add

src/app/(main)/api/auth/signup/route.ts

@@ -8,6 +8,7 @@ import { rateLimit, getClientIdentifier, RateLimits } from '@/lib/rateLimit';
 import { getAuthCookieOptions } from '@/lib/cookieConfig';
 import { signupSchema, validateRequest } from '@/lib/validationSchemas';
 import { sendWelcomeEmail } from '@/lib/email';
+import { sendConversionEvent } from '@/lib/meta';
 
 export async function POST(request: NextRequest) {
   try {
@@ -82,6 +83,19 @@ export async function POST(request: NextRequest) {
       console.error('Welcome email failed:', emailError);
     }
 
+    // Meta Conversions API — CompleteRegistration event
+    sendConversionEvent({
+      eventName: 'CompleteRegistration',
+      userData: {
+        email: user.email,
+        ip: request.headers.get('x-forwarded-for')?.split(',')[0] ?? undefined,
+        userAgent: request.headers.get('user-agent') ?? undefined,
+        fbc: request.cookies.get('_fbc')?.value,
+        fbp: request.cookies.get('_fbp')?.value,
+      },
+      eventSourceUrl: `${process.env.NEXT_PUBLIC_APP_URL}/signup`,
+    }).catch(console.error);
+
     // Create response
     const response = NextResponse.json({
       success: true,

src/app/(main)/api/stripe/webhook/route.ts

@@ -3,6 +3,7 @@ import { headers } from 'next/headers';
 import { stripe } from '@/lib/stripe';
 import { db } from '@/lib/db';
 import Stripe from 'stripe';
+import { sendConversionEvent } from '@/lib/meta';
 
 export async function POST(request: NextRequest) {
   const body = await request.text();
@@ -49,7 +50,7 @@ export async function POST(request: NextRequest) {
             ? new Date(periodEndTimestamp * 1000)
             : new Date(Date.now() + 30 * 24 * 60 * 60 * 1000);
 
-          await db.user.update({
+          const updatedUser = await db.user.update({
             where: {
               stripeCustomerId: session.customer as string,
             },
@@ -60,6 +61,22 @@ export async function POST(request: NextRequest) {
               plan: (session.metadata?.plan || 'FREE') as any,
             },
           });
+
+          // Meta CAPI — Purchase event
+          const amountCents = session.amount_total ?? 0;
+          sendConversionEvent({
+            eventName: 'Purchase',
+            userData: {
+              email: updatedUser.email ?? undefined,
+              fbc: (session.metadata?.fbc) ?? undefined,
+              fbp: (session.metadata?.fbp) ?? undefined,
+            },
+            customData: {
+              currency: session.currency?.toUpperCase() ?? 'EUR',
+              value: amountCents / 100,
+              content_name: session.metadata?.plan ?? 'subscription',
+            },
+          }).catch(console.error);
         }
         break;
       }