From having briefly looked at the code, db.GetObjects only accepts a whitelist of IDs to look up.
I suppose you could submit a Pull Request, but if the same feature is not available in Redis then you are creating a feature that only exists in some of the supported storage systems, which increases complexity of the NodeBB project.

It looks like NodeJS + MongoDB does support query by RegExp.
My guess is that you would want to detect the data type of the first parameter passed into db.GetObjects similar to the following:

re = new RegExp('.');
'object' === typeof re && re instanceof RegExp;

nodebb-plugin-stockparser parses UGC for StockTwit-style stock tickers and replaces them with a link to the stock detail page.

Can anyone point me to a plugin that already has an admin panel page which has an editable field where I can define a URL pattern? TIA