I pored over an idea to access personalised RSS-feeds since ages. I implemented this in a very simple way for MLF1 for a RSS-reader as a browser plugin. The reader plugin spotted a login in the browser because of the existing cookies. With providing URL-parameters for the categories, I was able to access also internal categories (access only for registered users or admins and mods). But there was no solution for stand alone readers and no real authorisation check.
Now I stumbled over access tokens for RSS-feeds in Gitlab (we run an instance at work). With the token the software selects the content, a user is allowed to see. What brings my old idea up again.
With such a personal token for every registered user the program could select the content of the feed respecting the category selection of the matching user or, in case of admins and mods, inform about new users, the amount of new entries or, if implemented, about abuse notices.
This would be also a possible way to reduce the amount of e-mails. Especially members of a forum-team should be interested to minimise the personal e-mail-traffic and should also be able to use a RSS-reader.
We would need an additional field in the user data table and in the user edit form, a function to generate a new token and last but not least a logic in
rss.inc.php to validate the submitted token and to select the relevant data.
Trenne niemals Müll, denn er hat nur eine Silbe!