Subscription enumeration, tweaks

src/Broker/Topic.php

@@ -14,6 +14,8 @@ class Topic
     /** @var array<string,Message> */
     private array $messages = [];
     
+    private ?string $lastEventId = null;
+
     /** @var int Creation unixtime */
     private int $created;
 
@@ -69,6 +71,21 @@ class Topic
         $this->subscribers->detach($subscriber);
     }
 
+    public function getSubscribers(): array
+    {
+        return iterator_to_array($this->subscribers);
+    }
+
+    public function getTopic(): string
+    {
+        return $this->topic;
+    }
+
+    public function getLastEventId(): ?string
+    {
+        return $this->lastEventId;
+    }
+
     /**
      * Garbage collect histry
      *