Allow (Inherited) Folder Restriction In Data Object/Document Tree

[blankse]

Q	A
Branch?	4.x
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no
Fixed tickets	#190

[solverat]

Hey @blankse, if this is still relevant (this year was one hell of ride for us, so sorry for my very very late reponse):

Could you rebase this on 5.x (remove the o_ prefix)?

I also just checked your PR and there is this (quite big) issue, described in the ticket (#190):

"Check if children are valid candidates (based on allowed_objects for data objects, and page for documents)"

It's quite hard, to determinate if there are matching object within the folder, there could be thousand of objects in there. So I think there is more work to do.

However, I also noticed within your PR:

• Documents:
  • It seems to work: Only documents of type page will be recognized, also the ui in backend (folder icon) applies correctly
• Objects, if I'm applying groups to the object folder:
  • no icon appears (because of the missing check in TreeListener) on folder level
  • a restriction will be added to all its children, regardless of the configured classes which is not what we want (only apply them to the configured allowed_objects