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<?php declare(strict_types=1); |
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if (!defined('USING_AJAX')) { |
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define('USING_AJAX', false); |
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} |
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class SmrSession { |
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const TIME_BEFORE_EXPIRY = 3600; |
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private const URL_LOAD_DELAY = array( |
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'configure_hardware.php' => .4, |
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'forces_drop.php' => .4, |
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'forces_drop_processing.php' => .5, |
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'forces_refresh_processing.php' => .4, |
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'sector_jump_processing.php' => .4, |
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'sector_move_processing.php' => .4, |
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'sector_scan.php' => .4, |
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'shop_goods_processing.php' => .4, |
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'trader_attack_processing.php' => .75, |
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'trader_examine.php' => .75 |
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); |
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protected static MySqlDatabase $db; |
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private static ?string $session_id; |
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private static int $game_id; |
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private static array $var; |
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private static array $commonIDs = []; |
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private static bool $generate; |
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private static string $SN = ''; |
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private static string $lastSN; |
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private static int $account_id; |
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public static int $last_accessed; |
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protected static ?array $previousAjaxReturns; |
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protected static array $ajaxReturns = array(); |
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public static function init() : void { |
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// Return immediately if the SmrSession is already initialized |
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if (isset(self::$session_id)) { |
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return; |
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} |
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// Initialize the db connector here, since `init` is always called |
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self::$db = MySqlDatabase::getInstance(); |
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// now try the cookie |
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if (isset($_COOKIE['session_id']) && strlen($_COOKIE['session_id']) === 32) { |
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self::$session_id = $_COOKIE['session_id']; |
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} else { |
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// create a new session id |
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do { |
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self::$session_id = md5(uniqid(strval(rand()))); |
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self::$db->query('SELECT 1 FROM active_session WHERE session_id = ' . self::$db->escapeString(self::$session_id) . ' LIMIT 1'); |
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} while (self::$db->nextRecord()); //Make sure we haven't somehow clashed with someone else's session. |
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// This is a minor hack to make sure that setcookie is not called |
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// for CLI programs and tests (to avoid "headers already sent"). |
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if (headers_sent() === false) { |
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setcookie('session_id', self::$session_id); |
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} |
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} |
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// try to get current session |
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self::$db->query('DELETE FROM active_session WHERE last_accessed < ' . self::$db->escapeNumber(time() - self::TIME_BEFORE_EXPIRY)); |
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self::fetchVarInfo(); |
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$sn = Request::get('sn', ''); |
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if (!USING_AJAX && !empty($sn) && !empty(self::$var[$sn])) { |
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$var = self::$var[$sn]; |
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$currentPage = $var['url'] == 'skeleton.php' ? $var['body'] : $var['url']; |
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$loadDelay = self::URL_LOAD_DELAY[$currentPage] ?? 0; |
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$initialTimeBetweenLoads = microtime(true) - $var['PreviousRequestTime']; |
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while (($timeBetweenLoads = microtime(true) - $var['PreviousRequestTime']) < $loadDelay) { |
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$sleepTime = IRound(($loadDelay - $timeBetweenLoads) * 1000000); |
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// echo 'Sleeping for: ' . $sleepTime . 'us'; |
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usleep($sleepTime); |
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} |
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if (ENABLE_DEBUG) { |
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self::$db->query('INSERT INTO debug VALUES (' . self::$db->escapeString('Delay: ' . $currentPage) . ',' . self::$db->escapeNumber(self::$account_id) . ',' . self::$db->escapeNumber($initialTimeBetweenLoads) . ',' . self::$db->escapeNumber($timeBetweenLoads) . ')'); |
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} |
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} |
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} |
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public static function fetchVarInfo() : void { |
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self::$db->query('SELECT * FROM active_session WHERE session_id = ' . self::$db->escapeString(self::$session_id) . ' LIMIT 1'); |
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if (self::$db->nextRecord()) { |
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self::$generate = false; |
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self::$session_id = self::$db->getField('session_id'); |
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self::$account_id = self::$db->getInt('account_id'); |
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self::$game_id = self::$db->getInt('game_id'); |
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self::$last_accessed = self::$db->getInt('last_accessed'); |
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self::$lastSN = self::$db->getField('last_sn'); |
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// We may not have ajax_returns if ajax was disabled |
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self::$previousAjaxReturns = self::$db->getObject('ajax_returns', true, true); |
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self::$var = self::$db->getObject('session_var', true); |
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foreach (self::$var as $key => $value) { |
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if ($value['Expires'] > 0 && $value['Expires'] <= Smr\Epoch::time()) { // Use 0 for infinity |
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//This link is no longer valid |
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unset(self::$var[$key]); |
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} elseif ($value['RemainingPageLoads'] < 0) { |
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//This link is no longer valid |
