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(board, history)
  10     @board = board
  11     @history = history
  12
  13     board.add_observer self
  14   end
  15
  16   def on_new_move(data)
  17     @history.add_move(data[:state], data[:move])
  18     @board.highlight(data[:move])
  19   end
  20
  21   def on_back
  22     state, move = @history.back
  23     @board.back(state.dup, move)
  24     @board.highlight(@history.move)
  25   rescue History::OutOfBound
  26     puts "error: first move"
  27   end
  28
  29   def on_forward
  30     state, move = @history.forward
  31     @board.forward(state.dup, move)
  32     @board.highlight(move)
  33   rescue History::OutOfBound
  34     puts "error: last move"
  35   end
  36 end