MC-20639: MyAccount :: Order Details :: Refund (creditMemo) Details by Order Number

Author: cpartica

app/code/Magento/BundleGraphQl/etc/schema.graphqls

@@ -100,6 +100,10 @@ type BundleShipmentItem implements ShipmentItemInterface {
     bundle_options: [ItemSelectedBundleOption] @doc(description: "A list of bundle options that are assigned to the bundle product") @resolver(class: "Magento\\BundleGraphQl\\Model\\Resolver\\Order\\Item\\BundleOptions")
 }
 
+type BundleCreditMemoItem implements CreditMemoItemInterface {
+    bundle_options: [ItemSelectedBundleOption] @doc(description: "A list of bundle options that are assigned to the bundle product")
+}
+
 type ItemSelectedBundleOption @doc(description: "A list of options of the selected bundle product") {
     id: ID! @doc(description: "The unique identifier of the option")
     label: String! @doc(description: "The label of the option")

app/code/Magento/SalesGraphQl/Model/Resolver/CreditMemo/CreditMemoItems.php

@@ -123,7 +123,36 @@ private function getCreditMemoItemData(OrderInterface $order, CreditmemoItemInte
             ],
             'quantity_refunded' => $creditMemoItem->getQty(),
             'model' => $creditMemoItem,
-            'product_type' => $orderItem['product_type']
+            'product_type' => $orderItem['product_type'],
+            'discounts' => $this->formatDiscountDetails($order, $creditMemoItem)
         ];
     }
+
+    /**
+     * Returns formatted information about an applied discount
+     *
+     * @param OrderInterface $associatedOrder
+     * @param CreditmemoItemInterface $creditmemoItem
+     * @return array
+     */
+    private function formatDiscountDetails(
+        OrderInterface $associatedOrder,
+        CreditmemoItemInterface $creditmemoItem
+    ) : array {
+        if ($associatedOrder->getDiscountDescription() === null
+            && $creditmemoItem->getDiscountAmount() == 0
+            && $associatedOrder->getDiscountAmount() == 0
+        ) {
+            $discounts = [];
+        } else {
+            $discounts[] = [
+                'label' => $associatedOrder->getDiscountDescription() ?? _('Discount'),
+                'amount' => [
+                    'value' => abs($creditmemoItem->getDiscountAmount()) ?? 0,
+                    'currency' => $associatedOrder->getOrderCurrencyCode()
+                ]
+            ];
+        }
+        return $discounts;
+    }
 }

app/code/Magento/SalesGraphQl/etc/schema.graphqls

@@ -217,16 +217,13 @@ interface CreditMemoItemInterface @doc(description: "Credit memo item details")
     product_name: String @doc(description: "The name of the base product")
     product_sku: String! @doc(description: "SKU of the base product")
     product_sale_price: Money! @doc(description: "The sale price for the base product, including selected options")
+    discounts: [Discount] @doc(description: "Contains information about the final discount amount for the base product, including discounts on options")
     quantity_refunded: Float @doc(description: "The number of refunded items")
 }
 
 type CreditMemoItem implements CreditMemoItemInterface {
 }
 
-type BundleCreditMemoItem implements CreditMemoItemInterface {
-    bundle_options: [ItemSelectedBundleOption] @doc(description: "A list of bundle options that are assigned to the bundle product")
-}
-
 type CreditMemoTotal @doc(description: "Credit memo price details") {
     subtotal: Money! @doc(description: "The subtotal of the invoice, excluding shipping, discounts, and taxes")
     discounts: [Discount] @doc(description: "The applied discounts to the credit memo")