Created
June 7, 2019 07:43
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Hook and notify channel creation and emoji registration of Slack
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| import os | |
| import json | |
| import logging | |
| import urllib.request | |
| # Bot's "Verification Token" at "Basic Information" | |
| SLACK_VERIFY_TOKEN = os.environ['SLACK_VERIFY_TOKEN'] | |
| # Bot's "Bot User OAuth Access Token" at "Install App" | |
| SLACK_BOT_USER_ACCESS_TOKEN = os.environ['SLACK_BOT_USER_ACCESS_TOKEN'] | |
| # User name of response bot | |
| SLACK_BOT_USER_NAME = os.environ['SLACK_BOT_USER_NAME'] | |
| # Icon emoji of response bot | |
| SLACK_ICON_EMOJI = os.environ['SLACK_ICON_EMOJI'] | |
| # channel name for notifying something (e.g. created channel) | |
| SLACK_NOTIFY_CHANNEL = os.environ['SLACK_NOTIFY_CHANNEL'] | |
| logger = logging.getLogger() | |
| logger.setLevel(logging.INFO) | |
| def lambda_handler(event, context): | |
| """ | |
| Entry point | |
| """ | |
| logger.info("Event: " + str(event)) | |
| body = json.loads(event["body"]) | |
| # for verification | |
| if "challenge" in body: | |
| return make_response(200, {}, {"challenge": body["challenge"]}) | |
| # check request token | |
| if body.get("token") != SLACK_VERIFY_TOKEN: | |
| return make_response(403, {}, "Forbidden Request") | |
| # check parameters | |
| if not "event" in body: | |
| return make_response(400, {}, "Invalid Parameter(lack of 'event')") | |
| # execute reaction | |
| return execute_event_reaction(body["event"]) | |
| def execute_event_reaction(event): | |
| """ | |
| [parameters] | |
| event: event paramerter | |
| """ | |
| event_type = event["type"] | |
| if event_type == "channel_created": | |
| return send_msg_to_slack(SLACK_NOTIFY_CHANNEL, "#%s が生えたぜ ヒャッハー" % event["channel"]["name"]) | |
| elif event_type == "emoji_changed" and event["subtype"] == "add": | |
| emoji_name = event["name"] | |
| return send_msg_to_slack(SLACK_NOTIFY_CHANNEL, ":%s: %s が咲いたぜ ヒャッハー" % (emoji_name, emoji_name)) | |
| return make_response(400, {}, "Unknown request type [%s]" % body_event["type"]) | |
| def make_response(statusCode, headers, body): | |
| """ | |
| [parameters] | |
| statusCode: HTTP status code | |
| headers: response headers(if you don't need, pass empty dictionary) | |
| body: response as dictionary | |
| """ | |
| res = { | |
| "statusCode": statusCode, | |
| "headers": headers, | |
| "body": json.dumps(body) | |
| } | |
| logger.info("Response: " + str(res)) | |
| return res | |
| def send_msg_to_slack(channel: str, msg: str): | |
| """ | |
| [parameters] | |
| channel: channel ID or name to send message | |
| msg: message to post | |
| """ | |
| url = "https://slack.com/api/chat.postMessage" | |
| headers = { | |
| "Content-Type": "application/json; charset=UTF-8", | |
| "Authorization": "Bearer {0}".format(SLACK_BOT_USER_ACCESS_TOKEN) | |
| } | |
| data = { | |
| "token": SLACK_BOT_USER_ACCESS_TOKEN, | |
| "channel": channel, | |
| "username": SLACK_BOT_USER_NAME, | |
| "icon_emoji": SLACK_ICON_EMOJI, | |
| "link_names": True, | |
| "text": msg, | |
| } | |
| req = urllib.request.Request(url, data=json.dumps(data).encode("utf-8"), method="POST", headers=headers) | |
| with urllib.request.urlopen(req) as res: | |
| body = json.load(res) | |
| return make_response(200, {}, body) | |
| return make_response(400, {}, body) |
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