created new track_search binding to allow searching for tracks (really recordings). Modified existing model classes to call super() to handle search (open/closed principle, attempting to reduce duplicate code). Fixed xml namespace issue in specs.

.gitignore

@@ -3,3 +3,4 @@ coverage
 tmp
 Gemfile.lock
 .gem
+*.swp

Contributors

@@ -4,3 +4,4 @@ Applicat (https://github.com/Applicat)
 Jens Fahnenbruck (https://github.com/jigfox)
 Sander Nieuwenhuizen (https://github.com/munkius)
 Savater Sebastien (https://github.com/blakink)
+Thomas Wolfe (https://github.com/tomwolfe)

Gemfile

@@ -1,2 +1,2 @@
-source :rubygems
+source 'https://rubygems.org'
 gemspec

README.md

@@ -80,9 +80,9 @@ MusicBrainz::ReleaseGroup
 ```ruby
 # Class Methods
 MusicBrainz::ReleaseGroup.find(id)
-MusicBrainz::ReleaseGroup.find_by_artist_and_title(artist_name, title, type: 'Album')
+MusicBrainz::ReleaseGroup.find_by_artist_and_title(artist_name, title, 'Album') # 3rd arg optional
 MusicBrainz::ReleaseGroup.search(artist_name, title)
-MusicBrainz::ReleaseGroup.search(artist_name, title, type: 'Album')
+MusicBrainz::ReleaseGroup.search(artist_name, title, 'Album') # 3rd arg optional
 
 # Instance Methods
 @release_group.releases
@@ -125,6 +125,7 @@ MusicBrainz::Track
 ```ruby
 # Class Methods
 MusicBrainz::Track.find(id)
+MusicBrainz::ReleaseGroup.search(artist_name, track_name)
 
 # Fields
 {

lib/musicbrainz.rb

@@ -29,6 +29,7 @@ require "musicbrainz/bindings/release_group_releases"
 require "musicbrainz/bindings/release"
 require "musicbrainz/bindings/release_tracks"
 require "musicbrainz/bindings/track"
+require "musicbrainz/bindings/track_search"
 
 module MusicBrainz
   GH_PAGE_URL = "http://git.io/brainz"

lib/musicbrainz/bindings/track_search.rb

@@ -0,0 +1,21 @@
+# encoding: UTF-8
+module MusicBrainz
+  module Bindings
+    module TrackSearch
+      def parse(xml)
+        xml.xpath('./recording-list/recording').map do |xml|
+          {
+            id: (xml.attribute('id').value rescue nil),
+            mbid: (xml.attribute('id').value rescue nil), # Old shit
+            title: (xml.xpath('./title').text.gsub(/[`’]/, "'") rescue nil),
+            artist: (xml.xpath('./artist-credit/name-credit/artist/name').text rescue nil),
+						releases: (xml.xpath('./release-list/release/title').map{ |xml| xml.text } rescue []),
+						score: (xml.attribute('score').value.to_i rescue nil)
+          } rescue nil
+        end.delete_if{ |item| item.nil? }
+      end
+
+      extend self
+    end
+  end
+end

lib/musicbrainz/models/artist.rb

@@ -25,11 +25,7 @@ module MusicBrainz
       end
 
       def search(name)
-        name = CGI.escape(name).gsub(/\!/, '\!')
+				super({artist: name})
-
-        client.load(:artist, { query: "artist:#{name}", limit: 10 }, {
-          binding: :artist_search
-        })
       end
 
       def discography(mbid)

lib/musicbrainz/models/base_model.rb

@@ -23,6 +23,38 @@ module MusicBrainz
       def client
         MusicBrainz.client
       end
+
+			def search(hash)
+				hash = escape_strings(hash)
+				query_val = build_query(hash)
+				underscore_name = self.name[13..-1].underscore
+				client.load(underscore_name.to_sym, { query: query_val, limit: 10 }, { binding: underscore_name.insert(-1,"_search").to_sym })
+			end
+
+			class ::String
+				def underscore
+					self.gsub(/::/, '/').
+					gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
+					gsub(/([a-z\d])([A-Z])/,'\1_\2').
+					tr("-", "_").
+					downcase
+				end
+			end
+
+			def build_query(hash)
+				return ["#{hash.first[0].to_s}:\"#{hash.first[1]}\""] if hash.size ==1
+				arr ||= []
+				hash.each { |k, v| arr << "#{k.to_s}:\"#{hash[k]}\"" }
+				arr.join(' AND ')
+			end
+
+			def escape_strings(hash)
+				hash.each { |k, v| hash[k] = CGI.escape(v).gsub(/\!/, '\!') }
+				hash
+			end
+
+			# these probably should be private... but I'm not sure how to get it to work in a module...
+			# private_class_method :build_query, :escape_strings
     end
 
     module InstanceMethods

lib/musicbrainz/models/release_group.rb

@@ -25,20 +25,16 @@ module MusicBrainz
         })
       end
       
-      def search(artist_name, title, options = {})
+      def search(artist_name, title, type = nil)
-        artist_name = CGI.escape(artist_name).gsub(/\!/, '\!')
+				if type
-        title = CGI.escape(title).gsub(/\!/, '\!')
+					super({artist: artist_name, releasegroup: title, type: type})
-        query = ["artist:\"#{artist_name}\"", "releasegroup:\"#{title}\""]
+				else
-        query << "type: #{options[:type]}" if options[:type]
+					super({artist: artist_name, releasegroup: title})
-
+				end
-        client.load(
-          :release_group, { query: query.join(' AND '), limit: 10 }, 
-          { binding: :release_group_search }
-        )
       end
       
