lib/controller.rb

   1 require 'observer_utils'
   2 require 'history'
   3
   4 class Controller
   5   include Observer
   6
   7   attr_reader :history
   8
   9   def initialize(elements, game, history)
  10     @board = elements[:board]
  11     @pools = elements[:pools]
  12
  13     @game = game
  14     @history = history
  15     @animator = @game.animator.new(@board)
  16     @field = AnimationField.new(20)
  17     @board.reset(history.state.board)
  18
  19     c = self
  20     @board.observe(:click) {|p| c.on_board_click(p) }
  21   end
  22
  23   def on_board_click(p)
  24     state = @history.state
  25     if @board.selection
  26       move = @game.policy.new_move(state, @board.selection, p)
  27       validate = @game.validator.new(state)
  28       if validate[move]
  29         perform! move
  30       end
  31
  32       @board.selection = nil
  33     elsif @game.policy.movable?(state, p) and movable?(p)
  34       @board.selection = p
  35     end
  36   end
  37
  38   def perform!(move)
  39     state = @history.state.dup
  40     state.perform! move
  41     @history.add_move(state, move)
  42
  43     @pools.each {|color, pool| pool.warp(state.pool(color)) }
  44     animate(:forward, state, move)
  45     @board.highlight(move)
  46   end
  47
  48   def back
  49     state, move = @history.back
  50     @pools.each {|color, pool| pool.warp(state.pool(color)) }
  51     animate(:back, state, move)
  52     @board.highlight(@history.move)
  53   rescue History::OutOfBound
  54     puts "error: first move"
  55   end
  56
  57   def forward
  58     state, move = @history.forward
  59     @pools.each {|color, pool| pool.warp(state.pool(color)) }
  60     animate(:forward, state, move)
  61     @board.highlight(move)
  62   rescue History::OutOfBound
  63     puts "error: last move"
  64   end
  65
  66   def animate(direction, state, move)
  67     anim = @animator.send(direction, state, move)
  68     @field.run anim
  69   end
  70
  71   def movable?(p)
  72     true
  73   end
  74 end