Umstellung auf firebase

bizmatch-server/src/jwt-auth/auth.guard.ts

@@ -0,0 +1,27 @@
+import { CanActivate, ExecutionContext, Injectable, UnauthorizedException } from '@nestjs/common';
+import admin from './firebase-admin';
+
+@Injectable()
+export class AuthGuard implements CanActivate {
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const request = context.switchToHttp().getRequest<Request>();
+    const token = this.extractTokenFromHeader(request);
+
+    if (!token) {
+      throw new UnauthorizedException('No token provided');
+    }
+
+    try {
+      const decodedToken = await admin.auth().verifyIdToken(token);
+      request['user'] = decodedToken; // Fügen Sie die Benutzerdaten dem Request-Objekt hinzu
+      return true;
+    } catch (error) {
+      throw new UnauthorizedException('Invalid token');
+    }
+  }
+
+  private extractTokenFromHeader(request: Request): string | undefined {
+    const [type, token] = request.headers['authorization']?.split(' ') ?? [];
+    return type === 'Bearer' ? token : undefined;
+  }
+}