/**
* Dumps a single move to PGN notation
*
* @return string
**/
public function dumpMove(Game $game, Piece $piece, Square $from, Square $to, array $playerPossibleMoves, $killed, $isCastling, $isPromotion, $isEnPassant, array $options)
{
$board = $game->getBoard();
$pieceClass = $piece->getClass();
$fromKey = $from->getKey();
$toKey = $to->getKey();
if ($isCastling) {
if ($this->isCastleKingSide($piece, $to)) {
return 'O-O';
} else {
return 'O-O-O';
}
}
if ($isEnPassant) {
return $from->getFile() . 'x' . $to->getKey();
}
if ($isPromotion) {
return $to->getKey() . '=' . ('Knight' === $options['promotion'] ? 'N' : $options['promotion'][0]);
}
$pgnFromPiece = $pgnFromFile = $pgnFromRank = '';
if ('Pawn' != $pieceClass) {
$pgnFromPiece = $piece->getPgn();
$candidates = array();
foreach ($playerPossibleMoves as $_from => $_tos) {
if ($_from !== $fromKey && in_array($toKey, $_tos)) {
$_piece = $board->getPieceByKey($_from);
if ($_piece->getClass() === $pieceClass) {
$candidates[] = $_piece;
}
}
}
if (!empty($candidates)) {
$isAmbiguous = false;
foreach ($candidates as $candidate) {
if ($candidate->getSquare()->getFile() === $from->getFile()) {
$isAmbiguous = true;
break;
}
}
if (!$isAmbiguous) {
$pgnFromFile = $from->getFile();
} else {
$isAmbiguous = false;
foreach ($candidates as $candidate) {
if ($candidate->getSquare()->getRank() === $from->getRank()) {
$isAmbiguous = true;
break;
}
}
if (!$isAmbiguous) {
$pgnFromRank = $from->getRank();
} else {
$pgnFromFile = $from->getFile();
$pgnFromRank = $from->getRank();
}
}
}
}
if ($killed) {
$pgnCapture = 'x';
if ('Pawn' === $pieceClass) {
$pgnFromFile = $from->getFile();
}
} else {
$pgnCapture = '';
}
$pgnTo = $to->getKey();
$pgn = $pgnFromPiece . $pgnFromFile . $pgnFromRank . $pgnCapture . $pgnTo;
return $pgn;
}
protected function isCastleKingSide(King $king, Square $to)
{
if ($to->getPiece()) {
return $to->getX() > $king->getX();
} else {
return 7 === $to->getX();
}
}
public function is(Square $square)
{
return $this->key === $square->getKey();
}
/**
* Handle castling
**/
protected function castling(King $king, Square $to)
{
if (7 === $to->getX()) {
$rookSquare = $to->getSquareByRelativePos(1, 0);
$newRookSquare = $to->getSquareByRelativePos(-1, 0);
} else {
$rookSquare = $to->getSquareByRelativePos(-2, 0);
$newRookSquare = $to->getSquareByRelativePos(1, 0);
}
$rook = $rookSquare->getPiece();
$this->board->move($rook, $newRookSquare->getX(), $newRookSquare->getY());
$rook->setFirstMove($this->game->getTurns());
if ($this->stack) {
$this->stack->add(array('type' => 'castling', 'from' => $rookSquare->getKey(), 'to' => $newRookSquare->getKey()));
}
}
