first commit

app/api/mqtt/credentials/route.ts

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+// API Route für MQTT Credentials Management
+import { NextRequest, NextResponse } from 'next/server';
+import { auth } from '@/lib/auth';
+import { mqttCredentialDb, mqttAclRuleDb } from '@/lib/mqtt-db';
+import { deviceDb } from '@/lib/db';
+import { hashPassword } from '@/lib/mosquitto-sync';
+import { randomBytes } from 'crypto';
+
+/**
+ * GET /api/mqtt/credentials
+ * Liste alle MQTT Credentials
+ */
+export async function GET() {
+  try {
+    const session = await auth();
+    if (!session?.user || (session.user as any).role !== 'ADMIN') {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const userId = (session.user as any).id;
+    const credentials = mqttCredentialDb.findAll();
+
+    // Filter credentials to only show user's devices
+    const credentialsWithDevices = credentials
+      .map(cred => {
+        const device = deviceDb.findById(cred.device_id);
+        return {
+          ...cred,
+          device_name: device?.name || 'Unknown Device',
+          device_owner: device?.ownerId
+        };
+      })
+      .filter(cred => cred.device_owner === userId);
+
+    return NextResponse.json(credentialsWithDevices);
+  } catch (error) {
+    console.error('Failed to fetch MQTT credentials:', error);
+    return NextResponse.json(
+      { error: 'Failed to fetch credentials' },
+      { status: 500 }
+    );
+  }
+}
+
+/**
+ * POST /api/mqtt/credentials
+ * Erstelle neue MQTT Credentials für ein Device
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const session = await auth();
+    if (!session?.user || (session.user as any).role !== 'ADMIN') {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const body = await request.json();
+    const { device_id, mqtt_username, mqtt_password, auto_generate } = body;
+
+    // Validierung
+    if (!device_id) {
+      return NextResponse.json(
+        { error: 'device_id is required' },
+        { status: 400 }
+      );
+    }
+
+    // Prüfe ob Device existiert
+    const device = deviceDb.findById(device_id);
+    if (!device) {
+      return NextResponse.json(
+        { error: 'Device not found' },
+        { status: 404 }
+      );
+    }
+
+    // Prüfe ob bereits Credentials existieren
+    const existing = mqttCredentialDb.findByDeviceId(device_id);
+    if (existing) {
+      return NextResponse.json(
+        { error: 'MQTT credentials already exist for this device' },
+        { status: 409 }
+      );
+    }
+
+    // Generiere oder verwende übergebene Credentials
+    let username = mqtt_username;
+    let password = mqtt_password;
+
+    if (auto_generate || !username) {
+      // Generiere Username: device_[device-id]_[random]
+      username = `device_${device_id}_${randomBytes(4).toString('hex')}`;
+    }
+
+    if (auto_generate || !password) {
+      // Generiere sicheres Passwort
+      password = randomBytes(16).toString('base64');
+    }
+
+    // Hash Passwort
+    const password_hash = await hashPassword(password);
+
+    // Erstelle Credentials
+    const credential = mqttCredentialDb.create({
+      device_id,
+      mqtt_username: username,
+      mqtt_password_hash: password_hash,
+      enabled: 1
+    });
+
+    // Erstelle Default ACL Regel
+    mqttAclRuleDb.createDefaultRule(device_id);
+
+    return NextResponse.json({
+      ...credential,
+      // Sende Plaintext-Passwort nur bei Erstellung zurück
+      mqtt_password: password,
+      device_name: device.name
+    }, { status: 201 });
+  } catch (error) {
+    console.error('Failed to create MQTT credentials:', error);
+    return NextResponse.json(
+      { error: 'Failed to create credentials' },
+      { status: 500 }
+    );
+  }
+}