Someone

#!/usr/bin/env ruby

require "db"
require "simple-rss"
require "open-uri"

$MIN_CONTENT = 10

while (true)
  categories = Category.find(:all)
  threads = []

  for category in categories
    threads << Thread.new(category) { |c|
      contents = Content.find(:all, :conditions => ['category_id = ?', c.id])

      if contents.count < $MIN_CONTENT
        needed = $MIN_CONTENT - contents.count
        feeds = Feed.find(:all, :conditions => ['category_id = ?', c.id])

        feeds.each { |feed|
          begin
            rss = SimpleRSS.parse open(feed.url)
            feed.lastused_at = Time.now
            feed.save

            for item in feed.items

            end
          rescue

          end
        }
      end
    }
  end

  threads.each { |t| t.join }
  sleep(600)
end