stop_tracking.py

#!/usr/bin/env python3

# Copyright 2022 Google LLC

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import slack
import logging
import firebase_admin
from firebase_admin import credentials
from firebase_admin import firestore

logger = logging.getLogger(__name__)


def stop_tracking(channel_id, channel_name, case, user_id):
    """
    Remove a case from the list of tracked Google Cloud support cases.

    Parameters
    ----------
    channel_id : str
        unique string used to idenify a Slack channel. Used to send messages to the channel
    channel_name : str
        user designated channel name. For users to understand where their cases are being
        tracked in Slack
    case : str
        unique id of the case
    user_id : str
        the Slack user_id of the user who submitted the request. Used to send ephemeral
        messages to the user
    """
    # Initialize the Firebase app if it hasn't already been done
    if not firebase_admin._apps:
        PROJECT_ID = os.environ.get('PROJECT_ID')
        cred = credentials.ApplicationDefault()
        firebase_admin.initialize_app(cred, {
            'projectId': PROJECT_ID,
        })

    client = slack.WebClient(token=os.environ.get('SLACK_TOKEN'))
    collection = 'tracked_cases'
    db_collection = firestore.Client().collection(collection)
    tracked_cases = (db_collection
                     .where('case', '==', case)
                     .where('channel_id', '==', channel_id)
                     .get())

    exists = False
    for tracked_case in tracked_cases:
        tc = tracked_case.to_dict()
        if tc['channel_id'] == channel_id and tc['case'] == case:
            db_collection.document(tc['guid']).delete()
            exists = True
            break
    if exists:
        client.chat_postMessage(
            channel=channel_id,
            text=f"Case {case} is no longer being tracked in {channel_name}")
    else:
        client.chat_postEphemeral(
            channel=channel_id,
            user=user_id, text=f"Case {case} not found in tracker for {channel_name}")


if __name__ == "__main__":
    channel_id = os.environ.get('TEST_CHANNEL_ID')
    channel_name = os.environ.get('TEST_CHANNEL_NAME')
    case = os.environ.get('TEST_CASE')
    user_id = os.environ.get('TEST_USER_ID')
    stop_tracking(channel_id, channel_name, case, user_id)
    stop_tracking(channel_id, channel_name, case, user_id)