Done

Gemfile.lock

@@ -7,7 +7,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    require_all (2.0.0)
+    require_all (1.5.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -27,7 +27,7 @@ PLATFORMS
 
 DEPENDENCIES
   pry
-  require_all
+  require_all (~> 1.0)
   rspec
 
 BUNDLED WITH

lib/artist.rb

@@ -0,0 +1,46 @@
+require 'pry'
+
+class Artist
+  extend Concerns::Findable
+
+  attr_accessor :name
+
+  @@all = []
+
+  def initialize(name)
+    @name = name
+    @songs = []
+  end
+
+  def add_song(song)
+    song.artist = self if song.artist.nil?
+    @songs << song unless @songs.include?(song)
+  end
+
+  def songs
+    @songs
+  end
+
+  def genres
+    self.songs.collect {|song| song.genre}.uniq
+  end
+
+  def save
+    @@all << self
+  end
+
+  def self.create(name)
+    artist = self.new(name)
+    artist.save
+    artist
+  end
+
+  def self.all
+    @@all
+  end
+
+  def self.destroy_all
+    @@all = []
+  end
+
+end

lib/concerns/findable.rb

@@ -0,0 +1,19 @@
+module Concerns::Findable
+
+  def find_by_name(name)
+    item = self.all.select {|item| item.name == name}
+    if item.length() > 0
+      item[0]
+    end
+  end
+
+  def find_or_create_by_name(name)
+    item = self.find_by_name(name)
+    if !item
+      self.create(name)
+    else
+      item
+    end
+  end
+
+end

lib/genre.rb

@@ -0,0 +1,44 @@
+class Genre
+  extend Concerns::Findable
+
+  attr_accessor :name
+
+  @@all = []
+
+  def initialize(name)
+    @name = name
+    @songs = []
+  end
+
+  def add_song(song)
+    song.genre = self if song.genre.nil?
+    @songs << song unless @songs.include?(song)
+  end
+
+  def songs
+    @songs
+  end
+
+  def artists
+    self.songs.collect {|song| song.artist}.uniq
+  end
+
+  def save
+    @@all << self
+  end
+
+  def self.create(name)
+    genre = self.new(name)
+    genre.save
+    genre
+  end
+
+  def self.all
+    @@all
+  end
+
+  def self.destroy_all
+    @@all = []
+  end
+
+end

lib/musicimporter.rb

@@ -0,0 +1,24 @@
+require 'pry'
+
+class MusicImporter
+
+  attr_accessor :path, :files
+
+  def initialize(path)
+    @path = path
+    @files = []
+  end
+
+  def files
+    files = Dir[@path + "/**/*.mp3"]
+    files.map! {|file| file.gsub(@path + "/","")}
+    files.each {|file| @files << file unless @files.include?(file)}
+    @files
+  end
+
+  def import
+    files
+    @files.each {|file| Song.create_from_filename(file)}
+  end
+
+end

