Moved into existing check

src/MediaSource/MediaSourceService.php

@@ -290,17 +290,11 @@ class MediaSourceService {
 
       $directory = $this->fileSystem->dirname($content_location);
       
-      // Check if the directory is writable.
-      if (!is_writable(dirname($directory))) {
+      if (!$this->fileSystem->prepareDirectory($directory, FileSystemInterface::CREATE_DIRECTORY | FileSystemInterface::MODIFY_PERMISSIONS)) {
         $parent_directory = dirname($directory);
         $error_current_user = shell_exec('whoami');
         $sanitized_current_user = str_replace(array("\n", "\r"), '', $error_current_user);
-        throw new HttpException(500, "The user '$sanitized_current_user' does not have permissions to write to: '$parent_directory' . Error");
-      }
-
-
-      if (!$this->fileSystem->prepareDirectory($directory, FileSystemInterface::CREATE_DIRECTORY | FileSystemInterface::MODIFY_PERMISSIONS)) {
-        throw new HttpException(500, "The destination directory does not exist, could not be created, or is not writable: $directory");
+        throw new HttpException(500, "The destination directory does not exist, could not be created, or is not writable by $sanitized_current_user: $directory");
       }
 
       // Copy over the file content.