gistfile1.coffee

# Without headers

class Game
 
  move: (el, sq) -> 
    key: @key sq
    removed: @at sq

    @remove removed if removed
    @elements[el.id] = el unless @elements[el.id]
    @sqs[key] = el
    
    delete @sqs[@key el.sq] if el.sq
    
    el.sq = sq
    removed

  remove: (el) ->
    delete @sqs[@key el.sq]
    delete @elements[el.id]
    el.sq = null
    @elements_removed[el.id] = el
    el

  moves: (from, side) ->
    from: or @sq
    side: or @side

    moves: []
    for move in @directions
      sq: [from[0],from[1]]

      while true
        to: [sq[0] + move[0], sq[1] + move[1]]

        break unless Chess.onBoard to

        piece_to: @chess.board.at to
        piece: @chess.board.at from 
        blank: piece_to?
        opponent_piece: piece_to and piece_to.side != side

        if blank or opponent_piece
          moves.push(new Move(from, to, side))
          sq = [to[0],to[1]] # clone
          break if opponent_piece
        else break

        break if @repeat == false
    moves


# with headers
class Game
 
  move: (el, sq) -> (removed)
    key: @key sq
    removed: @at sq

    @remove removed if removed
    @elements[el.id] = el unless @elements[el.id]
    @sqs[key] = el
    
    delete @sqs[@key el.sq] if el.sq
    
    el.sq = sq

  remove: (el) -> (el)
    delete @sqs[@key el.sq]
    delete @elements[el.id]
    el.sq = null
    @elements_removed[el.id] = el

  moves: (from, side) -> (moves)
    from: or @sq
    side: or @side

    moves: []
    for move in @directions
      sq: [from[0],from[1]]

      while true
        to: [sq[0] + move[0], sq[1] + move[1]]

        break unless Chess.onBoard to

        piece_to: @chess.board.at to
        piece: @chess.board.at from 
        blank: piece_to?
        opponent_piece: piece_to and piece_to.side != side

        if blank or opponent_piece
          moves.push(new Move(from, to, side))
          sq = [to[0],to[1]] # clone
          break if opponent_piece
        else break

        break if @repeat == false