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Passed
Pull Request — master (#905)
by Dan
05:43
created

ChessGame::getBoardReversed()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 7
Code Lines 4

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 2
eloc 4
nc 2
nop 0
dl 0
loc 7
rs 10
c 0
b 0
f 0
1
<?php declare(strict_types=1);
2
/**
3
 * @author Page
4
 *
5
 */
6
class ChessGame {
7
	const GAMETYPE_STANDARD = 'Standard';
8
	const PLAYER_BLACK = 'Black';
9
	const PLAYER_WHITE = 'White';
10
	protected static $CACHE_CHESS_GAMES = array();
11
12
	private $db;
13
14
	private $chessGameID;
15
	private $gameID;
16
	private $startDate;
17
	private $endDate;
18
	private $winner;
19
	private $whiteID;
20
	private $blackID;
21
22
	private $hasMoved;
23
	private $board;
24
	private $moves;
25
26
	private $lastMove = null;
27
28
	public static function getNPCMoveGames($forceUpdate = false) {
29
		$db = new SmrMySqlDatabase();
30
		$db->query('SELECT chess_game_id
31
					FROM npc_logins
32
					JOIN account USING(login)
33
					JOIN chess_game ON account_id = black_id OR account_id = white_id
34
					WHERE end_time > ' . TIME . ' OR end_time IS NULL;');
35
		$games = array();
36
		while ($db->nextRecord()) {
37
			$game = self::getChessGame($db->getInt('chess_game_id'), $forceUpdate);
38
			if ($game->getCurrentTurnAccount()->isNPC()) {
39
				$games[] = $game;
40
			}
41
		}
42
		return $games;
43
	}
44
45
	public static function getOngoingPlayerGames(AbstractSmrPlayer $player) {
46
		$db = new SmrMySqlDatabase();
47
		$db->query('SELECT chess_game_id FROM chess_game WHERE game_id = ' . $db->escapeNumber($player->getGameID()) . ' AND (black_id = ' . $db->escapeNumber($player->getAccountID()) . ' OR white_id = ' . $db->escapeNumber($player->getAccountID()) . ') AND (end_time > ' . TIME . ' OR end_time IS NULL);');
48
		$games = array();
49
		while ($db->nextRecord()) {
50
			$games[] = self::getChessGame($db->getInt('chess_game_id'));
51
		}
52
		return $games;
53
	}
54
55
	public static function getAccountGames($accountID) {
56
		$db = new SmrMySqlDatabase();
57
		$db->query('SELECT chess_game_id FROM chess_game WHERE black_id = ' . $db->escapeNumber($accountID) . ' OR white_id = ' . $db->escapeNumber($accountID) . ';');
58
		$games = array();
59
		while ($db->nextRecord()) {
60
			$games[] = self::getChessGame($db->getInt('chess_game_id'));
61
		}
62
		return $games;
63
	}
64
65
	public static function getChessGame($chessGameID, $forceUpdate = false) {
66
		if ($forceUpdate || !isset(self::$CACHE_CHESS_GAMES[$chessGameID])) {
67
			self::$CACHE_CHESS_GAMES[$chessGameID] = new ChessGame($chessGameID);
68
		}
69
		return self::$CACHE_CHESS_GAMES[$chessGameID];
70
	}
71
72
	public function __construct($chessGameID) {
73
		$this->db = new SmrMySqlDatabase();
74
		$this->db->query('SELECT *
75
						FROM chess_game
76
						WHERE chess_game_id=' . $this->db->escapeNumber($chessGameID) . ' LIMIT 1;');
77
		if ($this->db->nextRecord()) {
78
			$this->chessGameID = $chessGameID;
79
			$this->gameID = $this->db->getInt('game_id');
80
			$this->startDate = $this->db->getInt('start_time');
81
			$this->endDate = $this->db->getInt('end_time');
82
			$this->whiteID = $this->db->getInt('white_id');
83
			$this->blackID = $this->db->getInt('black_id');
84
			$this->winner = $this->db->getInt('winner_id');
85
			$this->resetHasMoved();
86
		} else {
87
			throw new Exception('Chess game not found: ' . $chessGameID);
88
		}
89
	}
90
91
	public static function isValidCoord($x, $y, array &$board) {
92
		return $y < count($board) && $y >= 0 && $x < count($board[$y]) && $x >= 0;
93
	}
94
95
	public static function isPlayerChecked(array &$board, array &$hasMoved, $colour) {
96
		foreach ($board as &$row) {
97
			foreach ($row as &$p) {
98
				if ($p != null && $p->colour != $colour && $p->isAttacking($board, $hasMoved, true)) {
99
					return true;
100
				}
101
			}
102
		}
103
		return false;
104
	}
105
106
	private function resetHasMoved() {
107
		$this->hasMoved = array(
108
			self::PLAYER_WHITE => array(
109
				ChessPiece::KING => false,
110
				ChessPiece::ROOK => array(
111
					'Queen' => false,
112
					'King' => false
113
				)
114
			),
115
			self::PLAYER_BLACK => array(
116
				ChessPiece::KING => false,
117
				ChessPiece::ROOK => array(
118
					'Queen' => false,
119
					'King' => false
120
				)
121
			),
122
			ChessPiece::PAWN => array(-1, -1)
123
		);
124
	}
125
126
	public function rerunGame($debugInfo = false) {
127
		$db = new SmrMySqlDatabase();
128
		$db2 = new SmrMySqlDatabase();
129
130
		$db->query('UPDATE chess_game
131
					SET end_time = NULL, winner_id = 0
132
					WHERE chess_game_id=' . $this->db->escapeNumber($this->chessGameID) . ';');
133
		$db->query('DELETE FROM chess_game_pieces WHERE chess_game_id = ' . $this->db->escapeNumber($this->chessGameID) . ';');
134
		self::insertPieces($this->chessGameID, $this->getWhitePlayer(), $this->getBlackPlayer());
135
136
		$db->query('SELECT * FROM chess_game_moves WHERE chess_game_id = ' . $this->db->escapeNumber($this->chessGameID) . ' ORDER BY move_id;');
137
		$db2->query('DELETE FROM chess_game_moves WHERE chess_game_id = ' . $this->db->escapeNumber($this->chessGameID) . ';');
138
		$this->moves = array();
139
		$this->board = null;
140
		$this->endDate = null;
141
		$this->winner = null;
142
		$this->resetHasMoved();
143
144
		try {
145
			while ($db->nextRecord()) {
146
				if ($debugInfo === true) {
147
					echo 'x=', $db->getInt('start_x'), ', y=', $db->getInt('start_y'), ', endX=', $db->getInt('end_x'), ', endY=', $db->getInt('end_y'), ', forAccountID=', $db->getInt('move_id') % 2 == 1 ? $this->getWhiteID() : $this->getBlackID(), EOL;
148
				}
149
				if (0 != $this->tryMove($db->getInt('start_x'), $db->getInt('start_y'), $db->getInt('end_x'), $db->getInt('end_y'), $db->getInt('move_id') % 2 == 1 ? $this->getWhiteID() : $this->getBlackID())) {
0 ignored issues
show
Bug Best Practice introduced by
It seems like you are loosely comparing $this->tryMove($db->getI... : $this->getBlackID()) of type integer|null to 0; this is ambiguous as not only 0 == 0 is true, but null == 0 is true, too. Consider using a strict comparison ===.
