RPG Maker VX Ace run common event on state removal

gistfile1.rb

module StateRemoveCommonEventsKal
  
  TAG_NAME = "srce"
  
  class IDExtractor
    def get_common_event_id_for_state(state_id)
      rpg_state = get_rpg_state(state_id)
      extract_common_event_id(rpg_state.note)
    end
    
    private
    
    def get_rpg_state(state_id)
      $data_states.find do |rpg_state| 
        rpg_state && rpg_state.id == state_id
      end
    end

    def extract_common_event_id(note)
      id = note[/<#{TAG_NAME}\s+(\d+)\s*>/, 1]
      id.nil? ? nil : id.to_i
    end
  end
  
  class CommonEventRunner
    def run(common_event_id)
      page = make_page(common_event_id)
      $game_troop.interpreter.setup(page.list)
    end
    
    private
    
    def make_page(id)
      page = RPG::Troop::Page.new
      # 117 => common event code, 0 => indent, id => id of common event
      page.list.unshift(RPG::EventCommand.new(117, 0, [id]))
      page
    end
  end
  
  @id_extractor = IDExtractor.new
  @common_event_runner = CommonEventRunner.new
    
  def self.run_event_from_state(state_id)
    event_id = @id_extractor.get_common_event_id_for_state(state_id)
    @common_event_runner.run(event_id) if event_id
  end
end

class Game_BattlerBase
  alias_method :erase_state_srce_kal, :erase_state
  
  def erase_state(state_id)
    StateRemoveCommonEventsKal.run_event_from_state(state_id)
    erase_state_srce_kal(state_id)
  end
end

HI! omg this post is super duper old I hope u respond but I am so totally not going to use it without asking u first, could I use this for a project that may or may not be commercial? I would add credit obv.

Of course, go ahead and use/edit as you see fit.