Google Classroom notifier Discord bot

A tiny Discord bot that will send you a notification to a designated Discord channel every time there's a new announcement in one of the Google Classroom courses you're in.

Requirements

• Node.js v12 or later
• A G Suite for Education account with Google Classroom enabled
• A Discord bot token
• A channel ID for the notifications to be sent to
• A domain name or ngrok for the initial setup (for the callback URI)
• OAuth2 credentials for Google's API with the following scopes:

https://www.googleapis.com/auth/classroom.courses.readonly
https://www.googleapis.com/auth/classroom.announcements.readonly

If you want to get notified about classwork too, you also need to grant this scope:

https://www.googleapis.com/auth/classroom.coursework.me.readonly

If you want the attached Google Drive files to be uploaded to the channel (as long as they're less than 8 MB in size), you also need this scope:

https://www.googleapis.com/auth/drive.readonly

Getting Started

1. Clone the repo

git clone git@github.com:jozsefsallai/discord-google-classroom.git
cd discord-google-classroom

2. Install the dependencies

npm install

3. Create and modify the config file

cp config.example.json config.json
vim config.json

4. Build the app and start it to authorize your app

npm run build
npm run start

On the first run, you will be prompted to open a URL to authorize your application. Open that URL in your browser, log in with the account that has an active G Suite for Education account with access to Google Classroom, and authorize the application.

Once you're redirected to the Express server, copy the code that shows up in the JSON response and paste it into the terminal. The rest of the configuration should be automatic.

Once the configuration is successful, the Express server will shut down and the bot will continue to run. On the next startup, you will not have to perform this step and the Express server will not start either.

5. Invite your bot to your server

Open the following link in your browser:

https://discord.com/oauth2/authorize?client_id=CLIENT_ID&scope=bot

where you replace "CLIENT_ID" with the app ID of your bot (not the user ID). The bot doesn't require any permission other than read and write to the channel it's supposed to send the notifications to.

Configuration

server.port

The port number on which the Express server will start in case the app was not authorized yet.

bot.token

The token of your Discord bot.

bot.channel

The ID of the channel that the notifications will be sent to.

bot.checkInterval

Specifies how often (minutes) the bot will check your classroom for news. The bot will not send a message to your Discord channel if there aren't any new posts.

bot.pingEveryone

If set to true, the bot will ping @everyone when sending a notification.

bot.timezone

An IANA-compliant timezone string. Defaults to UTC. Example: Europe/Berlin.

google.*

Properties that are required for authenticating with your Google app.

clientId, authURI, tokenURI, clientSecret

These are details that you will receive in the form of a JSON file when creating the app in the Google Developer Console.

redirectURI

The URI to which Google's authorization service will redirect the client (you) after you've authorized the app. This must end in /authorize. You can use a custom domain for this or ngrok.

scopes

Usually you don't want to change these values. Those two are necessary for the bot to function correctly.

classroom.courses.readonly is required for mapping the course enrollment codes to course objects. classroom.announcements.readonly is obviously required for listing and checking new posts.

classroom.coursework.me.readonly is an optional scope that is required only if you want to be notified about classwork too, not just announcements.

drive.readonly is an optional scope that is used for fetching the attached Google Drive files and sending them to your Discord channel. If you don't need this feature, just don't provide this scope.

enrollmentCodes

An array of codes that you used when you joined the Google Classroom course. This is optional if linkIDs is specified.

linkIDs

An array of link IDs (last component of the classroom's URL). For example, the link ID of https://classroom.google.com/u/0/c/MTA7AfC10BO0AVEt is MTA7AfC10BO0AVEt. This is useful if you have access to the classroom but you don't know what the enrollment code is. The parameter is optional if you've specified enrollmentCodes instead.

Contribution

Contribution is encouraged! This was an afternoon project, so I don't expect it to be completely bug-proof and there are definitely things that I could have done better. Before creating a PR, make sure that your changes pass the linter by running the following command:

npm run lint

License

MIT.