Blackjack Submission

Gemfile

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+# frozen_string_literal: true
+source "https://rubygems.org"
+ruby "2.2.6"
+
+# gem "rails"
+gem 'sinatra'
+gem 'sinatra-contrib'
+gem 'json'

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    backports (3.6.8)
+    json (1.8.6)
+    multi_json (1.12.1)
+    rack (1.6.5)
+    rack-protection (1.5.3)
+      rack
+    rack-test (0.6.3)
+      rack (>= 1.0)
+    sinatra (1.4.8)
+      rack (~> 1.5)
+      rack-protection (~> 1.4)
+      tilt (>= 1.3, < 3)
+    sinatra-contrib (1.4.7)
+      backports (>= 2.0)
+      multi_json
+      rack-protection
+      rack-test
+      sinatra (~> 1.4.0)
+      tilt (>= 1.3, < 3)
+    tilt (2.0.6)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  json
+  sinatra
+  sinatra-contrib
+
+BUNDLED WITH
+   1.13.7

README.md

@@ -2,3 +2,5 @@
 Hit me baby one more time?
 
 [A Blackjack game using the Ruby Sinatra web application framework which uses object oriented programming, cookies, sessions, and JSON from the Viking Code School](http://www.vikingcodeschool.com)
+
+Yi-Xuan Lau

app.rb

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+require 'sinatra'
+require 'sinatra/reloader' if development?
+require 'json'
+require 'erb'
+require_relative 'lib/player'
+require_relative 'lib/deck'
+require './helpers/sessions'
+
+enable :sessions
+
+helpers Sessions
+
+get '/' do
+  player = load_player(session['player']) if session['player']
+  session.clear
+  set_up_player(player) if player
+  erb :index
+end
+
+get '/bet' do
+  bank = session['player'] ? Player.new(session['player']).bank : 1000
+  erb :bet, :locals => { 'redirect' => session['redirect_message'], 'bank' => bank}
+end
+
+post '/bet' do
+  player = Player.new(session['player'])
+  player.bet = params[:bet].to_i
+  if player.bank < player.bet
+    session['redirect_message'] = "Sorry, you only have $#{player.bank}<br> Please enter a different amount:<br>"
+    redirect '/bet'
+  end
+  save_player('player', player)
+  redirect '/blackjack'
+end
+
+get '/blackjack' do
+  deck = Deck.new(session['deck'])
+  player = Player.new(session['player'])
+  dealer = AI.new(session['dealer'])
+  deck.deal(player, dealer) unless session['on']
+  if dealer.blackjack? || player.blackjack?
+    deck.settle_winnings(player, dealer)
+    session['game_over'] = true
+  end
+
+  session['on'] = true
+  save_player('dealer', dealer)
+  save_player('player', player)
+  save_deck(deck)
+  erb :blackjack, :locals => {'deck' => deck, 'dealer' => dealer, 'player' => player, 'game_over' => session[:game_over], 'double' => session[:double]}
+end
+
+post '/blackjack/hit' do
+  deck = Deck.new(session['deck'])
+  player = Player.new(session['player'])
+  deck.hit(player)
+  save_deck(deck)
+  save_player('player', player)
+  redirect "/blackjack/stay" if player.sum > 21 || session['double']
+  redirect '/blackjack'
+end
+
+get '/blackjack/stay' do
+  dealer = AI.new(session['dealer'])
+  deck = Deck.new(session['deck'])
+  player = Player.new(session['player'])
+  deck.hit(dealer) until dealer.enough?
+  deck.settle_winnings(player, dealer)
+  save_player('player', player)
+  session['game_over'] = true
+  save_player('dealer', dealer)
+  redirect '/blackjack'
+end
+
+post '/blackjack/double' do
+  session['double'] = true
+  deck = Deck.new(session['deck'])
+  player = Player.new(session['player'])
+  deck.hit(player)
+  save_deck(deck)
+  player.bet *= 2
+  save_player('player', player)
+  redirect to("/blackjack/stay")
+end

