Move all business logic to `lib`

It wasn't clear why certain business logic should live in `app/services`
while other should live in `lib`. By unifying everything in one directory,
we make it easier for developers to inspect the code and reduce the
cognitive load when implementing new classes.

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/solidus_subscriptions/subscription_line_item_builder.rb b/lib/solidus_subscriptions/subscription_line_item_builder.rb
new file mode 100644
index 0000000..7354102
--- /dev/null
+++ b/lib/solidus_subscriptions/subscription_line_item_builder.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module SolidusSubscriptions
+  module SubscriptionLineItemBuilder
+    private
+
+    def create_subscription_line_item(line_item)
+      SolidusSubscriptions::LineItem.create!(
+        subscription_params.merge(spree_line_item: line_item)
+      )
+
+      # Rerun the promotion handler to pickup subscription promotions
+      ::Spree::PromotionHandler::Cart.new(line_item.order).activate
+      line_item.order.recalculate
+    end
+
+    def subscription_params
+      params.require(:subscription_line_item).permit(
+        SolidusSubscriptions.configuration.subscription_line_item_attributes
+      )
+    end
+  end
+end