Added Backend

backend/src/modules/helpdesk/helpdesk.contact.service.ts

@@ -0,0 +1,38 @@
+// modules/helpdesk/helpdesk.contact.service.ts
+import { FastifyInstance } from 'fastify'
+
+export async function getOrCreateContact(
+    server: FastifyInstance,
+    tenant_id: number,
+    { email, phone, display_name, customer_id, contact_id }: { email?: string; phone?: string; display_name?: string; customer_id?: number; contact_id?: number }
+) {
+    if (!email && !phone) throw new Error('Contact must have at least an email or phone')
+
+    // Bestehenden Kontakt prüfen
+    const { data: existing, error: findError } = await server.supabase
+        .from('helpdesk_contacts')
+        .select('*')
+        .eq('tenant_id', tenant_id)
+        .or(`email.eq.${email || ''},phone.eq.${phone || ''}`)
+        .maybeSingle()
+
+    if (findError) throw findError
+    if (existing) return existing
+
+    // Anlegen
+    const { data: created, error: insertError } = await server.supabase
+        .from('helpdesk_contacts')
+        .insert({
+            tenant_id,
+            email,
+            phone,
+            display_name,
+            customer_id,
+            contact_id
+        })
+        .select()
+        .single()
+
+    if (insertError) throw insertError
+    return created
+}