Finished BlackJack with Sinatra

Gemfile

@@ -0,0 +1,9 @@
+source 'https://rubygems.org'
+
+gem 'sinatra'
+gem 'json'
+
+group :development do
+  gem 'pry-byebug'
+  gem 'sinatra-contrib'
+end

Gemfile.lock

@@ -0,0 +1,46 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    backports (3.8.0)
+    byebug (9.0.6)
+    coderay (1.1.1)
+    json (2.1.0)
+    method_source (0.8.2)
+    multi_json (1.12.1)
+    mustermann (1.0.0)
+    pry (0.10.4)
+      coderay (~> 1.1.0)
+      method_source (~> 0.8.1)
+      slop (~> 3.4)
+    pry-byebug (3.4.2)
+      byebug (~> 9.0)
+      pry (~> 0.10)
+    rack (2.0.3)
+    rack-protection (2.0.0)
+      rack
+    sinatra (2.0.0)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.0)
+      tilt (~> 2.0)
+    sinatra-contrib (2.0.0)
+      backports (>= 2.0)
+      multi_json
+      mustermann (~> 1.0)
+      rack-protection (= 2.0.0)
+      sinatra (= 2.0.0)
+      tilt (>= 1.3, < 3)
+    slop (3.6.0)
+    tilt (2.0.7)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  json
+  pry-byebug
+  sinatra
+  sinatra-contrib
+
+BUNDLED WITH
+   1.15.1

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)
+<br>
+Mariah Schneeberger

app.rb

@@ -0,0 +1,97 @@
+require 'sinatra'
+require 'erb'
+require 'json'
+require 'pry-byebug'
+require 'sinatra/reloader' if development?
+require './helpers/blackjack_helpers.rb'
+
+
+enable :sessions
+
+helpers BlackJackHelpers
+
+before do
+  @deck = Deck.new
+end
+
+get '/' do
+  erb :home
+end
+
+# starts bet before cards are dealt
+get '/blackjack/bet' do
+  @user = HumanPlayer.new(@deck.deal_cards(2))
+  @dealer = Dealer.new(@deck.deal_cards(2))
+  save_variables
+  erb :betting_form
+end
+
+post '/blackjack/bet' do
+  restore_variables
+  @user.bet = params[:bet].to_i
+  @bet_string = params[:bet]
+  save_variables
+  if @user.bet > @user.bankroll || @bet_string =~ /\D/i || @bet_string =~ /[a-z]/i
+    erb :betting_form
+  else
+    redirect to('/blackjack/play')
+  end
+end
+
+# shuffles deck and deal hands to dealer and player
+get '/blackjack/play' do
+  restore_variables
+  @user.bankroll -= @user.bet
+  get_scores(@user, @dealer)
+  save_variables
+  if @user_score == 21 || @dealer_score == 21
+    if @user_score == 21
+      @user.bankroll += (@user.bet * 2.5)
+    end
+    erb :blackjack_win
+  else
+    erb :blackjack
+  end
+end
+
+
+# adds a card to the players hand and re-renders the main page
+# if hitting would bust player (over 21 total) redirect to get /blackjack/stay
+post "/blackjack/hit" do
+  restore_variables
+  @user.hand << @deck.deal_cards(1).flatten
+  get_scores(@user, @dealer)
+  save_variables
+  if @user_score >= 21
+    redirect to('/blackjack/stay')
+  end
+  erb :blackjack
+end
+
+
+# gets dealer to play their hand - either hit or stay depending on if product is 17 or higher
+# render main page with all cards revealed and describes the result
+get '/blackjack/stay' do
+  restore_variables
+  get_scores(@user, @dealer)
+  if @user_score > 21
+    save_variables
+    erb :blackjack_stay
+  else
+    dealers_turn(@dealer)
+    @user.payout(@user_score, @dealer_score)
+  end
+  save_variables
+  erb :blackjack_stay
+end
+
+get '/blackjack/new_game' do
+  redirect to('/blackjack/bet')
+end
+
+get '/blackjack/play_again' do
+  @user = HumanPlayer.new(@deck.deal_cards(2), session[:user_bankroll])
+  @dealer = Dealer.new(@deck.deal_cards(2))
+  save_variables
+  erb :betting_form
+end

helpers/blackjack_helpers.rb

@@ -0,0 +1,54 @@
+require_relative 'deck'
+require_relative 'player'
+
+module BlackJackHelpers
+
+
+  def save_variables
+    session[:dealer_hand] = @dealer.hand
+    session[:user_hand] = @user.hand
+    session[:user_bankroll] = @user.bankroll
+    session[:user_bet] = @user.bet
+    session[:deck] = @deck
+  end
+
+  def restore_variables
+    restore_user
+    restore_dealer
+    restore_deck
+  end
+
+
+  def get_scores(user, dealer)
+    @user_score = user.get_score
+    @dealer_score = dealer.get_score
+  end
+
+
+  def dealers_turn(dealer)
+    while @dealer_score <= 17
+      @dealer.hand << @deck.deal_cards(1).flatten
+      @dealer_score = @dealer.get_score
+    end
+  end
+
+
+  private
+
+
+  def restore_deck
+    @deck = session[:deck]
+  end
+
+
+  def restore_user
+    @user = HumanPlayer.new(session[:user_hand], session[:user_bankroll], session[:user_bet])
+  end
+
+
+  def restore_dealer
+    @dealer = Dealer.new(session[:dealer_hand])
+  end
+
+
+end

