game_handler: Made player colour optional

Author: fremiller

zulip_bots/zulip_bots/game_handler.py

@@ -829,11 +829,17 @@ def handle_message(self, content: str, player_email: str) -> None:
                 self.broadcast('It\'s your turn')
             else:
                 user_turn_avatar = "!avatar({})".format(self.players[self.turn])
-                self.broadcast('{} It\'s **{}**\'s ({}) turn.'.format(
+                if self.gameAdapter.gameMessageHandler.get_player_color(self.turn) is None:
+                    self.broadcast('{} It\'s **{}**\'s turn.'.format(
                     user_turn_avatar,
                     self.gameAdapter.get_username_by_email(
-                        self.players[self.turn]),
-                    self.gameAdapter.gameMessageHandler.get_player_color(self.turn)))
+                        self.players[self.turn])))
+                else:
+                    self.broadcast('{} It\'s **{}**\'s ({}) turn.'.format(
+                        user_turn_avatar,
+                        self.gameAdapter.get_username_by_email(
+                            self.players[self.turn]),
+                        self.gameAdapter.gameMessageHandler.get_player_color(self.turn)))
 
     def broadcast(self, content: str) -> None:
         self.gameAdapter.broadcast(self.game_id, content)