Class: GameEngine

Inherits:
Object
  • Object
show all
Includes:
MSG
Defined in:
lib/game_engine.rb

Constant Summary

Constants included from MSG

MSG::BYE_MSG, MSG::ONEPLAYER_TWOPLAYER, MSG::OPP_FOUND, MSG::PLAYER_TURN_MSG, MSG::PLAY_MSG, MSG::P_OR_Q_ERR_MSG, MSG::TIE_GAME_MSG, MSG::WAITING_MSG, MSG::WELCOME_MSG

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from MSG

#INPUT_ERR_MSG, #LOADER_MSG, #TIMES_UP_MSG, #VICTORY_MSG, #WAITING_FOR_PLYR_MSG

Constructor Details

#initialize ⇒ GameEngine

Returns a new instance of GameEngine.



16
17
18
19
20
21
22
 
# File 'lib/game_engine.rb', line 16

def initialize
  @player1 = Player.new(ENV["USER"], "X")
  @ai = Player.new("HAL", "O")
  @players = [@player1, @ai]
  @board = Board.new
  @current_player = @players[0]
end

Instance Attribute Details

#ai ⇒ Object (readonly)

Returns the value of attribute ai.



9
10
11
 
# File 'lib/game_engine.rb', line 9

def ai
  @ai
end

#board ⇒ Object (readonly)

Returns the value of attribute board.



9
10
11
 
# File 'lib/game_engine.rb', line 9

def board
  @board
end

#current_player ⇒ Object (readonly)

Returns the value of attribute current_player.



9
10
11
 
# File 'lib/game_engine.rb', line 9

def current_player
  @current_player
end

#piece_count ⇒ Object (readonly)

Returns the value of attribute piece_count.



9
10
11
 
# File 'lib/game_engine.rb', line 9

def piece_count
  @piece_count
end

#player1 ⇒ Object (readonly)

Returns the value of attribute player1.



9
10
11
 
# File 'lib/game_engine.rb', line 9

def player1
  @player1
end

#players ⇒ Object (readonly)

Returns the value of attribute players.



9
10
11
 
# File 'lib/game_engine.rb', line 9

def players
  @players
end

Instance Method Details

#drop_token(column, token) ⇒ Object 



92
93
94
 
# File 'lib/game_engine.rb', line 92

def drop_token(column, token)
  @board.drop_token(column, token)
end

#play_game ⇒ Object

Player has hit ‘p’



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
 
# File 'lib/game_engine.rb', line 24

def play_game  # Player has hit 'p'
  game_over = false
  until game_over
    puts @board.display
    # keep false until valid input => in-range, un-filled column
    turn_over = false
    plyr = whose_turn
    token_x, token_y = nil, nil # returned from #drop_token and passed to #win_condition
    # if human player
    if plyr == @player1
      # force user to enter valid input
      until turn_over
        # only runs once (right after opponent takes turn)
        puts PLAYER_TURN_MSG
        column = CLI.get_input
        if valid_input(column)
          token_x, token_y = drop_token(column, plyr.token)
          turn_over = true
        else
          # continue to run until HUMAN user enters valid input
          puts INPUT_ERR_MSG(column)
        end
      end
    else
      # computer's turn
      # TODO trash talk
      # keep false until computer picks unfilled column (idx always in-range)
      until turn_over
        column = Board::COLUMNS.sample
        if valid_input(column)
          token_x, token_y = drop_token(column, plyr.token)
          turn_over = true
        end
      end
    end
    if @board.check_win(token_x, token_y, plyr.token)
      puts @board.display
      puts VICTORY_MSG(plyr.name)
      game_over = true
    end
    if @board.board_full?
      puts @board.display
      puts TIE_GAME_MSG
      game_over = true
    end
  end
end

#valid_input(column) ⇒ Object 



72
73
74
75
76
77
78
79
 
# File 'lib/game_engine.rb', line 72

def valid_input(column)
  idx = @board.column_to_index(column)
  if Board::COLUMNS.include?(column) && @board.board[0][idx] == "."
    true
  else
    false
  end
end

#whose_turn ⇒ Object

returns player object and increments queue



82
83
84
85
86
87
88
89
90
 
# File 'lib/game_engine.rb', line 82

def whose_turn
  plyr = @current_player
  @current_player = if plyr == @players[0]
    @players[1]
  else
    @players[0]
  end
  plyr
end