Creating a switch for checking if a GameObject has a Script attached

Hey Community, I am trying to create a way to manage a mouse click in one class. Depending on what kind of GameObject is clicked: the object will do an action. I am planning on making Clickable Objects into an interface all containing a clickedOn() method, but I've been wrapping my head around the possibility of a Switch/Case statement that checks if a GameObject contains specific Scripts. The switch statement will then do an action depending on what kind of Script it finds on the object.