feat: add unique license number check for devices

shop/app/actions/checkout.ts

@@ -262,7 +262,8 @@ export async function checkoutAction(params: {
       );
       const itemsWithDevice = itemSnapshot.items.map(i => ({
         ...i,
-        device_name: item.deviceName
+        device_name: item.deviceName,
+        license_number: item.licenseNumber
       }));
       orderItemsList.push(...itemsWithDevice);
       total += itemSnapshot.total;

shop/app/api/orders/checkout/route.ts

@@ -90,7 +90,8 @@ export async function POST(request: Request) {
         );
         const itemsWithDevice = itemSnapshot.items.map(i => ({
           ...i,
-          device_name: item.deviceName
+          device_name: item.deviceName,
+          license_number: item.licenseNumber
         }));
         orderItemsList.push(...itemsWithDevice);
         total += itemSnapshot.total;

shop/components/order-wizard.tsx

@@ -6,6 +6,7 @@ import { AnimatePresence, motion } from 'framer-motion'
 import { Product, ProductModule, Profile, EndCustomer, Order } from '@/lib/types'
 import { submitOrder, updateOrder } from '@/lib/actions/orders'
 import { createEndCustomer } from '@/lib/actions/end-customers'
+import { isLicenseNumberTaken } from '@/lib/actions/queries'
 import { Category } from '@/lib/types'
 import { Check } from 'lucide-react'
 
@@ -166,6 +167,7 @@ export function OrderWizard({
     if (upgradeMode && lockedDeviceId) return `${lockedDeviceId} – Upgrade`
     return ''
   })
+  const [licenseNumber, setLicenseNumber] = useState<string>('')
   const [editingIdx, setEditingIdx] = useState<number | null>(null)
   const [orderNotes, setOrderNotes] = useState<string>('')
   const [toast, setToast] = useState<{ message: string; type: 'error' | 'success' } | null>(null)
@@ -593,9 +595,27 @@ export function OrderWizard({
     }
   }
 
-  const addToBasket = () => {
+  const addToBasket = async () => {
+    const normLicense = licenseNumber.trim().toUpperCase()
+    if (normLicense) {
+      const isDuplicateInBasket = basketItems.some(
+        (item, idx) => idx !== editingIdx && item.licenseNumber?.toUpperCase().trim() === normLicense
+      )
+      if (isDuplicateInBasket) {
+        setToast({ message: `Lizenznummer "${licenseNumber}" ist bereits im aktuellen Warenkorb vorhanden.`, type: 'error' })
+        return
+      }
+
+      const isTaken = await isLicenseNumberTaken(normLicense, initialOrder?.id)
+      if (isTaken) {
+        setToast({ message: `Lizenznummer "${licenseNumber}" wird bereits von einer anderen Bestellung verwendet.`, type: 'error' })
+        return
+      }
+    }
+
     const currentItem = {
       deviceName: deviceName || (editingIdx !== null ? basketItems[editingIdx]?.deviceName : `Kasse ${basketItems.length + 1}`),
+      licenseNumber: normLicense,
       selections: JSON.parse(JSON.stringify(selections)),
       moduleQuantities: { ...moduleQuantities },
       billingInterval: selectedBillingInterval,
@@ -614,6 +634,7 @@ export function OrderWizard({
 
     // Reset current form config
     setDeviceName('')
+    setLicenseNumber('')
     setModuleQuantities({})
     const resetSels: Record<string, CategorySelection> = {}
     categories.forEach(cat => {
@@ -636,6 +657,7 @@ export function OrderWizard({
     setSelections(item.selections)
     setModuleQuantities(item.moduleQuantities)
     setDeviceName(item.deviceName)
+    setLicenseNumber(item.licenseNumber || '')
     setSelectedBillingInterval(item.billingInterval)
   }
 
@@ -644,6 +666,7 @@ export function OrderWizard({
       setEditingIdx(null)
       setModuleQuantities({})
       setDeviceName('')
+      setLicenseNumber('')
 
       const resetSels: Record<string, CategorySelection> = {}
       categories.forEach(cat => {
@@ -668,8 +691,24 @@ export function OrderWizard({
     try {
       let finalItems = [...basketItems]
       if (hasActiveSelection && allCategoriesFilled && productValidationErrors.length === 0) {
+        const normLicense = licenseNumber.trim().toUpperCase()
+        if (normLicense) {
+          const isDuplicateInBasket = basketItems.some(
+            (item, idx) => idx !== editingIdx && item.licenseNumber?.toUpperCase().trim() === normLicense
+          )
+          if (isDuplicateInBasket) {
+            throw new Error(`Lizenznummer "${licenseNumber}" ist bereits im aktuellen Warenkorb vorhanden.`)
+          }
+
+          const isTaken = await isLicenseNumberTaken(normLicense, initialOrder?.id)
+          if (isTaken) {
+            throw new Error(`Lizenznummer "${licenseNumber}" wird bereits von einer anderen Bestellung verwendet.`)
+          }
+        }
+
         const currentItem = {
           deviceName: deviceName || (editingIdx !== null ? basketItems[editingIdx]?.deviceName : `Kasse ${basketItems.length + 1}`),
+          licenseNumber: normLicense,
           selections: JSON.parse(JSON.stringify(selections)),
           moduleQuantities: { ...moduleQuantities },
           billingInterval: selectedBillingInterval,
@@ -685,6 +724,20 @@ export function OrderWizard({
         throw new Error('Bitte konfigurieren Sie mindestens eine Kasse.')
       }
 