helpers/deck.rb

@@ -0,0 +1,17 @@
+class Deck
+
+  def initialize
+    face = [2,3,4,5,6,7,8,9,10,"J","Q","K","A"]
+    suit = ["hearts", "spades", "clubs", "diamonds"]
+    @deck = face.product(suit)
+  end
+
+  def deal_cards(num_of_cards)
+    hand = @deck.sample(num_of_cards)
+    hand.each do |card_in_hand|
+      @deck.delete_if { |card_in_deck| card_in_deck == card_in_hand }
+    end
+    hand
+  end
+
+end

helpers/player.rb

@@ -0,0 +1,112 @@
+class Player
+
+  attr_accessor :hand
+
+  def initialize(hand)
+    @hand = hand
+    @scores = {
+      '2' => 2,
+      '3' => 3,
+      '4' => 4,
+      '5' => 5,
+      '6' => 6,
+      '7' => 7,
+      '8' => 8,
+      '9' => 9,
+      '10' => 10,
+      'J' => 10,
+      'Q' => 10,
+      'K' => 10,
+      'A' => 11
+    }
+  end
+
+  def get_score
+    score = @hand.reduce(0) do |s, i|
+      s += @scores[i[0].to_s]
+    end
+    if score > 21 && @hand.any? {|x| x[0] == "A"}
+      score = score - 10
+    end
+    score
+  end
+
+end
+
+
+class HumanPlayer < Player
+
+  attr_accessor :hand, :bankroll, :bet
+
+  def initialize(hand, bankroll=1000, bet=0)
+    @hand = hand
+    @bankroll = bankroll
+    @bet = bet
+    @scores = {
+      '2' => 2,
+      '3' => 3,
+      '4' => 4,
+      '5' => 5,
+      '6' => 6,
+      '7' => 7,
+      '8' => 8,
+      '9' => 9,
+      '10' => 10,
+      'J' => 10,
+      'Q' => 10,
+      'K' => 10,
+      'A' => 11
+    }
+  end
+
+
+  def payout(user_score, dealer_score)
+    if dealer_score > 21 ||
+      (dealer_score < 21 && dealer_score < user_score && user_score < 21) ||
+      user_score == 21
+      self.bankroll += (self.bet * 2)
+    elsif dealer_score == user_score
+      self.bankroll += self.bet
+    end
+  end
+
+
+end
+
+
+class Dealer < Player
+
+  attr_accessor :hand
+
+  def initialize(hand)
+    @hand = hand
+    @scores = {
+      '2' => 2,
+      '3' => 3,
+      '4' => 4,
+      '5' => 5,
+      '6' => 6,
+      '7' => 7,
+      '8' => 8,
+      '9' => 9,
+      '10' => 10,
+      'J' => 10,
+      'Q' => 10,
+      'K' => 10,
+      'A' => 11
+    }
+  end
+
+  def partial_hand
+    [["HIDDEN"], self.hand.slice(1, self.hand.length).flatten]
+  end
+
+  def partial_hand_score(array)
+    array.shift
+    score = array.reduce(0) do |s, i|
+      s += @scores[i[0].to_s]
+    end
+  end
+
+
+end

views/betting_form.erb

@@ -0,0 +1,44 @@
+<nav class="navbar navbar-default">
+  <div class="container-fluid">
+    <div class="navbar-header">
+    <form class="navbar-form" action="/blackjack/bet" method="post">
+     <h1>Bankroll: $<%= @user.bankroll %> |  Bet: $</h1>
+     <div class="form-group">
+       <input type="text" class="form-control" name="bet" placeholder="$ Place your Bet">
+     </div>
+     <input type="submit" name="submit_bet" class="btn btn-primary" value="HIT ME!">
+   </form>
+ </div>
+</nav>
+
+<div class="container-fluid">
+  <% if @user.bet.to_i > @user.bankroll %>
+    <div class="alert alert-danger">
+      <strong>*** ERROR ***</strong>
+      <br>
+      You cannot bet more than you have in your bankroll!!!
+    </div>
+  <% elsif @bet_string =~ /\D/ || @bet_string =~ /[a-z]/i %>
+    <div class="alert alert-danger">
+      <strong>*** ERROR ***</strong>
+      <br>
+      Bets may contain only numbers
+    </div>
+  <% end %>
+</div>
+
+<div class="container-fluid">
+  <div class="row">
+    <div class="col-sm-6">
+      <h1>Dealer:</h1>
+      <h3><strong>Hand:</h3>
+      <h3><strong>Total Points:</h3>
+    </div>
+
+    <div class="col-sm-6">
+      <h1>Player:</h1>
+      <h3><strong>Hand:</h3>
+      <h3><strong>Total Points:</h3>
+    </div>
+  </div>
+</div>