Brainstorm for Clearwater routing callbacks

router.rb

class Router
  def navigate_to path
    current_targets = targets_for_path(current_path)
    new_targets = targets_for_path(path)
    (current_targets - new_targets).each do |from_target|
      if from_target.respond_to?(:will_transition_from)
        from_target.will_transition_from
      end
    end
    (new_targets - current_targets).each do |to_target|
      if to_target.respond_to?(:will_transition_to)
        to_target.will_transition_to
      end
    end
    
    # do whatever it does currently
  end
end