Loading history...
Bug introduced by
The call to ChessGame::tryMove() has too few arguments starting with pawnPromotionPiece. ( Ignorable by Annotation )

If this is a false-positive, you can also ignore this issue in your code via the ignore-call  annotation

149
				if (0 != $this->/** @scrutinizer ignore-call */ tryMove($db->getInt('start_x'), $db->getInt('start_y'), $db->getInt('end_x'), $db->getInt('end_y'), $db->getInt('move_id') % 2 == 1 ? $this->getWhiteID() : $this->getBlackID())) {

This check compares calls to functions or methods with their respective definitions. If the call has less arguments than are defined, it raises an issue.

If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. Please note the @ignore annotation hint above.

Loading history...
150
					break;
151
				}
152
			}
153
		} catch (Exception $e) {
154
			if ($debugInfo === true) {
155
				echo $e->getMessage() . EOL . $e->getTraceAsString() . EOL;
156
			}
157
			// We probably tried an invalid move - move on.
158
		}
159
	}
160
161
	public function getBoard() {
162
		if ($this->board == null) {
163
			$this->db->query('SELECT * FROM chess_game_pieces WHERE chess_game_id=' . $this->db->escapeNumber($this->chessGameID) . ';');
164
			$pieces = array();
165
			while ($this->db->nextRecord()) {
166
				$accountID = $this->db->getInt('account_id');
167
				$pieces[] = new ChessPiece($this->chessGameID, $accountID, $this->getColourForAccountID($accountID), $this->db->getInt('piece_id'), $this->db->getInt('x'), $this->db->getInt('y'), $this->db->getInt('piece_no'));
168
			}
169
			$this->board = $this->parsePieces($pieces);
170
		}
171
		return $this->board;
172
	}
173
174
	/**
175
	 * Get the board from black's perspective
176
	 */
177
	public function getBoardReversed() : array {
178
		// Need to reverse both the rows and the files to rotate the board
179
		$board = array_reverse($this->getBoard(), true);
180
		foreach ($board as $key => $row) {
181
			$board[$key] = array_reverse($row, true);
182
		}
183
		return $board;
184
	}
185
186
	public function getLastMove() {
187
		$this->getMoves();
188
		return $this->lastMove;
189
	}
190
191
	public function getMoves() {
192
		if ($this->moves == null) {
193
			$this->db->query('SELECT * FROM chess_game_moves WHERE chess_game_id = ' . $this->db->escapeNumber($this->chessGameID) . ' ORDER BY move_id;');
194
			$this->moves = array();
195
			$mate = false;
196
			while ($this->db->nextRecord()) {
197
				$pieceTakenID = $this->db->getField('piece_taken') == null ? null : $this->db->getInt('piece_taken');
198
				$this->moves[] = $this->createMove($this->db->getInt('piece_id'), $this->db->getInt('start_x'), $this->db->getInt('start_y'), $this->db->getInt('end_x'), $this->db->getInt('end_y'), $pieceTakenID, $this->db->getField('checked'), $this->db->getInt('move_id') % 2 == 1 ? self::PLAYER_WHITE : self::PLAYER_BLACK, $this->db->getField('castling'), $this->db->getBoolean('en_passant'), $this->db->getInt('promote_piece_id'));
199
				$mate = $this->db->getField('checked') == 'MATE';
200
			}
201
			if (!$mate && $this->hasEnded()) {
202
				if ($this->getWinner() != 0) {
203
					$this->moves[] = ($this->getWinner() == $this->getWhiteID() ? 'Black' : 'White') . ' Resigned.';
204
				} elseif (count($this->moves) < 2) {
205
					$this->moves[] = 'Game Cancelled.';
206
				} else {
207
					$this->moves[] = 'Game Drawn.';
208
				}
209
			}
210
		}
211
		return $this->moves;
212
	}
213
214
	public function getFENString() {
215
		$fen = '';
216
		$board = $this->getBoard();
217
		$blanks = 0;
218
		for ($y = 0; $y < 8; $y++) {
219
			if ($y > 0) {
220
				$fen .= '/';
221
			}
222
			for ($x = 0; $x < 8; $x++) {
223
				if ($board[$y][$x] == null) {
224
					$blanks++;
225
				} else {
226
					if ($blanks > 0) {
227
						$fen .= $blanks;
228
						$blanks = 0;
229
					}
230
					$fen .= $board[$y][$x]->getPieceLetter();
231
				}
232
			}
233
			if ($blanks > 0) {
234
				$fen .= $blanks;
235
				$blanks = 0;
236
			}
237
		}
238
		switch ($this->getCurrentTurnColour()) {
239
			case self::PLAYER_WHITE:
240
				$fen .= ' w ';
241
			break;
242
			case self::PLAYER_BLACK:
243
				$fen .= ' b ';
244
			break;
245
		}
246
247
		// Castling
248
		$castling = '';
249
		if ($this->hasMoved[self::PLAYER_WHITE][ChessPiece::KING] !== true) {
250
			if ($this->hasMoved[self::PLAYER_WHITE][ChessPiece::ROOK]['King'] !== true) {
251
				$castling .= 'K';
252
			}
253
			if ($this->hasMoved[self::PLAYER_WHITE][ChessPiece::ROOK]['Queen'] !== true) {
254
				$castling .= 'Q';
255
			}
256
		}
257
		if ($this->hasMoved[self::PLAYER_BLACK][ChessPiece::KING] !== true) {
258
			if ($this->hasMoved[self::PLAYER_BLACK][ChessPiece::ROOK]['King'] !== true) {
259
				$castling .= 'k';
260
			}
261
			if ($this->hasMoved[self::PLAYER_BLACK][ChessPiece::ROOK]['Queen'] !== true) {
