/**
* @param MoveInterface $move
*
* @return string
*/
public static function toNotation(MoveInterface $move)
{
if (null === $move->getPiece()) {
return '';
}
$notation = '';
$piece = $move->getPiece();
$toLabel = strtolower($move->getToLabel());
$isPawn = $piece->getType() === PieceInterface::TYPE_PAWN;
$pieceLetter = PieceDecorator::toLetter($piece);
if (null !== ($capture = $move->getCapture())) {
if ($isPawn) {
$column = BoardHelper::getColumnFromPosition($move->getFrom());
$pieceLetter = BoardHelper::columnNumberToLetter($column);
}
$notation .= sprintf('%sx%s', $pieceLetter, $toLabel);
if ($isPawn) {
if ($move->getType() === MoveInterface::TYPE_CAPTURE_EN_PASSANT) {
$notation .= 'e.p.';
}
}
return $notation;
}
if ($isPawn) {
return $toLabel;
}
return sprintf('%s%s', $pieceLetter, $toLabel);
}
/**
* @param string $asciiBoard
*
* @return Board
*/
public static function fromAscii($asciiBoard)
{
$asciiBoard = trim($asciiBoard);
$squares = [];
$rows = array_map('trim', explode("\n", trim($asciiBoard)));
unset($rows[8]);
unset($rows[9]);
foreach ($rows as $x => $row) {
$rowNumber = 8 - $x;
$columns = array_map('trim', explode(' ', substr($row, 5)));
foreach ($columns as $y => $pieceAscii) {
$columnNumber = $y + 1;
if ($pieceAscii === '…') {
$piece = null;
} else {
$piece = PieceDecorator::fromAscii($pieceAscii);
}
$position = intval($columnNumber . $rowNumber);
$squares[] = new Square($position, $piece);
}
}
$board = BoardFactory::create($squares);
return $board;
}
/**
* @param string $notation
*
* @return string
*/
private function extractPieceType($notation)
{
if (strlen($notation) === 2) {
return PieceInterface::TYPE_PAWN;
}
if (strlen($notation) === 4 && ctype_lower(substr($notation, 0, 1)) === true) {
return PieceInterface::TYPE_PAWN;
}
$firstCharacter = substr($notation, 0, 1);
return PieceDecorator::getTypeFromLetter($firstCharacter);
}
