Pusher 💪

Push-Notifications for everything. Ever wished a Webpage had Push-Notifications? With Pusher you can create Flows that will navigate a Browser through a Website. With a decision tree you can than create messages based on the page content and send them through a push notification channel of your choice.

The Application is available in the Cloud on phr.vercel.app or you can clone this Repository and host it in you own AWS.

Development

1. Make sure direnv is installed
2. Create a .envrc file based on the .envrc.example file

pnpm install
pnpm run setup
pnpm run dev

This will start:

• Next Webapp on http://localhost:3000
• Lambda Invocation Server on http://localhost:3002
• Lambda HTTP Proxy Endpoint on http://localhost:3004
• S3 Server on http://localhost:3001
• DynamoDB Server on http://localhost:3003

Deployment

Build the App first with pnpm run build and

Deploy the AWS Stack:

pnpm run --filter @pusher/aws deploy

Infrastructure

The main parts of the Pusher App are the Runner and the Scheduler AWS Lambda Functions. If you want to host your own Pusher Instance you just need these two Functions. The Scheduler runs on a cron schedule that is defined during the deployment. It reads all Flows out of a DynamoDB Database and Filters the Flows that are not runnable. The Scheduler then invokes the Runner Function providing the Flow as the Payload. The Runner Function executes the Flow by spinning up a Headless Browser and traveling the actionTree.

For the User convinience this Repository also contains an API Lambda Function that exposes Endpoints to interact with the DynamoDB Database and a Webapp that provides a UI to build a Flow JSON Structure and request the API.

Finally this Repository contains a Cleaner Lambda Function that runs once a day to delete old Assets out of the S3 Bucket.