function doMove()
{
global $board, $isPromoting, $doUndo, $history, $numMoves;
/* old PHP versions don't have _POST, _GET and _SESSION as auto_globals */
if (!minimum_version("4.1.0")) {
global $_POST, $_GET, $_SESSION;
}
/* if moving en-passant */
/* (ie: if pawn moves diagonally without replacing anything) */
if (($board[$_POST['fromRow']][$_POST['fromCol']] & COLOR_MASK) == PAWN && $_POST['toCol'] != $_POST['fromCol'] && $board[$_POST['toRow']][$_POST['toCol']] == 0) {
/* delete eaten pawn */
$board[$_POST['fromRow']][$_POST['toCol']] = 0;
}
/* move piece to destination, replacing whatever's there */
$board[$_POST['toRow']][$_POST['toCol']] = $board[$_POST['fromRow']][$_POST['fromCol']];
/* delete piece from old position */
$board[$_POST['fromRow']][$_POST['fromCol']] = 0;
/* if not Undoing, but castling */
if ($doUndo != "yes" && ($board[$_POST['toRow']][$_POST['toCol']] & COLOR_MASK) == KING && $_POST['toCol'] - $_POST['fromCol'] == 2) {
/* castling to the right, move the right rook to the left side of the king */
$board[$_POST['toRow']][5] = $board[$_POST['toRow']][7];
/* delete rook from original position */
$board[$_POST['toRow']][7] = 0;
} elseif ($doUndo != "yes" && ($board[$_POST['toRow']][$_POST['toCol']] & COLOR_MASK) == KING && $_POST['fromCol'] - $_POST['toCol'] == 2) {
/* castling to the left, move the left rook to the right side of the king */
$board[$_POST['toRow']][3] = $board[$_POST['toRow']][0];
/* delete rook from original position */
$board[$_POST['toRow']][0] = 0;
}
return true;
}
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 */
}
}
function createNewGame($gameID)
{
global $CFG_TABLE;
/* clear history */
global $numMoves;
/* old PHP versions don't have _POST, _GET and _SESSION as auto_globals */
if (!minimum_version("4.1.0")) {
global $_POST, $_GET, $_SESSION;
}
$numMoves = -1;
mysql_query("DELETE FROM " . $CFG_TABLE[history] . " WHERE gameID = " . $_SESSION['gameID']);
initBoard();
}
function fixOldPHPVersions()
{
global $_fixOldPHPVersions;
if (isset($_fixOldPHPVersions)) {
return;
}
if (!minimum_version("4.1.0")) {
global $_POST, $_GET, $_SESSION;
$_POST = createNewHttpVars("POST");
$_GET = createNewHttpVars("GET");
//$_SESSION = createNewHttpVars("SESSION");
if (!isset($HTTP_SESSION_VARS["_SESSION"])) {
session_register("_SESSION");
}
}
$_fixOldPHPVersions = true;
}
$_SESSION['playerID'] = -1;
session_unregister($_SESSION);
echo "<script>window.location='index.php'</script>";
exit;
break;
case 'InvitePlayer':
/* prevent multiple pending requests between two players with the same originator */
#$tmpQuery = "SELECT gameID FROM games WHERE gameMessage = 'playerInvited'";
#$tmpQuery .= " AND ((messageFrom = 'white' AND whitePlayer = ".$_SESSION['playerID']." AND blackPlayer = ".$_POST['opponent'].")";
#$tmpQuery .= " OR (messageFrom = 'black' AND whitePlayer = ".$_POST['opponent']." AND blackPlayer = ".$_SESSION['playerID']."))";
