feat(medusa): Add difference due to OrderEdit totals (#2352)

packages/medusa/src/services/order-edit.ts

@@ -120,6 +120,7 @@ export default class OrderEditService extends TransactionBaseService {
     discount_total: number
     tax_total: number | null
     subtotal: number
+    difference_due: number
     total: number
   }> {
     const manager = this.transactionManager_ ?? this.manager_
@@ -127,6 +128,7 @@ export default class OrderEditService extends TransactionBaseService {
       select: ["id", "order_id", "items"],
       relations: ["items", "items.tax_lines", "items.adjustments"],
     })
+
     const order = await this.orderService_
       .withTransaction(manager)
       .retrieve(order_id, {
@@ -135,6 +137,9 @@ export default class OrderEditService extends TransactionBaseService {
           "discounts.rule",
           "gift_cards",
           "region",
+          "items",
+          "items.tax_lines",
+          "items.adjustments",
           "region.tax_rates",
           "shipping_methods",
           "shipping_methods.tax_lines",
@@ -152,6 +157,9 @@ export default class OrderEditService extends TransactionBaseService {
     const subtotal = await totalsServiceTx.getSubtotal(computedOrder)
     const total = await totalsServiceTx.getTotal(computedOrder)
 
+    const orderTotal = await totalsServiceTx.getTotal(order)
+    const difference_due = total - orderTotal
+
     return {
       shipping_total,
       gift_card_total,
@@ -160,6 +168,7 @@ export default class OrderEditService extends TransactionBaseService {
       tax_total,
       subtotal,
       total,
+      difference_due,
     }
   }
 
@@ -498,6 +507,7 @@ export default class OrderEditService extends TransactionBaseService {
     orderEdit.subtotal = totals.subtotal
     orderEdit.tax_total = totals.tax_total
     orderEdit.total = totals.total
+    orderEdit.difference_due = totals.difference_due
 
     return orderEdit
   }