Subscription enumeration, tweaks

src/Broker/SseSubscriber.php

@@ -5,14 +5,18 @@ namespace NoccyLabs\Mercureact\Broker;
 use NoccyLabs\SimpleJWT\JWTToken;
 use Psr\Http\Message\ServerRequestInterface;
 use React\Stream\WritableStreamInterface;
+use Symfony\Component\Uid\Uuid;
 
 class SseSubscriber implements SubscriberInterface
 {
+    private string $id;
+
     public function __construct(
         private WritableStreamInterface $stream,
         private ServerRequestInterface $request,
     )
     {
+        $this->id = (string)Uuid::v7();
     }
 
     public function deliver(Message $message): void
@@ -24,4 +28,9 @@ class SseSubscriber implements SubscriberInterface
     {
         return $this->request->getAttribute('authorization') instanceof JWTToken;
     }
+
+    public function getId(): string
+    {
+        return "urn:uuid:".$this->id;
+    }
 }

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
      * 

src/Broker/TopicManager.php

@@ -53,6 +53,27 @@ class TopicManager
         }
     }
 
+    public function getSubscriptions(): array
+    {
+        $all = [];
+
+        foreach ($this->topics as $topic) {
+            $subs = $topic->getSubscribers();
+            foreach ($subs as $sub) {
+                $all[] = [
+                    'id' => './well-known/mercure/subsciptions/'.urlencode($topic->getTopic())."/".urlencode($sub->getId()),
+                    'type' => "Subscription",
+                    'topic' => $topic->getTopic(),
+                    'subscriber' => $sub->getId(),
+                    'active' => true,
+                    'payload' => null,
+                ];
+            }
+        }
+
+        return $all;
+    }
+
     public function getTopicCount(): int
     {
         return count($this->topics);