Fixed captions on whatsapp audio (#522)

Author: SecondeJK

src/Messages/MessageObjects/AudioObject.php

@@ -6,43 +6,43 @@
 
 class AudioObject implements ArrayHydrateInterface
 {
-    public function __construct(private string $url, private string $caption = '')
+    /**
+     * Legacy to pass in a caption as this should never have been supported. Nothing will happen if you pass one in.
+     */
+    public function __construct(private string $url, private readonly ?string $caption = null)
     {
     }
 
     public function fromArray(array $data): AudioObject
     {
         $this->url = $data['url'];
 
-        if (isset($data['caption'])) {
-            $this->caption = $data['caption'];
-        }
-
         return $this;
     }
 
     public function toArray(): array
     {
-        $returnArray = [
+        return [
             'url' => $this->url
         ];
-
-        if ($this->caption) {
-            $returnArray[] = [
-                'caption' => $this->caption
-            ];
-        }
-
-        return $returnArray;
     }
 
     public function getUrl(): string
     {
         return $this->url;
     }
 
+    /**
+     * @deprecated Unsupported
+     * @return string
+     */
     public function getCaption(): string
     {
+        trigger_error(
+            'Captions are not supported in this API, this will error at server level.',
+            E_USER_DEPRECATED
+        );
+
         return $this->caption;
     }
 }

test/Messages/ClientTest.php

@@ -376,7 +376,7 @@ public function testCanSendWhatsAppAudio(): void
     {
         $audioObject = new AudioObject(
             'https://file-examples.com/wp-content/uploads/2017/11/file_example_MP3_700KB.mp3',
-            'some audio'
+            null
         );
 
         $payload = [