Method deleteFolder

src/FileRise/Domain/FolderModel.php:1776–1850

* Deletes a folder if it is empty and removes its corresponding metadata. * Also removes ownership mappings for this folder and all its descendants. */

(string $folder)

     * Also removes ownership mappings for this folder and all its descendants.
     */
    public static function deleteFolder(string $folder): array
    {
        if (strtolower($folder) === 'root') {
            return ["error" => "Cannot delete root folder."];
        }

        [$real, $relative, $err] = self::resolveFolderPath($folder, false);
        if ($err) {
            return ["error" => $err];
        }
        $storage = self::storage();

        try {
            UploadModel::cleanupResumableForFolder($relative);
        } catch (\Throwable $e) {
/* ignore */
        }

        // Prevent deletion if not empty.
        if ($storage->isLocal()) {
            $items = array_diff(@scandir($real) ?: [], array('.', '..'));
        } else {
            $markerName = defined('FR_REMOTE_DIR_MARKER') ? (string)FR_REMOTE_DIR_MARKER : '.filerise_keep';
            $items = array_values(array_filter(
                $storage->list($real),
                static function ($n) use ($markerName) {
                    if ($n === '.' || $n === '..' || $n === '') {
                        return false;
                    }
                    if ($markerName !== '' && $n === $markerName) {
                        return false;
                    }
                    return true;
                }
            ));
        }
        if (count($items) > 0) {
            return ["error" => "Folder is not empty."];
        }

        if (!$storage->isLocal()) {
            $markerName = defined('FR_REMOTE_DIR_MARKER') ? (string)FR_REMOTE_DIR_MARKER : '.filerise_keep';
            if ($markerName !== '') {
                $markerPath = rtrim($real, '/\\') . DIRECTORY_SEPARATOR . $markerName;
                $storage->delete($markerPath);
            }
        }

        if (!$storage->delete($real)) {
            return ["error" => "Failed to delete folder."];
        }

        // Remove metadata file (best-effort).
        $metadataFile = self::getMetadataFilePath($relative);
        if (file_exists($metadataFile)) {
            @unlink($metadataFile);
        }