )
@@ -171,6 +173,15 @@ RSpec.describe SuperGood::SolidusTaxJar::APIParams do
        to_zip: "90210",
        transaction_date: "2018-03-06T12:10:33Z",
        transaction_id: "R111222333",
+       line_items: [{
+         id: line_item.id,
+         quantity: 3,
+         product_identifier: "G00D-PR0DUCT",
+         product_tax_code: "A_GEN_TAX",
+         unit_price: 10,
+         discount: 2,
+         sales_tax: 4
+       }]
       })
     end
   end