Done

bin/tictactoe

@@ -1,3 +1,30 @@
 #!/usr/bin/env ruby
 
 require_relative '../config/environment'
+require 'pry'
+answer = "yes"
+while answer != "no"
+  puts "Welcome to Tic Tac Toe"
+  puts " are you looking for 0,1, or 2 players game?"
+  input =gets.strip.to_i
+  if input == 0
+    Game.new(Players::Computer.new("X"),Players::Computer.new("O"),Board.new).play
+  elsif input == 1
+      puts "please enter your token"
+      token=gets.strip
+      if token == "X"
+          Game.new(Players::Human.new("X"),Players::Computer.new("O"),Board.new).play
+      elsif token == "O"
+          Game.new(Players::Computer.new("X"),Players::Human.new("O"),Board.new).play
+      else
+          puts "invalid"
+      end
+  elsif input == 2
+    puts "X goes first"
+    Game.new(Players::Human.new("X"),Players::Human.new("O"),Board.new).play
+  else
+    puts "invalid"
+  end
+  puts "would you like to play again?"
+  answer=gets.strip
+end

lib/board.rb

@@ -0,0 +1,65 @@
+class Board
+  attr_accessor :cells
+  def initialize (cells=[" ", " ", " ", " ", " ", " ", " ", " ", " "])
+    @cells = cells
+  end
+  def reset!
+    @cells=[" ", " ", " ", " ", " ", " ", " ", " ", " "]
+  end
+  def display
+    puts " #{@cells[0]} | #{@cells[1]} | #{@cells[2]} "
+    puts "-----------"
+    puts " #{@cells[3]} | #{@cells[4]} | #{@cells[5]} "
+    puts "-----------"
+    puts " #{@cells[6]} | #{@cells[7]} | #{@cells[8]} "
+  end
+
+  def position(input)
+    if input.strip.match(/[0-9]/)
+      index=input.strip.to_i
+      if (index >>1 && index <<9)
+        @cells[index-1]
+      else
+        nil
+      end
+    end
+  end
+
+  def full?
+    false
+    @cells.all? do |position|
+      if position =="X"||position=="O"
+        true
+      end
+    end
+  end
+
+  def turn_count
+    [email protected] {|cell| cell == "X" || cell =="O"}
+    array.length
+  end
+
+  def taken?(input)
+    if (self.position(input) == " "||self.position(input)==""||self.position(input)==nil)
+      false
+    elsif (self.position(input)=="X"||self.position(input)=="O")
+      true
+    end
+  end
+
+  def valid_move?(input)
+    false
+    if input.match(/[0-9]/)
+      index=input.to_i
+      if index >> 1 && index << 9 && !self.taken?(input)
+        true
+      end
+    end
+  end
+  def update(input,player)
+    if valid_move?(input)
+      index=input.strip.to_i
+      @cells[index-1]="#{player.token}"
+    end
+  end
+end

lib/game.rb

@@ -0,0 +1,82 @@
+class Game
+  attr_accessor :player_1, :player_2, :board
+  def initialize (player_1=Players::Human.new("X"), player_2= Players::Human.new("O") , board=Board.new)
+    @player_1=player_1
+    @player_2=player_2
+    @board=board
+  end
+  WIN_COMBINATIONS =[
+        [0,1,2],
+        [3,4,5],
+        [6,7,8],
+        [0,3,6],
+        [1,4,7],
+        [2,5,8],
+        [0,4,8],
+        [2,4,6]
+            ]
+    def current_player
+      if @board.turn_count % 2==0
+          @player_1
+      else
+          @player_2
+      end
+    end
+
+    def won?
+
+         false
+         WIN_COMBINATIONS.any? do |win_combination|
+
+             if (@board.cells[win_combination[0]]=="X"||@board.cells[win_combination[0]]=="O") &&
+               @board.cells[win_combination[0]][email protected][win_combination[1]] &&
+               @board.cells[win_combination[0]][email protected][win_combination[2]]
+               return win_combination
+             end
+          end
+     end
+
+     def draw?
+         false
+       if @board.full? && !self.won?
+         true
+       end
+     end
+     def over?
+       false
+       if self.won?||self.draw?
+         true
+       end
+     end
+     def winner
+       nil
+       if self.won?
+            @board.cells[self.won?[0]]
+       end
+     end
+     def turn
+       input=self.current_player.move(@board)
+
+       until @board.valid_move?(input)
+         input=self.current_player.move(@board)
+       end
+       @board.update(input,current_player)
+       @board.display
+
+    end
+    def play
+      until self.over?
+        self.turn
+      end
+      if self.over?
+        if self.draw?
+          puts "Cat's Game!"
+        elsif self.won?
+
+          puts "Congratulations #{self.winner}!"
+        end
+      end
+    end
+
+
+end

