Alright, so I tried to describe the bot the best I could in the title, but allow me to describe it further...

• When a user posts, it needs to compare that post's time/date with the user's flair css:

• If the date is newer, then if longer than X days, remove the old post; if less than X days, remove the new post.

• If flair css is not a compatible date or is empty, set the flair css to the current post's time/date.

• If Link post's URL, or text post's contents, doesn't contain a link from a specific domain, remove the post and message user.

• Settings to set frequency the bot checks the subreddit, how many days old a post has to be to replace an old one, and optionally it would be nice to either set it to run on multiple subreddits or run multiple instances with an inline argument to denote subreddit.

• Optionally: If flair is empty, comment on their post or message the user with a definable message (so it could be set to give a welcome message, link rules, etc).

It would be nice to have the feature that it does not affect moderators, as PSA posts might get in the way and etc.

I could probably think of a few extra features, like containing a MySQL database of links posted and ensuring that link is only posted once a week. If posted by two different users, message the mods.. But I don't want to overload the request with more than can be done.

This is a huge make or break for a rule change in our subreddit of over 2.6k with daily activity, which will make it even more active if we make the change. So we would be extremely grateful for any assistance with this bot. Serious, it would be a life saver.

Thanks for reading and your consideration! :)