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Deploy this app using Heroku

Heroku is a cloud PaaS that supports several programming languages, including NodeJS. It's extra nifty as you can use it to deploy add-ons such as databases, performance management apps, and log analysis tools.

This repository has an app.json (learn more about this Heroku standard here so the steps below will help get a version of this code running in Heroku in a few steps. Let's go!

Part 0: Start to create a Heroku application from this template

  1. Head on over to https://heroku.com/deploy?template=https://github.com/proximityinc/slack-triage-bot or use the button below:

    Deploy

  2. Enter an app name and make sure you see the green text "awesome-app-name-you-entered is available". In this example, your application will ultimately be deployed to awesome-app-name-you-entered.herokuapp.com and we'll need that domain in a second.

  3. Before you can create the purple 'Deploy app', we need to create our Slack App and provide the last three Config Vars: SLACK_CLIENT_ID, SLACK_CLIENT_SECRET, and SLACK_SIGNING_SECRET

Part 1: Setup your Slack app

In a new tab, do the following. Be sure to replace awesome-app-name-you-entered with your actual app name you chose in Part 0 step 2.

  1. Create a new Slack app at api.slack.com/apps

  2. Go to Interactivity & Shortcuts

    • Enable Interactivity
    • Enter your Interactivity Request URL: https://awesome-app-name-you-entered.herokuapp.com/slack/events
    • Create a new Shortcut
      • Select Global shortcut
      • Choose a descriptive name and description for your shortcut, for example:
        • Name: Show triage stats
        • Description: Calculate stats for a triage channel
      • For the Callback ID, it is important you set it to triage_stats
    • Enter your Select Menus Options Load URL https://awesome-app-name-you-entered.herokuapp.com/slack/events
    • Click Save Changes

  3. Go to OAuth & Permissions to add a bot scope

    • Under Redirect URLs
      • Add a new Redirect URL: https://awesome-app-name-you-entered.herokuapp.com/slack/oauth_redirect
      • Click Save URLs
    • Under Scopes and Bot Token Scopes,
      • Add channels:read, channels:history, and channels:join so our bot will be able to read the history of public channels and join channels it's asked to analyze
      • Add chat:write and files:write so our bot can message users and upload files (CSV reports) as itself

  4. Go to App Home

    • Under Your App’s Presence in Slack
      • Optionally, update your app's Display/Bot and Default name
      • Optionally, choose to Always Show My Bot as Online
    • Under Show Tabs, toggle Home Tab on

  5. If you plan to install your application to more than one workspace, go to Manage Distribution and activate public distribution

  6. Go back to your new app's Basic Information page. We'll need to grab values from it in the next part.

Part 2: Finish creating your Heroku app and deploy it 🚀

  1. Go back to your Heroky 'Create New App' browser tab and fill in last three Config Vars (SLACK_CLIENT_ID, SLACK_CLIENT_SECRET, and SLACK_SIGNING_SECRET) with the values you find on your Slack app's Basic Information page.

  2. Click the purple Deploy app button and wait a few moments

  3. Once you see 'Your app was successfully deployed.' resist the urge to click 'View' just yet. Instead, click 'Manage app' where we will configure the database after the next step.

  4. Now that your application is running at https://awesome-app-name-you-entered.herokuapp.com, add your Slack Events API subscriptions by going back to your app config and visiting the Event Subscriptions page.

    • Toggle "Enable Events" to "On"
    • Enter https://awesome-app-name-you-entered.herokuapp.com/slack/events as your Request URL
      • In a few seconds, you should see 'Verified ✔️' in green text.
    • Under "Subscribe to bot events", add the app_home_opened event
    • Click Save Changes

Part 3: Set your MongoDB backend connection information

It's now time to configure your backend, powered by a MongoDB database. The application is set up to look for a MongoDB connection string stored in a MONGODB_URI Heroku environment variable.

Heroku add-ons make it easy

For the fastest setup, you can look for a Heroku Add-On for MongoDB by browsing the Add-ons marketplace here.

Once you add the add-on to your new app, Heroku will automatically set the MONGODB_URI environment variable.

As of January 2022, there were no free MongoDB add-ons available on the Heroku add-ons marketplace.

MongoDB Atlas has a free offering

If you're looking for an alternative option, you might consider MongoDB Atlas, MongoDB's cloud-hosted offering which has a free tier.

To setup MongoDB Atlas to work with this repository, follow the sign up flow for MongoDB Atlas and provision a cluster. Be sure to setup a user with read/write access to the your new database and allow connections to be initiated from any IP on the internet to connect to your database (0.0.0.0/0).

Once your cluster is provisioned, retrieve your connection string by clicking "Connect", "Connect your application", and "Node.js" / "4.0 or later". You will be shown a connection string in the form of mongodb+srv://<username>:<password>@<server>/<databaseName>?retryWrites=true&w=majority or similar. Copy this string and insert your user's password and optionally update the database name.

Finally, set the MONGODB_URI Heroku environment variable to this value. Your application will automatically restart.

Part 4: Install and use your app

  1. It's time to install the app. Go directly to https://awesome-app-name-you-entered.herokuapp.com/slack/install and click the 'Add to Slack' button.

  2. Try out your freshly deployed app!

    1. Visit your app's App Home tab to see the current configuration (you can clone your Heroku git repo, edit config.js, and push your changes to Heroku to update your settings.)
    2. Execute your shortcut by entering "Show triage stats" in the quick switcher (CMD+k) or by using the lightning bolt ⚡️ symbol right below the message input field in Slack and filling out the form. You should receive a DM from the bot.
    3. Wait for the (by default) top-of-the-hour hourly update in any channel the bot has been invited to.

  3. Take a moment to check out your Heroku addon.

    • You should see that MongoLabs has some data in it
    • Consider adding other addons to help you manage your app such as Logentries for ingesting your logs and NewRelic for monitoring performance characteristics.

  4. Lastly, note that in the default configuration of this app, you should have one and only one web dyno running at a time as the scheduled reminder functionality runs within the web application code courtesy of node-cron.

    • In production, you may want to disable this and outsource the scheduling to Heroku Scheduler or another service/add-on.