XMLをObjectに変換

xml_to_object.rb

require 'faraday'
require 'rexml/document'
require 'ostruct'
require 'uri'
require 'pp'

def get(name)
  conn = Faraday::Connection.new(url: 'https://services.addons.mozilla.org')
  response = conn.get(URI.encode "/ja/firefox/api/1.5/search/#{name}")
  doc = REXML::Document.new(response.body)
  
  build = lambda do |elem|
    obj = OpenStruct.new
    
    elem.attributes.each do |(k,v)|
      obj.send("#{k}=", v)
    end
    
    celems = elem.elements
    if celems.empty? then
      obj.to_s = elem.texts.join.strip
    else
      celems.each do |elem|
        value = obj.send(elem.name)
        if value.nil? then
          obj.send("#{elem.name}=", build[elem])
        else
          obj.send("#{elem.name}=", [value]) unless value.instance_of? Array
          obj.send(elem.name).push build[elem]
        end
      end
    end
    
    return obj
  end
  
  build[doc.root]
end

pp get('Vimperator').addon.first