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  # to you under the Apache License, Version 2.0 (the
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  """
  Example Airflow DAG for Google Cloud Storage to SFTP transfer operators.
  """
  
  import os
  
  from airflow import models
  from airflow.providers.google.cloud.transfers.gcs_to_sftp import GCSToSFTPOperator
  from airflow.providers.sftp.sensors.sftp import SFTPSensor
  from airflow.utils.dates import days_ago
  
  SFTP_CONN_ID = "ssh_default"
  BUCKET_SRC = os.environ.get("GCP_GCS_BUCKET_1_SRC", "test-gcs-sftp")
  OBJECT_SRC_1 = "parent-1.bin"
  OBJECT_SRC_2 = "dir-1/parent-2.bin"
  OBJECT_SRC_3 = "dir-2/*"
  DESTINATION_PATH_1 = "/tmp/single-file/"
  DESTINATION_PATH_2 = "/tmp/dest-dir-1/"
  DESTINATION_PATH_3 = "/tmp/dest-dir-2/"
  
  
  with models.DAG(
      "example_gcs_to_sftp", start_date=days_ago(1), schedule_interval=None, tags=['example']
  ) as dag:
      # [START howto_operator_gcs_to_sftp_copy_single_file]
      copy_file_from_gcs_to_sftp = GCSToSFTPOperator(
          task_id="file-copy-gsc-to-sftp",
          sftp_conn_id=SFTP_CONN_ID,
          source_bucket=BUCKET_SRC,
          source_object=OBJECT_SRC_1,
          destination_path=DESTINATION_PATH_1,
      )
      # [END howto_operator_gcs_to_sftp_copy_single_file]
  
      check_copy_file_from_gcs_to_sftp = SFTPSensor(
          task_id="check-file-copy-gsc-to-sftp",
          sftp_conn_id=SFTP_CONN_ID,
          timeout=60,
          path=os.path.join(DESTINATION_PATH_1, OBJECT_SRC_1),
      )
  
      # [START howto_operator_gcs_to_sftp_move_single_file_destination]
      move_file_from_gcs_to_sftp = GCSToSFTPOperator(
          task_id="file-move-gsc-to-sftp",
          sftp_conn_id=SFTP_CONN_ID,
          source_bucket=BUCKET_SRC,
          source_object=OBJECT_SRC_2,
          destination_path=DESTINATION_PATH_1,
          move_object=True,
      )
      # [END howto_operator_gcs_to_sftp_move_single_file_destination]
  
      check_move_file_from_gcs_to_sftp = SFTPSensor(
          task_id="check-file-move-gsc-to-sftp",
          sftp_conn_id=SFTP_CONN_ID,
          timeout=60,
          path=os.path.join(DESTINATION_PATH_1, OBJECT_SRC_2),
      )
  
      # [START howto_operator_gcs_to_sftp_copy_directory]
      copy_dir_from_gcs_to_sftp = GCSToSFTPOperator(
          task_id="dir-copy-gsc-to-sftp",
          sftp_conn_id=SFTP_CONN_ID,
          source_bucket=BUCKET_SRC,
          source_object=OBJECT_SRC_3,
          destination_path=DESTINATION_PATH_2,
      )
      # [END howto_operator_gcs_to_sftp_copy_directory]
  
      check_copy_dir_from_gcs_to_sftp = SFTPSensor(
          task_id="check-dir-copy-gsc-to-sftp",
          sftp_conn_id=SFTP_CONN_ID,
          timeout=60,
          path=os.path.join(DESTINATION_PATH_2, "dir-2", OBJECT_SRC_1),
      )
  
      # [START howto_operator_gcs_to_sftp_move_specific_files]
      move_dir_from_gcs_to_sftp = GCSToSFTPOperator(
          task_id="dir-move-gsc-to-sftp",
          sftp_conn_id=SFTP_CONN_ID,
          source_bucket=BUCKET_SRC,
          source_object=OBJECT_SRC_3,
          destination_path=DESTINATION_PATH_3,
          keep_directory_structure=False,
      )
      # [END howto_operator_gcs_to_sftp_move_specific_files]
  
      check_move_dir_from_gcs_to_sftp = SFTPSensor(
          task_id="check-dir-move-gsc-to-sftp",
          sftp_conn_id=SFTP_CONN_ID,
          timeout=60,
          path=os.path.join(DESTINATION_PATH_3, OBJECT_SRC_1),
      )
  
      move_file_from_gcs_to_sftp >> check_move_file_from_gcs_to_sftp
      copy_dir_from_gcs_to_sftp >> check_copy_file_from_gcs_to_sftp
  
      copy_dir_from_gcs_to_sftp >> move_dir_from_gcs_to_sftp
      copy_dir_from_gcs_to_sftp >> check_copy_dir_from_gcs_to_sftp
      move_dir_from_gcs_to_sftp >> check_move_dir_from_gcs_to_sftp
  