+      // Check all license numbers in finalItems for duplicates
+      const licenseNumbers = finalItems.map(item => item.licenseNumber?.toUpperCase().trim()).filter(Boolean)
+      const uniqueLicenses = new Set(licenseNumbers)
+      if (uniqueLicenses.size !== licenseNumbers.length) {
+        throw new Error('Eine Lizenznummer darf im Warenkorb nicht mehrfach verwendet werden.')
+      }
+
+      for (const lic of uniqueLicenses) {
+        const isTaken = await isLicenseNumberTaken(lic, initialOrder?.id)
+        if (isTaken) {
+          throw new Error(`Die Lizenznummer "${lic}" wird bereits von einer anderen Bestellung verwendet.`)
+        }
+      }
+
       const res = await fetch('/api/orders/checkout', {
         method: 'POST',
         headers: {
@@ -1002,6 +1055,8 @@ export function OrderWizard({
                     deleteBasketItem={deleteBasketItem}
                     deviceName={deviceName}
                     setDeviceName={setDeviceName}
+                    licenseNumber={licenseNumber}
+                    setLicenseNumber={setLicenseNumber}
                     addToBasket={addToBasket}
                     isNextStepDisabled={isNextStepDisabled}
                     hasActiveSelection={hasActiveSelection}

shop/components/wizard/summary-sidebar.tsx

@@ -32,6 +32,8 @@ interface SummarySidebarProps {
   deleteBasketItem: (idx: number) => void
   deviceName: string
   setDeviceName: (name: string) => void
+  licenseNumber: string
+  setLicenseNumber: (num: string) => void
   addToBasket: () => void
   isNextStepDisabled: boolean
   hasActiveSelection: boolean
@@ -62,6 +64,8 @@ export function SummarySidebar({
   deleteBasketItem,
   deviceName,
   setDeviceName,
+  licenseNumber,
+  setLicenseNumber,
   addToBasket,
   isNextStepDisabled,
   hasActiveSelection,
@@ -231,7 +235,10 @@ export function SummarySidebar({
                   <div key={idx} className={`flex justify-between items-center text-xs bg-white/5 p-2 rounded border transition-all duration-300 ${idx === editingIdx ? 'border-blue-500/50 shadow-[0_0_10px_rgba(59,130,246,0.3)]' : 'border-white/10'}`}>
                     <div className="flex flex-col">
                       <span className="text-white font-medium">{item.deviceName}</span>
-                      <span className="text-[10px] text-slate-400 capitalize">{item.billingInterval === 'one_time' ? 'Kauf' : 'Abo'}</span>
+                      <span className="text-[10px] text-slate-400 capitalize">
+                        {item.billingInterval === 'one_time' ? 'Kauf' : 'Abo'}
+                        {item.licenseNumber ? ` · Lizenz: ${item.licenseNumber}` : ''}
+                      </span>
                     </div>
                     <div className="flex items-center gap-1.5">
                       <Button
@@ -272,6 +279,16 @@ export function SummarySidebar({
               className="bg-white/5 border-white/10 text-white text-xs h-9 rounded-lg"
             />
           </div>
+          <div className="w-full space-y-2">
+            <Label htmlFor="license-number" className="text-xs text-slate-400">Lizenznummer (optional)</Label>
+            <Input
+              id="license-number"
+              placeholder="z.B. LIZ-12345"
+              value={licenseNumber}
+              onChange={e => setLicenseNumber(e.target.value)}
+              className="bg-white/5 border-white/10 text-white text-xs h-9 rounded-lg"
+            />
+          </div>
           <Button
             type="button"
             variant="outline"

shop/lib/actions/queries.ts

@@ -260,4 +260,29 @@ export async function getCustomersForWizard(
   }
 }
 
+/**
+ * Checks if a license number is already taken by any active order.
+ */
+export async function isLicenseNumberTaken(licenseNumber: string, excludeOrderId?: string): Promise<boolean> {
+  const normalized = licenseNumber?.trim().toUpperCase()
+  if (!normalized) return false
+
+  const supabase = await createClient()
+  let query = supabase
+    .from('orders')
+    .select('id')
+    .contains('order_snapshot', { items: [{ license_number: normalized }] })
+
+  if (excludeOrderId) {
+    query = query.neq('id', excludeOrderId)
+  }
+
+  const { data, error } = await query
+  if (error) {
+    console.error('Error checking license number:', error)
+    return false
+  }
+  return !!(data && data.length > 0)
+}
+