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"""This module contains Google Drive sensors."""

from __future__ import annotations

from typing import TYPE_CHECKING, Sequence

from import GoogleDriveHook
from airflow.sensors.base import BaseSensorOperator

    from airflow.utils.context import Context

[docs]class GoogleDriveFileExistenceSensor(BaseSensorOperator): """ Checks for the existence of a file in Google Cloud Storage. :param folder_id: The Google drive folder where the file is. :param file_name: The name of the file to check in Google Drive :param drive_id: Optional. The id of the shared Google Drive in which the file resides. :param gcp_conn_id: The connection ID to use when connecting to Google Cloud Storage. :param delegate_to: The account to impersonate using domain-wide delegation of authority, if any. For this to work, the service account making the request must have domain-wide delegation enabled. :param impersonation_chain: Optional service account to impersonate using short-term credentials, or chained list of accounts required to get the access_token of the last account in the list, which will be impersonated in the request. If set as a string, the account must grant the originating account the Service Account Token Creator IAM role. If set as a sequence, the identities from the list must grant Service Account Token Creator IAM role to the directly preceding identity, with first account from the list granting this role to the originating account (templated). """
[docs] template_fields: Sequence[str] = ( "folder_id", "file_name", "drive_id", "impersonation_chain", )
[docs] ui_color = "#f0eee4"
def __init__( self, *, folder_id: str, file_name: str, drive_id: str | None = None, gcp_conn_id: str = "google_cloud_default", delegate_to: str | None = None, impersonation_chain: str | Sequence[str] | None = None, **kwargs, ) -> None: super().__init__(**kwargs) self.folder_id = folder_id self.file_name = file_name self.drive_id = drive_id self.gcp_conn_id = gcp_conn_id self.delegate_to = delegate_to self.impersonation_chain = impersonation_chain
[docs] def poke(self, context: Context) -> bool:"Sensor is checking for the file %s in the folder %s", self.file_name, self.folder_id) hook = GoogleDriveHook( gcp_conn_id=self.gcp_conn_id, delegate_to=self.delegate_to, impersonation_chain=self.impersonation_chain, ) return hook.exists(folder_id=self.folder_id, file_name=self.file_name, drive_id=self.drive_id)

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