help-slack-bot

#setup

Slack Set up

Create App

Go to https://api.slack.com/apps and click on “create new app”

App Scopes

Click on OAuth & Permissions
Add the following Bot Token Scopes

• channels:history
• channels:read
• chat:write
• commands
• groups:history
• im:history
• im:read
• im:write

AWS Set up

Set up a free account

Lambda

Go to Lambda Services
Click on create function and author from scratch
Runtime should be python (3.8)

Add Trigger

Select API gateway, and make sure it a HTTPS

Back to Slack

Event Subscription

Paste APi endpoint link from AWS in request URL

Subscribe to bot events

These are the event that be sent to the lambda function

• message.channels -- any message in a channel this bot is part of
• message.groups -- any message in a group chat this bot is part of
• message.im -- any message sent to the bot

Basic Information

Install your app in to your workspace

Oauth & Permissions

Copy Bot User Oauth Token for later step

Back to AWS

Code

Copy Lambda_function.py in to code

Configuration

Environment Variables

Create a new vairable called BOT_TOKEN add the cot user oauth token from slack

##Database set up
###Create table
Name: Help-bot
Partition key: username
Sort key: timestamp

Configure access in AWS

Follow this guide to create IAM policy to allow access to the database
https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_examples_lambda-access-dynamodb.html
Follow this to create a role that uses this policy and apply the role to the lambda function
https://aws.amazon.com/blogs/security/how-to-create-an-aws-iam-policy-to-grant-aws-lambda-access-to-an-amazon-dynamodb-table/

#Monitoring the app
At this point you should have a running app
##monitor
Every time Slack generates an Event, it will appear in the Monitor section of Lambda with a link to the logStream in CloudWatch