Class: Kagu::Playlists

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/kagu/playlists.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(library) ⇒ Playlists

Returns a new instance of Playlists.

Raises:

  • (ArgumentError) 


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# File 'lib/kagu/playlists.rb', line 9

def initialize(library)
  raise ArgumentError.new("#{self.class}#library must be a library, #{library.inspect} given") unless library.is_a?(Library)
  @library = library
end

Instance Attribute Details

#library ⇒ Object (readonly)

Returns the value of attribute library.



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# File 'lib/kagu/playlists.rb', line 7

def library
  @library
end

Instance Method Details

#build(attributes = {}) ⇒ Object 



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# File 'lib/kagu/playlists.rb', line 14

def build(attributes = {})
  Playlist.new(attributes)
end

#create(attributes = {}) ⇒ Object 



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# File 'lib/kagu/playlists.rb', line 18

def create(attributes = {})
  build(attributes).tap(&:save)
end

#each(&block) ⇒ Object 



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# File 'lib/kagu/playlists.rb', line 22

def each(&block)
  return unless block_given?
  tracks = {}.tap do |tracks|
    library.tracks.each { |track| tracks[track.id] = track }
  end
  File.open(library.path, 'r') do |file|
    begin
      line = file.readline.strip
    end while !line.starts_with?('<key>Playlists</key>')
    playlist_name = nil
    playlist_tracks = []
    skip_next = false
    while !file.eof? && (line = file.readline.strip)
      if line == '<key>Master</key><true/>'
        playlist_name = nil
        skip_next = true
        next
      end
      if line == '</array>'
        yield(Playlist.new(itunes_name: playlist_name, tracks: playlist_tracks)) if playlist_name.present? && playlist_tracks.any?
        playlist_name = nil
        playlist_tracks = []
        next
      end
      match = line.match(/<key>(.+)<\/key><(\w+)>(.*)<\/\2>/)
      next unless match
      name = match[1]
      value = match[3]
      if name == 'Name'
        if skip_next
          skip_next = false
        else
          playlist_name = value
        end
      elsif name == 'Track ID'
        playlist_tracks << tracks[value.to_i]
      end
    end
  end
end