Added Backend

backend/src/plugins/tenant.ts

@@ -0,0 +1,41 @@
+import { FastifyInstance, FastifyRequest } from "fastify";
+import fp from "fastify-plugin";
+
+export default fp(async (server: FastifyInstance) => {
+    server.addHook("preHandler", async (req, reply) => {
+        const host = req.headers.host?.split(":")[0]; // Domain ohne Port
+        if (!host) {
+            reply.code(400).send({ error: "Missing host header" });
+            return;
+        }
+        // Tenant aus DB laden
+        const { data: tenant } = await server.supabase
+            .from("tenants")
+            .select("*")
+            .eq("portalDomain", host)
+            .single();
+
+
+        if(!tenant) {
+            // Multi Tenant Mode
+            (req as any).tenant = null;
+        }else {
+            // Tenant ins Request-Objekt hängen
+            (req as any).tenant = tenant;
+        }
+
+    });
+});
+
+// Typ-Erweiterung
+declare module "fastify" {
+    interface FastifyRequest {
+        tenant?: {
+            id: string;
+            name: string;
+            domain?: string;
+            subdomain?: string;
+            settings?: Record<string, any>;
+        };
+    }
+}