Implement board flip functionality

README.md

@@ -47,7 +47,9 @@ while True:
     display.check_for_quit()
     display.update(valid_fen, game_board)
 
-display.terminate()
+    # board flip interface
+    if not game_board.flipped:
+        display.flip(game_board)
 
 ```
 

chessboard/board.py

@@ -36,6 +36,9 @@ def __init__(self, bg_color, display_surf):
         self.display_surf = display_surf
 
         self.piece_rect = []
+        self.current_fen = ''
+        self.flipped = False
+        self.fp = FenParser()
 
     def display_board(self):
         self.display_surf.fill(self.bg_color)
@@ -58,9 +61,14 @@ def draw_tiles(self):
                         self.display_surf.blit(Board.w_tile, Board.board_rect[i - 1][j - 1])
 
     def update_pieces(self, fen):
+        self.current_fen = fen
         self.display_board()
         self.draw_pieces(fen)
 
+    def flip(self):
+        self.flipped = not self.flipped
+        self.update_pieces(self.current_fen)
+
     def create_piece(self, color, piece_type, position):
         piece = Piece(color, piece_type, self.display_surf)
         piece.set_position(position)
@@ -91,10 +99,16 @@ def create_piece_for_side(self, board_piece, color, position):
             piece = self.create_piece(color, PieceType.ROOK, position)
             self.piece_rect.append(piece)
 
+    def parse_fen(self, fen):
+        return self.fp.parse(fen)
+
     def draw_pieces(self, fen):
         self.piece_rect = []
-        fp = FenParser(fen)
-        fen_board = fp.parse()
+        fen_board = self.fp.parse(fen)
+
+        if self.flipped:
+            fen_board.reverse()
+            fen_board = list(map(lambda x: x[::-1], fen_board))
 
         for i in range(len(fen_board)):
             for j in range(len(fen_board[i])):

chessboard/display.py

@@ -46,3 +46,11 @@ def update(fen, game_board):
 
     pygame.display.update()
     fps_clock.tick(FPS)
+
+
+def flip(game_board: Board):
+    check_for_quit()
+    game_board.flip()
+
+    pygame.display.update()
+    fps_clock.tick(FPS)

chessboard/fenparser.py

@@ -1,19 +1,11 @@
-"""
-    https://github.com/tlehman/fenparser
-"""
-
-
 import re
 from itertools import chain
 
 
 class FenParser():
-  def __init__(self, fen_str):
-    self.fen_str = fen_str
-
 
-  def parse(self):
-    ranks = self.fen_str.split(" ")[0].split("/")
+  def parse(self, fen_str):
+    ranks = fen_str.split(" ")[0].split("/")
     pieces_on_all_ranks = [self.parse_rank(rank) for rank in ranks]
     return pieces_on_all_ranks
 

setup.py

@@ -18,7 +18,7 @@
 EMAIL = '[email protected]'
 AUTHOR = 'Ahira Adefokun'
 REQUIRES_PYTHON = '>=3.6.0'
-VERSION = '0.3.1'
+VERSION = '0.4.0'
 
 # What packages are required for this module to be executed?
 REQUIRED = [