$tmpQuery = "SELECT gameID FROM games WHERE (gameMessage = '' OR gameMessage='playerInvited')";
$tmpQuery .= "AND ((whitePlayer = " . $_SESSION['playerID'] . " AND blackPlayer= " . $_POST['opponent'] . ")";
$tmpQuery .= " OR (whitePlayer=" . $_POST['opponent'] . " AND blackPlayer=" . $_SESSION['playerID'] . "))";
$tmpExistingRequests = mysql_query($tmpQuery);
if (mysql_num_rows($tmpExistingRequests) == 0) {
if (!minimum_version("4.2.0")) {
init_srand();
}
if ($_POST['color'] == 'random') {
$tmpColor = rand(0, 1) == 1 ? "white" : "black";
} else {
$tmpColor = $_POST['color'];
}
$tmpQuery = "INSERT INTO games (whitePlayer, blackPlayer, gameMessage, messageFrom, dateCreated, lastMove, ratingWhite, ratingBlack,ratingWhiteM, ratingBlackM,oficial,PVBlack,PVWhite) VALUES (";
if ($tmpColor == 'white') {
$white = $_SESSION['playerID'];
$black = $_POST['opponent'];
} else {
$white = $_POST['opponent'];
$black = $_SESSION['playerID'];
}
function processMessages()
{
global $CFG_TABLE;
global $isUndoRequested, $isDrawRequested, $isUndoing, $isGameOver, $isCheckMate, $playersColor, $numMoves, $statusMessage, $CFG_USEEMAILNOTIFICATION;
/* old PHP versions don't have _POST, _GET and _SESSION as auto_globals */
if (!minimum_version("4.1.0")) {
global $_POST, $_GET, $_SESSION;
}
if (DEBUG) {
echo "Entering processMessages()<br>\n";
}
$isUndoRequested = false;
$isGameOver = false;
/* find out which player (black or white) we are serving */
/* NOTE: When playing in the same computer $playersColor is always the player who logged in first */
if (DEBUG) {
echo "SharedPC..." . $_SESSION['isSharedPC'] . "<br>\n";
}
if ($_SESSION['isSharedPC']) {
// Only the player to move is active in this case
if (($numMoves == -1 || $numMoves % 2 == 1) && $playersColor == "white" || $numMoves % 2 == 0 && $playersColor == "black") {
$currentPlayer = $playersColor;
} else {
// The player who logged in later is to move
if ($playersColor == "white") {
$currentPlayer = "black";
} else {
$currentPlayer = "white";
}
}
} else {
// The players are on different computers
$currentPlayer = $playersColor;
}
if ($currentPlayer == "white") {
$opponentColor = "black";
} else {
$opponentColor = "white";
}
/* *********************************************** */
/* queue user generated (ie: using forms) messages */
/* *********************************************** */
if (DEBUG) {
echo "Processing user generated (ie: form) messages...<br>\n";
}
/* queue a request for an undo */
if ($_POST['requestUndo'] == "yes") {
/* if the two players are on the same system, execute undo immediately */
/* NOTE: assumes the two players discussed it live before undoing */
if ($_SESSION['isSharedPC']) {
$isUndoing = true;
} else {
$tmpQuery = "INSERT INTO " . $CFG_TABLE[messages] . " (gameID, msgType, msgStatus, destination) VALUES (" . $_SESSION['gameID'] . ", 'undo', 'request', '" . $opponentColor . "')";
mysql_query($tmpQuery);
// ToDo: Mail an undo request notice to other player??
