export class ResponseInterceptor implements NestInterceptor {
  constructor(
    private readonly logger = new Logger(),
  ) {
  }

  intercept(context: ExecutionContext, next: CallHandler): Observable<unknown> {
    return next.handle().pipe(
      map((res: unknown) => this.responseHandler(res, context)),
      catchError((err: HttpException) => throwError(() => this.errorHandler(err, context))),
    );
  }

  errorHandler(exception: HttpException, context: ExecutionContext) {
    if ((context.getType() as string) === 'telegraf') {
      // handle telegraf exception
    };
  }

  async responseHandler(res: any, context: ExecutionContext) {
    if ((context.getType() as string) === 'telegraf') return res;
    // process as normal
  }
}