Minor cleanup of todos and imports

src/Http/Middleware/MercureHandler.php

@@ -2,14 +2,12 @@
 
 namespace NoccyLabs\Mercureact\Http\Middleware;
 
-use LDAP\Result;
 use NoccyLabs\Mercureact\Broker\Message;
 use NoccyLabs\Mercureact\Broker\SseSubscriber;
 use NoccyLabs\Mercureact\Broker\TopicManager;
 use NoccyLabs\Mercureact\Configuration;
 use NoccyLabs\Mercureact\Http\Exception\RequestException;
 use NoccyLabs\Mercureact\Http\Exception\SecurityException;
-use NoccyLabs\SimpleJWT\JWTToken;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use React\EventLoop\Loop;
@@ -172,12 +170,14 @@ class MercureHandler
             );
         }
 
+        // Explicitly check for duplicate message IDs.
         if ($this->config->getRejectDuplicateMessages() && !empty($data['id'])) {
             if (in_array($data['id'], $this->seenMessageIds)) {
                 return Response::plaintext("Duplicate message id")->withStatus(Response::STATUS_BAD_REQUEST);
             }
             array_push($this->seenMessageIds, $data['id']);
-            $this->seenMessageIds = array_slice($this->seenMessageIds, -100, 100);
+            while (count($this->seenMessageIds) > $this->seenIdHistorySize)
+                array_shift($this->seenMessageIds);
         }
 
         // Put an id in there if none already