Added Helpdesk

Added M2M Auth

src/utils/helpers.ts

@@ -0,0 +1,56 @@
+// 🔧 Hilfsfunktionen
+import {FastifyInstance} from "fastify";
+
+export function extractDomain(email: string) {
+    if (!email) return null
+    const parts = email.split('@')
+    return parts.length === 2 ? parts[1].toLowerCase() : null
+}
+
+export async function findCustomerOrContactByEmailOrDomain(server:FastifyInstance, fromMail: string, tenantId: number) {
+    const sender = fromMail.toLowerCase()
+    const senderDomain = extractDomain(sender)
+    if (!senderDomain) return null
+
+    // 1️⃣ Direkter Match über contacts
+    const { data: contactMatch } = await server.supabase
+        .from('contacts')
+        .select('id, customer')
+        .eq('email', sender)
+        .eq('tenant', tenantId)
+        .maybeSingle()
+
+    if (contactMatch?.customer) {
+        return { customer: contactMatch.customer, contact: contactMatch.id }
+    }
+
+    // 2️⃣ Kunden nach Domain oder Rechnungs-E-Mail durchsuchen
+    const { data: customers, error } = await server.supabase
+        .from('customers')
+        .select('id, infoData')
+        .eq('tenant', tenantId)
+
+    if (error) {
+        server.log.error(`[Helpdesk] Fehler beim Laden der Kunden: ${error.message}`)
+        return null
+    }
+
+    for (const c of customers || []) {
+        const info = c.infoData || {}
+        const email = info.email?.toLowerCase()
+        const invoiceEmail = info.invoiceEmail?.toLowerCase()
+        const emailDomain = extractDomain(email)
+        const invoiceDomain = extractDomain(invoiceEmail)
+
+        if (
+            sender === email ||
+            sender === invoiceEmail ||
+            senderDomain === emailDomain ||
+            senderDomain === invoiceDomain
+        ) {
+            return { customer: c.id, contact: null }
+        }
+    }
+
+    return null
+}