X-Git-Url: https://git.ctpug.org.za/?a=blobdiff_plain;f=naja%2Fplayer.py;h=2aad55b029a4c323cd4582f42727496a0215d4d2;hb=3e460450c1baa9af43f5391ba4673a599071656b;hp=acae919c0c46c0b2d14338ca11d0c87289ab7df4;hpb=3757e52c05b60b636155a3205a579c118ae82cc1;p=naja.git

diff --git a/naja/player.py b/naja/player.py
index acae919..2aad55b 100644
--- a/naja/player.py
+++ b/naja/player.py
@@ -1,3 +1,4 @@
+from naja.constants import BITS, MOVES
 
 
 class PlayerBits(object):
@@ -33,18 +34,18 @@ class PlayerBits(object):
 
     # Operate on sets of bits
 
-    def check_bits(self, *bits):
+    def check_bits(self, bits):
         return all(self.check_bit(bit) for bit in bits)
 
-    def set_bits(self, *bits):
+    def set_bits(self, bits):
         for bit in bits:
             self.set_bit(bit)
 
-    def clear_bits(self, *bits):
+    def clear_bits(self, bits):
         for bit in bits:
             self.clear_bit(bit)
 
-    def toggle_bits(self, *bits):
+    def toggle_bits(self, bits):
         for bit in bits:
             self.toggle_bit(bit)
 
@@ -54,6 +55,100 @@ class Player(object):
     A representation of the player.
     """
 
-    def __init__(self, bits, position):
+    def __init__(self, bits, position, movement_mode=None):
         self.bits = PlayerBits(bits)
         self.position = position
+        self.movement_mode = movement_mode if movement_mode else MOVES.ADJACENT
+
+    @classmethod
+    def import_player(cls, definition):
+        return cls(
+            definition['bits'],
+            tuple(definition['position']),
+            definition['movement_mode'])
+
+    def export(self):
+        return {
+            'bits': self.bits.bits,
+            'position': list(self.position),
+            'movement_mode': self.movement_mode,
+        }
+
+    def get_adjacent_positions(self):
+        positions = [self.position]
+
+        x, y = self.position
+
+        if self.bits.check_bit(BITS.NORTH) and y > 0:
+            positions.append((x, y - 1))
+        if self.bits.check_bit(BITS.SOUTH) and y < 4:
+            positions.append((x, y + 1))
+        if self.bits.check_bit(BITS.EAST) and x < 4:
+            positions.append((x + 1, y))
+        if self.bits.check_bit(BITS.WEST) and x > 0:
+            positions.append((x - 1, y))
+
+        return positions
+
+    def get_knight_positions(self):
+        positions = set([self.position])
+
+        x, y = self.position
+
+        for a in (2, -2):
+            for b in (1, -1):
+                i, j = x + a, y + b
+                if 0 <= i < 5 and 0 <= j < 5:
+                    positions.add((i, j))
+
+                i, j = x + b, y + a
+                if 0 <= i < 5 and 0 <= j < 5:
+                    positions.add((i, j))
+
+        return sorted(list(positions))
+
+    def get_bishop_positions(self):
+        positions = set()
+
+        x, y = self.position
+
+        for i in range(5):
+            j = i + y - x
+            if 0 <= j < 5:
+                positions.add((i, j))
+
+            j = x + y - i
+            if 0 <= j < 5:
+                positions.add((i, j))
+
+        return sorted(list(positions))
+
+    def get_castle_positions(self):
+        positions = set()
+
+        x, y = self.position
+
+        for i in range(5):
+            positions.add((x, i))
+            positions.add((i, y))
+
+        return sorted(list(positions))
+
+    def set_position(self, new_position):
+        if new_position in self.legal_moves():
+            self.position = new_position
+            self.movement_mode = MOVES.ADJACENT
+            return True
+        return False
+
+    def legal_moves(self):
+        POSITION_FUNCTION = {
+            MOVES.ADJACENT: self.get_adjacent_positions,
+            MOVES.KNIGHT: self.get_knight_positions,
+            MOVES.BISHOP: self.get_bishop_positions,
+            MOVES.CASTLE: self.get_castle_positions,
+        }
+        return POSITION_FUNCTION[self.movement_mode]()
+
+    def allow_chess_move(self, chesspiece):
+        self.movement_mode = chesspiece