Urine is a nasty liquid containing a mixture of salts which tend to be conductive when even slightly damp. Your hard drive is almost certainly OK so data recovery should not be a problem if it comes to that, but your keyboard will have taken the brunt of it.
If you are quite happy doing things like taking laptops to pieces then I suspect at the mininum you are going to have to take the keyboard out and clean it. I would suggest a good rinsing in several changes of water, a final rinse in distilled water and then a good spray of something like iso-propyl alchohol and leave it to dry thoroughly in a warm and ventilated area. You are probably going to have to give the mobo a good clean as well, paying special attention to the connectors.
BEFORE you start any of this, disconnect the charger and remove the battery ! And if you wish guidance on the tear down have a look on YouTube for your make and model of laptop.