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use std::{fmt, ops::Deref, str::FromStr};
use camino::{Utf8Path, Utf8PathBuf};
use crate::WikError;
#[derive(Clone, Debug, PartialEq)]
pub struct WikName {
name: String,
}
impl WikName {
/// Returns a new [WikName] without checking if it is valid
pub fn new_unchecked(name: String) -> Self {
Self { name }
}
pub fn as_path(&self) -> WikPath {
self.into()
}
}
#[derive(Clone, Debug, PartialEq)]
pub struct WikPath {
name: String,
}
impl WikPath {
pub fn join(&self, name: &WikName) -> Self {
Self {
name: format!("{}/{name}", self.name),
}
}
pub fn name(&self) -> WikName {
let (_, name) = self.as_parts();
name
}
pub fn parent(&self) -> Option<WikPath> {
self.name.rsplit_once('/').map(|(parent, _)| parent.into())
}
pub fn as_parts(&self) -> (Option<WikPath>, WikName) {
match self.name.rsplit_once('/') {
None => (None, WikName::new_unchecked(self.name.clone())),
Some((section, name)) => (
Some(section.into()),
WikName::new_unchecked(name.to_owned()),
),
}
}
}
impl<T> From<T> for WikPath
where
T: Into<String>,
{
fn from(value: T) -> Self {
Self { name: value.into() }
}
}
impl From<&WikName> for WikPath {
fn from(name: &WikName) -> Self {
WikPath {
name: name.name.to_owned(),
}
}
}
impl FromStr for WikName {
type Err = WikError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
if s.contains('/') {
Err(WikError::name_has_slashes(s))
} else {
Ok(Self { name: s.to_owned() })
}
}
}
impl AsRef<str> for WikPath {
fn as_ref(&self) -> &str {
&self.name
}
}
impl AsRef<str> for WikName {
fn as_ref(&self) -> &str {
&self.name
}
}
impl fmt::Display for WikPath {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.name)
}
}
impl fmt::Display for WikName {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.name)
}
}
#[derive(Clone, Debug, PartialEq)]
pub struct SafePath(pub Utf8PathBuf);
impl Deref for SafePath {
type Target = Utf8Path;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl AsRef<std::path::Path> for SafePath {
fn as_ref(&self) -> &std::path::Path {
self.0.as_std_path()
}
}
impl fmt::Display for SafePath {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.0)
}
}
#[derive(Clone, Debug, PartialEq)]
pub(crate) enum EitherPath {
Wik(WikPath),
Safe(SafePath),
}
impl EitherPath {
/// Use when the file does not exist yet, but other components are expected to exist.
pub fn safe_nonexist(root: &Utf8Path, wik: &WikPath) -> Result<SafePath, WikError> {
let mut joined = root.join(&wik.name);
let name = joined.file_name().map(<_>::to_owned);
if !joined.pop() || name.is_none() {
return Err(WikError::canonicalization_failed(joined));
}
let name = name.unwrap();
let canon = joined
.canonicalize_utf8()
.map_err(|_| WikError::canonicalization_failed(joined))?;
let path = canon.join(name);
if !Self::check_fs_path(&path, root) {
Err(WikError::illegal_path(wik.clone(), path))
} else {
Ok(SafePath(path))
}
}
pub fn safe(self, root: &Utf8Path) -> Result<SafePath, WikError> {
self.as_safe(root)
}
fn resolve_path(wik: &WikPath, root: &Utf8Path) -> Result<SafePath, WikError> {
let fs_path = root.join(&wik.name);
let fs_canon = fs_path
.canonicalize_utf8()
.map_err(|_| WikError::CanonicalizationFailed { path: fs_path })?;
if !Self::check_fs_path(&fs_canon, root) {
Err(WikError::illegal_path(wik.clone(), fs_canon))
} else {
Ok(SafePath(fs_canon))
}
}
/// Returns `true` if the path is above the root, `false` otherwise
fn check_fs_path(path: &Utf8Path, root: &Utf8Path) -> bool {
path.starts_with(root)
}
fn as_safe(&self, root: &Utf8Path) -> Result<SafePath, WikError> {
match self {
Self::Wik(wik) => Self::resolve_path(wik, root),
Self::Safe(safe) => Ok(safe.clone()),
}
}
}
impl From<WikPath> for EitherPath {
fn from(value: WikPath) -> Self {
Self::Wik(value)
}
}
impl From<SafePath> for EitherPath {
fn from(value: SafePath) -> Self {
Self::Safe(value)
}
}
|
