fix: Correct client state handling in LaravelHttpTransport

Removes in-memory active client tracking (`$activeClients` array and
associated event listeners) from `LaravelHttpTransport`. This local tracking
was unreliable due to Laravel's typical request-response lifecycle where
the transport instance is re-initialized per interaction.

The `ClientStateManager`, which uses a persistent cache, is already
responsible for managing active client state and activity across requests.
The `LaravelHttpTransport` now correctly relies solely on `ClientStateManager`
for queuing messages (`sendToClientAsync`) and updates client activity
via `ClientStateManager` when messages are received.

Author: CodeWithKyrian

src/Transports/LaravelHttpTransport.php

@@ -7,13 +7,11 @@
 use Evenement\EventEmitterTrait;
 use PhpMcp\Server\Contracts\LoggerAwareInterface;
 use PhpMcp\Server\Contracts\ServerTransportInterface;
-use PhpMcp\Server\Exception\TransportException;
 use PhpMcp\Server\State\ClientStateManager;
 use Psr\Log\LoggerInterface;
 use Psr\Log\NullLogger;
 use React\Promise\PromiseInterface;
 
-use function React\Promise\reject;
 use function React\Promise\resolve;
 
 class LaravelHttpTransport implements ServerTransportInterface, LoggerAwareInterface
@@ -24,23 +22,11 @@ class LaravelHttpTransport implements ServerTransportInterface, LoggerAwareInter
 
     protected ClientStateManager $clientStateManager;
 
-    /** @var array<string, true> Tracks active client IDs managed by this transport */
-    private array $activeClients = [];
-
     public function __construct(ClientStateManager $clientStateManager)
     {
         $this->clientStateManager = $clientStateManager;
         $this->logger = new NullLogger;
 
-        $this->on('client_connected', function (string $clientId) {
-            $this->activeClients[$clientId] = true;
-            $this->clientStateManager->updateClientActivity($clientId);
-        });
-
-        $this->on('client_disconnected', function (string $clientId, string $reason) {
-            unset($this->activeClients[$clientId]);
-        });
-
         $this->on('message', function (string $message, string $clientId) {
             $this->clientStateManager->updateClientActivity($clientId);
         });
@@ -68,12 +54,6 @@ public function listen(): void
      */
     public function sendToClientAsync(string $clientId, string $rawFramedMessage): PromiseInterface
     {
-        if (! isset($this->activeClients[$clientId])) {
-            $this->logger->warning('Attempted to send message to inactive or unknown client.', ['clientId' => $clientId]);
-
-            return reject(new TransportException("Client '{$clientId}' is not actively managed by this transport."));
-        }
-
         $messagePayload = rtrim($rawFramedMessage, "\n");
 
         if (empty($messagePayload)) {
@@ -90,13 +70,7 @@ public function sendToClientAsync(string $clientId, string $rawFramedMessage): P
      */
     public function close(): void
     {
-        $activeClientIds = array_keys($this->activeClients);
-
-        foreach ($activeClientIds as $clientId) {
-            $this->emit('client_disconnected', [$clientId, 'Transport globally closed']);
-            $this->emit('close', ['Transport closed.']);
-        }
-
+        $this->emit('close', ['Transport closed.']);
         $this->removeAllListeners();
     }
 }