20 odd lines of a dirty hack for a Microformats parser (thanks to open-uri and Hpricot).

%w(rubygems hpricot open-uri).each {|l| require l}
module Microformats
  class Microformat < Struct
    def self.for(uri)
      mf = new
      name = mf.class.name.split('::').last.downcase
      doc = Hpricot(open(uri))
      members.each do |m|
        eval %{
          val = doc%('.#{name} .#{m.gsub('_', '-')}')
          mf.#{m} = val.inner_text.strip if not val.nil?
        }
      end
      mf
    end
    class << self; alias :/ :for end
  end
end

Adding support for microformat specifications can be achieved as:

module Microformats
  class MyFormat < Microformat.new(:x, :y, :z);end
end

Where :x, :y, :z are the Microformat's properties.
As a more concrete example, let's add support for (part of) HReview:

class HReview < Microformat.new(:summary, :fn,
                                :dtreviewed, :description,
                                :rating);end

In action...

include Microformats

hr = HReview.for('http://www.amk.ca/books/h/Velocity_of_Honey')
p hr.fn

# => "The Velocity of Honey: And More Science of Everyday Life"

... or even slicker...

hr = HReview/'http://www.amk.ca/books/h/Velocity_of_Honey'

This entry was posted on Thursday, May 24th, 2007 at 11:20 pm and is filed under Microformats, Software. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.