group_service.rb

class Admin::GroupsController < Admin::BaseController
  def delete_all_groups
    GroupService.new(current_user, @group).delete_all_groups
  end
end

class GroupService
  def initialize(user, group)
    @user = user
    @group = group
  end
  
  def delete_all_groups(params)
      
  end
  
  private
    def validate_user_password(password)
       @user.validate_password(password)   
    end
end