feat: add code gen to credit note

prisma/schema.prisma

@@ -1582,6 +1582,8 @@ enum CreditNoteStatus {
 model CreditNote {
   id String @id @default(cuid())
 
+  code String
+
   creditNoteStatus CreditNoteStatus @default(Pending)
 
   value Float @default(0)

src/controllers/08-credit-note-controller.ts

@@ -261,7 +261,25 @@ export class CreditNoteController extends Controller {
       return a + c.productService.product.price;
     }, 0);
 
-    const record = await prisma.creditNote.create({
+    this.setStatus(HttpStatus.CREATED);
+
+    return await prisma.$transaction(
+      async (tx) => {
+        const currentYear = new Date().getFullYear();
+        const currentMonth = new Date().getMonth() + 1;
+
+        const last = await tx.runningNo.upsert({
+          where: {
+            key: `CREDIT_NOTE_${currentYear.toString().padStart(2, "0")}${currentMonth.toString().padStart(2, "0")}`,
+          },
+          create: {
+            key: `CREDIT_NOTE_${currentYear.toString().padStart(2, "0")}${currentMonth.toString().padStart(2, "0")}`,
+            value: 1,
+          },
+          update: { value: { increment: 1 } },
+        });
+
+        return await prisma.creditNote.create({
           include: {
             requestWork: {
               include: {
@@ -271,6 +289,7 @@ export class CreditNoteController extends Controller {
             quotation: true,
           },
           data: {
+            code: `CN${currentYear.toString().padStart(2, "0")}${currentMonth.toString().padStart(2, "0")}${last.value.toString().padStart(6, "0")}`,
             value,
             requestWork: {
               connect: body.requestWorkId.map((v) => ({
@@ -280,10 +299,9 @@ export class CreditNoteController extends Controller {
             quotationId: body.quotationId,
           },
         });
-
+      },
-    this.setStatus(HttpStatus.CREATED);
+      { isolationLevel: Prisma.TransactionIsolationLevel.Serializable },
-
+    );
-    return record;
   }
 
   @Put("{creditNoteId}")