}
updateTimestamp();
}
/* queue a request for a draw */
if ($_POST['requestDraw'] == "yes") {
/* if the two players are on the same system, execute Draw immediately */
/* NOTE: assumes the two players discussed it live before declaring the game a draw */
if ($_SESSION['isSharedPC']) {
$tmpQuery = "UPDATE " . $CFG_TABLE[games] . " SET gameMessage = 'draw', messageFrom = '" . $currentPlayer . "' WHERE gameID = " . $_SESSION['gameID'];
mysql_query($tmpQuery);
} else {
$tmpQuery = "INSERT INTO " . $CFG_TABLE[messages] . " (gameID, msgType, msgStatus, destination) VALUES (" . $_SESSION['gameID'] . ", 'draw', 'request', '" . $opponentColor . "')";
mysql_query($tmpQuery);
}
updateTimestamp();
}
/* response to a request for an undo */
if (isset($_POST['undoResponse'])) {
if ($_POST['isUndoResponseDone'] == 'yes') {
if ($_POST['undoResponse'] == "yes") {
$tmpStatus = "approved";
$isUndoing = true;
} else {
$tmpStatus = "denied";
}
$tmpQuery = "UPDATE " . $CFG_TABLE[messages] . " SET msgStatus = '" . $tmpStatus . "', destination = '" . $opponentColor . "' WHERE gameID = " . $_SESSION['gameID'] . " AND msgType = 'undo' AND msgStatus = 'request' AND destination = '" . $currentPlayer . "'";
mysql_query($tmpQuery);
updateTimestamp();
}
}
/* response to a request for a draw */
if (isset($_POST['drawResponse'])) {
if ($_POST['isDrawResponseDone'] == 'yes') {
if ($_POST['drawResponse'] == "yes") {
$tmpStatus = "approved";
$tmpQuery = "UPDATE " . $CFG_TABLE[games] . " SET gameMessage = 'draw', messageFrom = '" . $currentPlayer . "' WHERE gameID = " . $_SESSION['gameID'];
mysql_query($tmpQuery);
} else {
$tmpStatus = "denied";
}
$tmpQuery = "UPDATE " . $CFG_TABLE[messages] . " SET msgStatus = '" . $tmpStatus . "', destination = '" . $opponentColor . "' WHERE gameID = " . $_SESSION['gameID'] . " AND msgType = 'draw' AND msgStatus = 'request' AND destination = '" . $currentPlayer . "'";
mysql_query($tmpQuery);
updateTimestamp();
}
}
/* resign the game */
if ($_POST['resign'] == "yes") {
$tmpQuery = "UPDATE " . $CFG_TABLE[games] . " SET gameMessage = 'playerResigned', messageFrom = '" . $currentPlayer . "' WHERE gameID = " . $_SESSION['gameID'];
mysql_query($tmpQuery);
updateTimestamp();
/* if email notification is activated... */
if ($CFG_USEEMAILNOTIFICATION && !$_SESSION['isSharedPC']) {
/* get opponent's player ID */
if ($currentPlayer == 'white') {
$tmpOpponentID = mysql_query("SELECT blackPlayer FROM " . $CFG_TABLE[games] . " WHERE gameID = " . $_SESSION['gameID']);
} else {
$tmpOpponentID = mysql_query("SELECT whitePlayer FROM " . $CFG_TABLE[games] . " WHERE gameID = " . $_SESSION['gameID']);
}
$opponentID = mysql_result($tmpOpponentID, 0);
$tmpOpponentEmail = mysql_query("SELECT value FROM " . $CFG_TABLE[preferences] . " WHERE playerID = " . $opponentID . " AND preference = 'emailNotification'");
/* if opponent is using email notification... */
if (mysql_num_rows($tmpOpponentEmail) > 0) {
$opponentEmail = mysql_result($tmpOpponentEmail, 0);
if ($opponentEmail != '') {
/* notify opponent of resignation via email */
webchessMail('resignation', $opponentEmail, '', $_SESSION['nick'], $_SESSION['gameID']);
}
}
}
}
/* ******************************************* */
/* process queued messages (ie: from database) */
/* ******************************************* */
