I'd like my code to be able to apply potion effects added by other mods, but the IDs of those potion effects aren't necessarily static (certain mods allow you to change the potion IDs via a config file). So instead of doing something like:

 

entityPlayer.addPotionEffect(new PotionEffect(48, 200));

 

I'd prefer to do something like:

 

entityPlayer.addPotionEffect(new PotionEffect("witchery:potion.insane", 200));

 

But I'm not sure how to get the corresponding integer ids from the unlocalized names of the potions.

Iterate through

Potion.potionTypes

until you find a

Potion

that returns the specified name from

Potion#getName

. You'll probably want to do this once at startup rather than every time you apply the effect.