نكتب محادثة عبر الإنترنت على Websockets باستخدام Swoole

 /** * @return Message[] */ public function getAll() { $stmt = $this->pdo->query('SELECT * from messages'); $messages = []; foreach ($stmt->fetchAll() as $row) { $messages[] = new Message( $row['username'], $row['message'], new \DateTime($row['date_time']) ); } return $messages; } 

 public function __construct() { $this->ws = new swoole_websocket_server('0.0.0.0', 9502); $this->ws->on('open', function ($ws, $request) { $this->onConnection($request); }); $this->ws->on('message', function ($ws, $frame) { $this->onMessage($frame); }); $this->ws->on('close', function ($ws, $id) { $this->onClose($id); }); $this->ws->on('workerStart', function (swoole_websocket_server $ws) { $this->onWorkerStart($ws); }); $this->ws->start(); } 

 private function onWorkerStart(swoole_websocket_server $ws) { $this->messagesRepository = new MessagesRepository(); $ws->tick(self::PING_DELAY_MS, function () use ($ws) { foreach ($ws->connections as $id) { $ws->push($id, 'ping', WEBSOCKET_OPCODE_PING); } }); } 

  /** * Init new Connection, and ping DB timer function */ private static function initPdo() { if (self::$timerId === null || (!Timer::exists(self::$timerId))) { self::$timerId = Timer::tick(self::MySQL_PING_INTERVAL, function () { self::ping(); }); } self::$pdo = new PDO(self::DSN, DBConfig::USER, DBConfig::PASSWORD, self::OPT); } /** * Ping database to maintain the connection */ private static function ping() { try { self::$pdo->query('SELECT 1'); } catch (PDOException $e) { self::initPdo(); } } 

 /** * @param string $username * @return bool */ private function isUsernameCurrentlyTaken(string $username) { foreach ($this->usersRepository->getByIds($this->ws->connection_list()) as $user) { if ($user->getUsername() == $username) { return true; } } return false; } 

 <?php namespace App\Helpers; use Swoole\Channel; class RequestLimiter { /** * @var Channel */ private $userIds; const MAX_RECORDS_COUNT = 10; const MAX_REQUESTS_BY_USER = 4; public function __construct() { $this->userIds = new Channel(1024 * 64); } /** * Check if there are too many requests from user * and make a record of request from that user * * @param int $userId * @return bool */ public function checkIsRequestAllowed(int $userId) { $requestsCount = $this->getRequestsCountByUser($userId); $this->addRecord($userId); if ($requestsCount >= self::MAX_REQUESTS_BY_USER) return false; return true; } /** * @param int $userId * @return int */ private function getRequestsCountByUser(int $userId) { $channelRecordsCount = $this->userIds->stats()['queue_num']; $requestsCount = 0; for ($i = 0; $i < $channelRecordsCount; $i++) { $userIdFromChannel = $this->userIds->pop(); $this->userIds->push($userIdFromChannel); if ($userIdFromChannel === $userId) { $requestsCount++; } } return $requestsCount; } /** * @param int $userId */ private function addRecord(int $userId) { $recordsCount = $this->userIds->stats()['queue_num']; if ($recordsCount >= self::MAX_RECORDS_COUNT) { $this->userIds->pop(); } $this->userIds->push($userId); } } 

 <?php namespace App\Helpers; class SpamFilter { /** * @var string[] errors */ private $errors = []; /** * @param string $text * @return bool */ public function checkIsMessageTextCorrect(string $text) { $isCorrect = true; if (empty(trim($text))) { $this->errors[] = 'Empty message text'; $isCorrect = false; } return $isCorrect; } /** * @return string[] errors */ public function getErrors(): array { return $this->errors; } }