Artist, Release Group, Release models

lib/models/music_brainz_artist.rb

@@ -0,0 +1,30 @@
+class MusicBrainzArtist  
+  attr_accessor :id, :type, :name, :country, :date_begin, :date_end
+  @release_groups
+  
+  def release_groups
+    if @release_groups.nil? and not self.id.nil?
+      @release_groups = []
+      Nokogiri::XML(open('http://musicbrainz.org/ws/2/release-group/?artist=' + self.id)).css('release-group').each do |rg|
+        @release_groups << MusicBrainzReleaseGroup.parse_xml(rg)
+      end
+    end
+    @release_groups
+  end
+  
+  def self.find mbid
+    @artist = self.parse_xml(Nokogiri::XML(open('http://musicbrainz.org/ws/2/artist/' + mbid)))
+  end
+  
+  def self.parse_xml xml
+    @artist = MusicBrainzArtist.new
+    @artist.id = xml.css('artist').attr('id').value
+    @artist.type = xml.css('artist').attr('type').value
+    @artist.name = xml.css('artist > name').text
+    @artist.country = xml.css('artist > country').text || nil
+    @artist.date_begin = xml.css('artist > life-span > begin').text || nil
+    @artist.date_end = xml.css('artist > life-span > end').text || nil
+    @artist
+  end
+  
+end

lib/models/music_brainz_release.rb

@@ -0,0 +1,38 @@
+class MusicBrainzRelease
+  attr_accessor :id, :title, :status, :date, :country
+  @tracks
+  
+  def tracks
+    if @tracks.nil? and not self.id.nil?
+      @tracks = []
+      Nokogiri::XML(open('http://musicbrainz.org/ws/2/release/' + self.id + '?inc=recordings')).css('release').each do |r|
+        @tracks << MusicBrainzRelease.parse_xml(r)
+      end
+    end
+    @tracks
+  end
+  
+  def self.find mbid
+    xml = Nokogiri::XML(open('http://musicbrainz.org/ws/2/release/' + mbid)).css('release').first
+    self.parse_xml(xml) unless xml.nil?
+  end
+  
+  def self.parse_xml xml
+    @release = MusicBrainzRelease.new
+    @release.id = xml.attr('id')
+    @release.title = xml.css('title').text
+    @release.status = xml.css('status').text
+    date = xml.css('date').text
+    unless date.nil? or date.empty?
+      if date.length == 4
+        date += '-01-01'
+      elsif date.length == 7
+        date += '-01'
+      end
+      date = Time.parse(date)
+    end
+    @release.date = date
+    @release.country = xml.css('country').text
+    @release
+  end
+end

lib/models/music_brainz_release_group.rb

@@ -0,0 +1,37 @@
+class MusicBrainzReleaseGroup
+  attr_accessor :id, :type, :title, :first_release_date
+  @releases
+  
+  def releases
+    if @releases.nil? and not self.id.nil?
+      @releases = []
+      Nokogiri::XML(open('http://musicbrainz.org/ws/2/release/?release-group=' + self.id)).css('release').each do |r|
+        @releases << MusicBrainzRelease.parse_xml(r)
+      end
+    end
+    @releases
+  end
+  
+  def self.find mbid
+    xml = Nokogiri::XML(open('http://musicbrainz.org/ws/2/release-group/' + mbid)).css('release-group').first
+    self.parse_xml(xml) unless xml.nil?
+  end
+  
+  def self.parse_xml xml
+    @release_group = MusicBrainzReleaseGroup.new
+    @release_group.id = xml.attr('id')
+    @release_group.type = xml.attr('type')
+    @release_group.title = xml.css('title').text
+    date = xml.css('first-release-date').text
+    unless date.nil? or date.empty?
+      if date.length == 4
+        date += '-01-01'
+      elsif date.length == 7
+        date += '-01'
+      end
+      date = Time.parse(date)
+    end
+    @release_group.first_release_date = date
+    @release_group
+  end
+end

lib/models/music_brainz_track.rb

@@ -0,0 +1,3 @@
+class MusicBrainzTrack
+  
+end

lib/musicbrainz.rb

@@ -0,0 +1,8 @@
+require "open-uri"
+require "nokogiri"
+require "awesome_print"
+
+require "models/music_brainz_artist"
+require "models/music_brainz_release_group"
+require "models/music_brainz_release"
+require "models/music_brainz_track"