For @dhouk24, our resident gambling squirrel. (end of week 2 @ dbc)

balance.txt

20.00

slots_o_fun.rb

# v0.2 features 
# (to be created):
# implement flashcards program as option to increase bankroll
# (give flashcards program ability to offer list of decks to user to choose from)
# implement "help" call to display rules, etc.

# DONE:
# increased payout on 2 ruby gems, increased cost of each slot pull
# fixed convert_result ranges (14 was allowed to be both a ruby and a seven)
# create Player class // DONE
# assign Player a saveable bankroll // DONE

class SlotMachine
	attr_reader :first, :second, :third, :ruby_count, :seven_count, :balance, :player

	SEVEN =[
	"           ",
	" ========, ",
	"       //  ",
	"      //   ",
	"     //    ",
	"    //     ",
	"           "
	]

	RUBY = [
	"           ",
	" _________ ",
	"/_|_____|_\\",
	"'. \\   / .'",
	"  '.\\ /.'  ",
	"    '.'    ",
	"           "
	]

	ZERO = [
	"           ",
	" ========= ",
	"||\\\\\\|///||",
	"||ooooooo||",
	"||\\\\\\|///||",
	" ========= ",
	"           "
	]

	SPACE = " " * 5

	def initialize
		@player = Player.new("Gambling Dan")
	end

	def pull!
		@player.balance -= 0.20
		@first = convert_result(rand(16))
		@second = convert_result(rand(16))
		@third = convert_result(rand(16))
		@ruby_count = 0
		@seven_count = 0
	end

	def convert_result(value)
		case value
		when 0..11 then ZERO
		when 12..14 then RUBY
		when 15 then SEVEN
		end
	end

	def format_second
		i = -1
		@second.map do |line|
			i += 1
			@first[i] + SPACE + line
		end
	end

	def format_third
		i = -1
		@third.map do |line|
			i += 1
			@first[i] + SPACE + @second[i] + SPACE + line
		end
	end

	def count_wins
		slot_result = []
		slot_result << @first << @second << @third
		slot_result.each do |slot|
			@ruby_count += 1 if slot == RUBY
			@seven_count += 1 if slot == SEVEN
		end
	end

	def update_balance
		@player.balance += 0.10 if @ruby_count == 1
		@player.balance += 0.30 if @ruby_count == 2
		@player.balance += 1.00 if @ruby_count == 3
		@player.balance += 0.40 if @seven_count == 1
		@player.balance += 1.00 if @seven_count == 2
		@player.balance += 2.00 if @seven_count == 3
	end

	def save_balance
		File.open('balance.txt', 'wb') { |file| file.puts @player.balance }
	end
end

class Player
	attr_accessor	:balance
	def initialize(name = "")
		@name = name
		@balance = File.read('balance.txt').to_f
	end
end

class SlotControl
	attr_accessor :viewer, :machine
	def initialize
		@viewer = SlotView.new
		@machine = SlotMachine.new
		@response = ""
	end

	def show_slot(slot)
		viewer.move_to_home!
		viewer.print_balance(@machine.player.balance)
		viewer.print_slot(slot)
		sleep(0.7)
	end

	def update_balance
		machine.count_wins
		machine.update_balance
		viewer.print_new_balance(@machine.player.balance)
	end

	def play!
		until @response == "q"
			viewer.clear_screen!
			machine.pull!
			show_slot(machine.first)
			show_slot(machine.format_second)
			show_slot(machine.format_third)	
			update_balance
			viewer.play_again
			@response = gets.chomp.downcase
		end
		machine.save_balance
	end
end

class SlotView
	def move_to_home!
	  print "\e[H"
	end

	def clear_screen!
	  print "\e[2J"
	end

	def print_slot(slot)
		slot.each { |line| puts line }
	end

	def print_balance(balance)
		printf("Starting bankroll: $%.2f\n", balance)
	end

	def print_new_balance(balance)
		printf("Ending bankroll: $%.2f\n", balance)
	end

	def print_win(winnings)
		print "Yay, you won $" + winnings
	end

	def print_lose
		print "Sorry, you did not win anything this turn."
	end

	def play_again
		puts "Press ENTER to play again!"
		puts "(or type \"q\" at any time to cash out)"
	end
end

SlotControl.new.play!