Have permissions rules for if a certain thing is set or not

So I am having some trouble trying to set so that a user cant edit a certain field after it has been set and when creating one it wont allow you to go higher then a certain number or that you cant set that by yourself for instance

For that you'll probably have to wrap to whole logic within a function.
And, Let the user have just read access.

So, all the writing - with the conditions - happens only on the server side.

Hmmm would be cool if the added that because I am right now using pocketbase and pushing out whole lot of things with ease but appwrite has a better system overall

Agree that would be cool.
It's probably be difficult to cover any permissions use case