simple_as_mapper.rb

gistfile1.rb

require 'rubygems'
require 'nokogiri'
require 'yajl'
require 'json'

txt = File.read(ARGV[0])

xml = Nokogiri::XML(txt).root

AS_PREFIX = "http://activitystrea.ms/schema/1.0/"

class Node
  
  def initialize(xml)
    @xml = xml
    @h = {}
  end
  
  def convert
    @xml.children.each do |child|
      send("on_#{child.name.gsub("-","_")}", child)
    end
    @h
  end
  
  def method_missing(m, *args, &block)  
    # We should do nothing here :)
  end 
  
  def on_link(node)
    @h[:links] ||= []
    @h[:links].push({
      :href => node[:href],
      :title => node[:title],
      :rel => node[:rel],
      :type => node[:type]
    })
  end
  
  def on_title(node)
    @h[:title] = node.text
  end
  
  def on_id(node)
    @h[:id] = node.text
  end
  
  def on_published(node)
    @h[:postedTime] = node.text
  end
  
  def updated(node)
    # WTF? TOFIX
  end
  
  def on_object_type(node)
    @h[:objectType] = node.text.gsub(AS_PREFIX, "")
  end
  
  def on_content(node)
    @h[:content] = node.text
  end
  
  def on_summary(node)
    @h[:summary] = node.text
  end
  
  def on_author(node)
    @h[:actor] ||= Author.new(node).convert
  end
  
  def on_id(node)
    @h[:id] = node.text
  end
  
end

class Author < Node
  
  def on_name(node)
    @h[:displayName] = node.text
  end
  
  def on_uri(node)
    @h[:permalinkUrl] = node.text
  end
  
  def on_email(node)
    # Seems like we could ignore it to match the AS spec?
  end
  
  def on_link(node)
    if node[:type] =~ /image\/./
      @h[:image] = {
        :url => node[:href]
      }
    else
      super(node)
    end
  end
  
end

class ASObject < Node
  
end

class Entry < Node
  
  def on_point(node)
    @h[:latitude], @h[:longitude] = node.text.split(" ")
  end
  
  def on_category(node)
    @h[:categories] ||= []
    @h[:categories].push(node[:term])
  end
  
  def on_verb(node)
    @h[:verb] = node.text.gsub(AS_PREFIX, "") if node.text =~ /#{AS_PREFIX}/
  end
  
  def on_object(node)
    @h[:object] ||= ASObject.new(node).convert
  end

end

class Feed < Node
  def on_entry(node)
    @h[:items] ||= []
    @h[:items].push Entry.new(node).convert
  end
end

puts JSON.pretty_generate(Feed.new(xml).convert)