262
				$castling .= 'q';
263
			}
264
		}
265
		if ($castling == '') {
266
			$castling = '-';
267
		}
268
		$fen .= $castling . ' ';
269
270
		if ($this->hasMoved[ChessPiece::PAWN][0] != -1) {
271
			$fen .= chr(ord('a') + $this->hasMoved[ChessPiece::PAWN][0]);
272
			switch ($this->hasMoved[ChessPiece::PAWN][1]) {
273
				case 3:
274
					$fen .= '6';
275
				break;
276
				case 4:
277
					$fen .= '3';
278
				break;
279
			}
280
		} else {
281
			$fen .= '-';
282
		}
283
		$fen .= ' 0 ' . floor(count($this->moves) / 2);
284
285
		return $fen;
286
	}
287
288
	private static function parsePieces(array $pieces) {
289
		$board = array();
290
		$row = array();
291
		for ($i = 0; $i < 8; $i++) {
292
			$row[] = null;
293
		}
294
		for ($i = 0; $i < 8; $i++) {
295
			$board[] = $row;
296
		}
297
		foreach ($pieces as $piece) {
298
			if ($board[$piece->getY()][$piece->getX()] != null) {
299
				throw new Exception('Two pieces found in the same tile.');
300
			}
301
			$board[$piece->getY()][$piece->getX()] = $piece;
302
		}
303
		return $board;
304
	}
305
306
	public static function getStandardGame($chessGameID, AbstractSmrPlayer $whitePlayer, AbstractSmrPlayer $blackPlayer) {
307
		$white = $whitePlayer->getAccountID();
308
		$black = $blackPlayer->getAccountID();
309
		return array(
310
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::ROOK, 0, 0),
311
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::KNIGHT, 1, 0),
312
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::BISHOP, 2, 0),
313
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::QUEEN, 3, 0),
314
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::KING, 4, 0),
315
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::BISHOP, 5, 0),
316
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::KNIGHT, 6, 0),
317
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::ROOK, 7, 0),
318
319
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::PAWN, 0, 1),
320
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::PAWN, 1, 1),
321
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::PAWN, 2, 1),
322
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::PAWN, 3, 1),
323
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::PAWN, 4, 1),
324
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::PAWN, 5, 1),
325
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::PAWN, 6, 1),
326
				new ChessPiece($chessGameID, $black, self::PLAYER_BLACK, ChessPiece::PAWN, 7, 1),
327
328
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::PAWN, 0, 6),
329
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::PAWN, 1, 6),
330
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::PAWN, 2, 6),
331
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::PAWN, 3, 6),
332
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::PAWN, 4, 6),
333
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::PAWN, 5, 6),
334
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::PAWN, 6, 6),
335
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::PAWN, 7, 6),
336
337
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::ROOK, 0, 7),
338
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::KNIGHT, 1, 7),
339
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::BISHOP, 2, 7),
340
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::QUEEN, 3, 7),
341
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::KING, 4, 7),
342
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::BISHOP, 5, 7),
343
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::KNIGHT, 6, 7),
344
				new ChessPiece($chessGameID, $white, self::PLAYER_WHITE, ChessPiece::ROOK, 7, 7),
345
			);
346
	}
347
348
	public static function insertNewGame($startDate, $endDate, AbstractSmrPlayer $whitePlayer, AbstractSmrPlayer $blackPlayer) {
349
		if ($startDate == null) {
350
			throw new Exception('Start date cannot be null.');
351
		}
352
353
		$db = new SmrMySqlDatabase();
354
		$db->query('INSERT INTO chess_game' .
355
				'(start_time,end_time,white_id,black_id,game_id)' .
356
				'values' .
357
				'(' . $db->escapeNumber($startDate) . ',' . ($endDate == null ? 'NULL' : $db->escapeNumber($endDate)) . ',' . $db->escapeNumber($whitePlayer->getAccountID()) . ',' . $db->escapeNumber($blackPlayer->getAccountID()) . ',' . $db->escapeNumber($whitePlayer->getGameID()) . ');');
358
		$chessGameID = $db->getInsertID();
359
360
		self::insertPieces($chessGameID, $whitePlayer, $blackPlayer);
361
		return $chessGameID;
362
	}
363
364
	private static function insertPieces($chessGameID, AbstractSmrPlayer $whitePlayer, AbstractSmrPlayer $blackPlayer) {
365
		$db = new SmrMySqlDatabase();
366
		$pieces = self::getStandardGame($chessGameID, $whitePlayer, $blackPlayer);
367
		foreach ($pieces as $p) {
368
			$db->query('INSERT INTO chess_game_pieces' .
