From ac9ecdfcbc5e77f6ca8fee91313cf74f7f508fc3 Mon Sep 17 00:00:00 2001
From: Matt-Yorkley <9029026+Matt-Yorkley@users.noreply.github.com>
Date: Sun, 7 Feb 2021 13:07:33 +0000
Subject: [PATCH] Introduce Spree::ItemAdjustments class

---
 app/models/spree/item_adjustments.rb | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 app/models/spree/item_adjustments.rb

diff --git a/app/models/spree/item_adjustments.rb b/app/models/spree/item_adjustments.rb
new file mode 100644
index 0000000000..c6cb1238c4
--- /dev/null
+++ b/app/models/spree/item_adjustments.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module Spree
+  # Manage (recalculate) item (LineItem or Shipment) adjustments
+  class ItemAdjustments
+    attr_reader :item
+
+    delegate :adjustments, :order, to: :item
+
+    def initialize(item)
+      @item = item
+    end
+
+    def update
+      update_adjustments if item.persisted?
+      item
+    end
+
+    def update_adjustments
+      adjustment_total = adjustments.map(&:update!).compact.sum
+
+      item.update_columns(
+        adjustment_total: adjustment_total,
+        updated_at: Time.zone.now
+      )
+    end
+  end
+end