Improve validation logic

Author: lohanidamodar

src/Utopia/Messaging/Adapter/Chat/Discord.php

@@ -5,6 +5,7 @@
 use Utopia\Messaging\Adapter;
 use Utopia\Messaging\Messages\Discord as DiscordMessage;
 use Utopia\Messaging\Response;
+use InvalidArgumentException;
 
 class Discord extends Adapter
 {
@@ -15,16 +16,36 @@ class Discord extends Adapter
 
     /**
      * @param  string  $webhookURL Your Discord webhook URL.
+     * @throws InvalidArgumentException When webhook URL is invalid
      */
     public function __construct(
         private string $webhookURL
     ) {
-        $parts = explode('/webhooks/', $webhookURL);
+        // Validate URL format
+        if (!filter_var($webhookURL, FILTER_VALIDATE_URL)) {
+            throw new InvalidArgumentException('Invalid Discord webhook URL format.');
+        }
+
+        // Validate URL uses https scheme
+        $urlParts = parse_url($webhookURL);
+        if (!isset($urlParts['scheme']) || $urlParts['scheme'] !== 'https') {
+            throw new InvalidArgumentException('Discord webhook URL must use HTTPS scheme.');
+        }
+
+        // Validate host is discord.com
+        if (!isset($urlParts['host']) || $urlParts['host'] !== 'discord.com') {
+            throw new InvalidArgumentException('Discord webhook URL must use discord.com as host.');
+        }
+
+        // Extract and validate webhook ID
+        $parts = explode('/webhooks/', $urlParts['path']);
         if (count($parts) >= 2) {
             $webhookParts = explode('/', $parts[1]);
             $this->webhookId = $webhookParts[0];
         }
-
+        if (empty($this->webhookId)) {
+            throw new InvalidArgumentException('Discord webhook ID cannot be empty.');
+        }
     }
 
     public function getName(): string