369
			'(chess_game_id,account_id,piece_id,x,y)' .
370
			'values' .
371
			'(' . $db->escapeNumber($chessGameID) . ',' . $db->escapeNumber($p->accountID) . ',' . $db->escapeNumber($p->pieceID) . ',' . $db->escapeNumber($p->getX()) . ',' . $db->escapeNumber($p->getY()) . ');');
372
		}
373
	}
374
375
	private function createMove($pieceID, $startX, $startY, $endX, $endY, $pieceTaken, $checking, $playerColour, $castling, $enPassant, $promotionPieceID) {
376
		// This move will be set as the most recent move
377
		$this->lastMove = [
378
			'From' => ['X' => $startX, 'Y' => $startY],
379
			'To'   => ['X' => $endX, 'Y' => $endY],
380
		];
381
382
		$otherPlayerColour = self::getOtherColour($playerColour);
383
		if ($pieceID == ChessPiece::KING) {
384
			$this->hasMoved[$playerColour][ChessPiece::KING] = true;
385
		}
386
		// Check if the piece moving is a rook and mark it as moved to stop castling.
387
		if ($pieceID == ChessPiece::ROOK && ($startX == 0 || $startX == 7) && ($startY == ($playerColour == self::PLAYER_WHITE ? 7 : 0))) {
388
			$this->hasMoved[$playerColour][ChessPiece::ROOK][$startX == 0 ? 'Queen' : 'King'] = true;
389
		}
390
		// Check if we've taken a rook and marked them as moved, if they've already moved this does nothing, but if they were taken before moving this stops an issue with trying to castle with a non-existent castle.
391
		if ($pieceTaken == ChessPiece::ROOK && ($endX == 0 || $endX == 7) && $endY == ($otherPlayerColour == self::PLAYER_WHITE ? 7 : 0)) {
392
			$this->hasMoved[$otherPlayerColour][ChessPiece::ROOK][$endX == 0 ? 'Queen' : 'King'] = true;
393
		}
394
		if ($pieceID == ChessPiece::PAWN && ($startY == 1 || $startY == 6) && ($endY == 3 || $endY == 4)) {
395
			$this->hasMoved[ChessPiece::PAWN] = array($endX, $endY);
396
		} else {
397
			$this->hasMoved[ChessPiece::PAWN] = array(-1, -1);
398
		}
399
		return ($castling == 'Queen' ? '0-0-0' : ($castling == 'King' ? '0-0' : ''))
400
			. ChessPiece::getSymbolForPiece($pieceID, $playerColour)
401
			. chr(ord('a') + $startX)
402
			. (8 - $startY)
403
			. ' '
404
			. ($pieceTaken == null ? '' : ChessPiece::getSymbolForPiece($pieceTaken, $otherPlayerColour))
405
			. chr(ord('a') + $endX)
406
			. (8 - $endY)
407
			. ($promotionPieceID == null ? '' : ChessPiece::getSymbolForPiece($promotionPieceID, $playerColour))
408
			. ' '
409
			. ($checking == null ? '' : ($checking == 'CHECK' ? '+' : '++'))
410
			. ($enPassant ? ' e.p.' : '');
411
	}
412
413
	public function isCheckmated($colour) {
414
		$king = null;
415
		foreach ($this->board as $row) {
416
			foreach ($row as $piece) {
417
				if ($piece != null && $piece->pieceID == ChessPiece::KING && $piece->colour == $colour) {
418
					$king = $piece;
419
					break;
420
				}
421
			}
422
		}
423
		if ($king == null) {
424
			throw new Exception('Could not find the king: game id = ' . $this->chessGameID);
425
		}
426
		if (!self::isPlayerChecked($this->board, $this->getHasMoved(), $colour)) {
427
			return false;
428
		}
429
		foreach ($this->board as $row) {
430
			foreach ($row as $piece) {
431
				if ($piece != null && $piece->colour == $colour) {
432
					$moves = $piece->getPossibleMoves($this->board, $this->getHasMoved());
433
					//There are moves we can make, we are clearly not checkmated.
434
					if (count($moves) > 0) {
435
						return false;
436
					}
437
				}
438
			}
439
		}
440
		return true;
441
	}
442
443
	public static function isCastling($x, $toX) {
444
		$movement = $toX - $x;
445
		if (abs($movement) == 2) {
446
			//To the left.
447
			if ($movement == -2) {
448
				return array('Type' => 'Queen',
449
						'X' => 0,
450
						'ToX' => 3
451
					);
452
			} //To the right
453
			elseif ($movement == 2) {
454
				return array('Type' => 'King',
455
						'X' => 7,
456
						'ToX' => 5
457
					);
458
			}
459
		}
460
		return false;
461
	}
462
463
	public static function movePiece(array &$board, array &$hasMoved, $x, $y, $toX, $toY, $pawnPromotionPiece = ChessPiece::QUEEN) {
464
		if (!self::isValidCoord($x, $y, $board)) {
465
			throw new Exception('Invalid from coordinates, x=' . $x . ', y=' . $y);
466
		}
467
		if (!self::isValidCoord($toX, $toY, $board)) {
468
			throw new Exception('Invalid to coordinates, x=' . $toX . ', y=' . $toY);
469
		}
470
		$pieceTaken = $board[$toY][$toX];
471
		$board[$toY][$toX] = $board[$y][$x];
472
		$p = $board[$toY][$toX];
473
		$board[$y][$x] = null;
474
		if ($p == null) {
475
			throw new Exception('Trying to move non-existent piece: ' . var_export($board, true));
476
		}
477
		$p->setX($toX);
478
		$p->setY($toY);
479
480
		$oldPawnMovement = $hasMoved[ChessPiece::PAWN];
481
		$nextPawnMovement = array(-1, -1);
482
		$castling = false;
483
		$enPassant = false;
484
		$rookMoved = false;
485
		$rookTaken = false;
486
		$pawnPromotion = false;
487
		if ($p->pieceID == ChessPiece::KING) {
488
			//Castling?
