class ContestActivity < ActiveRecord::Base
  attr_accessible :contest_act_id, :contest_act_type, :user_id, :contest_id

  belongs_to :user
  belongs_to :contest
  belongs_to :contest_act ,:polymorphic => true
  has_many :user_acts, :class_name => 'UserAcivity',:as =>:act
  after_create :add_user_activity
  before_destroy :destroy_user_activity

  #在个人动态里面增加当前动态
  def add_user_activity
    user_activity = UserActivity.where("act_type = '#{self.contest_act_type.to_s}' and act_id = '#{self.contest_act_id}'").first
    if user_activity
      user_activity.save
    else
      if self.contest_act_type == 'Message' && !self.contest_act.parent_id.nil?
        user_activity = UserActivity.where("act_type = 'Message' and act_id = #{self.contest_act.parent.id}").first
        user_activity.created_at = self.created_at
        user_activity.save
      else
        user_activity = UserActivity.new
        user_activity.act_id = self.contest_act_id
        user_activity.act_type = self.contest_act_type
        user_activity.container_type = "Contest"
        user_activity.container_id = self.contest_id
        user_activity.user_id = self.user_id
        user_activity.save
      end
    end
  end

  def destroy_user_activity
    user_activity = UserActivity.where("act_type = '#{self.contest_act_type.to_s}' and act_id = '#{self.contest_act_id}'")
    user_activity.destroy_all
  end
end