Class: Muzak::Index

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/muzak/index.rb

Overview

Represents muzak's music index.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Utils

album_art?, #build_response, #debug, #debug?, #error, #error!, music?, #output, #pretty, resolve_command, resolve_method, #verbose, #verbose?, #warn, which?

Constructor Details

#initialize(file: INDEX_FILE) ⇒ Index

Returns a new instance of Index.

Parameters:

  • index_file (String) —

    the path of the index data file



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# File 'lib/muzak/index.rb', line 21

def initialize(file: INDEX_FILE)
  debug "loading index from '#{INDEX_FILE}'..."

  @hash = Marshal.load(File.read file)
end

Instance Attribute Details

#hash ⇒ Hash

Returns the index hash.

Returns:

  • (Hash) —

    the index hash



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# File 'lib/muzak/index.rb', line 18

def hash
  @hash
end

#tree ⇒ String

Returns the path of the root of the music tree.

Returns:

  • (String) —

    the path of the root of the music tree



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# File 'lib/muzak/index.rb', line 15

def tree
  @tree
end

Class Method Details

.load_index! ⇒ Object 



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# File 'lib/muzak/index.rb', line 6

def self.load_index!
  if File.exist?(INDEX_FILE)
    Index.new
  else
    error! "#{INDEX_FILE} missing, did you forget to run muzak-index?"
  end
end

Instance Method Details

#album_names ⇒ Array<String>

Note:

albums with the same name will appear, but can't be disambiguated from here

Returns a list of all albums in the index.

Returns:

  • (Array<String>) —

    a list of all albums in the index



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# File 'lib/muzak/index.rb', line 66

def album_names
  artists.map { |a| @hash["artists"][a]["albums"].keys }.flatten
end

#albums ⇒ Hash{String => Album}

Returns a hash of all album names with their Album objects.

Returns:

  • (Hash{String => Album}) —

    a hash of all album names with their Album objects



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# File 'lib/muzak/index.rb', line 44

def albums
  @albums_hash ||= begin
    albums_hash = {}

    artists.each do |a|
      @hash["artists"][a]["albums"].each do |title, album_hash|
        if deep?
          songs = album_hash["deep-songs"]
        else
          songs = album_hash["songs"].map { |s| Song.new(s) }
        end
        albums_hash[title] = Album.new(title, songs, album_hash["cover"])
      end
    end

    albums_hash
  end
end

#albums_by(artist) ⇒ Array<Album>

Returns all albums by the given artist.

Parameters:

  • artist (String) —

    the artist's name

Returns:

  • (Array<Album>) —

    all albums by the given artist



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# File 'lib/muzak/index.rb', line 72

def albums_by(artist)
  if artists.include?(artist)
    @hash["artists"][artist]["albums"].map do |title, album_hash|
      if deep?
        songs = album_hash["deep-songs"]
      else
        songs = album_hash["songs"].map { |s| Song.new(s) }
      end
      Album.new(title, songs, album_hash["cover"])
    end
  else
    error "no such artist: '#{artist}'" unless @hash["artists"].key?(artist)
    []
  end
end

#artists ⇒ Array<String>

Returns a list of all artists in the index.

Returns:

  • (Array<String>) —

    a list of all artists in the index



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# File 'lib/muzak/index.rb', line 38

def artists
  @artists ||= @hash["artists"].keys
end

#deep? ⇒ Boolean

Returns whether or not the current index is deep.

Returns:

  • (Boolean) —

    whether or not the current index is deep



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# File 'lib/muzak/index.rb', line 28

def deep?
  @hash["deep"]
end

#jukebox(count = 50) ⇒ Array<Song>

Produces a 'jukebox' of random songs.

Parameters:

  • count (Integer) (defaults to: 50) —

    the number of random songs to return

Returns:

  • (Array<Song>) —

    an array of randomly chosen songs



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# File 'lib/muzak/index.rb', line 91

def jukebox(count = 50)
  @all_albums ||= @hash["artists"].map { |_, a| a["albums"] }.flatten

  if deep?
    @all_deep_songs ||= @all_albums.map { |aa| aa.map { |_, a| a["deep-songs"] } }.flatten
    @all_deep_songs.sample(count)
  else
    @all_songs ||= @all_albums.map { |aa| aa.map { |_, a| a["songs"] } }.flatten
    @all_songs.sample(count).map { |s| Song.new(s) }
  end
end

#songs_by(artist) ⇒ Array<Song>

Note:

no inter-album order is guaranteed. songs within an album are generally sorted by track number.

Returns an array of all the artist's songs.

Parameters:

  • artist (String) —

    the artist's name

Returns:

  • (Array<Song>) —

    an array of all the artist's songs



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# File 'lib/muzak/index.rb', line 107

def songs_by(artist)
  error "no such artist: '#{artist}'" unless @hash["artists"].key?(artist)

  begin
    albums_by(artist).map do |album|
      album.songs
    end.flatten
  rescue Exception => e
    []
  end
end

#timestamp ⇒ Integer

Returns the UNIX timestamp from when the index was built.

Returns:

  • (Integer) —

    the UNIX timestamp from when the index was built



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# File 'lib/muzak/index.rb', line 33

def timestamp
  @hash["timestamp"]
end