489
			$castling = self::isCastling($x, $toX);
490
			if ($castling !== false) {
491
				$hasMoved[$p->colour][ChessPiece::KING] = true;
492
				$hasMoved[$p->colour][ChessPiece::ROOK][$castling['Type']] = true;
493
				if ($board[$y][$castling['X']] == null) {
494
					throw new Exception('Cannot castle with non-existent castle.');
495
				}
496
				$board[$toY][$castling['ToX']] = $board[$y][$castling['X']];
497
				$board[$toY][$castling['ToX']]->setX($castling['ToX']);
498
				$board[$y][$castling['X']] = null;
499
			}
500
		} elseif ($p->pieceID == ChessPiece::PAWN) {
501
			if ($toY == 0 || $toY == 7) {
502
				$pawnPromotion = $p->promote($pawnPromotionPiece, $board);
503
			}
504
			//Double move to track?
505
			elseif (($y == 1 || $y == 6) && ($toY == 3 || $toY == 4)) {
506
				$nextPawnMovement = array($toX, $toY);
507
			}
508
			//En passant?
509
			elseif ($hasMoved[ChessPiece::PAWN][0] == $toX &&
510
					($hasMoved[ChessPiece::PAWN][1] == 3 && $toY == 2 || $hasMoved[ChessPiece::PAWN][1] == 4 && $toY == 5)) {
511
				$enPassant = true;
512
				$pieceTaken = $board[$hasMoved[ChessPiece::PAWN][1]][$hasMoved[ChessPiece::PAWN][0]];
513
				if ($board[$hasMoved[ChessPiece::PAWN][1]][$hasMoved[ChessPiece::PAWN][0]] == null) {
514
					throw new Exception('Cannot en passant a non-existent pawn.');
515
				}
516
				$board[$hasMoved[ChessPiece::PAWN][1]][$hasMoved[ChessPiece::PAWN][0]] = null;
517
			}
518
		} elseif ($p->pieceID == ChessPiece::ROOK && ($x == 0 || $x == 7) && $y == ($p->colour == self::PLAYER_WHITE ? 7 : 0)) {
519
			//Rook moved?
520
			if ($hasMoved[$p->colour][ChessPiece::ROOK][$x == 0 ? 'Queen' : 'King'] === false) {
521
				// We set rook moved in here as it's used for move info.
522
				$rookMoved = $x == 0 ? 'Queen' : 'King';
523
				$hasMoved[$p->colour][ChessPiece::ROOK][$rookMoved] = true;
524
			}
525
		}
526
		// Check if we've taken a rook and marked them as moved, if they've already moved this does nothing, but if they were taken before moving this stops an issue with trying to castle with a non-existent castle.
527
		if ($pieceTaken != null && $pieceTaken->pieceID == ChessPiece::ROOK && ($toX == 0 || $toX == 7) && $toY == ($pieceTaken->colour == self::PLAYER_WHITE ? 7 : 0)) {
528
			if ($hasMoved[$pieceTaken->colour][ChessPiece::ROOK][$toX == 0 ? 'Queen' : 'King'] === false) {
529
				$rookTaken = $toX == 0 ? 'Queen' : 'King';
530
				$hasMoved[$pieceTaken->colour][ChessPiece::ROOK][$rookTaken] = true;
531
			}
532
		}
533
		
534
		$hasMoved[ChessPiece::PAWN] = $nextPawnMovement;
535
		return array('Castling' => $castling,
536
				'PieceTaken' => $pieceTaken,
537
				'EnPassant' => $enPassant,
538
				'RookMoved' => $rookMoved,
539
				'RookTaken' => $rookTaken,
540
				'OldPawnMovement' => $oldPawnMovement,
541
				'PawnPromotion' => $pawnPromotion
542
			);
543
	}
544
545
	public static function undoMovePiece(array &$board, array &$hasMoved, $x, $y, $toX, $toY, $moveInfo) {
546
		if (!self::isValidCoord($x, $y, $board)) {
547
			throw new Exception('Invalid from coordinates, x=' . $x . ', y=' . $y);
548
		}
549
		if (!self::isValidCoord($toX, $toY, $board)) {
550
			throw new Exception('Invalid to coordinates, x=' . $toX . ', y=' . $toY);
551
		}
552
		if ($board[$y][$x] != null) {
553
			throw new Exception('Undoing move onto another piece? x=' . $x . ', y=' . $y);
554
		}
555
		$board[$y][$x] = $board[$toY][$toX];
556
		$p = $board[$y][$x];
557
		if ($p == null) {
558
			throw new Exception('Trying to undo move of a non-existent piece: ' . var_export($board, true));
559
		}
560
		$board[$toY][$toX] = $moveInfo['PieceTaken'];
561
		$p->setX($x);
562
		$p->setY($y);
563
564
		$hasMoved[ChessPiece::PAWN] = $moveInfo['OldPawnMovement'];
565
		//Castling
566
		if ($p->pieceID == ChessPiece::KING) {
567
			$castling = self::isCastling($x, $toX);
568
			if ($castling !== false) {
569
				$hasMoved[$p->colour][ChessPiece::KING] = false;
570
				$hasMoved[$p->colour][ChessPiece::ROOK][$castling['Type']] = false;
571
				if ($board[$toY][$castling['ToX']] == null) {
572
					throw new Exception('Cannot undo castle with non-existent castle.');
573
				}
574
				$board[$y][$castling['X']] = $board[$toY][$castling['ToX']];
575
				$board[$y][$castling['X']]->setX($castling['X']);
576
				$board[$toY][$castling['ToX']] = null;
577
			}
578
		} elseif ($moveInfo['EnPassant'] === true) {
579
			$board[$toY][$toX] = null;
580
			$board[$hasMoved[ChessPiece::PAWN][1]][$hasMoved[ChessPiece::PAWN][0]] = $moveInfo['PieceTaken'];
