naja/actions.py

   1 from naja.constants import BITS, CHESS_PIECES
   2
   3
   4 class LocationAction(object):
   5     """
   6     An action that may be performed on a location.
   7     """
   8
   9     TEXT = None
  10     USES_MSB = False
  11
  12     def __init__(self, required_bits, **data):
  13         self.required_bits = required_bits
  14         self.data = data
  15
  16     def get_text(self):
  17         substitutions = self.data.copy()
  18
  19         if 'direction' in self.data:
  20             substitutions['rowcol'] = {
  21                 'NORTH': 'column',
  22                 'SOUTH': 'column',
  23                 'EAST': 'row',
  24                 'WEST': 'row',
  25             }[self.data['direction']]
  26
  27         if 'chesspiece' in self.data:
  28             substitutions['chesspiece_name'] = self.data['chesspiece'].lower()
  29
  30         return self.TEXT % substitutions
  31
  32     def check_available(self, player):
  33         return player.bits.check_bits(self.required_bits)
  34
  35     def perform_action(self, board, location):
  36         raise NotImplementedError("TODO")
  37
  38     def check_and_clear_MSB(self, player):
  39         if player.bits.check_bit(BITS.MSB):
  40             player.bits.clear_bit(BITS.MSB)
  41             return True
  42         else:
  43             return False
  44
  45     def export(self):
  46         return {'required_bits': list(self.required_bits),
  47                 'data': self.data,
  48                 'action_class': self.__class__.__name__}
  49
  50
  51 class DoNothing(LocationAction):
  52     TEXT = "No effect."
  53
  54     def perform_action(self, board, location):
  55         pass
  56
  57
  58 class LoseHealthOrMSB(LocationAction):
  59     TEXT = "Lose health or MSB."
  60     USES_MSB = True
  61
  62     def perform_action(self, board, location):
  63         if not self.check_and_clear_MSB(board.player):
  64             board.lose_health()
  65
  66
  67 class SetBits(LocationAction):
  68     TEXT = "Set bits specified by this location."
  69
  70     def perform_action(self, board, location):
  71         board.player.bits.set_bits(location.bitwise_operand)
  72
  73
  74 class ToggleBits(LocationAction):
  75     TEXT = "Toggle bits specified by this location."
  76
  77     def perform_action(self, board, location):
  78         board.player.bits.toggle_bits(location.bitwise_operand)
  79
  80
  81 class LoseHealthOrMSBAndSetBits(LocationAction):
  82     TEXT = "Lose health or MSB, then set bits specified by this location."
  83     USES_MSB = True
  84
  85     def perform_action(self, board, location):
  86         if not self.check_and_clear_MSB(board.player):
  87             board.lose_health()
  88         board.player.bits.set_bits(location.bitwise_operand)
  89
  90
  91 class AcquireWinToken(LocationAction):
  92     TEXT = "Acquire a win token, then clear all key bits."
  93
  94     def perform_action(self, board, location):
  95         board.acquire_win_token()
  96         board.player.bits.clear_bits(set([
  97             BITS.RED, BITS.GREEN, BITS.BLUE,
  98         ]))
  99
 100
 101 class GainHealthAndClearBitsOrMSB(LocationAction):
 102     TEXT = "Gain health, then clear bits specified by this location or MSB."
 103     USES_MSB = True
 104
 105     def perform_action(self, board, location):
 106         board.gain_health()
 107         if not self.check_and_clear_MSB(board.player):
 108             board.player.bits.clear_bits(location.bitwise_operand)
 109
 110
 111 class ShiftLocations(LocationAction):
 112     TEXT = "Shift current %(rowcol)s %(direction)s."
 113
 114     def perform_action(self, board, location):
 115         board.shift_locations(self.data['direction'])
 116
 117
 118 class AllowChessMove(LocationAction) :
 119     TEXT = "Move like a %(chesspiece_name)s for one turn."
 120
 121     def perform_action(self, board, location):
 122         if self.data['chesspiece'] in CHESS_PIECES:
 123             chesspiece = CHESS_PIECES[self.data['chesspiece']]
 124             board.allow_chess_move(chesspiece)