$tmpQuery = "SELECT * FROM " . $CFG_TABLE[messages] . " WHERE gameID = " . $_SESSION['gameID'] . " AND destination = '" . $currentPlayer . "'";
$tmpMessages = mysql_query($tmpQuery);
while ($tmpMessage = mysql_fetch_array($tmpMessages, MYSQL_ASSOC)) {
switch ($tmpMessage['msgType']) {
case 'undo':
switch ($tmpMessage['msgStatus']) {
case 'request':
$isUndoRequested = true;
break;
case 'approved':
$tmpQuery = "DELETE FROM " . $CFG_TABLE[messages] . " WHERE gameID = " . $_SESSION['gameID'] . " AND msgType = 'undo' AND msgStatus = 'approved' AND destination = '" . $currentPlayer . "'";
mysql_query($tmpQuery);
$statusMessage .= "Undo approved";
break;
case 'denied':
$isUndoing = false;
$tmpQuery = "DELETE FROM " . $CFG_TABLE[messages] . " WHERE gameID = " . $_SESSION['gameID'] . " AND msgType = 'undo' AND msgStatus = 'denied' AND destination = '" . $currentPlayer . "'";
mysql_query($tmpQuery);
$statusMessage .= "Undo denied";
break;
}
break;
case 'draw':
switch ($tmpMessage['msgStatus']) {
case 'request':
$isDrawRequested = true;
break;
case 'approved':
$tmpQuery = "DELETE FROM " . $CFG_TABLE[messages] . " WHERE gameID = " . $_SESSION['gameID'] . " AND msgType = 'draw' AND msgStatus = 'approved' AND destination = '" . $currentPlayer . "'";
mysql_query($tmpQuery);
$statusMessage .= "Draw approved";
break;
case 'denied':
$tmpQuery = "DELETE FROM " . $CFG_TABLE[messages] . " WHERE gameID = " . $_SESSION['gameID'] . " AND msgType = 'draw' AND msgStatus = 'denied' AND destination = '" . $currentPlayer . "'";
mysql_query($tmpQuery);
$statusMessage .= "Draw denied";
break;
}
break;
}
}
/* requests pending */
$tmpQuery = "SELECT * FROM " . $CFG_TABLE[messages] . " WHERE gameID = " . $_SESSION['gameID'] . " AND msgStatus = 'request' AND destination = '" . $opponentColor . "'";
$tmpMessages = mysql_query($tmpQuery);
while ($tmpMessage = mysql_fetch_array($tmpMessages, MYSQL_ASSOC)) {
switch ($tmpMessage['msgType']) {
case 'undo':
$statusMessage .= "Your undo request is pending";
break;
case 'draw':
$statusMessage .= "Your request for a draw is pending";
break;
}
}
/* game level status: draws, resignations and checkmate */
/* if checkmate, update games table */
if ($_POST['isCheckMate'] == 'true') {
mysql_query("UPDATE " . $CFG_TABLE[games] . " SET gameMessage = 'checkMate', messageFrom = '" . $currentPlayer . "' WHERE gameID = " . $_SESSION['gameID']);
}
// ToDo: Mail checkmate notification to opponent
$tmpQuery = "SELECT gameMessage, messageFrom FROM " . $CFG_TABLE[games] . " WHERE gameID = " . $_SESSION['gameID'];
$tmpMessages = mysql_query($tmpQuery);
$tmpMessage = mysql_fetch_array($tmpMessages, MYSQL_ASSOC);
if ($tmpMessage['gameMessage'] == "draw") {
$statusMessage .= "Game ended in a draw";
$isGameOver = true;
}
if ($tmpMessage['gameMessage'] == "playerResigned") {
$statusMessage .= $tmpMessage['messageFrom'] . " has resigned the game";
$isGameOver = true;
}
if ($tmpMessage['gameMessage'] == "checkMate") {
$statusMessage .= "Checkmate! " . $tmpMessage['messageFrom'] . " has won the game";
$isGameOver = true;
$isCheckMate = true;
}
}
function writeHistory()
{
global $numMoves;
/* old PHP versions don't have _POST, _GET and _SESSION as auto_globals */
if (!minimum_version("4.1.0")) {
global $_POST, $_GET, $_SESSION;
}
/* based on player's preferences, display the history */
$moves = array();
