Set remove()

in lib/src/path_set.dart [50:93]

• 28 lines of code
• 9 McCabe index (conditional complexity)

  Set<String> remove(String path) {
    path = _normalize(path);
    var parts = Queue.of(p.split(path));

    // Remove the children of [dir], as well as [dir] itself if necessary.
    //
    // [partialPath] is the path to [dir], and a prefix of [path]; the remaining
    // components of [path] are in [parts].
    Set<String> recurse(_Entry dir, String partialPath) {
      if (parts.length > 1) {
        // If there's more than one component left in [path], recurse down to
        // the next level.
        var part = parts.removeFirst();
        var entry = dir.contents[part];
        if (entry == null || entry.contents.isEmpty) return <String>{};

        partialPath = p.join(partialPath, part);
        var paths = recurse(entry, partialPath);
        // After removing this entry's children, if it has no more children and
        // it's not in the set in its own right, remove it as well.
        if (entry.contents.isEmpty && !entry.isExplicit) {
          dir.contents.remove(part);
        }
        return paths;
      }

      // If there's only one component left in [path], we should remove it.
      var entry = dir.contents.remove(parts.first);
      if (entry == null) return <String>{};

      if (entry.contents.isEmpty) {
        return {p.join(root, path)};
      }

      var set = _explicitPathsWithin(entry, path);
      if (entry.isExplicit) {
        set.add(p.join(root, path));
      }

      return set;
    }

    return recurse(_entries, root);
  }