feat: add routes-b duplicate invoice endpoint

app/api/routes-b/invoices/[id]/duplicate/route.ts

@@ -0,0 +1,68 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { prisma } from '@/lib/db'
+import { verifyAuthToken } from '@/lib/auth'
+import { generateInvoiceNumber } from '@/lib/utils'
+
+export async function POST(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  const { id } = await params
+
+  const authToken = request.headers.get('authorization')?.replace('Bearer ', '')
+  const claims = await verifyAuthToken(authToken || '')
+  if (!claims) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+  }
+
+  const user = await prisma.user.findUnique({ where: { privyId: claims.userId } })
+  if (!user) {
+    return NextResponse.json({ error: 'User not found' }, { status: 404 })
+  }
+
+  const sourceInvoice = await prisma.invoice.findUnique({ where: { id } })
+  if (!sourceInvoice) {
+    return NextResponse.json({ error: 'Invoice not found' }, { status: 404 })
+  }
+
+  if (sourceInvoice.userId !== user.id) {
+    return NextResponse.json({ error: 'Forbidden' }, { status: 403 })
+  }
+
+  const invoiceNumber = generateInvoiceNumber()
+  const baseUrl = process.env.NEXT_PUBLIC_APP_URL || `https://${request.headers.get('host')}`
+  const paymentLink = `${baseUrl}/pay/${invoiceNumber}`
+
+  const duplicated = await prisma.invoice.create({
+    data: {
+      userId: user.id,
+      invoiceNumber,
+      paymentLink,
+      clientEmail: sourceInvoice.clientEmail,
+      clientName: sourceInvoice.clientName,
+      description: sourceInvoice.description,
+      amount: sourceInvoice.amount,
+      currency: sourceInvoice.currency,
+      status: 'pending',
+      dueDate: null,
+      paidAt: null,
+      cancelledAt: null,
+    },
+    select: {
+      id: true,
+      invoiceNumber: true,
+      clientEmail: true,
+      amount: true,
+      status: true,
+      paymentLink: true,
+    },
+  })
+
+  return NextResponse.json(
+    {
+      ...duplicated,
+      amount: Number(duplicated.amount),
+    },
+    { status: 201 },
+  )
+}