serial numbers

Frontend/erp-system/lib/validations/grn.ts

@@ -3,7 +3,7 @@
 // (over-receipt tolerance, referential existence, concurrency) are never
 // re-implemented here; the server's ProblemDetails is the final word (§3.3).
 import { z } from "zod"
-import { Warranty } from "@/types/master-data"
+import { TrackingMode, Warranty } from "@/types/master-data"
 
 export const grnHeaderSchema = z.object({
   warehouseId: z.number({ error: "Select a warehouse" }).positive("Select a warehouse"),
@@ -18,6 +18,9 @@ export function validateLine(input: {
   discountPct: string
   vatPct: string
   warranty: Warranty | null
+  trackingMode: TrackingMode | null
+  batchNo: string
+  /** Per-unit numbers: serial numbers for a Serial item, else warranty numbers for a Warranty item. */
   warrantyNumbers: string[]
 }): Record<string, string> {
   const errors: Record<string, string> = {}
@@ -38,14 +41,20 @@ export function validateLine(input: {
   if (input.vatPct !== "" && (Number.isNaN(vatPct) || vatPct < 0 || vatPct > 100))
     errors.vatPct = "VAT must be 0–100%"
 
-  if (input.warranty === "Warranty") {
+  if (input.trackingMode === "Batch" && !input.batchNo.trim()) errors.batchNo = "Enter the batch number"
+
+  const serial = input.trackingMode === "Serial"
+  if (serial && !Number.isNaN(qty) && !Number.isInteger(qty)) errors.qty = "Serial-tracked items are received in whole units"
+
+  if (serial || input.warranty === "Warranty") {
+    const label = serial ? "serial number" : "warranty number"
     const numbers = input.warrantyNumbers.map((s) => s.trim()).filter((s) => s.length > 0)
     if (numbers.length === 0) {
-      errors.warrantyNumbers = "Enter one warranty number per unit"
+      errors.warrantyNumbers = `Enter one ${label} per unit`
     } else if (!Number.isNaN(qty) && numbers.length !== qty) {
-      errors.warrantyNumbers = `Enter exactly ${qty || 0} warranty number(s) — got ${numbers.length}`
+      errors.warrantyNumbers = `Enter exactly ${qty || 0} ${label}(s) — got ${numbers.length}`
     } else if (new Set(numbers.map((s) => s.toLowerCase())).size !== numbers.length) {
-      errors.warrantyNumbers = "Warranty numbers must be unique"
+      errors.warrantyNumbers = `${serial ? "Serial" : "Warranty"} numbers must be unique`
     }
   }