config.ru

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+require './app.rb'
+run Sinatra::Application

helpers/sessions.rb

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+module Sessions
+  def save_deck(deck)
+    session['deck'] = deck.cards.to_json
+  end
+
+  def save_player(n, player)
+    bundle = { 'hand' => player.hand,
+               'bank' => player.bank,
+               'bet' => player.bet,
+               'status' => player.status}
+    session[n] = bundle.to_json
+  end
+
+  def load_player(session)
+    player = JSON.parse(session)
+    player.delete('hand')
+    player.delete('bet')
+    player
+  end
+
+  def set_up_player(player)
+    player = Player.new(player.to_json)
+    save_player('player', player)
+  end
+end

lib/deck.rb

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+class Deck
+  attr_accessor :cards
+  def initialize(cards=nil)
+    @cards = cards ? JSON.parse(cards) : make_deck
+  end
+
+  def make_deck
+    %w{2 3 4 5 6 7 8 9 10 J Q K A}.product(%w{diamonds clubs hearts spades}).shuffle
+  end
+
+  def deal(one, two)
+    2.times do
+      s = @cards.sample
+      one.hand << s if one.hand.size < 2
+      @cards.delete(s)
+      s = @cards.sample
+      two.hand << s  if two.hand.size < 2
+      @cards.delete(s)
+    end
+  end
+
+  def hit(player)
+    s = @cards.sample
+    player.hand << s
+    @cards.delete(s)
+  end
+
+  def settle_winnings(player, dealer)
+    if player.sum > 21 || player.sum < dealer.sum && dealer.sum < 21 || dealer.sum == 21 && player.sum != 21
+      player.bank -= player.bet
+      player.status = :loss
+    elsif player.sum == 21 && dealer.sum != 21 || player.sum > dealer.sum && player.sum < 21 || dealer.sum > 21
+      player.bank += player.bet
+      player.status = :win
+    elsif  player.blackjack? && ! dealer.blackjack?
+      player.bank += player.bet * 1.5
+      player.status = :blackjack
+    elsif dealer.blackjack? && ! player.blackjack?
+      player.bank -= player.bet * 1.5
+      player.status = :loss
+    else
+      player.status = :tie
+    end
+  end
+end

lib/player.rb

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+class Player
+  attr_accessor :hand, :bank, :bet, :status
+  def initialize(opts=nil)
+    opts = opts ? JSON.parse(opts) : {}
+    @hand = opts['hand'] ? opts['hand'] : []
+    @bank = opts['bank'] ? opts['bank'] : 1000
+    @bet = opts['bet'] ? opts['bet'] : 0
+    @status = opts['status']
+  end
+
+  def sum
+    sum = 0
+    ace = false
+    @hand.each do |card|
+      if card[0] == 'A'
+        ace = true
+      elsif card[0] == 'K' || card[0] == 'J' || card[0] == 'Q'
+        sum += 10
+      else
+        sum += card[0].to_i
+      end
+    end
+    if ace
+      sum = sum + 11 <= 21 ? sum + 11 : sum + 1
+    end
+    sum
+  end
+
+  def blackjack?
+    self.sum == 21
+  end
+
+end
+
+class AI < Player
+  def enough?
+    self.sum >= 17
+  end
+end

public/custom.css

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+.container {
+  margin-top: 80px;
+}
+body {
+  font-family: "Roboto Mono", Menlo, "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif;
+}
+.card {
+  font-size: 10em;
+  margin-top: -20px;
+}
+.card .logo-right {
+  transform: rotate(15deg);
+}
+.card .logo-left {
+  transform: rotate(-15deg);
+}
+.card > div {
+  display: inline-block;
+  margin-top: -20px;
+}
+.card.small {
+  font-size: 2.5em;
+  display: inline-block;
+  margin-left: 1em;
+}
+.suit.red {
+  color: red;
+}
+form {
+  display: inline-block;
+  margin-top: 1em;
+}
+.card-display {
+  margin: 3em auto 1em;
+}