feat: line item adjustments (#1319)

* add: crud services + model + totals

* fix: enforce unique constraint on line item adjustment model and update service (#1241)

* add: unique constraint on model + fix service

* fix: unique constraint

* fix: add cascade on delete + fix discount relation

* fix: remove optional unique prop

* add: tests for ensuring line item adjustment db constraints (#1279)

* add: tests for ensuring db constraints

* fix: use given when then

* feat: adjust cart to include line item adjustments (#1242)

* fix: cart service + cart tests

* fix: remaining tests

* fix: swap tests

* fix: add relationship + fix oas

* refactor: applyDiscount

* fix: refactor applyDiscount and fix + add unit tests

* fix: plugins tests

* feat: line item adjustments draft orders (#1243)

* fix: draft order tests

* fix: constraint

* fix: wrong variable name

* fix: unique constraint

* progress: add tests

* fix: add cascade on delete + fix discount relation

* fix: remove optional unique prop

* fix: cart removeLineItem + tests

* fix: cart unit tests

* fix: update snapshot

* remove: verbose option

* rename arg

Co-authored-by: Sebastian Rindom <skrindom@gmail.com>

* add: create adjustments for swap additional_items

* add: create adjustments for return lines

* fix: unit test for creating adjustment for additional_items

* fix: create adjustments only for non return items + no deletion when item is a return item

* add: integration tests

* refactor: use refreshAdjustments method

* refactor test

Co-authored-by: Sebastian Rindom <skrindom@gmail.com>

Co-authored-by: Sebastian Rindom <skrindom@gmail.com>

Co-authored-by: Sebastian Rindom <skrindom@gmail.com>

integration-tests/api/factories/simple-line-item-factory.ts

@@ -1,6 +1,6 @@
 import { Connection } from "typeorm"
 import faker from "faker"
-import { LineItem, LineItemTaxLine } from "@medusajs/medusa"
+import { LineItem, LineItemAdjustment, LineItemTaxLine } from "@medusajs/medusa"
 
 type TaxLineFactoryData = {
   rate: number
@@ -8,6 +8,11 @@ type TaxLineFactoryData = {
   name: string
 }
 
+type LineItemAdjustmentFactoryData = Omit<LineItemAdjustment, "discount_id"> & {
+  discount_id: string
+  discount_code: string
+}
+
 export type LineItemFactoryData = {
   id?: string
   cart_id?: string
@@ -24,6 +29,7 @@ export type LineItemFactoryData = {
   shipped_quantity?: boolean
   returned_quantity?: boolean
   tax_lines?: TaxLineFactoryData[]
+  adjustments: LineItemAdjustmentFactoryData[]
 }
 
 export const simpleLineItemFactory = async (
@@ -63,6 +69,7 @@ export const simpleLineItemFactory = async (
     fulfilled_quantity: data.fulfilled_quantity || null,
     shipped_quantity: data.shipped_quantity || null,
     returned_quantity: data.returned_quantity || null,
+    adjustments: data.adjustments,
   })
 
   const line = await manager.save(toSave)

integration-tests/api/factories/simple-order-factory.ts

@@ -101,7 +101,17 @@ export const simpleOrderFactory = async (
     await simpleShippingMethodFactory(connection, { ...sm, order_id: order.id })
   }
 
-  const items = data.line_items
+  const items = data.line_items.map((item) => {
+    let adjustments = item?.adjustments || []
+    return {
+      ...item,
+      adjustments: adjustments.map((adj) => ({
+        ...adj,
+        discount_id: discounts.find((d) => d.code === adj?.discount_code),
+      })),
+    }
+  })
+
   for (const item of items) {
     await simpleLineItemFactory(connection, { ...item, order_id: id })
   }