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Fix index error if no players are set

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This commit is contained in:
Alex Clink 2021-09-15 00:05:30 -04:00
parent 6fb1b76c65
commit 322249c6b3
1 changed files with 4 additions and 0 deletions
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4
src/lx_chess/game.cr
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@ -194,17 +194,21 @@ module LxChess
end
def can_castle_right?(piece)
return false if @players.empty?
player = piece.white? ? @players[0] : @players[1]
return false unless player.castle_right
return false unless index = piece.index
return false unless @board.border_right(index) >= 2
# TODO: figure out if castling crosses checks
@board[index + 1].nil? && @board[index + 2].nil?
end
def can_castle_left?(piece)
return false if @players.empty?
player = piece.white? ? @players[0] : @players[1]
return false unless player.castle_left
return false unless index = piece.index
return false unless @board.border_left(index) <= 2
# TODO: figure out if castling crosses checks
@board[index - 1].nil? && @board[index - 2].nil?
end