// Make sure that $moves is defined
switch ($_SESSION['pref_history']) {
case 'verbous':
$moves = writeVerbousHistory();
break;
case 'pgn':
$moves = writeHistoryPGN();
break;
}
$comma = '';
echo "var moves = [";
for ($i = 0; $i < count($moves); $i++) {
echo $comma;
if ($i % 4 == 0) {
// Four moves on each line
echo "\n";
}
echo "['" . $moves[$i][0] . "', '" . $moves[$i][1] . "']";
$comma = ', ';
}
echo "];\n";
}
function savePromotion()
{
global $db,$db_prefix, $history, $numMoves, $is_in_check;
/* old PHP versions don't have _POST, _GET and _SESSION as auto_globals */
if (!minimum_version("4.1.0"))
global $_POST, $_GET, $_SESSION;
if ($is_in_check)
{
$tmpIsInCheck = 1;
$history[$numMoves]['is_in_check'] = 1;
}
else
$tmpIsInCheck = 0;
$history[$numMoves]['promotedTo'] = getPieceName($_POST['promotion']);
$tmpQuery = "UPDATE {$db_prefix}history SET time_of)move=NOW(), promoted_to = '".getPieceName($_POST['promotion'])."', is_in_check = ".$tmpIsInCheck." WHERE game_id = '$game_id' AND timeOfMove = '".$history[$numMoves]['timeOfMove']."'";
mysql_query($tmpQuery);
updateTimestamp();
/* if email notification is activated and move does not result in a pawn's promotion... */
if ($CFG_USEEMAILNOTIFICATION)
{
if ($history[$numMoves]['replaced'] == null)
$tmpReplaced = '';
else
$tmpReplaced = $history[$numMoves]['replaced'];
/* get opponent's color */
if (($numMoves == -1) || ($numMoves % 2 == 1))
$oppColor = "black";
else
$oppColor = "white";
/* get opponent's player ID */
if ($oppColor == 'white')
$tmpOpponentID = mysql_query("SELECT white_player FROM games WHERE game_id = ".$_SESSION['game_id']);
else
$tmpOpponentID = mysql_query("SELECT black_player FROM games WHERE game_id = ".$_SESSION['game_id']);
$opponentID = mysql_result($tmpOpponentID, 0);
/* if opponent is using email notification... */
$tmpOpponentEmail = mysql_query("SELECT value FROM preferences WHERE playerID = ".$opponentID." AND preference = 'emailNotification'");
if (mysql_num_rows($tmpOpponentEmail) > 0)
{
$opponentEmail = mysql_result($tmpOpponentEmail, 0);
if ($opponentEmail != '')
{
/* get opponent's nick */
$tmpOpponentNick = mysql_query("SELECT firstName FROM {$db_prefix}players WHERE playerID = ".$_SESSION['playerID']);
$opponentNick = mysql_result($tmpOpponentNick, 0);
/* get opponent's prefered history type */
$tmpOpponentHistory = mysql_query("SELECT value FROM preferences WHERE playerID = ".$opponentID." AND preference = 'history'");
/* default to PGN */
if (mysql_num_rows($tmpOpponentHistory) > 0)
$opponentHistory = mysql_result($tmpOpponentHistory, 0);
else
$opponentHistory = 'pgn';
/* notify opponent of move via email */
if ($opponentHistory == 'pgn')
webchessMail('move', $opponentEmail, moveToPGNString($history[$numMoves]['cur_color'], $history[$numMoves]['curPiece'], $history[$numMoves]['from_row'], $history[$numMoves]['from_col'], $history[$numMoves]['to_row'], $history[$numMoves]['to_col'], $tmpReplaced, $history[$numMoves]['promotedTo'], $is_in_check), $opponentNick);
else
webchessMail('move', $opponentEmail, moveToVerbousString($history[$numMoves]['cur_color'], $history[$numMoves]['curPiece'], $history[$numMoves]['from_row'], $history[$numMoves]['from_col'], $history[$numMoves]['to_row'], $history[$numMoves]['to_col'], $tmpReplaced, $history[$numMoves]['promotedTo'], $is_in_check), $opponentNick);
}
}
}
}
