Whatsapp Web Clone Backend

You can find the user interface here : https://github.com/Theo-Fourniez/websocket-chat-app-frontend .
This project was made to learn Angular 16 and Spring boot 3. The goal was to create a app similar to WhatsApp Web.

Functionality

Real time messaging (using websockets)
Delayed messaging, for example when a user sends a message to another offline user (using HTTP requests)
Receiving web push in browser notifications when receiving messages while the app is not opened (using push API and service workers)
Adding friends

Dev environment

IntelliJ IDEA
Java 17
H2 in memory database

Used references :

https://simple-push-demo.vercel.app/ : to tinker with push notifications
https://developer.mozilla.org/en-US/docs/Web/API/Push_API
https://developer.mozilla.org/en-US/docs/Web/API/Notification
https://angular.io/guide/service-worker-notifications