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unset(self::$var[$key]); |
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} else { |
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--self::$var[$key]['RemainingPageLoads']; |
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if (isset($value['CommonID'])) { |
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self::$commonIDs[$value['CommonID']] = $key; |
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} |
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} |
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} |
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} else { |
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self::$generate = true; |
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self::$account_id = 0; |
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self::$game_id = 0; |
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self::$var = array(); |
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} |
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} |
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public static function update() : void { |
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foreach (self::$var as $key => $value) { |
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if ($value['RemainingPageLoads'] <= 0) { |
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//This link was valid this load but will not be in the future, removing it now saves database space and data transfer. |
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unset(self::$var[$key]); |
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} |
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} |
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if (!self::$generate) { |
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self::$db->query('UPDATE active_session SET account_id=' . self::$db->escapeNumber(self::$account_id) . ',game_id=' . self::$db->escapeNumber(self::$game_id) . (!USING_AJAX ? ',last_accessed=' . self::$db->escapeNumber(Smr\Epoch::time()) : '') . ',session_var=' . self::$db->escapeObject(self::$var, true) . |
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',last_sn=' . self::$db->escapeString(self::$SN) . |
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' WHERE session_id=' . self::$db->escapeString(self::$session_id) . (USING_AJAX ? ' AND last_sn=' . self::$db->escapeString(self::$lastSN) : '') . ' LIMIT 1'); |
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} else { |
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self::$db->query('DELETE FROM active_session WHERE account_id = ' . self::$db->escapeNumber(self::$account_id) . ' AND game_id = ' . self::$db->escapeNumber(self::$game_id)); |
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self::$db->query('INSERT INTO active_session (session_id, account_id, game_id, last_accessed, session_var) VALUES(' . self::$db->escapeString(self::$session_id) . ',' . self::$db->escapeNumber(self::$account_id) . ',' . self::$db->escapeNumber(self::$game_id) . ',' . self::$db->escapeNumber(Smr\Epoch::time()) . ',' . self::$db->escapeObject(self::$var, true) . ')'); |
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self::$generate = false; |
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} |
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} |
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/** |
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* Returns the Game ID associated with the session. |
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*/ |
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public static function getGameID() : int { |
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return self::$game_id; |
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} |
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/** |
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* Returns true if the session is inside a game, false otherwise. |
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*/ |
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public static function hasGame() : bool { |
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return self::$game_id != 0; |
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} |
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public static function hasAccount() : bool { |
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return self::$account_id > 0; |
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} |
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public static function getAccountID() : int { |
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return self::$account_id; |
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} |
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public static function getAccount() : SmrAccount { |
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return SmrAccount::getAccount(self::$account_id); |
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} |
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/** |
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* Sets the `account_id` attribute of this session. |
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*/ |
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public static function setAccount(AbstractSmrAccount $account) : void { |
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self::$account_id = $account->getAccountID(); |
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} |
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/** |
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* Updates the `game_id` attribute of the session and deletes any other |
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* active sessions in this game for this account. |
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*/ |
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public static function updateGame(int $gameID) : void { |
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if (self::$game_id == $gameID) { |
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return; |
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} |
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self::$game_id = $gameID; |
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self::$db->query('DELETE FROM active_session WHERE account_id = ' . self::$db->escapeNumber(self::$account_id) . ' AND game_id = ' . self::$game_id); |
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self::$db->query('UPDATE active_session SET game_id=' . self::$db->escapeNumber(self::$game_id) . ' WHERE session_id=' . self::$db->escapeString(self::$session_id)); |
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} |
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/** |
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* Returns true if the current SN is different than the previous SN. |
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*/ |
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public static function hasChangedSN() : bool { |
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return self::$SN != self::$lastSN; |
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} |
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private static function updateSN() : void { |
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if (!USING_AJAX) { |
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self::$db->query('UPDATE active_session SET last_sn=' . self::$db->escapeString(self::$SN) . |
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' WHERE session_id=' . self::$db->escapeString(self::$session_id) . ' LIMIT 1'); |
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} |
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} |
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public static function destroy() : void { |
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self::$db->query('DELETE FROM active_session WHERE session_id = ' . self::$db->escapeString(self::$session_id)); |
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self::$session_id = null; |
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self::$account_id = 0; |
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self::$game_id = 0; |
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} |
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/** |
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* Retrieve the session var for the page given by $sn. |