581
		} elseif ($moveInfo['RookMoved'] !== false) {
582
			$hasMoved[$p->colour][ChessPiece::ROOK][$moveInfo['RookMoved']] = false;
583
		}
584
		if ($moveInfo['RookTaken'] !== false) {
585
			$hasMoved[$moveInfo['PieceTaken']->colour][ChessPiece::ROOK][$moveInfo['RookTaken']] = false;
586
		}
587
	}
588
589
	public function tryAlgebraicMove($move) {
590
		if (strlen($move) != 4 && strlen($move) != 5) {
591
			throw new Exception('Move of length "' . strlen($move) . '" is not valid, full move: ' . $move);
592
		}
593
		$aVal = ord('a');
594
		$hVal = ord('h');
595
		if (ord($move[0]) < $aVal || ord($move[2]) < $aVal
596
				|| ord($move[0]) > $hVal || ord($move[2]) > $hVal
597
				|| $move[1] < 1 || $move[3] < 1
598
				|| $move[1] > 8 || $move[3] > 8) {
599
			throw new Exception('Invalid move: ' . $move);
600
		}
601
		$x = ord($move[0]) - $aVal;
602
		$y = 8 - $move[1];
603
		$toX = ord($move[2]) - $aVal;
604
		$toY = 8 - $move[3];
605
		$pawnPromotionPiece = null;
606
		if (isset($move[4])) {
607
			$pawnPromotionPiece = ChessPiece::getPieceForLetter($move[4]);
608
		}
609
		return $this->tryMove($x, $y, $toX, $toY, $this->getCurrentTurnAccountID(), $pawnPromotionPiece);
610
	}
611
612
	public function tryMove($x, $y, $toX, $toY, $forAccountID, $pawnPromotionPiece) {
613
		if ($this->hasEnded()) {
614
			return 5;
615
		}
616
		if ($this->getCurrentTurnAccountID() != $forAccountID) {
617
			return 4;
618
		}
619
		$lastTurnPlayer = $this->getCurrentTurnPlayer();
620
		$this->getBoard();
621
		$p = $this->board[$y][$x];
622
		if ($p == null || $p->colour != $this->getColourForAccountID($forAccountID)) {
623
			return 2;
624
		}
625
626
		$moves = $p->getPossibleMoves($this->board, $this->getHasMoved(), $forAccountID);
627
		foreach ($moves as $move) {
628
			if ($move[0] == $toX && $move[1] == $toY) {
629
				$chessType = $this->isNPCGame() ? 'Chess (NPC)' : 'Chess';
630
				$currentPlayer = $this->getCurrentTurnPlayer();
631
632
				$moveInfo = ChessGame::movePiece($this->board, $this->getHasMoved(), $x, $y, $toX, $toY, $pawnPromotionPiece);
633
634
				//We have taken the move, we should refresh $p
635
				$p = $this->board[$toY][$toX];
636
637
				$pieceTakenID = null;
638
				if ($moveInfo['PieceTaken'] != null) {
639
					$pieceTakenID = $moveInfo['PieceTaken']->pieceID;
640
					if ($moveInfo['PieceTaken']->pieceID == ChessPiece::KING) {
641
						throw new Exception('King was taken.');
642
					}
643
				}
644
645
				$pieceID = $p->pieceID;
646
				$pieceNo = $p->pieceNo;
647
				$promotionPieceID = null;
648
				if ($moveInfo['PawnPromotion'] !== false) {
649
					$p->pieceID = $moveInfo['PawnPromotion']['PieceID'];
650
					$p->pieceNo = $moveInfo['PawnPromotion']['PieceNo'];
651
					$promotionPieceID = $p->pieceID;
652
				}
653
654
				$checking = null;
655
				if ($p->isAttacking($this->board, $this->getHasMoved(), true)) {
656
					$checking = 'CHECK';
657
				}
658
				if ($this->isCheckmated(self::getOtherColour($p->colour))) {
659
					$checking = 'MATE';
660
				}
661
662
				$castlingType = $moveInfo['Castling'] === false ? null : $moveInfo['Castling']['Type'];
663
664
				if ($this->moves != null) {
665
					$this->moves[] = $this->createMove($pieceID, $x, $y, $toX, $toY, $pieceTakenID, $checking, $this->getCurrentTurnColour(), $castlingType, $moveInfo['EnPassant'], $promotionPieceID);
666
				}
667
				if (self::isPlayerChecked($this->board, $this->getHasMoved(), $p->colour)) {
668
					return 3;
669
				}
670
671
				$otherPlayer = $this->getCurrentTurnPlayer();
672
				if ($moveInfo['PawnPromotion'] !== false) {
673
					$piecePromotedSymbol = $p->getPieceSymbol();
674
					$currentPlayer->increaseHOF(1, array($chessType, 'Moves', 'Own Pawns Promoted', 'Total'), HOF_PUBLIC);
675
					$otherPlayer->increaseHOF(1, array($chessType, 'Moves', 'Opponent Pawns Promoted', 'Total'), HOF_PUBLIC);
676
					$currentPlayer->increaseHOF(1, array($chessType, 'Moves', 'Own Pawns Promoted', $piecePromotedSymbol), HOF_PUBLIC);
677
					$otherPlayer->increaseHOF(1, array($chessType, 'Moves', 'Opponent Pawns Promoted', $piecePromotedSymbol), HOF_PUBLIC);
678
				}
679
680
				$this->db->query('INSERT INTO chess_game_moves
681
								(chess_game_id,piece_id,start_x,start_y,end_x,end_y,checked,piece_taken,castling,en_passant,promote_piece_id)
682
								VALUES
683
