Create lib/firebase-admin.ts

lib/firebase-admin.ts

@@ -0,0 +1,43 @@
+import 'server-only';
+import admin from 'firebase-admin';
+
+interface FirebaseAdminConfig {
+  projectId: string;
+  clientEmail: string;
+  privateKey: string;
+}
+
+function formatPrivateKey(key: string) {
+  return key.replace(/\\n/g, '\n');
+}
+
+export function createFirebaseAdminApp(config: FirebaseAdminConfig) {
+  if (admin.apps.length > 0) {
+    return admin.app();
+  }
+
+  return admin.initializeApp({
+    credential: admin.credential.cert({
+      projectId: config.projectId,
+      clientEmail: config.clientEmail,
+      privateKey: formatPrivateKey(config.privateKey),
+    }),
+  });
+}
+
+export function getAdminAuth() {
+    // Only initialize if we have credentials, otherwise return null (or throw)
+    // This prevents build crashes if env vars are missing
+    if (!process.env.FIREBASE_PROJECT_ID || !process.env.FIREBASE_CLIENT_EMAIL || !process.env.FIREBASE_PRIVATE_KEY) {
+        console.warn("Firebase Admin credentials missing. Server-side auth will fail.");
+        return null;
+    }
+
+    const app = createFirebaseAdminApp({
+        projectId: process.env.FIREBASE_PROJECT_ID,
+        clientEmail: process.env.FIREBASE_CLIENT_EMAIL,
+        privateKey: process.env.FIREBASE_PRIVATE_KEY,
+    });
+    
+    return app.auth();
+}