Method migrateSubtree

src/FileRise/Domain/FolderCrypto.php:325–363

* Move encryption markers for an entire subtree: old/... => new/... * Used on folder rename/move. */

(string $source, string $target)

     * Used on folder rename/move.
     */
    public static function migrateSubtree(string $source, string $target): array
    {
        $src = self::normalizeKey($source);
        $dst = self::normalizeKey($target);

        if ($src === $dst) {
            return ['changed' => false, 'moved' => 0];
        }

        $doc = self::load();
        $folders = is_array($doc['folders'] ?? null) ? $doc['folders'] : [];
        if (!$folders) {
            return ['changed' => false, 'moved' => 0];
        }

        $changed = false;
        $moved = 0;
        $next = $folders;

        foreach ($folders as $k => $row) {
            if ($k === $src || strpos($k, $src . '/') === 0) {
                unset($next[$k]);
                $suffix = substr($k, strlen($src)); // '' or '/sub/...'
                $newKey = $dst . $suffix;
                $next[$newKey] = $row;
                $changed = true;
                $moved++;
            }
        }

        if (!$changed) {
            return ['changed' => false, 'moved' => 0];
        }

        $doc2 = ['v' => self::SCHEMA_VERSION, 'folders' => $next];
        $ok = self::write($doc2);

        return ['changed' => $ok, 'moved' => $moved];
    }

    public static function removeSubtree(string $folder): array
    {