function doUndo()
{
global $CFG_TABLE;
global $board, $numMoves;
/* old PHP versions don't have _POST, _GET and _SESSION as auto_globals */
if (!minimum_version("4.1.0")) {
global $_POST, $_GET, $_SESSION;
}
/* get the last move from the history */
/* NOTE: MySQL currently has no support for subqueries */
$tmpMaxTime = mysql_query("SELECT Max(timeOfMove) FROM " . $CFG_TABLE[history] . " WHERE gameID = " . $_SESSION['gameID']);
$maxTime = mysql_result($tmpMaxTime, 0);
$moves = mysql_query("SELECT * FROM " . $CFG_TABLE[history] . " WHERE gameID = " . $_SESSION['gameID'] . " AND timeOfMove = '{$maxTime}'");
/* if there actually is a move... */
if ($lastMove = mysql_fetch_array($moves, MYSQL_ASSOC)) {
/* if the last move was played by this player */
/* undo move */
$fromRow = $lastMove['fromRow'];
$fromCol = $lastMove['fromCol'];
$toRow = $lastMove['toRow'];
$toCol = $lastMove['toCol'];
$board[$fromRow][$fromCol] = getPieceCode($lastMove['curColor'], $lastMove['curPiece']);
$board[$toRow][$toCol] = 0;
/* check for en-passant */
/* if pawn moves diagonally without replacing a piece, it's en passant */
if ($lastMove['curPiece'] == "pawn" && $toCol != $fromCol && is_null($lastMove['replaced'])) {
if ($lastMove['curColor'] == "black") {
$board[$fromRow][$toCol] = getPieceCode("white", "pawn");
} else {
$board[$fromRow][$toCol] = getPieceCode("black", "pawn");
}
}
/* check for castling */
if (($board[$fromRow][$fromCol] & COLOR_MASK) == KING && abs($toCol - $fromCol) == 2) {
/* move rook back as well */
if ($toCol - $fromCol == 2) {
$board[$fromRow][7] = $board[$fromRow][5];
$board[$fromRow][5] = 0;
} else {
$board[$fromRow][0] = $board[$fromRow][3];
$board[$fromRow][3] = 0;
}
}
/* restore lost piece */
if (!is_null($lastMove['replaced'])) {
if ($lastMove['curColor'] == "black") {
$board[$toRow][$toCol] = getPieceCode("white", $lastMove['replaced']);
} else {
$board[$toRow][$toCol] = getPieceCode("black", $lastMove['replaced']);
}
}
/* remove last move from history */
$numMoves--;
mysql_query("DELETE FROM " . $CFG_TABLE[history] . " WHERE gameID = " . $_SESSION['gameID'] . " AND timeOfMove = '{$maxTime}'");
/* else */
/* output error message */
}
}
else if ($PLAY){
echo "$now # $JOGADOR_NAME ($playersColor) PLY: $PLY playing at game: ". $row['gameID']."\n";
for ($i = 0; $i < 8; $i++)
for ($j = 0; $j < 8; $j++)
$board[$i][$j] = ".";
for ($i = 0; $i < 8; $i++)
for ($j = 0; $j < 8; $j++)
$tboard[$i][$j] = 0;
$pieces = mysql_query("SELECT * FROM pieces WHERE gameID = ".$gameID);
while ($thisPiece = mysql_fetch_array($pieces, MYSQL_ASSOC))
{
$board[$thisPiece["row"]][$thisPiece["col"]] = getPieceFileCode($thisPiece["piece"]);
$tboard[$thisPiece["row"]][$thisPiece["col"]] = getPieceCode($thisPiece["color"], $thisPiece["piece"]);
if ($thisPiece["color"] == "white")
$board[$thisPiece["row"]][$thisPiece["col"]] = strtoupper($board[$thisPiece["row"]][$thisPiece["col"]]);
}
$nu2ch[0]='a';
$nu2ch[1]='b';
$nu2ch[2]='c';
$nu2ch[3]='d';
$nu2ch[4]='e';
$nu2ch[5]='f';
$nu2ch[6]='g';
$nu2ch[7]='h';
function loadGame()
{
global $CFG_TABLE;
global $board, $playersColor;
/* old PHP versions don't have _POST, _GET and _SESSION as auto_globals */
if (!minimum_version("4.1.0")) {
global $_POST, $_GET, $_SESSION;
}
/* clear board data */
for ($i = 0; $i < 8; $i++) {
for ($j = 0; $j < 8; $j++) {
$board[$i][$j] = 0;
}
}
/* get data from database */
$pieces = mysql_query("SELECT * FROM " . $CFG_TABLE[pieces] . " WHERE gameID = " . $_SESSION['gameID']);
/* setup board */
while ($thisPiece = mysql_fetch_array($pieces, MYSQL_ASSOC)) {
$board[$thisPiece["row"]][$thisPiece["col"]] = getPieceCode($thisPiece["color"], $thisPiece["piece"]);
}
/* get current player's color */
$tmpQuery = "SELECT whitePlayer, blackPlayer FROM " . $CFG_TABLE[games] . " WHERE gameID = " . $_SESSION['gameID'];
$tmpTurns = mysql_query($tmpQuery);
$tmpTurn = mysql_fetch_array($tmpTurns, MYSQL_ASSOC);
if ($tmpTurn['whitePlayer'] == $_SESSION['playerID']) {
$playersColor = "white";
} else {
$playersColor = "black";
}
}
function loadGame($game_id)
{
global $db,$db_prefix, $board, $playersColor, $MSG_LANG,$db_prefix,$db;
/* clear board data */
for ($i = 0; $i < 8; $i++)
{
for ($j = 0; $j < 8; $j++)
{
$board[$i][$j] = 0;
}
}
$pieces = mysql_query("SELECT * FROM {$db_prefix}pieces WHERE game_id = '$game_id'");
/* setup board */
while ($thisPiece = mysql_fetch_array($pieces, MYSQL_ASSOC))
{
$board[$thisPiece["row"]][$thisPiece["col"]] = getPieceCode($thisPiece["color"], $thisPiece["piece"]);
}
/* get current player's color */
$tmpQuery = "SELECT white_player, black_player FROM {$db_prefix}games WHERE game_id = '$game_id'";
$tmpTurns = mysql_query($tmpQuery);
$tmpTurn = mysql_fetch_array($tmpTurns, MYSQL_ASSOC);
if ($tmpTurn['white_player'] == $_SESSION['player_id'])
{
$playersColor = "white";
}
else
{
$playersColor = "black";
}
}
