coupons.rb

#################################### Solution ####################################

#### Module Rulecheck #### 
module Rulecheck
  TO_BLOCK =  ['!']
  def parse(string)
    TO_BLOCK.each do |to_block|
      return string.include?(to_block)
    end
  end 
end
#### Class Available Gift Options #### 
class Gift
  @@gifts = []
  attr_accessor :name, :value
  def initialize(name, value)
    @name, @value = name, value
    @@gifts << name
    @@gifts << value      
  end
  def self.gifts
    Hash[*@@gifts]
  end
end
#### Class Coupon For Users #### 
class Coupon
   @@coupons = []
  attr_accessor :amount, :options
  def initialize(amount, options = [])
    @@coupons << amount
    @@coupons << options
  end
  def self.coupons
    Hash[Hash[*@@coupons].to_a.reverse]    
  end  
end  
  
class Input
  include Rulecheck
  def get_gifts
    puts "Enter the Number of gifts Type :- "
    types = gets.chomp.to_i
    types.times do |i|
	    puts "Enter #{i}th gift Type with Credit :- "
	    new_gift ||= gets.chomp.split(' ')
	    gift =  Gift.new(new_gift[0],new_gift[1])
    end
  end
  
  def initialize
    get_gifts
  end
  
  def get_coupon
    puts "Enter the Your Amount and Coupon Options :- "    
    coupon = gets.chomp.split(' ')
    coupon = Coupon.new(coupon.first,coupon.drop(1)) 
    Coupon.coupons
  end
  
  def evaluate_delivery(gifts)
    gifts = Hash[gifts.sort_by {|k,v| v}.reverse]
    while true
      coupon = get_coupon
      @options = []
      coupon.values.first.each do |cv|
	      @options << cv 
	      @options << gifts["#{cv}"] 
      end
      amount = coupon.keys.first.to_i
      sorted_options = coupon["#{amount}"].sort{|x,y| gifts[y].to_i <=> gifts[x].to_i } 
      deliverables = deliver(amount,sorted_options,gifts)
      puts deliverables.inspect
    end
  end
  
  def deliver(amount,sorted_options,gifts)
    deliverables = []
    sorted_options.each do |option|
    	if amount >= gifts["#{option}"].to_i
     		deliverables << option unless parse(option.to_s)
     		amount -= gifts["#{option}"].to_i
     	end 
    end
   deliverables 
  end
  
end

input = Input.new
gift_list = Gift.gifts
input.evaluate_delivery(gift_list)