								(' . $this->db->escapeNumber($p->chessGameID) . ',' . $this->db->escapeNumber($pieceID) . ',' . $this->db->escapeNumber($x) . ',' . $this->db->escapeNumber($y) . ',' . $this->db->escapeNumber($toX) . ',' . $this->db->escapeNumber($toY) . ',' . $this->db->escapeString($checking, true, true) . ',' . ($moveInfo['PieceTaken'] == null ? 'NULL' : $this->db->escapeNumber($moveInfo['PieceTaken']->pieceID)) . ',' . $this->db->escapeString($castlingType, true, true) . ',' . $this->db->escapeBoolean($moveInfo['EnPassant']) . ',' . ($moveInfo['PawnPromotion'] == false ? 'NULL' : $this->db->escapeNumber($moveInfo['PawnPromotion']['PieceID'])) . ');');
684
685
686
				$currentPlayer->increaseHOF(1, array($chessType, 'Moves', 'Total Taken'), HOF_PUBLIC);
687
				if ($moveInfo['PieceTaken'] != null) {
688
					$this->db->query('DELETE FROM chess_game_pieces
689
									WHERE chess_game_id=' . $this->db->escapeNumber($this->chessGameID) . ' AND account_id=' . $this->db->escapeNumber($moveInfo['PieceTaken']->accountID) . ' AND piece_id=' . $this->db->escapeNumber($moveInfo['PieceTaken']->pieceID) . ' AND piece_no=' . $this->db->escapeNumber($moveInfo['PieceTaken']->pieceNo) . ';');
690
691
					$pieceTakenSymbol = $moveInfo['PieceTaken']->getPieceSymbol();
692
					$currentPlayer->increaseHOF(1, array($chessType, 'Moves', 'Opponent Pieces Taken', 'Total'), HOF_PUBLIC);
693
					$otherPlayer->increaseHOF(1, array($chessType, 'Moves', 'Own Pieces Taken', 'Total'), HOF_PUBLIC);
694
					$currentPlayer->increaseHOF(1, array($chessType, 'Moves', 'Opponent Pieces Taken', $pieceTakenSymbol), HOF_PUBLIC);
695
					$otherPlayer->increaseHOF(1, array($chessType, 'Moves', 'Own Pieces Taken', $pieceTakenSymbol), HOF_PUBLIC);
696
				}
697
				$this->db->query('UPDATE chess_game_pieces
698
							SET x=' . $this->db->escapeNumber($toX) . ', y=' . $this->db->escapeNumber($toY) .
699
								($moveInfo['PawnPromotion'] !== false ? ', piece_id=' . $this->db->escapeNumber($moveInfo['PawnPromotion']['PieceID']) . ', piece_no=' . $this->db->escapeNumber($moveInfo['PawnPromotion']['PieceNo']) : '') . '
700
							WHERE chess_game_id=' . $this->db->escapeNumber($this->chessGameID) . ' AND account_id=' . $this->db->escapeNumber($p->accountID) . ' AND piece_id=' . $this->db->escapeNumber($pieceID) . ' AND piece_no=' . $this->db->escapeNumber($pieceNo) . ';');
701
				if ($moveInfo['Castling'] !== false) {
702
					$this->db->query('UPDATE chess_game_pieces
703
								SET x=' . $this->db->escapeNumber($moveInfo['Castling']['ToX']) . '
704
								WHERE chess_game_id=' . $this->db->escapeNumber($this->chessGameID) . ' AND account_id=' . $this->db->escapeNumber($p->accountID) . ' AND x = ' . $this->db->escapeNumber($moveInfo['Castling']['X']) . ' AND y = ' . $this->db->escapeNumber($y) . ';');
705
				}
706
				$return = 0;
707
				if ($checking == 'MATE') {
708
					$this->setWinner($forAccountID);
709
					$return = 1;
710
					SmrPlayer::sendMessageFromCasino($lastTurnPlayer->getGameID(), $this->getCurrentTurnAccountID(), 'You have just lost [chess=' . $this->getChessGameID() . '] against [player=' . $lastTurnPlayer->getPlayerID() . '].');
711
				} else {
712
					SmrPlayer::sendMessageFromCasino($lastTurnPlayer->getGameID(), $this->getCurrentTurnAccountID(), 'It is now your turn in [chess=' . $this->getChessGameID() . '] against [player=' . $lastTurnPlayer->getPlayerID() . '].');
713
					if ($checking == 'CHECK') {
714
						$currentPlayer->increaseHOF(1, array($chessType, 'Moves', 'Check Given'), HOF_PUBLIC);
715
						$otherPlayer->increaseHOF(1, array($chessType, 'Moves', 'Check Received'), HOF_PUBLIC);
716
					}
717
				}
718
				$currentPlayer->saveHOF();
719
				$otherPlayer->saveHOF();
720
				return $return;
721
			}
722
		}
723
	}
724
725
	public function getChessGameID() {
726
		return $this->chessGameID;
727
	}
728
729
	public function getStartDate() {
730
		return $this->startDate;
731
	}
732
733
	public function getGameID() {
734
		return $this->gameID;
735
	}
736
737
	public function getWhitePlayer() {
738
		return SmrPlayer::getPlayer($this->whiteID, $this->getGameID());
739
	}
740
741
	public function getWhiteID() {
742
		return $this->whiteID;
743
	}
744
745
	public function getBlackPlayer() {
746
		return SmrPlayer::getPlayer($this->blackID, $this->getGameID());
747
	}
748
749
	public function getBlackID() {
750
		return $this->blackID;
751
	}
752
753
	public function getColourID($colour) {
754
		if ($colour == self::PLAYER_WHITE) {
755
			return $this->getWhiteID();
756
		}
757
		if ($colour == self::PLAYER_BLACK) {
