add the ability to get Actor, Director, Artist, Producer, and Screenwrit...

itunes.gemspec

@@ -29,9 +29,9 @@ Gem::Specification.new do |s|
   s.add_development_dependency('json', '~> 1.6')
 
   s.add_runtime_dependency('rash', '~> 0.3')
-  s.add_runtime_dependency('faraday_middleware', '~> 0.7')
+  s.add_runtime_dependency('faraday_middleware', '~> 0.9')
   s.add_runtime_dependency('multi_json', '~> 1.0')
-  
+
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }

lib/itunes.rb

@@ -1,4 +1,5 @@
 require 'faraday_middleware'
+require 'nokogiri'
 require 'itunes/configuration'
 require 'itunes/client'
 

lib/itunes/client.rb

@@ -21,6 +21,7 @@ def initialize(options={})
     include Request
     include Search
     include Lookup
+    include AdditionalMetadata
 
   end
 end

lib/itunes/client/additional_metadata.rb

@@ -0,0 +1,20 @@
+module ITunes
+  module AdditionalMetadata
+    PEOPLE_TYPES=%w(Actor Director Artist Producer Screenwriter)
+    def read_people(people_type, html)
+      raise ArgumentError, "you must pass #{PEOPLE_TYPES.join('|')}" unless PEOPLE_TYPES.include?( people_type )
+      nodes = html.xpath("//div[starts-with(@metrics-loc,'Titledbox_#{people_type}')]")
+      nodes.map{|n|n.search('.//a').map{|a|a.text}}.flatten
+    end
+    def get_additional_metadata(result)
+      raise ArgumentError, 'you must pass in a single result object containing track_url' unless result && result.track_view_url
+      html = Nokogiri::HTML(Faraday.new.get(result.track_view_url.gsub(/\?.*/,'')).body)
+      additional_metadata = PEOPLE_TYPES.inject({}) do |hash, type|
+        hash["#{type}s"]=read_people(type, html)
+        hash
+      end
+      additional_metadata
+    end
+  end
+end
+

lib/itunes/client/search.rb

@@ -92,4 +92,4 @@ def search(term, media='all', options={})
     end
 
   end
-end
+end