performCleanup method

@override Future<void> performCleanup()

Performs cleanup of orphaned files

Implementation

@override
Future<void> performCleanup() async {
  await _ensureInitialized();

  gemmaLog('UnifiedModelManager: Performing cleanup');

  try {
    // 1. Get protected files from ModelRepository
    final protectedFiles = await _getAllProtectedFiles();

    final downloader = FileDownloader();
    // 2. Cancel every task in the group FIRST — cancellation deletes paused
    //    temp files (reset() only clears records), so this must precede both
    //    reset and the fragment sweep (#383/#5).
    final groupTasks = await downloader.allTasks(
      group: SmartDownloader.downloadGroup,
      includeTasksWaitingToRetry: true,
    );
    await downloader.cancelTasksWithIds(
      groupTasks.map((t) => t.taskId).toList(),
    );
    // 3. Reset residual records.
    await downloader.reset(group: SmartDownloader.downloadGroup);
    // 4. Filesystem cleanup last — now only truly-orphaned fragments remain.
    await ModelFileSystemManager.cleanupOrphanedFiles(
      protectedFiles: protectedFiles,
      enableResumeDetection: true,
    );

    gemmaLog('UnifiedModelManager: Cleanup completed');
  } catch (e) {
    gemmaLog('UnifiedModelManager: Cleanup failed: $e');
    // Don't rethrow - cleanup failures should not break the app
  }
}