@grnd-alt Really valid points on server/files operations there, I thought about that too, the current implementation had some tweaks for that:

• We had a file locking mechanism with a default timeout of 5 seconds (this.lockTimeout = options.lockTimeout || 5000) to prevent too frequent writes
• The backup operations are called asynchronously and not really block the main thread:

if (updatedData) {
    await this.updateRoomWithData(room, updatedData, users, lastEditedUser)
    this.createRoomBackup(room.id, room)
}

=> Would be better if can move it to a separate process (a queue processor) to process saving since it's not really critical

• I currently think of incorporating with some client side storage (IndexedDB/LocalStorage) to reduce some server loads/operations and prevent data loss too, since one user might only access few rooms at a time compared to server with lots amount of data there. Let me know your thoughts on this one @grnd-alt , thank you!

@hweihwang Yes storing data in localstorage is a good idea, I think we should investigate it later on, as it might get complex to have divergent versions from multiple users, that need to be reconciled when restoring from the browser storage.

Anything still pending for the merge?

I'm still thinking a bit about the approach since the board can still work isolatedly without much needed from nextcloud server
=> So user might no longer needed to correct their configurations to connect from the whiteboard server to nextcloud server
=> Data will be stay in the node server and never go to nextcloud storage if those connection issues not resolveed
=> Might introduce some security issues about read and write permissions to the file
=> ...

Not sure they're 100% related or might be in another ticket (Since users still need to aqquire jwt token from nextcloud server frequently but that's from FE => NC directly). Will think a bit more about that and will adjust the implementation at least to resolve some of. Want to know your thoughts on this @juliusknorr @grnd-alt too! Thank you!