Check if object is snapped

Hi everybody,

I am trying to implment an interaction where the user (1) grabs an Interactable object and snaps it to a predefined position and then (2) has the option to translate transform that same object to a specific position. 

I did encount a few problems/question that I couldn't solve yet. 

1. How can I check, if an object is snapped to a predefined snaplocation? I want to achieve, that I then can deactivate and activate the relevant Grab Transformers and maybe snap locations

2. How can I check, if an object is transformed (through one grab translate transformer) to a specific position and then lock it there while still active? I want the object to be able to be translate-transformed again, but only on  a release and grab, not while keeping it grabbed (active). 

Any help is greatly appreciated. I suppose I have to code a little bit which I don't have a big problem with, however a starting point would be of great help to me.

Thank you 🙂