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* If $sn is not specified, use the current page (i.e. self::$SN). |
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*/ |
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public static function retrieveVar(string $sn = null) : Page|false { |
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if (is_null($sn)) { |
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$sn = self::$SN; |
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} |
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if (empty(self::$var[$sn])) { |
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return false; |
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} |
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self::$SN = $sn; |
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SmrSession::updateSN(); |
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if (isset(self::$var[$sn]['body']) && isset(self::$var[$sn]['CommonID'])) { |
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// if(preg_match('/processing/',self::$var[$sn]['body'])) |
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unset(self::$commonIDs[self::$var[$sn]['CommonID']]); //Do not store common id for current page |
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unset(self::$var[$sn]['CommonID']); |
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} |
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self::$var[$sn]['RemainingPageLoads'] += 1; // Allow refreshing |
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self::$var[$sn]['Expires'] = 0; // Allow refreshing forever |
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return self::$var[$sn]; |
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} |
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/** |
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* Gets a var from $var, $_REQUEST, or $default. Then stores it in the |
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* session so that it can still be retrieved when the page auto-refreshes. |
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* This is the recommended way to get $_REQUEST data for display pages. |
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* For processing pages, see the Request class. |
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*/ |
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public static function getRequestVar(string $varName, string $default = null) : string { |
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$result = Request::getVar($varName, $default); |
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self::updateVar($varName, $result); |
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return $result; |
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} |
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public static function getRequestVarInt(string $varName, int $default = null) : int { |
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$result = Request::getVarInt($varName, $default); |
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self::updateVar($varName, $result); |
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return $result; |
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} |
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public static function getRequestVarIntArray(string $varName, array $default = null) : array { |
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$result = Request::getVarIntArray($varName, $default); |
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self::updateVar($varName, $result); |
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return $result; |
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} |
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public static function resetLink(Page $container, string $sn) : string { |
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//Do not allow sharing SN, useful for forwarding. |
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global $lock; |
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if (isset(self::$var[$sn]['CommonID'])) { |
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unset(self::$commonIDs[self::$var[$sn]['CommonID']]); //Do not store common id for reset page, to allow refreshing to always give the same page in response |
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} |
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self::$SN = $sn; |
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if (!isset($container['Expires'])) { |
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$container['Expires'] = 0; // Lasts forever |
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} |
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if (!isset($container['RemainingPageLoads'])) { |
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$container['RemainingPageLoads'] = 1; // Allow refreshing |
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} |
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if (!isset($container['PreviousRequestTime'])) { |
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if (isset(self::$var[$sn]['PreviousRequestTime'])) { |
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$container['PreviousRequestTime'] = self::$var[$sn]['PreviousRequestTime']; // Copy across the previous request time if not explicitly set. |
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} |
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} |
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self::$var[$sn] = $container; |
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if (!$lock && !USING_AJAX) { |
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self::update(); |
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} |
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return $sn; |
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} |
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281
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public static function updateVar(string $key, mixed $value) : void { |
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global $var; |
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if ($value === null) { |
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if (isset($var[$key])) { |
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unset($var[$key]); |
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} |
|
287
|
|
|
if (isset($var[self::$SN][$key])) { |
|
288
|
|
|
unset(self::$var[self::$SN][$key]); |
|
289
|
|
|
} |
|
290
|
|
|
} else { |
|
291
|
|
|
$var[$key] = $value; |
|
292
|
|
|
self::$var[self::$SN][$key] = $value; |
|
293
|
|
|
} |
|
294
|
|
|
} |
|
295
|
|
|
|
|
296
|
|
|
public static function clearLinks() : void { |
|
297
|
|
|
self::$var = array(self::$SN => self::$var[self::$SN]); |
|
298
|
|
|
self::$commonIDs = array(); |
|
299
|
|
|
} |
|
300
|
|
|
|
|
301
|
|
|
public static function addLink(Page $container) : string { |
|
302
|
|
|
$sn = self::generateSN($container); |
|
303
|
|
|
self::$var[$sn] = $container; |
|
304
|
|
|
return $sn; |
|
305
|
|
|
} |
|
306
|
|
|
|
|
307
|
|
|
protected static function generateSN(Page $container) : string { |
|
308
|
|
|
if (isset(self::$commonIDs[$container['CommonID']])) { |
|
309
|
|
|
$sn = self::$commonIDs[$container['CommonID']]; |
|
310
|
|
|
$container['PreviousRequestTime'] = isset(self::$var[$sn]) ? self::$var[$sn]['PreviousRequestTime'] : Smr\Epoch::microtime(); |
|
311
|
|
|
} else { |
|
312
|
|
|
do { |
|
313
|
|
|
$sn = random_alphabetic_string(6); |
|
314
|
|
|
} while (isset(self::$var[$sn])); |
|
315
|
|
|
$container['PreviousRequestTime'] = Smr\Epoch::microtime(); |
|
316
|
|
|
} |
|
317
|
|
|
self::$commonIDs[$container['CommonID']] = $sn; |
|
318
|
|
|
return $sn; |
|
319
|
|
|
} |
|
320
|
|
|
|
|
321
|
|
|
public static function addAjaxReturns(string $element, string $contents) : bool { |
|
322
|
|
|
self::$ajaxReturns[$element] = $contents; |
|
323
|
|
|
return isset(self::$previousAjaxReturns[$element]) && self::$previousAjaxReturns[$element] == $contents; |
|
324
|
|
|
} |
|
325
|
|
|
|
|
326
|
|
|
public static function saveAjaxReturns() : void { |
|
327
|
|
|
if (empty(self::$ajaxReturns)) { |
|
328
|
|
|
return; |
|
329
|
|
|
} |
|
330
|
|
|
self::$db->query('UPDATE active_session SET ajax_returns=' . self::$db->escapeObject(self::$ajaxReturns, true) . |
|
331
|
|
|
' WHERE session_id=' . self::$db->escapeString(self::$session_id) . ' LIMIT 1'); |
|
332
|
|
|
} |
|
333
|
|
|
} |
|
334
|
|
|
|
|
335
|
|
|
SmrSession::init(); |
|
336
|
|
|
|
smrealms /
smr
