public function compile()
{
$this->pieces = array();
foreach (PieceFilter::filterAlive($this->getPieces()) as $piece) {
$this->pieces[$piece->getSquareKey()] = $piece;
}
}
/**
* @depends testGameCreation
*/
public function testFilterAlive(Entities\Game $game)
{
$piece1 = $game->getBoard()->getPieceByPos(1, 1);
$piece2 = $game->getBoard()->getPieceByPos(2, 1);
$piece2->setIsDead(true);
$this->assertSame(array($piece1), PieceFilter::filterAlive(array($piece1, $piece2)));
}
public function compile()
{
$this->pieces = array();
foreach (PieceFilter::filterAlive($this->getPieces()) as $piece) {
$this->pieces[$piece->getSquareKey()] = $piece;
}
foreach ($this->game->getPlayers() as $player) {
foreach ($player->getPieces() as $piece) {
$piece->setBoard($this);
}
}
}
protected function getLastPiece(Player $player)
{
$pieces = PieceFilter::filterNotClass(PieceFilter::filterAlive($player->getPieces()), 'King');
return empty($pieces) ? null : $pieces[0];
}
/**
* Transform a game to standard Forsyth Edwards Notation
* http://en.wikipedia.org/wiki/Forsyth%E2%80%93Edwards_Notation
*/
public static function export(Game $game, $positionOnly = false)
{
static $reverseClasses = array('Pawn' => 'p', 'Rook' => 'r', 'Knight' => 'n', 'Bishop' => 'b', 'Queen' => 'q', 'King' => 'k');
$board = $game->getBoard();
$emptySquare = 0;
$forsyth = '';
for ($y = 8; $y > 0; $y--) {
for ($x = 1; $x < 9; $x++) {
if ($piece = $board->getPieceByPosNoCheck($x, $y)) {
if ($emptySquare) {
$forsyth .= $emptySquare;
$emptySquare = 0;
}
$notation = $reverseClasses[$piece->getClass()];
if ('white' === $piece->getColor()) {
$notation = strtoupper($notation);
}
$forsyth .= $notation;
} else {
++$emptySquare;
}
}
if ($emptySquare) {
$forsyth .= $emptySquare;
$emptySquare = 0;
}
$forsyth .= '/';
}
$forsyth = trim($forsyth, '/');
if ($positionOnly) {
return $forsyth;
}
// b ou w to indicate turn
$forsyth .= ' ';
$forsyth .= substr($game->getTurnColor(), 0, 1);
// possibles castles
$forsyth .= ' ';
$hasCastle = false;
$analyser = new Analyser($board);
foreach ($game->getPlayers() as $player) {
if ($analyser->canCastleKingSide($player)) {
$hasCastle = true;
$forsyth .= $player->isWhite() ? 'K' : 'k';
}
if ($analyser->canCastleQueenSide($player)) {
$hasCastle = true;
$forsyth .= $player->isWhite() ? 'Q' : 'q';
}
}
if (!$hasCastle) {
$forsyth .= '-';
}
// en passant
$enPassant = '-';
foreach (PieceFilter::filterClass(PieceFilter::filterAlive($game->getPieces()), 'Pawn') as $piece) {
if ($piece->getFirstMove() === $game->getTurns() - 1) {
$color = $piece->getPlayer()->getColor();
$y = $piece->getY();
if ($color === 'white' && 4 === $y || $color === 'black' && 5 === $y) {
$enPassant = Board::posToKey($piece->getX(), 'white' === $color ? $y - 1 : $y + 1);
break;
}
}
}
$forsyth .= ' ' . $enPassant;
// Halfmove clock: This is the number of halfmoves since the last pawn advance or capture.
// This is used to determine if a draw can be claimed under the fifty-move rule.
$forsyth .= ' ' . $game->getHalfmoveClock();
// Fullmove number: The number of the full move. It starts at 1, and is incremented after Black's move.
$forsyth .= ' ' . $game->getFullMoveNumber();
return $forsyth;
}
/**
* Add castling moves if available
*
* @return array the squares where the king can go
**/
protected function addCastlingSquares(King $king, array $squares)
{
$player = $king->getPlayer();
$rooks = PieceFilter::filterNotMoved(PieceFilter::filterClass(PieceFilter::filterAlive($player->getPieces()), 'Rook'));
if (empty($rooks)) {
return $squares;
}
$opponentControlledKeys = $this->getPlayerControlledKeys($player->getOpponent(), true);
foreach ($rooks as $rook) {
$kingX = $king->getX();
$kingY = $king->getY();
$dx = $kingX > $rook->getX() ? -1 : 1;
$possible = true;
foreach (array($kingX + $dx, $kingX + 2 * $dx) as $_x) {
$key = Board::postoKey($_x, $kingY);
if ($this->board->hasPieceByKey($key) || in_array($key, $opponentControlledKeys)) {
$possible = false;
break;
}
}
if ($possible) {
if (-1 === $dx && $this->board->hasPieceByKey(Board::postoKey($kingX - 3, $kingY))) {
} else {
$squares[] = $this->board->getSquareByKey($key);
}
}
}
return $squares;
}
/**
* Add castling moves if available
*
* @return array the squares where the king can go
**/
protected function addCastlingSquares(King $king, array $squares)
{
$player = $king->getPlayer();
$rooks = PieceFilter::filterNotMoved(PieceFilter::filterClass(PieceFilter::filterAlive($player->getPieces()), 'Rook'));
if (empty($rooks)) {
return $squares;
}
$opponentControlledKeys = $this->getPlayerControlledKeys($player->getOpponent(), true);
foreach ($rooks as $rook) {
$kingX = $king->getX();
$kingY = $king->getY();
$rookX = $rook->getX();
$dx = $kingX > $rookX ? -1 : 1;
$newKingX = 1 === $dx ? 7 : 3;
$newRookX = 1 === $dx ? 6 : 4;
$possible = true;
// Unattacked
$rangeMin = min($kingX, $newKingX);
$rangeMax = min(8, max($kingX, $newKingX) + 1);
for ($_x = $rangeMin; $_x !== $rangeMax; $_x++) {
if (in_array(Board::posToKey($_x, $kingY), $opponentControlledKeys)) {
$possible = false;
break;
}
}
// Unimpeded
$rangeMin = min($kingX, $rookX, $newKingX, $newRookX);
$rangeMax = min(8, max($kingX, $rookX, $newKingX, $newRookX) + 1);
for ($_x = $rangeMin; $_x !== $rangeMax; $_x++) {
if ($piece = $this->board->getPieceByKey(Board::posToKey($_x, $kingY))) {
if ($piece !== $king && $piece !== $rook) {
$possible = false;
break;
}
}
}
if ($possible) {
// If King moves one square or less (Chess variant)
if (1 >= abs($kingX - $newKingX)) {
$newKingSquare = $rook->getSquare();
} else {
$newKingSquare = $this->board->getSquareByPos($newKingX, $kingY);
}
$squares[] = $newKingSquare;
}
}
return $squares;
}