-      def find_by_artist_and_title(artist_name, title, options = {})
+      def find_by_artist_and_title(artist_name, title, type = nil )
-        matches = search(artist_name, title, options)
+        matches = search(artist_name, title, type)
         matches.empty? ? nil : find(matches.first[:id])
       end
     end

lib/musicbrainz/models/track.rb

@@ -12,6 +12,10 @@ module MusicBrainz
           create_model: :track
         })
       end
+
+			def search(artist_name, track_name)
+				super({artist: artist_name, recording: track_name})
+			end
     end
   end
 end

spec/bindings/release_group_search_spec.rb

@@ -5,8 +5,8 @@ require "spec_helper"
 describe MusicBrainz::Bindings::ReleaseGroupSearch do
   describe '.parse' do
     it "gets correct release group data" do
-      response = '<release-group-list><release-group id="246bc928-2dc8-35ba-80ee-7a0079de1632" type="Single" ext:score="100"><title>Empire</title></release-group>'
+      response = '<metadata xmlns="http://musicbrainz.org/ns/mmd-2.0#" xmlns:ext="http://musicbrainz.org/ns/ext#-2.0"><release-group-list><release-group id="246bc928-2dc8-35ba-80ee-7a0079de1632" type="Single" ext:score="100"><title>Empire</title></release-group></release-group-list></metadata>'
-      described_class.parse(Nokogiri::XML.parse(response)).should == [
+      described_class.parse(Nokogiri::XML.parse(response).remove_namespaces!.xpath('/metadata')).should == [
         {
           id: '246bc928-2dc8-35ba-80ee-7a0079de1632', mbid: '246bc928-2dc8-35ba-80ee-7a0079de1632', 
           title: 'Empire', type: 'Single', score: 100
@@ -14,4 +14,4 @@ describe MusicBrainz::Bindings::ReleaseGroupSearch do
       ]
     end
   end
-end
+end

spec/bindings/track_search_spec.rb

@@ -0,0 +1,17 @@
+# -*- encoding: utf-8 -*-
+
+require "spec_helper"
+
+describe MusicBrainz::Bindings::TrackSearch do
+  describe '.parse' do
+    it "gets correct Track (really recording) data" do
+			response = '<metadata xmlns="http://musicbrainz.org/ns/mmd-2.0#" xmlns:ext="http://musicbrainz.org/ns/ext#-2.0"><recording-list offset="0" count="1"><recording id="0b382a13-32f0-4743-9248-ba5536a6115e" ext:score="100"><title>King Fred</title><artist-credit><name-credit><artist id="f52f7a92-d495-4d32-89e7-8b1e5b8541c8"><name>Too Much Joy</name></artist></name-credit></artist-credit><release-list><release id="8442e42b-c40a-4817-89a0-dbe663c94d2d"><title>Green Eggs and Crack</title></release></release-list></recording></recording-list></metadata>'
+      described_class.parse(Nokogiri::XML.parse(response).remove_namespaces!.xpath('/metadata')).should == [
+        {
+          id: '0b382a13-32f0-4743-9248-ba5536a6115e', mbid: '0b382a13-32f0-4743-9248-ba5536a6115e', 
+          title: 'King Fred', artist: 'Too Much Joy', releases: ['Green Eggs and Crack'], score: 100
+        }
+      ]
+    end
+  end
+end

spec/models/release_group_spec.rb

@@ -31,13 +31,13 @@ describe MusicBrainz::ReleaseGroup do
         matches = MusicBrainz::ReleaseGroup.search('Kasabian', 'Empire')
         matches.length.should be > 0
         matches.first[:title].should == 'Empire'
-        matches.first[:type].should == 'Single'
+        matches.first[:type].should == 'Album'
       end
     end
     
     context 'with type filter' do
       it "searches release group by artist name and title" do
-        matches = MusicBrainz::ReleaseGroup.search('Kasabian', 'Empire', type: 'Album')
+        matches = MusicBrainz::ReleaseGroup.search('Kasabian', 'Empire', 'Album')
         matches.length.should be > 0
         matches.first[:title].should == 'Empire'
         matches.first[:type].should == 'Album'
@@ -48,7 +48,7 @@ describe MusicBrainz::ReleaseGroup do
   describe '.find_by_artist_and_title' do
     it "gets first release group by artist name and title" do
       release_group = MusicBrainz::ReleaseGroup.find_by_artist_and_title('Kasabian', 'Empire')
-      release_group.id.should == '246bc928-2dc8-35ba-80ee-7a0079de1632'
+      release_group.id.should == '6f33e0f0-cde2-38f9-9aee-2c60af8d1a61'
     end
   end