More tests and refactoring

src/Notification/Ntfy.php

@@ -8,27 +8,41 @@ use Ntfy\Client;
 
 class Ntfy implements NotificationInterface
 {
-    /** @var string[] $config */
-    private array $config;
-
     private Client $client;
-
+    private string $topic = 'default';
     /**
      * Initialize with configuration.
      *
      * @param string[] $config Configuration
      */
-    public function __construct(array $config)
+    public static function factory(array $config): self
     {
-        $this->config = $config;
+        $instance = new self(new Client(new Server($config['domain'])));
+        if (isset($config['topic'])) {
+            $instance->setTopic($config['topic']);
+        }
+        return $instance;
+    }
 
-        $this->client = new Client(new Server($config['domain']));
+    public function __construct(Client $client)
+    {
+        $this->client = $client;
+    }
+
+    public function setTopic(string $topic): void
+    {
+        $this->topic = $topic;
     }
 
     public function send(string $title, string $message): void
     {
+        assert(strlen($title) > 0);
+        assert(strlen($title) < 256);
+        assert(strlen($message) > 0);
+        assert(strlen($message) < 4096);
+
         $msg = new Message();
-        $msg->topic($this->config['topic']);
+        $msg->topic($this->topic);
         $msg->title($title);
         $msg->body($message);
         $this->client->send($msg);