/** public function get_move
* Returns the data for the given move index
*
* @param int optional move history index
* @param bool optional return as JSON string
* @return array or string previous turn
*/
public function get_move($index = null, $json = false)
{
call(__METHOD__);
call($index);
call($json);
if (is_null($index)) {
$index = count($this->_history) - 1;
}
$index = (int) $index;
$json = (bool) $json;
$turn = $this->_history[$index];
$board = expandFEN($turn['board']);
if (!empty($this->_history[$index - 1])) {
$board = expandFEN($this->_history[$index - 1]['board']);
}
if (!$turn['move']) {
if ($json) {
return 'false';
}
return false;
}
$move = array();
$move[0] = Pharaoh::target_to_index(substr($turn['move'], 0, 2));
if ('-' == $turn['move'][2]) {
$move[1] = $move[0][0];
$move[2] = $turn['move'][3];
} else {
$move[1] = Pharaoh::target_to_index(substr($turn['move'], 3, 2));
$move[2] = (int) (':' == $turn['move'][2]);
}
$move[3] = Pharaoh::get_piece_color($board[$move[0]]);
if ($json) {
return json_encode($move);
}
$move['from'] = $move[0];
$move['to'] = $move[1];
$move['extra'] = $move[2];
$move['color'] = $move[3];
return $move;
}
/** static public function is_valid_setup
* Tests the validity of the given setup
*
* @param string setup
* @return bool valid setup
*/
public static function is_valid_setup($setup)
{
call(__METHOD__);
call($setup);
// expand the board FEN
$xFEN = expandFEN($setup);
if (80 != strlen($xFEN)) {
throw new MyException(__METHOD__ . ': Incorrect board size');
}
// test for a pharaoh on both sides
if (!preg_match('/P/', $xFEN, $s_match) || !preg_match('/p/', $xFEN, $r_match)) {
throw new MyException(__METHOD__ . ': Missing one or both Pharaohs');
}
// make sure there's only one of each pharaoh
if (1 != count($s_match) || 1 != count($r_match)) {
throw new MyException(__METHOD__ . ': Too many of one or both Pharaohs');
}
// test for a sphynx on both sides (if any)
if (preg_match('/[EFJK]/i', $xFEN) && (!preg_match('/[EFJK]/', $xFEN, $s_match) || !preg_match('/[efjk]/', $xFEN, $r_match))) {
throw new MyException(__METHOD__ . ': Missing one or both Sphynxes');
}
// make sure there's only one of each sphynx
if (1 != count($s_match) || 1 != count($r_match)) {
throw new MyException(__METHOD__ . ': Too many of one or both Sphynxes');
}
// look for invalid characters
if (preg_match('/[^abcdefhijklmnoptvwxy0]/i', $xFEN)) {
throw new MyException(__METHOD__ . ': Invalid characters found in setup');
}
// test for pieces on incorrect colors
$not_silver = array(0, 10, 20, 30, 40, 50, 60, 70, 8, 78);
foreach ($not_silver as $i) {
if ('0' != $xFEN[$i] && 'silver' == Pharaoh::get_piece_color($xFEN[$i])) {
throw new MyException(__METHOD__ . ': Silver piece on red square at ' . $i);
}
}
$not_red = array(9, 19, 29, 39, 49, 59, 69, 79, 1, 71);
foreach ($not_red as $i) {
if ('0' != $xFEN[$i] && 'red' == Pharaoh::get_piece_color($xFEN[$i])) {
throw new MyException(__METHOD__ . ': Red piece on silver square at ' . $i);
}
}
return true;
}