lib/player.rb

@@ -0,0 +1,6 @@
+class Player
+  attr_reader :token
+  def initialize(token)
+    @token = token
+  end
+end

lib/players/computer.rb

@@ -0,0 +1,120 @@
+module Players
+  require 'pry'
+  class Computer < Player
+    attr_accessor :board
+    def move(board)
+
+      if board.valid_move?("5")
+          return  "5"
+      end
+      if board.cells[0] == board.cells[1]
+        if board.valid_move?("3")
+          return  "3"
+        end
+      end
+      if board.cells[0] == board.cells[2]
+        if board.valid_move?("2")
+          return "2"
+        end
+      end
+      if board.cells[1] == board.cells[2]
+        if board.valid_move?("1")
+          return   "1"
+        end
+      end
+      if board.cells[0] == board.cells[3]
+        if board.valid_move?("7")
+          return "7"
+        end
+      end
+      if board.cells[0] == board.cells[6]
+        if board.valid_move?("4")
+          return "4"
+        end
+      end
+      if board.cells[3] == board.cells[6]
+        if board.valid_move?("1")
+          return "1"
+        end
+      end
+      if board.cells[0] == board.cells[4]
+        if board.valid_move?("9")
+          return "9"
+        end
+      end
+      if board.cells[3] == board.cells[4]
+        if board.valid_move?("6")
+          return "6"
+        end
+      end
+      if board.cells[3] == board.cells[5]
+        if board.valid_move?("5")
+          return "5"
+        end
+      end
+      if board.cells[4] == board.cells[5]
+        if board.valid_move?("4")
+          return "4"
+        end
+      end
+      if board.cells[6] == board.cells[7]
+        if board.valid_move?("9")
+          return "9"
+        end
+      end
+      if board.cells[6] == board.cells[8]
+        if board.valid_move?("8")
+          return "8"
+        end
+      end
+      if board.cells[7] == board.cells[8]
+        if board.valid_move?("7")
+          return "7"
+        end
+      end
+      if board.cells[1] == board.cells[4]
+        if board.valid_move?("8")
+          return "8"
+        end
+      end
+      if board.cells[4] == board.cells[7]
+        if board.valid_move?("2")
+          return "2"
+        end
+      end
+      if board.cells[2] == board.cells[5]
+        if board.valid_move?("9")
+          return "9"
+        end
+      end
+      if board.cells[2] == board.cells[8]
+        if board.valid_move?("6")
+          return "6"
+        end
+      end
+      if board.cells[5] == board.cells[8]
+        if board.valid_move?("3")
+          return "3"
+        end
+      end
+      if board.cells[2] == board.cells[4]
+        if board.valid_move?("7")
+          return "7"
+        end
+      end
+      if board.cells[4] == board.cells[6]
+        if board.valid_move?("3")
+          return "3"
+        end
+      end
+      i=1
+      while i<< 9
+          if board.valid_move?("#{i}")
+            return "#{i}"
+          else
+            i=i+1
+          end
+      end
+    end
+  end
+end

lib/players/human.rb

@@ -0,0 +1,9 @@
+module Players
+  class Human < Player
+    attr_accessor :board
+    def move(board)
+      puts "please enter 1-9 for your move"
+      gets.strip
+    end
+  end
+end