void _onBatch()

in lib/src/directory_watcher/linux.dart [148:193]

• 33 lines of code
• 8 McCabe index (conditional complexity)

  void _onBatch(List<FileSystemEvent> batch) {
    var files = <String>{};
    var dirs = <String>{};
    var changed = <String>{};

    // inotify event batches are ordered by occurrence, so we treat them as a
    // log of what happened to a file. We only emit events based on the
    // difference between the state before the batch and the state after it, not
    // the intermediate state.
    for (var event in batch) {
      // If the watched directory is deleted or moved, we'll get a deletion
      // event for it. Ignore it; we handle closing [this] when the underlying
      // stream is closed.
      if (event.path == path) continue;

      changed.add(event.path);

      if (event is FileSystemMoveEvent) {
        files.remove(event.path);
        dirs.remove(event.path);

        var destination = event.destination;
        if (destination == null) continue;

        changed.add(destination);
        if (event.isDirectory) {
          files.remove(destination);
          dirs.add(destination);
        } else {
          files.add(destination);
          dirs.remove(destination);
        }
      } else if (event is FileSystemDeleteEvent) {
        files.remove(event.path);
        dirs.remove(event.path);
      } else if (event.isDirectory) {
        files.remove(event.path);
        dirs.add(event.path);
      } else {
        files.add(event.path);
        dirs.remove(event.path);
      }
    }

    _applyChanges(files, dirs, changed);
  }