Implement file watching functionality in filesystem and directory picker

[stijnpotters1]

Before adding a file in the original file explorer

After adding file in the file explorer its immediately added, even though the directory picker stayed open

Also in the editor and studio file tree

[Matthbo]

Lots of undefined's where null's should be used
Making a poller for file changes from the frontend to the backend doesn't seem optimal, websockets or an equivalent should be used to push file changes to the client instead

[stijnpotters1]

Lots of undefined's where null's should be used Making a poller for file changes from the frontend to the backend doesn't seem optimal, websockets or an equivalent should be used to push file changes to the client instead

@Matthbo The current implementation uses SSE (EventSource + Spring's SseEmitter), which is a server push mechanism. The server pushes file change events to the client. It's not polling.

[Matthbo]

Lots of undefined's where null's should be used Making a poller for file changes from the frontend to the backend doesn't seem optimal, websockets or an equivalent should be used to push file changes to the client instead

@Matthbo The current implementation uses SSE (EventSource + Spring's SseEmitter), which is a server push mechanism. The server pushes file change events to the client. It's not polling.

Gotcha, seems like I misinterpreted
I've never used EventSource before so this is really awesome to see :D

[Matthbo]

Also notice the sonar warnings

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
84.8% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud