use std::path::Component;use std::path::Path;use std::path::PathBuf;use crate::backend::MemoriesBackendError;pub(super) async fn read_sorted_dir_paths(    dir_path: &Path,) -> Result<Vec<PathBuf>, MemoriesBackendError> {    let mut dir = match tokio::fs::read_dir(dir_path).await {        Ok(dir) => dir,        Err(err) if err.kind() == std::io::ErrorKind::NotFound => return Ok(Vec::new()),        Err(err) => return Err(err.into()),    };    let mut paths = Vec::new();    while let Some(entry) = dir.next_entry().await? {        paths.push(entry.path());    }    paths.sort();    Ok(paths)}pub(super) fn reject_symlink(    path: &str,    metadata: &std::fs::Metadata,) -> Result<(), MemoriesBackendError> {    if metadata.file_type().is_symlink() {        return Err(MemoriesBackendError::invalid_path(            path,            "must not be a symlink",        ));    }    Ok(())}pub(super) fn is_hidden_component(component: Component<'_>) -> bool {    matches!(        component,        Component::Normal(name) if name.to_string_lossy().starts_with('.')    )}pub(super) fn is_hidden_path(path: &Path) -> bool {    path.file_name()        .is_some_and(|name| name.to_string_lossy().starts_with('.'))}pub(super) fn display_relative_path(root: &Path, path: &Path) -> String {    path.strip_prefix(root)        .unwrap_or(path)        .components()        .map(|component| component.as_os_str().to_string_lossy())        .filter(|component| !component.is_empty())        .collect::<Vec<_>>()        .join("/")}