fn children_hierarchy()

in core/src/layers/immutable_index.rs [97:133]

• 25 lines of code
• 5 McCabe index (conditional complexity)

    fn children_hierarchy(&self, path: &str) -> Vec<String> {
        let mut res = HashSet::new();

        for i in self.vec.iter() {
            // `/xyz` should not belong to `/abc`
            if !i.starts_with(path) {
                continue;
            }

            // remove `/abc` if self
            if i == path {
                continue;
            }

            match i[path.len()..].find('/') {
                // File `/abc/def.csv` must belong to `/abc`
                None => {
                    res.insert(i.to_string());
                }
                Some(idx) => {
                    // The index of first `/` after `/abc`.
                    let dir_idx = idx + 1 + path.len();

                    if dir_idx == i.len() {
                        // Dir `/abc/def/` belongs to `/abc/`
                        res.insert(i.to_string());
                    } else {
                        // File/Dir `/abc/def/xyz` doesn't belong to `/abc`.
                        // But we need to list `/abc/def` out so that we can walk down.
                        res.insert(i[..dir_idx].to_string());
                    }
                }
            }
        }

        res.into_iter().collect()
    }