Orbit/vendor/built_in_modules/feed/lib/rss_dynamic.rb

# encoding: utf-8
require 'rss'
require 'mongo'

# Change this according to local DB
DB_NAME = "production_0" 

# Create a hash rss site list from mongodb
db = Mongo::Connection.new("localhost", 27017).db("#{DB_NAME}")
SITES = Hash[ db["announcement_feeds"].find().entries.collect {|f| [ f["name"], f["link"] ] } ]
CATEGORIES = Array(db["announcement_feeds"].find().entries.collect {|f| f["categories"]  })

yesterday = Time.now - 86400
two_weeks_ago = Time.new - 60 * 60 * 24 * 14

recent_feed = {}

SITES.each_with_index do |(name, url), i|
  open("http://#{url}/panel/announcement/front_end/bulletins.rss?inner=true") do |rss|

    # Giving 'false' parameter is for skipping irregular format of the RSS
    feed = RSS::Parser.parse(rss, false)

    feed.items.each do |item|
      category = item.category.to_s.gsub(/\<(\/)*category\>/, '')

      if item.pubDate > yesterday && CATEGORIES[i].include?(category) 
        recent_feed[item.title.strip] = { date: item.pubDate, description: item.description.gsub("\r\n", '<br/>').strip,
          link: item.link, category: category, source: name }
      end

    end
  end
end

def get_category_id(category, categories, coll_cat)
  if categories.keys.include? "rss_#{category}"
    [categories["rss_#{category}"], categories]
  else
    cat = {
      _type: "BulletinCategory",
      key: "rss_#{category}",
      disable: false,
      title: {:zh_tw => category},
      created_at: Time.now,
      updated_at: Time.now
    }
    categories["rss_#{category}"] = result = coll_cat.save(cat)
    [result, categories]
  end
end

def get_mongo_and_categories
  db = Mongo::Connection.new("localhost", 27017).db("#{DB_NAME}")
  coll_bulletin = db["bulletins"]
  coll_cat =  db["bulletin_categories"]

  categories = coll_cat.find().to_a.inject({}) do |categories, category|
    categories[category['key']] = category['_id']
    categories
  end

  [categories, coll_bulletin, coll_cat]
end

recent_feed.each do |title, bulletin|

  categories, coll_bulletin, coll_cat = get_mongo_and_categories
  category_id, categories = get_category_id(bulletin[:category], categories, coll_cat)

  unless coll_bulletin.find_one(rss_link: bulletin[:link]) 
    bulletin = {  _type: "Bulletin",
                  postdate: bulletin[:date],
                  created_at: bulletin[:date],
                  updated_at: bulletin[:date],
                  is_checked: true,
                  is_pending: false,
                  is_rejected: false,
                  bulletin_category_id: category_id,
                  title: {:zh_tw => title},
                  text: {:zh_tw => bulletin[:description]},
                  available_for_zh_tw: true,
                  rss_link: bulletin[:link],
                  rss_source: bulletin[:source],
                  is_top: false,
                  is_hot: false,
                  is_hidden: false }

    coll_bulletin.save(bulletin) 
  end
end