Activity email notifications for favorites only

Hi,

I am using NextCloud 16.0.4 which all seems to operating as expected for the most part. I am using cron for background tasks which also seems to be fine.

I am sharing folders with many sub-folders with groups of users whereby individual sub-folders are shared via public links. i.e. A top level folder is shared with a group and sub folders are shared with unauthenticated people via public links. The user group has access to all these sub folders by way of the parent group share. This works fine.

I have set individual users to “favorite” the sub folders they are interested in using. Out of 200+ sub folders a particular individual may only be regularly using a hand full.

My issue is I want users who have marked particular folders as “favorites” to get an email notification when files are added via the public link in one of their “favorite” folders.

I have ticked “mail” in activity settings for “A file has been added to or removed from your favorites” however this seems to have no affect at all as no email is ever sent. I am assuming this should do what I want but maybe I am miss reading its intended purpose.

If I tick “mail” for “A new file or folder has been created” and “A file or folder has been changed or renamed” then they do get an email, however they get an email whenever something changes in ANY of the 200+ folders - not just “favorite” folders. This creates far too much irrelevant email for users.

e.g folder structure.

GROUP FOLDER [SHARED TO GROUP]
±-- SUB FOLDER 1 [SHARED VIA LINK]
±-- SUB FOLDER 2 [SHARED VIA LINK]
±-- SUB FOLDER 3 [SHARED VIA LINK] also [MARKED AS FAVORITE BY USER1]
.
.
.
±-- SUB FOLDER 200 [SHARED VIA LINK] also [MARKED AS FAVORITE BY USER1]

So USER1 only wants an email if a file is changed in SUB FOLDER 3 and SUB FOLDER 200 via someone uploading via the associated public link.

Is this possible or is it beyond the capabilities of the Activities app?