feat(assignments): emit ADJUSTMENT movement on quantity change

src/use-cases/assignment.use-cases.ts

@@ -244,8 +244,17 @@ export async function updateAssignmentUseCase(
       return updateAssignmentError({ id: ["Assignment not found"] })
     }
 
+    if (
+      assignment.status === "RETURNED" ||
+      assignment.status === "CANCELLED"
+    ) {
+      return updateAssignmentError({ id: ["Assignment is closed"] })
+    }
+
+    let item = null
+
     if (itemId) {
-      const item = await ItemService.findById(itemId, tx)
+      item = await ItemService.findById(itemId, tx)
 
       if (!item) {
         return updateAssignmentError({ itemId: ["Item not found"] })
@@ -308,6 +317,22 @@ export async function updateAssignmentUseCase(
         tx,
       )
     } else {
+      if (item && assignment.quantity !== quantity) {
+        const stockDelta = quantity - (assignment.quantity ?? 0)
+        const adjustmentItemId = item.id
+        await ItemService.updateStock(adjustmentItemId, -stockDelta, tx)
+        await MovementService.create(
+          {
+            type: "ADJUSTMENT",
+            itemId: adjustmentItemId,
+            quantity: Math.abs(stockDelta),
+            stockDeltaSign: stockDelta < 0 ? 1 : -1,
+            userId: actorId,
+          },
+          tx,
+        )
+      }
+
       await AssignmentService.update(
         id,
         {