/// Where one service has got to in the batch.
enum BatchState { queued, building, deploying, done, failed, skipped }

abstract class ConnectBatchDeploy {
  /// The run started; every selected service is queued.
  void onBatchStarted(List<String> serviceIds);

  /// One service moved to a new state, optionally with a detail line.
  void onServiceState(String serviceId, BatchState state, {String? detail});

  /// Every service in the batch has been attempted.
  void onBatchFinished();
}