main.rb

require_relative 'item'
require_relative 'book'
require_relative 'label'
require_relative 'catalog'

class Main
  def initialize
    @catalog = Catalog.new
  end

  def run
    puts 'Welcome to the Catalog of my Personal Things'
    loop do
      display_menu
      option = gets_option
      break if option == 13

      handle_option(option)
    end
    puts 'Thank you for using this app!'
  end

  private

  def display_menu
    puts '1) List all books'
    puts '2) List all music albums'
    puts '3) List all movies (disabled)'
    puts '4) List of games'
    puts '5) List all genres'
    puts '6) List all labels'
    puts '7) List all authors'
    puts '8) List all sources (disabled)'
    puts '9) Add a book'
    puts '10) Add a music album'
    puts '11) Add a movie (disabled)'
    puts '12) Add a game'
    puts '13) Exit the app'
  end

  def gets_option
    print 'Enter your option here: '
    gets.chomp.to_i
  end

  def handle_option(option)
    method_name = option_methods[option]
    if method_name
      send(method_name)
    else
      puts 'Invalid option'
    end
  end

  def option_methods
    {
      1 => :list_all_books,
      2 => :list_all_music_albums,
      3 => :list_all_movies,
      4 => :list_all_games,
      5 => :list_all_genres,
      6 => :list_all_labels,
      7 => :list_all_authors,
      8 => :list_all_sources,
      9 => :add_a_book,
      10 => :add_a_music_album,
      11 => :add_a_movie,
      12 => :add_a_game
    }
  end

  def list_all_books
    @catalog.list_all_books
  end

  def list_all_music_albums
    @catalog.list_all_music_albums
  end

  def list_all_movies
    @catalog.list_all_movies
  end

  def list_all_games
    @catalog.list_all_games
  end

  def list_all_genres
    @catalog.list_all_genres
  end

  def list_all_labels
    @catalog.list_all_labels
  end

  def list_all_authors
    @catalog.list_all_authors
  end

  def list_all_sources
    @catalog.list_all_sources
  end

  def add_a_book
    @catalog.add_a_book
  end

  def add_a_music_album
    @catalog.add_a_music_album
  end

  def add_a_movie
    @catalog.add_a_movie
  end

  def add_a_game
    @catalog.add_a_game
  end
end

Main.new.run