module FeedModel
  module Cache
    require 'active_support/concern'
    extend ActiveSupport::Concern
    extend self
    included do
      before_save :do_before_save
    end
    def recreate_annc_cache(feed)
      count = SiteFeedAnnc.where(feed_id: feed.id).count
      if count>1
        SiteFeedAnnc.where(feed_id: feed.id).limit(count-1).destroy
      end
      tmp = SiteFeedAnnc.where(feed_id: feed.id).first
      if tmp.nil?
        tmp = SiteFeedAnnc.new(feed_id: feed.id)
      end
      tmp[:feed_name] = feed[:feed_name]
      tmp.merge_with_category = feed.merge_with_category
      tmp.channel_key = feed.channel_key
      tmp.category_title = feed.category[:title] rescue {}
      tmp.remote_site_url = feed.remote_site_url
      tmp.channel_title = feed.channel_title_for_cache
      tmp.all_contents_for_feed = tmp.cache_annc(true)
      tmp.save
    end
    def do_before_save
      if self.class == Category
        Thread.new do
          SiteFeedAnnc.where(merge_with_category: self.id.to_s).each do |site_feed_annc|
            recreate_annc_cache(site_feed_annc)
          end
        end
      elsif self.class == SiteFeed
        if self.disabled != true
          Thread.new do
            recreate_annc_cache(self)
          end
        else
          tmp = SiteFeedAnnc.where(feed_id: self.id).first
          if !tmp.nil?
            tmp.destroy
          end
        end
      end
    end
  end
end