11-subclass.rb

# subclass
require_relative '07-classes.rb'

module GameDepot
  # constant
  CORPORATE_SLOGAN = "You can play it. We can help."

  class UsedGame < Game
    # class variable
    @@slogan = "All used games come with limited warranties"

    attr_accessor :condition
    
    def initialize(title,price,genre,condition)
      super(title,price,genre) 
      @condition = condition
      adjust_price_condition
    end
    
    def adjust_price_condition
      return if @price <= 10
      if @condition == "Very Good" 
        @price -= 5
      elsif @condition == "Good"
        @price -= 10
      elsif @condition == "Acceptable"
        @price -= 15
      end
    end
   
    # class method, self keyword can be replaced with the class name
    def self.warranty(condition)
        return "One Month" if condition == "Like New" 
        return "Two Month" if condition == "Very Good" 
        return "Three Month" if condition == "Good" 
        return "Four Month" if condition == "Acceptable" 
    end

    # reader for class variable
    def self.get_slogan
      @@slogan
    end
  end
  
end