The Oscars 2015 - OOP in Ruby

1-pojos.rb

class Genre
  MALE = 'man'
  FEMALE = 'woman'

  def self.count
    2
  end
end

class Actor
  attr_accessor :firstname, :lastname, :genre

  def initialize(firstname, lastname, genre)
    ...
  end

  def name; "#{@firstname} #{@lastname}" end

  def speak; puts speech end

  private

  def speech
    "Hi! I'm #{name}. I'm a #{@genre} and I would like to thank my mom."
  end
end

class Director
  attr_accessor :firstname, :lastname, :number_of_movies

  def initialize(firstname, lastname, number_of_movies)
    ...
  end

  def name; "#{@firstname} #{@lastname}" end

  def speak; puts speech end

  private

  def speech
    "Hi! I'm #{name}. I directed #{@number_of_movies} movies and I would like to thank my dad."
  end
end

brad = Actor.new('Brad', 'Pitt', Genre::MALE)
brad.speak
steven = Director.new('Steven', 'Spielberg', 15)
steven.speak

2-inheritance.rb

class Genre
  MALE = 'man'
  FEMALE = 'woman'

  def self.count
    2
  end
end

class Nomenee
  def initialize(firstname, lastname)
    @firstname = firstname
    @lastname = lastname
  end

  def name
    "#{@firstname} #{@lastname}"
  end

  # template method
  def speak
    puts speech
  end
end

class Actor < Nomenee
  def initialize(firstname, lastname, genre)
    super firstname, lastname
    @genre = genre
  end

  private

  def speech
    "Hi! I'm #{name}. I'm a #{@genre} and I would like to thank my mom."
  end
end

class Director < Nomenee
  def initialize(firstname, lastname, number_of_movies)
    super firstname, lastname
    @number_of_movies = number_of_movies
  end

  private

  def speech
    "Hi! I'm #{name}. I directed #{@number_of_movies} movies and I would like to thank my dad."
  end
end

brad = Actor.new('Brad', 'Pitt', Genre::MALE)
brad.speak
steven = Director.new('Steven', 'Spielberg', 15)
steven.speak

3-modules.rb

module Oscars
  class Genre
    MALE = 'man'
    FEMALE = 'woman'

    def self.count
      2
    end
  end

  module Speaker
    def speak
      say "Hi!"
      say speech
      say "Thanks"
    end

    private
    
    def say(something)
      puts "#{self.class}: #{something}"
    end
  end

  class Presenter
    include Speaker

    private

    def speech
      "Welcome to The Oscars"
    end
  end

  class Person
    include Speaker

    def initialize(firstname, lastname)
      @firstname = firstname
      @lastname = lastname
    end

    def name
      "#{@firstname} #{@lastname}"
    end
  end

  class Actor < Person
    def initialize(firstname, lastname, genre)
      super firstname, lastname
      @genre = genre
    end

    private

    def speech
      "I'm #{name}. I'm a #{@genre} and I would like to thank my mom."
    end
  end

  class Director < Person
    def initialize(firstname, lastname, number_of_movies)
      super firstname, lastname
      @number_of_movies = number_of_movies
    end

    private

    def speech
      "I'm #{name}. I directed #{@number_of_movies} movies and I would like to thank my dad."
    end
  end
end

presenter = Oscars::Presenter.new
brad = Oscars::Actor.new('Brad', 'Pitt', Oscars::Genre::MALE)
steven = Oscars::Director.new('Steven', 'Spielberg', 15)

[presenter, brad, steven].each do |speaker|
  speaker.speak
end

# Presenter: Hi!
# Presenter: Welcome to The Oscars
# Presenter: Thanks
# Actor: Hi!
# Actor: I'm Brad Pitt. I'm a man and I would like to thank my mom.
# Actor: Thanks
# Director: Hi!
# Director: I'm Steven Spielberg. I directed 15 movies and I would like to thank my dad.
# Director: Thanks