There are some older books like: https://www.amazon.co.uk/Machine-Patterns-Leonard-Publishing... which is just tabulating lots of common rhythm patterns from a wide number of genres.

and some more modern ones like: https://op-forums.com/t/pocket-operations-a-portable-book-of...

Neither of these are online though and would be well suited to it I agree.

A quick search also came up with: http://808.pixll.de/ which has drum patterns uploaded by users for popular songs