lib/musiclibrarycontroller.rb

@@ -0,0 +1,112 @@
+class MusicLibraryController
+
+  attr_accessor :path
+
+  def initialize(path="./db/mp3s")
+    @path = path
+    musicimporter = MusicImporter.new(@path)
+    musicimporter.import
+  end
+
+  def call
+    puts("Welcome to your music library!")
+    puts("To list all of your songs, enter 'list songs'.")
+    puts("To list all of the artists in your library, enter 'list artists'.")
+    puts("To list all of the genres in your library, enter 'list genres'.")
+    puts("To list all of the songs by a particular artist, enter 'list artist'.")
+    puts("To list all of the songs of a particular genre, enter 'list genre'.")
+    puts("To play a song, enter 'play song'.")
+    puts("To quit, type 'exit'.")
+    puts("What would you like to do?")
+
+    command = ""
+    until command == "exit"
+      command = gets.chomp
+      case command
+        when "list songs"
+          list_songs
+        when "list artists"
+          list_artists
+        when "list genres"
+          list_genres
+        when 'list artist'
+          list_songs_by_artist
+        when 'list genre'
+          list_songs_by_genre
+        when 'play song'
+          play_song
+      end
+    end
+
+  end
+
+  def list_songs(no_msg=false)
+    song_list = Song.all.sort_by {|song| song.name}
+    song_list.each do |song|
+      #"1. Thundercat - For Love I Come - dance"
+      puts "#{song_list.index(song)+1}. #{song.artist.name} - #{song.name} - #{song.genre.name}" if no_msg == false
+    end
+    song_list
+  end
+
+  def list_artists
+    artist_list = Artist.all.sort_by {|artist| artist.name}
+    artist_list.each do |artist|
+      # "1. Action Bronson"
+      puts "#{artist_list.index(artist)+1}. #{artist.name}"
+    end
+  end
+
+  def list_genres
+    genre_list = Genre.all.sort_by {|genre| genre.name}
+    genre_list.each do |genre|
+      # "1. country"
+      puts "#{genre_list.index(genre)+1}. #{genre.name}"
+    end
+  end
+
+  def list_songs_by_artist
+    puts "Please enter the name of an artist:"
+    artist_name = gets.chomp
+    artist_selected = Artist.all.find {|artist| artist.name == artist_name}
+
+    if artist_selected
+      song_list = artist_selected.songs.sort_by {|song| song.name}
+      song_list.each do |song|
+        # "1. Green Aisles - country"
+        puts "#{song_list.index(song)+1}. #{song.name} - #{song.genre.name}"
+      end
+    end
+  end
+
+  def list_songs_by_genre
+    puts "Please enter the name of a genre:"
+    genre_name = gets.chomp
+    genre_selected = Genre.all.find {|genre| genre.name == genre_name}
+
+    if genre_selected
+      song_list = genre_selected.songs.sort_by {|song| song.name}
+      song_list.each do |song|
+        # "1. Real Estate - It's Real"
+        puts "#{song_list.index(song)+1}. #{song.artist.name} - #{song.name}"
+      end
+    end
+  end
+
+  def play_song
+    puts "Which song number would you like to play?"
+    song_number = gets.chomp
+
+    if song_number.to_i > 0
+      song_number = song_number.to_i - 1
+      song_list = list_songs(true)
+      song_selected = song_list[song_number]
+
+      if song_selected
+        # "Playing Larry Csonka by Action Bronson"
+        puts "Playing #{song_selected.name} by #{song_selected.artist.name}"
+      end
+    end
+  end
+
+end

lib/song.rb

@@ -0,0 +1,78 @@
+require 'pry'
+
+class Song
+
+  attr_accessor :name, :artist, :genre
+
+  @@all = []
+
+  def initialize(name,artist=nil,genre=nil)
+    @name = name
+    # @artist = artist
+    self.artist=(artist) if !artist.nil?
+    # @genre = genre
+    self.genre=(genre) if !genre.nil?
+  end
+
+  def save
+    @@all << self
+  end
+
+  def artist=(artist)
+    @artist = artist
+    artist.add_song(self)
+  end
+
+  def genre=(genre)
+    @genre = genre
+    genre.add_song(self)
+  end
+
+  def self.create(name)
+    song = self.new(name)
+    song.save
+    song
+  end
+
+  def self.find_by_name(name)
+    song = self.all.select {|song| song.name == name}
+    if song.length() > 0
+      song[0]
+    end
+  end
+
+  def self.find_or_create_by_name(name)
+    song = self.find_by_name(name)
+    if !song
+      self.create(name)
+    else
+      song
+    end
+  end
+
+  def self.new_from_filename(name)
+    song_parts = name.split(' - ')
+
+    song = self.create(song_parts[1])
+    song.artist=(Artist.find_or_create_by_name(song_parts[0]))
+    song.genre=(Genre.find_or_create_by_name(song_parts[2].gsub(".mp3","")))
+
+    song
+  end
+
+  def self.create_from_filename(name)
+    if !self.find_by_name(name.split(' - ')[1])
+      song = self.new_from_filename(name)
+      song
+    end
+  end
+
+  def self.all
+    @@all
+  end
+
+  def self.destroy_all
+    @@all = []
+  end
+
+end