758
			return $this->getBlackID();
759
		}
760
	}
761
762
	public function getColourPlayer($colour) {
763
		return SmrPlayer::getPlayer($this->getColourID($colour), $this->getGameID());
764
	}
765
766
	public function getColourForAccountID($accountID) {
767
		if ($accountID == $this->getWhiteID()) {
768
			return self::PLAYER_WHITE;
769
		}
770
		if ($accountID == $this->getBlackID()) {
771
			return self::PLAYER_BLACK;
772
		}
773
		return false;
774
	}
775
776
	public function getEndDate() {
777
		return $this->endDate;
778
	}
779
780
	public function hasEnded() {
781
		return $this->endDate != 0 && $this->endDate <= TIME;
782
	}
783
784
	public function getWinner() {
785
		return $this->winner;
786
	}
787
788
	public function setWinner($accountID) {
789
		$this->winner = $accountID;
790
		$this->endDate = TIME;
791
		$this->db->query('UPDATE chess_game
792
						SET end_time=' . $this->db->escapeNumber(TIME) . ', winner_id=' . $this->db->escapeNumber($this->winner) . '
793
						WHERE chess_game_id=' . $this->db->escapeNumber($this->chessGameID) . ';');
794
		$winnerColour = $this->getColourForAccountID($accountID);
795
		$winningPlayer = $this->getColourPlayer($winnerColour);
796
		$losingPlayer = $this->getColourPlayer(self::getOtherColour($winnerColour));
797
		$chessType = $this->isNPCGame() ? 'Chess (NPC)' : 'Chess';
798
		$winningPlayer->increaseHOF(1, array($chessType, 'Games', 'Won'), HOF_PUBLIC);
799
		$losingPlayer->increaseHOF(1, array($chessType, 'Games', 'Lost'), HOF_PUBLIC);
800
		return array('Winner' => $winningPlayer, 'Loser' => $losingPlayer);
801
	}
802
803
	public function &getHasMoved() {
804
		return $this->hasMoved;
805
	}
806
807
	public function getCurrentTurnColour() {
808
		return count($this->getMoves()) % 2 == 0 ? self::PLAYER_WHITE : self::PLAYER_BLACK;
809
	}
810
811
	public function getCurrentTurnAccountID() {
812
		return count($this->getMoves()) % 2 == 0 ? $this->whiteID : $this->blackID;
813
	}
814
815
	public function getCurrentTurnPlayer() {
816
		return SmrPlayer::getPlayer($this->getCurrentTurnAccountID(), $this->getGameID());
817
	}
818
819
	public function getCurrentTurnAccount() {
820
		return SmrAccount::getAccount($this->getCurrentTurnAccountID());
821
	}
822
823
	public function getWhiteAccount() {
824
		return SmrAccount::getAccount($this->getWhiteID());
825
	}
826
827
	public function getBlackAccount() {
828
		return SmrAccount::getAccount($this->getBlackID());
829
	}
830
831
	public function isCurrentTurn($accountID) {
832
		return $accountID == $this->getCurrentTurnAccountID();
833
	}
834
835
	public function isNPCGame() {
836
		return $this->getWhiteAccount()->isNPC() || $this->getBlackAccount()->isNPC();
837
	}
838
839
	public static function getOtherColour($colour) {
840
		if ($colour == self::PLAYER_WHITE) {
841
			return self::PLAYER_BLACK;
842
		}
843
		if ($colour == self::PLAYER_BLACK) {
844
			return self::PLAYER_WHITE;
845
		}
846
		return false;
847
	}
848
849
	public function resign($accountID) {
850
		if ($this->hasEnded() || !$this->getColourForAccountID($accountID)) {
851
			return false;
852
		}
853
		// If only 1 person has moved then just end the game.
854
		if (count($this->getMoves()) < 2) {
855
			$this->endDate = TIME;
856
			$this->db->query('UPDATE chess_game
857
							SET end_time=' . $this->db->escapeNumber(TIME) . '
858
							WHERE chess_game_id=' . $this->db->escapeNumber($this->chessGameID) . ';');
859
			return 1;
860
		} else {
861
			$loserColour = $this->getColourForAccountID($accountID);
862
			$winnerAccountID = $this->getColourID(self::getOtherColour($loserColour));
863
			$results = $this->setWinner($winnerAccountID);
864
			$chessType = $this->isNPCGame() ? 'Chess (NPC)' : 'Chess';
865
			$results['Loser']->increaseHOF(1, array($chessType, 'Games', 'Resigned'), HOF_PUBLIC);
866
			SmrPlayer::sendMessageFromCasino($results['Winner']->getGameID(), $results['Winner']->getPlayerID(), '[player=' . $results['Loser']->getPlayerID() . '] just resigned against you in [chess=' . $this->getChessGameID() . '].');
867
			return 0;
868
		}
869
	}
870
871
	public function getPlayGameHREF() {
872
		return SmrSession::getNewHREF(create_container('skeleton.php', 'chess_play.php', array('ChessGameID' => $this->chessGameID)));
873
	}
874
875
	public function getResignHREF() {
876
		return SmrSession::getNewHREF(create_container('chess_resign_processing.php', '', array('ChessGameID' => $this->chessGameID)));
877
	}
878
}
879