naja/gameboard.py

   1 from random import choice
   2
   3 from naja.constants import BITS, DIRECTION_BITS, CONDITION_BITS
   4 from naja.player import Player
   5 from naja import actions
   6
   7
   8 class GameBoard(object):
   9     """
  10     A representation of the game board.
  11     """
  12
  13     def __init__(self, state, player, board_locations):
  14         self.max_health = state['max_health']
  15         self.wins_required = state['wins_required']
  16         self.health = state['health']
  17         self.wins = state['wins']
  18         self.locations = self.import_locations(state['locations'])
  19         self.player = player
  20         self.board_locations = board_locations
  21
  22     @classmethod
  23     def new_game(cls, initial_bits, initial_pos, max_health, wins_required,
  24                  locations_definition):
  25         state = {
  26             'max_health': max_health,
  27             'health': max_health,
  28             'wins_required': wins_required,
  29             'wins': 0,
  30             'locations': locations_definition,
  31         }
  32         player = Player(initial_bits, initial_pos)
  33         board_locations = cls.generate_board(locations_definition)
  34         return cls(state, player, board_locations)
  35
  36     @classmethod
  37     def import_game(cls, definition):
  38         state = definition.copy()
  39         player = Player.import_player(state.pop('player'))
  40         board_locations = cls.import_board_locations(
  41             state.pop('board_locations'))
  42         return cls(state, player, board_locations)
  43
  44     def export(self):
  45         return {
  46             'max_health': self.max_health,
  47             'health': self.health,
  48             'wins_required': self.wins_required,
  49             'wins': self.wins,
  50             'locations': self.export_locations(),
  51             'player': self.player.export(),
  52             'board_locations': self.export_board_locations(),
  53         }
  54
  55     def export_locations(self):
  56         return [location.export() for location in self.locations]
  57
  58     @classmethod
  59     def import_locations(cls, locations_definition):
  60         return [
  61             LocationCard.import_location(definition)
  62             for definition in locations_definition]
  63
  64     def export_board_locations(self):
  65         return dict(
  66             (position, location.export())
  67             for position, location in self.board_locations)
  68
  69     @classmethod
  70     def import_board_locations(cls, board_locations_definition):
  71         return dict(
  72             (position, LocationCard.import_location(definition))
  73             for position, definition in board_locations_definition.iteritems())
  74
  75     @classmethod
  76     def generate_board(cls, locations_definition):
  77         # TODO: Choose some locations.
  78         return {}
  79
  80     def lose_health(self):
  81         self.health -= 1
  82         # TODO: Check win/lose
  83
  84
  85 class LocationCard(object):
  86     """
  87     A particular set of options available on a location.
  88     """
  89
  90     def __init__(self, bitwise_operand, location_actions):
  91         self.bitwise_operand = bitwise_operand
  92         self.actions = location_actions
  93
  94     @classmethod
  95     def import_location(cls, state):
  96         # TODO: Import real locations.
  97         location_actions = [
  98             cls.build_action(definition) for definition in state['actions']]
  99         return cls(state['bitwise_operand'], location_actions)
 100
 101     @classmethod
 102     def build_action(cls, definition):
 103         action_class = getattr(actions, definition['action_class'])
 104         required_bits = definition['required_bits']
 105         data = definition.get('data', {})
 106         return action_class(required_bits, **data)
 107
 108     @classmethod
 109     def new_location(cls, definition):
 110         return cls.import_location({
 111             'bitwise_operand': cls.generate_bitwise_operand(),
 112             'actions': definition['actions'],
 113         })
 114
 115     def export(self):
 116         return {
 117             'bitwise_operand': self.bitwise_operand,
 118             'actions': [action.export() for action in self.actions],
 119         }
 120
 121     @staticmethod
 122     def generate_bitwise_operand():
 123         """
 124         Generate a set of two or three bits. At least one direction and one
 125         condition bit will be included. There is a low probability of choosing
 126         a third bit from the complete set.
 127         """
 128         bits = set()
 129         bits.add(choice(DIRECTION_BITS.values()))
 130         bits.add(choice(CONDITION_BITS.values()))
 131         # One in three chance of adding a third bit, with a further one in four
 132         # chance that it will match a bit already chosen.
 133         if choice(range(3)) == 0:
 134             bits.add(choice(BITS.values()))
 135         return frozenset(bits)