naja/actions.py

   1 from naja.constants import ACTION_GLYPHS, BITS, CHESS_PIECES
   2 from naja.utils import bit_glyphs, move_glyph
   3
   4
   5 class LocationAction(object):
   6     """
   7     An action that may be performed on a location.
   8     """
   9
  10     TEXT = None
  11     GLYPHS = ()
  12     MSB_GLYPH = None
  13
  14     def __init__(self, required_bits, **data):
  15         self.required_bits = required_bits
  16         self.data = data
  17
  18     def get_text(self, location=None):
  19         substitutions = self.data.copy()
  20
  21         if 'direction' in self.data:
  22             substitutions['rowcol'] = {
  23                 'NORTH': 'column',
  24                 'SOUTH': 'column',
  25                 'EAST': 'row',
  26                 'WEST': 'row',
  27             }[self.data['direction']]
  28             substitutions['direction'] = '{%s}' % (substitutions['direction'],)
  29
  30         if 'chesspiece' in self.data:
  31             substitutions['chesspiece_name'] = move_glyph(
  32                 self.data['chesspiece'])
  33
  34         if location is None:
  35             substitutions['location_bits'] = 'bits specified by this location'
  36         else:
  37             substitutions['location_bits'] = bit_glyphs(
  38                 location.bitwise_operand)
  39
  40         return self.TEXT % substitutions
  41
  42     def check_available(self, player):
  43         return player.bits.check_bits(self.required_bits)
  44
  45     def perform_action(self, board, location):
  46         raise NotImplementedError(
  47             "%s does not implement perform_action()." % (type(self).__name__,))
  48
  49     def check_and_clear_MSB(self, player):
  50         if player.bits.check_bit(BITS.MSB):
  51             player.bits.clear_bit(BITS.MSB)
  52             return True
  53         else:
  54             return False
  55
  56     def export(self):
  57         return {'required_bits': list(self.required_bits),
  58                 'data': self.data,
  59                 'action_class': self.__class__.__name__}
  60
  61
  62 class DoNothing(LocationAction):
  63     TEXT = "No effect."
  64     GLYPHS = (ACTION_GLYPHS.NOTHING,)
  65
  66     def perform_action(self, board, location):
  67         pass
  68
  69
  70 class LoseHealthOrMSB(LocationAction):
  71     TEXT = "Lose {HEALTH} or {MSB}."
  72     MSB_GLYPH = ACTION_GLYPHS.DAMAGE
  73
  74     def perform_action(self, board, location):
  75         if not self.check_and_clear_MSB(board.player):
  76             board.lose_health()
  77
  78
  79 class SetBits(LocationAction):
  80     TEXT = "Set %(location_bits)s."
  81     GLYPHS = (ACTION_GLYPHS.SET_BITS,)
  82
  83     def perform_action(self, board, location):
  84         board.player.bits.set_bits(location.bitwise_operand)
  85
  86
  87 class ToggleBits(LocationAction):
  88     TEXT = "Toggle %(location_bits)s."
  89     GLYPHS = (ACTION_GLYPHS.TOGGLE_BITS,)
  90
  91     def perform_action(self, board, location):
  92         board.player.bits.toggle_bits(location.bitwise_operand)
  93
  94
  95 class LoseHealthOrMSBAndSetBits(LocationAction):
  96     TEXT = "Lose {HEALTH} or {MSB}, then set %(location_bits)s."
  97     GLYPHS = (ACTION_GLYPHS.SET_BITS,)
  98     MSB_GLYPH = ACTION_GLYPHS.DAMAGE
  99
 100     def perform_action(self, board, location):
 101         if not self.check_and_clear_MSB(board.player):
 102             board.lose_health()
 103         board.player.bits.set_bits(location.bitwise_operand)
 104
 105
 106 class AcquireWinToken(LocationAction):
 107     TEXT = "Gain {WINTOKEN}, then clear {RED,GREEN,BLUE}."
 108     GLYPHS = (ACTION_GLYPHS.WINTOKEN,)
 109
 110     def perform_action(self, board, location):
 111         board.acquire_win_token()
 112         board.player.bits.clear_bits(set([
 113             BITS.RED, BITS.GREEN, BITS.BLUE,
 114         ]))
 115
 116
 117 class GainHealthAndClearBitsOrMSB(LocationAction):
 118     TEXT = "Gain {HEALTH}, then clear %(location_bits)s or {MSB}."
 119     GLYPHS = (ACTION_GLYPHS.HEAL,)
 120     MSB_GLYPH = ACTION_GLYPHS.CLEAR_BITS
 121
 122     def perform_action(self, board, location):
 123         board.gain_health()
 124         if not self.check_and_clear_MSB(board.player):
 125             board.player.bits.clear_bits(location.bitwise_operand)
 126
 127
 128 class ShiftLocations(LocationAction):
 129     TEXT = "Shift current %(rowcol)s %(direction)s."
 130     GLYPHS = (ACTION_GLYPHS.CHANGE_BOARD,)
 131
 132     def perform_action(self, board, location):
 133         board.shift_locations(self.data['direction'])
 134
 135
 136 class AllowChessMove(LocationAction):
 137     TEXT = "Move like a %(chesspiece_name)s for one turn."
 138     GLYPHS = (ACTION_GLYPHS.MOVEMENT,)
 139
 140     def perform_action(self, board, location):
 141         if self.data['chesspiece'] in CHESS_PIECES:
 142             chesspiece = CHESS_PIECES[self.data['chesspiece']]
 143             board.allow_chess_move(chesspiece)