Allow send file upload in Discord Embed

src/Discord.php

@@ -86,7 +86,7 @@ protected function request($verb, $endpoint, array $data)
                 'headers' => [
                     'Authorization' => 'Bot '.$this->token,
                 ],
-                'json' => $data,
+                'multipart' => $data,
             ]);
         } catch (RequestException $exception) {
             if ($response = $exception->getResponse()) {

src/DiscordChannel.php

@@ -36,9 +36,15 @@ public function send($notifiable, Notification $notification)
         }
 
         $message = $notification->toDiscord($notifiable);
+        $formData = $this->toFormData($message);
 
+        return $this->discord->send($channel, $formData);
+    }
+
+    private function toFormData(DiscordMessage $message): array
+    {
         $data = [
-            'content' => $message->body
+            'content' => $message->body,
         ];
 
         if (count($message->embed) > 0) {
@@ -49,6 +55,20 @@ public function send($notifiable, Notification $notification)
             $data['components'] = $message->components;
         }
 
-        return $this->discord->send($channel, $data);
+        $formData = [
+            [
+                'name' => 'payload_json',
+                'contents' => json_encode($data),
+            ]
+        ];
+
+        foreach ($message->files as $i => $file) {
+            $formData[] = [
+                'name' => 'files[' . $i . ']',
+                'contents' => $file,
+            ];
+        }
+
+        return $formData;
     }
 }

src/DiscordMessage.php

@@ -25,26 +25,36 @@ class DiscordMessage
      */
     public $components;
 
+    /**
+     * The files to be attached to the message.
+     *
+     * @var array
+     */
+    public $files;
+
     /**
      * @param string     $body
      * @param array|null $embed
      *
      * @return static
      */
-    public static function create($body = '', $embed = [], $components = [])
+    public static function create($body = '', $embed = [], $components = [], $files = [])
     {
-        return new static($body, $embed, $components);
+        return new static($body, $embed, $components, $files);
     }
 
     /**
      * @param string $body
      * @param array  $embed
+     * @param array  $components
+     * @param array  $files
      */
-    public function __construct($body = '', $embed = [], $components = [])
+    public function __construct($body = '', $embed = [], $components = [], $files = [])
     {
         $this->body = $body;
         $this->embed = $embed;
         $this->components = $components;
+        $this->files = $files;
     }
 
     /**
@@ -63,7 +73,7 @@ public function body($body)
 
     /**
      * Set a single embedded object.
-     * 
+     *
      * TODO: Refactor to enable multiple embeds.
      * See https://discord.com/developers/docs/resources/channel#create-message
      *
@@ -91,4 +101,18 @@ public function components($components)
 
         return $this;
     }
+
+    /**
+     * Set the files object.
+     *
+     * @param array $files
+     *
+     * @return $this
+     */
+    public function files($files)
+    {
+        $this->files = $files;
+
+        return $this;
+    }
 }