Copied over code from flow

lolafect/slack.py

@@ -1,2 +1,30 @@
-def say_hi():
-    return "Slack says hi"
+import json
+
+from prefect.core import Task
+from prefect.triggers import any_failed
+import requests
+class SendSlackMessageTask(Task):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+    def run(self, webhook_url:, text_to_send) -> None:
+        send_message_to_slack_channel(webhook_url, text_to_send)
+
+
+def send_message_to_slack_channel(webhook_url, text_to_send):
+
+    slack_data = {"text": text_to_send}
+    response = requests.post(
+        webhook_url,
+        data=json.dumps(slack_data),
+        headers={"Content-Type": "application/json"},
+    )
+    if response.status_code != 200:
+        raise ValueError(
+            "Request to slack returned an error %s, the response is:\n%s"
+            % (response.status_code, response.text)
+        )
+
+
+send_message_to_slack_channel_on_upstream_all_successful = SendSlackMessageTask()
+send_error_warning_to_slack = SendSlackMessageTask(trigger=any_failed)