function checkFolders()
{
$baseFolder = GalleryResourceStorage::getResourcesStorageFolder();
$userFolder = GalleryResourceStorage::getUserFolder($this->_blogInfo->getId());
$previewsFolder = GalleryResourceStorage::getPreviewsFolder($this->_blogInfo->getId());
$folders = "{$baseFolder}<br/>{$userFolder}<br/>{$previewsFolder}";
$message = "";
// check if the storage folder exists and it is readable
if (!GalleryResourceStorage::checkBaseStorageFolder() || !GalleryResourceStorage::checkUserStorageFolder($this->_blogInfo->getId()) || !GalleryResourceStorage::checkPreviewsStorageFolder($this->_blogInfo->getId()) || !GalleryResourceStorage::checkMediumSizePreviewsStorageFolder($this->_blogInfo->getId())) {
$message = $this->_locale->pr("error_base_storage_folder_missing_or_unreadable", $folders);
}
return $message;
}
