Contents

require 'cgi'
require 'rss/0.9'

require 'facet/string/first_char'

require 'nitro/mixin/markup'

module Nitro

# Build RSS represenations of ruby object collections.
# Utilize duck typing to grab the attributes to render.
# Add this mixin to you classes to support RSS rendering.
#
#--
# TODO: add more options here, 1.0/2.0 support and more.
# use custom version to add headers like the following.
# <?xml version="1.0" encoding="UTF-8"?>
# <?xml-stylesheet href="rss.css" type="text/css"?>
#++

module RssMixin
  include Nitro::Markup
  
  # === Options
  #
  # [+:description+]
  #    Description of the Feed
  # [+:base+]
  #    Base url of the Feed.
  # [+:link+]
  #    Link of the Feed.
  
  def build_rss_09(objects, options = {})
    c = {
      :description => 'Syndication'
    }.update(options)

    c[:base] ||= c[:link]

    raise "Option ':base' cannot be infered!" unless c[:base] 
  
    channel = RSS::Rss::Channel.new
    channel.description = c[:description]
    channel.link = c[:link] if c[:link] 
    
    for obj in objects
      item = RSS::Rss::Channel::Item.new
      item.title = obj.title if obj.respond_to?(:title)
      if obj.respond_to? :body and body = obj.body
        item.description = markup(body.first_char(256)) 
      end
      if obj.respond_to? :to_href
        item.link = "#{c[:base]}/#{obj.to_href}" 
      end
      channel.items << item
    end
    
    rss = RSS::Rss.new '0.9'
    rss.channel = channel
    
    return rss.to_s
  end
  alias_method :build_rss, :build_rss_09
  alias_method :rss, :build_rss_09

end

end

# * George Moschovitis <[e-mail]>

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
nitro-0.22.0	lib/nitro/mixin/rss.rb