Default message for ShareNotFound exception

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

lib/private/Share20/DefaultShareProvider.php

@@ -223,7 +223,7 @@ class DefaultShareProvider implements IShareProvider {
 		$cursor->closeCursor();
 
 		if ($data === false) {
-			throw new ShareNotFound();
+			throw new ShareNotFound('Newly created share could not be found');
 		}
 
 		$mailSendValue = $share->getMailSend();

lib/public/Share/Exceptions/ShareNotFound.php

@@ -28,4 +28,18 @@ namespace OCP\Share\Exceptions;
  * @since 9.0.0
  */
 class ShareNotFound extends GenericShareException {
+
+	/**
+	 * @param string $message
+	 * @param string $hint
+	 * @param int $code
+	 * @param \Exception|null $previous
+	 * @since 9.0.0
+	 */
+	public function __construct($message = '', ...$arguments) {
+		if (empty($message)) {
+			$message = 'Share not found';
+		}
+		parent::__construct($message, ...$arguments);
+	}
 }