Source code for airflow.providers.slack.notifications.slack

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from __future__ import annotations

import json
from functools import cached_property
from typing import Sequence

from airflow.exceptions import AirflowOptionalProviderFeatureException

try:
    from airflow.notifications.basenotifier import BaseNotifier
except ImportError:
    raise AirflowOptionalProviderFeatureException(
        "Failed to import BaseNotifier. This feature is only available in Airflow versions >= 2.6.0"
    )

from airflow.providers.slack.hooks.slack import SlackHook

[docs]ICON_URL: str = "https://raw.githubusercontent.com/apache/airflow/2.5.0/airflow/www/static/pin_100.png"


[docs]class SlackNotifier(BaseNotifier):
    """
    Slack BaseNotifier.

    :param slack_conn_id: Slack API token (https://api.slack.com/web).
    :param text: The content of the message
    :param channel: The channel to send the message to. Optional
    :param username: The username to send the message as. Optional
    :param icon_url: The icon to use for the message. Optional
    :param attachments: A list of attachments to send with the message. Optional
    :param blocks: A list of blocks to send with the message. Optional
    """

[docs]    template_fields = ("text", "channel", "username", "attachments", "blocks")

    def __init__(
        self,
        *,
        slack_conn_id: str = "slack_api_default",
        text: str = "This is a default message",
        channel: str = "#general",
        username: str = "Airflow",
        icon_url: str = ICON_URL,
        attachments: Sequence = (),
        blocks: Sequence = (),
    ):
        super().__init__()
        self.slack_conn_id = slack_conn_id
        self.text = text
        self.channel = channel
        self.username = username
        self.icon_url = icon_url
        self.attachments = attachments
        self.blocks = blocks

    @cached_property
[docs]    def hook(self) -> SlackHook:
        """Slack Hook."""
        return SlackHook(slack_conn_id=self.slack_conn_id)

[docs]    def notify(self, context):
        """Send a message to a Slack Channel."""
        api_call_params = {
            "channel": self.channel,
            "username": self.username,
            "text": self.text,
            "icon_url": self.icon_url,
            "attachments": json.dumps(self.attachments),
            "blocks": json.dumps(self.blocks),
        }
        self.hook.call("chat.postMessage", json=api_call_params)


[docs]send_slack_notification = SlackNotifier