migrate to nextjs

app/api/contact/route.ts

@@ -0,0 +1,56 @@
+import { NextResponse } from 'next/server';
+import * as nodemailer from 'nodemailer';
+
+export async function POST(req: Request) {
+  try {
+    const { name, email, company, message, website } = await req.json();
+
+    // Honeypot check
+    if (website) {
+      console.log('Spam detected (honeypot)');
+      return NextResponse.json({ message: 'Ok' });
+    }
+
+    // Validation
+    if (!name || name.length < 2 || name.length > 100) {
+      return NextResponse.json({ error: 'Ungültiger Name' }, { status: 400 });
+    }
+    if (!email || !/^\S+@\S+\.\S+$/.test(email)) {
+      return NextResponse.json({ error: 'Ungültige E-Mail' }, { status: 400 });
+    }
+    if (!message || message.length < 20 || message.length > 4000) {
+      return NextResponse.json({ error: 'Nachricht zu kurz oder zu lang' }, { status: 400 });
+    }
+
+    const transporter = nodemailer.createTransport({
+      host: process.env.SMTP_HOST,
+      port: parseInt(process.env.SMTP_PORT || '587'),
+      secure: process.env.SMTP_SECURE === 'true',
+      auth: {
+        user: process.env.SMTP_USER,
+        pass: process.env.SMTP_PASS,
+      },
+    });
+
+    await transporter.sendMail({
+      from: process.env.SMTP_FROM,
+      to: process.env.CONTACT_RECIPIENT,
+      replyTo: email,
+      subject: `Kontaktanfrage von ${name}`,
+      text: `
+Name: ${name}
+Firma: ${company || 'Nicht angegeben'}
+E-Mail: ${email}
+Zeitpunkt: ${new Date().toISOString()}
+
+Nachricht:
+${message}
+      `,
+    });
+
+    return NextResponse.json({ message: 'Ok' });
+  } catch (error) {
+    console.error('SMTP Error:', error);
+    return NextResponse.json({ error: 'Interner Serverfehler' }, { status: 500 });
+  }
+}