naja/actions.py

   1 from naja.constants import ACTION_GLYPHS, BITS, CHESS_PIECES
   2 from naja.sound import sound
   3 from naja.utils import bit_glyphs, move_glyph
   4
   5
   6 class LocationAction(object):
   7     """
   8     An action that may be performed on a location.
   9     """
  10
  11     TEXT = None
  12     GLYPHS = tuple()
  13     MSB_GLYPH = None
  14
  15     def __init__(self, required_bits, **data):
  16         self.required_bits = required_bits
  17         self.data = data
  18
  19     def get_text(self, location=None):
  20         substitutions = self.data.copy()
  21
  22         if 'shift' in self.data:
  23             substitutions['shift'] = self.data['shift']
  24             substitutions['shift_glyph'] = ('{SHIFT_%s}'
  25                                             % self.data['direction'].upper())
  26         elif 'direction' in self.data:
  27             substitutions['rowcol'] = {
  28                 'NORTH': 'column',
  29                 'SOUTH': 'column',
  30                 'EAST': 'row',
  31                 'WEST': 'row',
  32             }[self.data['direction']]
  33             substitutions['direction'] = '{%s}' % (substitutions['direction'],)
  34
  35         if 'chesspiece' in self.data:
  36             substitutions['chesspiece_name'] = move_glyph(
  37                 self.data['chesspiece'])
  38
  39         if 'rot_direction' in self.data:
  40             substitutions['rot_direction_name'] = '{%s}' % (
  41                 substitutions['rot_direction'],)
  42
  43         if location is None:
  44             substitutions['location_bits'] = 'bits specified by this location'
  45         else:
  46             substitutions['location_bits'] = bit_glyphs(
  47                 location.bitwise_operand)
  48
  49         return self.TEXT % substitutions
  50
  51     def check_available(self, player):
  52         return player.bits.check_bits(self.required_bits)
  53
  54     def perform_action(self, board, location):
  55         raise NotImplementedError(
  56             "%s does not implement perform_action()." % (type(self).__name__,))
  57
  58     def check_and_clear_MSB(self, player):
  59         if player.bits.check_bit(BITS.MSB):
  60             player.bits.clear_bit(BITS.MSB)
  61             return True
  62         else:
  63             return False
  64
  65     def export(self):
  66         return {'required_bits': list(self.required_bits),
  67                 'data': self.data,
  68                 'action_class': self.__class__.__name__}
  69
  70
  71 class DoNothing(LocationAction):
  72     TEXT = "No effect."
  73     GLYPHS = (ACTION_GLYPHS.NOTHING,)
  74
  75     def perform_action(self, board, location):
  76         pass
  77
  78
  79 class LoseHealthOrMSB(LocationAction):
  80     TEXT = "Lose {HEALTH} or {MSB}."
  81     MSB_GLYPH = ACTION_GLYPHS.DAMAGE
  82
  83     def perform_action(self, board, location):
  84         if not self.check_and_clear_MSB(board.player):
  85             board.lose_health()
  86
  87
  88 class SetBits(LocationAction):
  89     TEXT = "Set %(location_bits)s."
  90     GLYPHS = (ACTION_GLYPHS.SET_BITS,)
  91
  92     def perform_action(self, board, location):
  93         board.player.bits.set_bits(location.bitwise_operand)
  94
  95
  96 class ToggleBits(LocationAction):
  97     TEXT = "Toggle %(location_bits)s."
  98     GLYPHS = (ACTION_GLYPHS.TOGGLE_BITS,)
  99
 100     def perform_action(self, board, location):
 101         board.player.bits.toggle_bits(location.bitwise_operand)
 102
 103
 104 class ShiftBits(LocationAction):
 105     TEXT = "Barrel-shift player bits %(shift_glyph)s %(shift)s."
 106     GLYPHS = (ACTION_GLYPHS.SHIFT_LEFT,)
 107
 108     def perform_action(self, board, location):
 109         shift = self.data['shift']
 110         if self.data['direction'] == 'left':
 111             board.player.bits.shift_bits_left(shift)
 112         else:
 113             board.player.bits.shift_bits_right(shift)
 114
 115
 116 class LoseHealthOrMSBAndSetBits(LocationAction):
 117     TEXT = "Lose {HEALTH} or {MSB}, then set %(location_bits)s."
 118     GLYPHS = (ACTION_GLYPHS.SET_BITS,)
 119     MSB_GLYPH = ACTION_GLYPHS.DAMAGE
 120
 121     def perform_action(self, board, location):
 122         if not self.check_and_clear_MSB(board.player):
 123             board.lose_health()
 124         board.player.bits.set_bits(location.bitwise_operand)
 125
 126
 127 class AcquireWinToken(LocationAction):
 128     TEXT = "Gain {WINTOKEN}, then clear {RED,GREEN,BLUE}."
 129     GLYPHS = (ACTION_GLYPHS.WINTOKEN,)
 130
 131     def perform_action(self, board, location):
 132         board.acquire_win_token()
 133         board.player.bits.clear_bits(set([
 134             BITS.RED, BITS.GREEN, BITS.BLUE,
 135         ]))
 136
 137
 138 class GainHealth(LocationAction):
 139     TEXT = "Gain {HEALTH}."
 140     GLYPHS = (ACTION_GLYPHS.HEAL,)
 141
 142     def perform_action(self, board, location):
 143         board.gain_health()
 144
 145
 146 class GainHealthAndClearBitsOrMSB(LocationAction):
 147     TEXT = "Gain {HEALTH}, then clear %(location_bits)s or {MSB}."
 148     GLYPHS = (ACTION_GLYPHS.HEAL,)
 149     MSB_GLYPH = ACTION_GLYPHS.CLEAR_BITS
 150
 151     def perform_action(self, board, location):
 152         board.gain_health()
 153         if not self.check_and_clear_MSB(board.player):
 154             board.player.bits.clear_bits(location.bitwise_operand)
 155
 156
 157 class ShiftLocations(LocationAction):
 158     TEXT = "Shift current %(rowcol)s %(direction)s."
 159     GLYPHS = (ACTION_GLYPHS.CHANGE_BOARD,)
 160
 161     def perform_action(self, board, location):
 162         sound.play_sound('grind.ogg')
 163         board.shift_locations(self.data['direction'])
 164
 165
 166 class RotateLocations(LocationAction):
 167     TEXT = "Rotate adjacent locations %(rot_direction_name)s."
 168     GLYPHS = (ACTION_GLYPHS.CHANGE_BOARD,)
 169
 170     def perform_action(self, board, location):
 171         sound.play_sound('grind.ogg')
 172         board.rotate_locations(self.data['rot_direction'])
 173
 174
 175 class AllowChessMove(LocationAction):
 176     TEXT = "Move like a %(chesspiece_name)s for one turn."
 177     GLYPHS = (ACTION_GLYPHS.MOVEMENT,)
 178
 179     def perform_action(self, board, location):
 180         if self.data['chesspiece'] in CHESS_PIECES:
 181             chesspiece = CHESS_PIECES[self.data['chesspiece']]
 182             board.allow_chess_move(chesspiece)