X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=turbot_lambda%2Fturbot_lambda.py;h=1aa428fa95c0740d05c8aa3368877479a07f66ea;hb=5e7ee7c20f71996cedd04586d7139250c6704c0d;hp=ba8d06db20c66e4ada2d8a0dabc1279ecea4dd4d;hpb=0a23662568043cde609216287ef7323e281ea764;p=turbot diff --git a/turbot_lambda/turbot_lambda.py b/turbot_lambda/turbot_lambda.py index ba8d06d..1aa428f 100644 --- a/turbot_lambda/turbot_lambda.py +++ b/turbot_lambda/turbot_lambda.py @@ -1,22 +1,77 @@ from urllib.parse import parse_qs -from turbot.rot import rot -from turbot import views from slack import WebClient +import base64 import boto3 import requests -import hashlib -import hmac import json +import pickle +import os +from types import SimpleNamespace +from google.auth.transport.requests import Request +from googleapiclient.discovery import build + +import turbot.interaction +import turbot.events ssm = boto3.client('ssm') -response = ssm.get_parameter(Name='SLACK_SIGNING_SECRET', WithDecryption=True) -slack_signing_secret = bytes(response['Parameter']['Value'], 'utf-8') +# Note: Late import here to have the environment variable above available +from turbot.slack import slack_is_valid_request # noqa -response = ssm.get_parameter(Name='SLACK_BOT_TOKEN', WithDecryption=True) -slack_bot_token = response['Parameter']['Value'] +if 'SLACK_BOT_TOKEN' in os.environ: + slack_bot_token = os.environ['SLACK_BOT_TOKEN'] +else: + response = ssm.get_parameter(Name='SLACK_BOT_TOKEN', WithDecryption=True) + slack_bot_token = response['Parameter']['Value'] + os.environ['SLACK_BOT_TOKEN'] = slack_bot_token slack_client = WebClient(slack_bot_token) +if 'GSHEETS_PICKLE_BASE64' in os.environ: + gsheets_pick_base64 = os.environ['GSHEETS_PICKLE_BASE64'] +else: + response = ssm.get_parameter(Name='GSHEETS_PICKLE_BASE64', + WithDecryption=True) + gsheets_pickle_base64 = response['Parameter']['Value'] + os.environ['GSHEETS_PICKLE_BASE64'] = gsheets_pickle_base64 +gsheets_pickle = base64.b64decode(gsheets_pickle_base64) +gsheets_creds = pickle.loads(gsheets_pickle) + +if gsheets_creds: + if gsheets_creds.valid: + print("Loaded valid GSheets credentials from SSM") + else: + gsheets_creds.refresh(Request()) + gsheets_pickle = pickle.dumps(gsheets_creds) + gsheets_pickle_base64_bytes = base64.b64encode(gsheets_pickle) + gsheets_pickle_base64 = gsheets_pickle_base64_bytes.decode('us-ascii') + print("Storing refreshed GSheets credentials into SSM") + os.environ['GSHEETS_PICKLE_BASE64'] = gsheets_pickle_base64 + ssm.put_parameter(Name='GSHEETS_PICKLE_BASE64', + Type='SecureString', + Value=gsheets_pickle_base64, + Overwrite=True) +service = build('sheets', + 'v4', + credentials=gsheets_creds, + cache_discovery=False) +sheets = service.spreadsheets() +service = build('drive', + 'v3', + credentials=gsheets_creds, + cache_discovery=False) +files = service.files() +permissions = service.permissions() + +db = boto3.resource('dynamodb') + +turb = SimpleNamespace() +turb.slack_client = slack_client +turb.db = db +turb.table = db.Table("turbot") +turb.sheets = sheets +turb.files = files +turb.permissions = permissions + def error(message): """Generate an error response for a Slack request @@ -31,24 +86,6 @@ def error(message): 'body': '' } -def slack_is_valid_request(slack_signature, timestamp, body): - """Returns True if the timestamp and body correspond to signature. - - This implements the Slack signature verification using the slack - signing secret (obtained via an SSM parameter in code above).""" - - content = "v0:{}:{}".format(timestamp,body).encode('utf-8') - - signature = 'v0=' + hmac.new(slack_signing_secret, - content, - hashlib.sha256).hexdigest() - - if hmac.compare_digest(signature, slack_signature): - return True - else: - print("Bad signature: {} != {}".format(signature, slack_signature)) - return False - def turbot_lambda(event, context): """Top-level entry point for our lambda function. @@ -77,12 +114,12 @@ def turbot_lambda(event, context): content_type = headers['content-type'] if (content_type == "application/json"): - return turbot_event_handler(event, context) + return turbot_event_handler(turb, event, context) if (content_type == "application/x-www-form-urlencoded"): - return turbot_interactive_or_slash_command(event, context) + return turbot_interactive_or_slash_command(turb, event, context) return error("Unknown content-type: {}".format(content_type)) -def turbot_event_handler(event, context): +def turbot_event_handler(turb, event, context): """Handler for all subscribed Slack events""" body = json.loads(event['body']) @@ -90,12 +127,12 @@ def turbot_event_handler(event, context): type = body['type'] if type == 'url_verification': - return url_verification_handler(body) + return url_verification_handler(turb, body) if type == 'event_callback': - return event_callback_handler(body) + return event_callback_handler(turb, body) return error("Unknown event type: {}".format(type)) -def url_verification_handler(body): +def url_verification_handler(turb, body): # First, we have to properly respond to url_verification # challenges or else Slack won't let us configure our URL as an @@ -107,24 +144,19 @@ def url_verification_handler(body): 'body': challenge } -def event_callback_handler(body): - type = body['event']['type'] +def event_callback_handler(turb, body): + event = body['event'] + type = event['type'] - if type == 'app_home_opened': - return app_home_opened_handler(body) + if type in turbot.events.events: + return turbot.events.events[type](turb, event) return error("Unknown event type: {}".format(type)) -def app_home_opened_handler(body): - user_id = body['event']['user'] - view = views.home(user_id, body) - slack_client.views_publish(user_id=user_id, view=view) - return "OK" - -def turbot_interactive_or_slash_command(event, context): +def turbot_interactive_or_slash_command(turb, event, context): """Handler for Slack interactive things (buttons, shortcuts, etc.) as well as slash commands. - This function simply makes a quiuck determination of what we're looking + This function simply makes a quick determination of what we're looking at and then defers to either turbot_interactive or turbot_slash_command.""" # Both interactives and slash commands have a urlencoded body @@ -133,66 +165,77 @@ def turbot_interactive_or_slash_command(event, context): # The difference is that an interactive thingy has a 'payload' # while a slash command has a 'command' if 'payload' in body: - return turbot_interactive(json.loads(body['payload'][0])) + return turbot_interactive(turb, json.loads(body['payload'][0])) if 'command' in body: - return turbot_slash_command(body) + return turbot_slash_command(turb, body) return error("Unrecognized event (neither interactive nor slash command)") -def turbot_interactive(payload): +def turbot_interactive(turb, payload): """Handler for Slack interactive requests These are the things that come from a user interacting with a button a shortcut or some other interactive element that our app has made available to the user.""" - print("In turbot_interactive, payload is: {}".format(str(payload))) + type = payload['type'] -def turbot_slash_command(body): - """Implementation for Slack slash commands. + if type == 'block_actions': + return turbot_block_action(turb, payload) + if type == 'view_submission': + return turbot.interaction.view_submission(turb, payload) + if type == 'shortcut': + return turbot_shortcut(turb, payload) + return error("Unrecognized interactive type: {}".format(type)) - This parses the request and arguments and farms out to - supporting functions to implement all supported slash commands. - """ +def turbot_block_action(turb, payload): + """Handler for Slack interactive block actions - command = body['command'][0] - args = body['text'][0] + Specifically, those that have a payload type of 'block_actions'""" - if (command == "/rotlambda" or command == "/rot"): - return rot_slash_command(body, args) + actions = payload['actions'] - return error("Command {} not implemented".format(command)) + if len(actions) != 1: + return error("No support for multiple actions ({}) in a single request" + .format(len(actions))) + + action = actions[0] -def rot_slash_command(body, args): - """Implementation of the /rot command + atype = action['type'] + if 'value' in action: + avalue = action['value'] + else: + avalue = '*' - The args string should be as follows: + if ( + atype in turbot.interaction.actions + and avalue in turbot.interaction.actions[atype] + ): + return turbot.interaction.actions[atype][avalue](turb, payload) + return error("Unknown action of type/value: {}/{}".format(atype, avalue)) - [count|*] String to be rotated +def turbot_shortcut(turb, payload): + """Handler for Slack shortcuts - That is, the first word of the string is an optional number (or - the character '*'). If this is a number it indicates an amount to - rotate each character in the string. If the count is '*' or is not - present, then the string will be rotated through all possible 25 - values. + These are invoked as either global or message shortcuts by a user.""" - The result of the rotation is returned (with Slack formatting) in - the body of the response so that Slack will provide it as a reply - to the user who submitted the slash command.""" + print("In turbot_shortcut, payload is: {}".format(str(payload))) - channel_name = body['channel_name'][0] - response_url = body['response_url'][0] - channel_id = body['channel_id'][0] + return error("Shortcut interactions not yet implemented") - result = rot(args) +def turbot_slash_command(turb, body): + """Implementation for Slack slash commands. + + This parses the request and arguments and farms out to + supporting functions to implement all supported slash commands. + """ - if (channel_name == "directmessage"): - requests.post(response_url, - json = {"text": result}, - headers = {"Content-type": "application/json"}) + command = body['command'][0] + if 'text' in body: + args = body['text'][0] else: - slack_client.chat_postMessage(channel=channel_id, text=result) + args = '' - return { - 'statusCode': 200, - 'body': "" - } + if command in turbot.interaction.commands: + return turbot.interaction.commands[command](turb, body, args) + + return error("Command {} not implemented".format(command))