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 = (ACTION_GLYPHS.NOTHING,)
  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 'rot_direction' in self.data:
  35             substitutions['rot_direction_name'] = '{%s}' % (
  36                 substitutions['rot_direction'],)
  37
  38         if location is None:
  39             substitutions['location_bits'] = 'bits specified by this location'
  40         else:
  41             substitutions['location_bits'] = bit_glyphs(
  42                 location.bitwise_operand)
  43
  44         return self.TEXT % substitutions
  45
  46     def check_available(self, player):
  47         return player.bits.check_bits(self.required_bits)
  48
  49     def perform_action(self, board, location):
  50         raise NotImplementedError(
  51             "%s does not implement perform_action()." % (type(self).__name__,))
  52
  53     def check_and_clear_MSB(self, player):
  54         if player.bits.check_bit(BITS.MSB):
  55             player.bits.clear_bit(BITS.MSB)
  56             return True
  57         else:
  58             return False
  59
  60     def export(self):
  61         return {'required_bits': list(self.required_bits),
  62                 'data': self.data,
  63                 'action_class': self.__class__.__name__}
  64
  65
  66 class DoNothing(LocationAction):
  67     TEXT = "No effect."
  68
  69     def perform_action(self, board, location):
  70         pass
  71
  72
  73 class LoseHealthOrMSB(LocationAction):
  74     TEXT = "Lose {HEALTH} or {MSB}."
  75     MSB_GLYPH = ACTION_GLYPHS.DAMAGE
  76
  77     def perform_action(self, board, location):
  78         if not self.check_and_clear_MSB(board.player):
  79             board.lose_health()
  80
  81
  82 class SetBits(LocationAction):
  83     TEXT = "Set %(location_bits)s."
  84     GLYPHS = (ACTION_GLYPHS.SET_BITS,)
  85
  86     def perform_action(self, board, location):
  87         board.player.bits.set_bits(location.bitwise_operand)
  88
  89
  90 class ToggleBits(LocationAction):
  91     TEXT = "Toggle %(location_bits)s."
  92     GLYPHS = (ACTION_GLYPHS.TOGGLE_BITS,)
  93
  94     def perform_action(self, board, location):
  95         board.player.bits.toggle_bits(location.bitwise_operand)
  96
  97
  98 class LoseHealthOrMSBAndSetBits(LocationAction):
  99     TEXT = "Lose {HEALTH} or {MSB}, then set %(location_bits)s."
 100     GLYPHS = (ACTION_GLYPHS.SET_BITS,)
 101     MSB_GLYPH = ACTION_GLYPHS.DAMAGE
 102
 103     def perform_action(self, board, location):
 104         if not self.check_and_clear_MSB(board.player):
 105             board.lose_health()
 106         board.player.bits.set_bits(location.bitwise_operand)
 107
 108
 109 class AcquireWinToken(LocationAction):
 110     TEXT = "Gain {WINTOKEN}, then clear {RED,GREEN,BLUE}."
 111     GLYPHS = (ACTION_GLYPHS.WINTOKEN,)
 112
 113     def perform_action(self, board, location):
 114         board.acquire_win_token()
 115         board.player.bits.clear_bits(set([
 116             BITS.RED, BITS.GREEN, BITS.BLUE,
 117         ]))
 118
 119
 120 class GainHealth(LocationAction):
 121     TEXT = "Gain {HEALTH}."
 122     GLYPHS = (ACTION_GLYPHS.HEAL,)
 123
 124     def perform_action(self, board, location):
 125         board.gain_health()
 126
 127
 128 class GainHealthAndClearBitsOrMSB(LocationAction):
 129     TEXT = "Gain {HEALTH}, then clear %(location_bits)s or {MSB}."
 130     GLYPHS = (ACTION_GLYPHS.HEAL,)
 131     MSB_GLYPH = ACTION_GLYPHS.CLEAR_BITS
 132
 133     def perform_action(self, board, location):
 134         board.gain_health()
 135         if not self.check_and_clear_MSB(board.player):
 136             board.player.bits.clear_bits(location.bitwise_operand)
 137
 138
 139 class ShiftLocations(LocationAction):
 140     TEXT = "Shift current %(rowcol)s %(direction)s."
 141     GLYPHS = (ACTION_GLYPHS.CHANGE_BOARD,)
 142
 143     def perform_action(self, board, location):
 144         board.shift_locations(self.data['direction'])
 145
 146
 147 class RotateLocations(LocationAction):
 148     TEXT = "Rotate adjacent locations %(rot_direction_name)s."
 149     GLYPHS = (ACTION_GLYPHS.CHANGE_BOARD,)
 150
 151     def perform_action(self, board, location):
 152         board.rotate_locations(self.data['rot_direction'])
 153
 154
 155 class AllowChessMove(LocationAction):
 156     TEXT = "Move like a %(chesspiece_name)s for one turn."
 157     GLYPHS = (ACTION_GLYPHS.MOVEMENT,)
 158
 159     def perform_action(self, board, location):
 160         if self.data['chesspiece'] in CHESS_PIECES:
 161             chesspiece = CHESS_PIECES[self.data['chesspiece']]
 162             board.allow_chess_move(chesspiece)