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//! Provides extension traits for [`Metadata`].
use super::private;
use crate::ext::time::{
SystemTimeOutOfRange, duration_to_system_time, opt_system_time_to_duration,
saturating_duration_to_system_time,
};
use libpna::Metadata;
use std::{fs, io, path::Path, time::SystemTime};
/// [`Metadata`] time-related extension methods.
pub trait MetadataTimeExt: private::Sealed {
/// Returns the created time.
///
/// # Panics
///
/// Panics if the stored duration is outside the platform's representable
/// `SystemTime` range.
#[deprecated(
since = "0.34.0",
note = "panics for archive timestamps outside the platform's SystemTime range; use try_created_time or saturating_created_time"
)]
fn created_time(&self) -> Option<SystemTime>;
/// Returns the modified time.
///
/// # Panics
///
/// Panics if the stored duration is outside the platform's representable
/// `SystemTime` range.
#[deprecated(
since = "0.34.0",
note = "panics for archive timestamps outside the platform's SystemTime range; use try_modified_time or saturating_modified_time"
)]
fn modified_time(&self) -> Option<SystemTime>;
/// Returns the accessed time.
///
/// # Panics
///
/// Panics if the stored duration is outside the platform's representable
/// `SystemTime` range.
#[deprecated(
since = "0.34.0",
note = "panics for archive timestamps outside the platform's SystemTime range; use try_accessed_time or saturating_accessed_time"
)]
fn accessed_time(&self) -> Option<SystemTime>;
/// Returns the created time, or `Err` if the stored duration is outside
/// the platform's representable [`SystemTime`] range.
///
/// # Errors
///
/// Returns [`SystemTimeOutOfRange`] when the stored duration cannot be
/// represented as a [`SystemTime`] on the current platform.
fn try_created_time(&self) -> Result<Option<SystemTime>, SystemTimeOutOfRange>;
/// Returns the modified time, or `Err` if the stored duration is outside
/// the platform's representable [`SystemTime`] range.
///
/// # Errors
///
/// Returns [`SystemTimeOutOfRange`] when the stored duration cannot be
/// represented as a [`SystemTime`] on the current platform.
fn try_modified_time(&self) -> Result<Option<SystemTime>, SystemTimeOutOfRange>;
/// Returns the accessed time, or `Err` if the stored duration is outside
/// the platform's representable [`SystemTime`] range.
///
/// # Errors
///
/// Returns [`SystemTimeOutOfRange`] when the stored duration cannot be
/// represented as a [`SystemTime`] on the current platform.
fn try_accessed_time(&self) -> Result<Option<SystemTime>, SystemTimeOutOfRange>;
/// Returns the created time, clamping an out-of-range stored duration to
/// the platform's representable bound.
fn saturating_created_time(&self) -> Option<SystemTime>;
/// Returns the modified time, clamping an out-of-range stored duration to
/// the platform's representable bound.
fn saturating_modified_time(&self) -> Option<SystemTime>;
/// Returns the accessed time, clamping an out-of-range stored duration to
/// the platform's representable bound.
fn saturating_accessed_time(&self) -> Option<SystemTime>;
/// Sets the created time.
fn with_created_time(self, time: impl Into<Option<SystemTime>>) -> Self;
/// Sets the modified time.
fn with_modified_time(self, time: impl Into<Option<SystemTime>>) -> Self;
/// Sets the accessed time.
fn with_accessed_time(self, time: impl Into<Option<SystemTime>>) -> Self;
}
impl MetadataTimeExt for Metadata {
/// Returns the created time.
///
/// This is the same as [Metadata::created] + [SystemTime::UNIX_EPOCH].
/// ```
/// # #![allow(deprecated)]
/// use pna::{Duration, Metadata, prelude::*};
/// use std::time::UNIX_EPOCH;
///
/// let metadata = Metadata::new().with_created(Some(Duration::seconds(1000)));
///
/// assert_eq!(
/// metadata.created().map(|d| UNIX_EPOCH + d),
/// metadata.created_time(),
/// );
/// ```
#[allow(deprecated)]
#[inline]
fn created_time(&self) -> Option<SystemTime> {
self.created().map(|it| SystemTime::UNIX_EPOCH + it)
}
/// Returns the modified time.
///
/// This is the same as [Metadata::modified] + [SystemTime::UNIX_EPOCH].
/// ```
/// # #![allow(deprecated)]
/// use pna::{Duration, Metadata, prelude::*};
/// use std::time::UNIX_EPOCH;
///
/// let metadata = Metadata::new().with_modified(Some(Duration::seconds(1000)));
///
/// assert_eq!(
/// metadata.modified().map(|d| UNIX_EPOCH + d),
/// metadata.modified_time(),
/// );
/// ```
#[allow(deprecated)]
#[inline]
fn modified_time(&self) -> Option<SystemTime> {
self.modified().map(|it| SystemTime::UNIX_EPOCH + it)
}
/// Returns the accessed time.
///
/// This is the same as [Metadata::accessed] + [SystemTime::UNIX_EPOCH].
/// ```
/// # #![allow(deprecated)]
/// use pna::{Duration, Metadata, prelude::*};
/// use std::time::UNIX_EPOCH;
///
/// let metadata = Metadata::new().with_accessed(Some(Duration::seconds(1000)));
///
/// assert_eq!(
/// metadata.accessed().map(|d| UNIX_EPOCH + d),
/// metadata.accessed_time(),
/// );
/// ```
#[allow(deprecated)]
#[inline]
fn accessed_time(&self) -> Option<SystemTime> {
self.accessed().map(|it| SystemTime::UNIX_EPOCH + it)
}
#[inline]
fn try_created_time(&self) -> Result<Option<SystemTime>, SystemTimeOutOfRange> {
self.created().map(duration_to_system_time).transpose()
}
#[inline]
fn try_modified_time(&self) -> Result<Option<SystemTime>, SystemTimeOutOfRange> {
self.modified().map(duration_to_system_time).transpose()
}
#[inline]
fn try_accessed_time(&self) -> Result<Option<SystemTime>, SystemTimeOutOfRange> {
self.accessed().map(duration_to_system_time).transpose()
}
#[inline]
fn saturating_created_time(&self) -> Option<SystemTime> {
self.created().map(saturating_duration_to_system_time)
}
#[inline]
fn saturating_modified_time(&self) -> Option<SystemTime> {
self.modified().map(saturating_duration_to_system_time)
}
#[inline]
fn saturating_accessed_time(&self) -> Option<SystemTime> {
self.accessed().map(saturating_duration_to_system_time)
}
/// Sets the created time.
///
/// # Examples
/// ```
/// # #![allow(deprecated)]
/// use pna::{Metadata, prelude::*};
/// use std::time::{Duration, SystemTime, UNIX_EPOCH};
///
/// # fn main() {
/// // Time after Unix epoch will be preserved
/// let after_epoch = UNIX_EPOCH + Duration::from_secs(1000);
/// let metadata = Metadata::new().with_created_time(Some(after_epoch));
/// assert_eq!(metadata.created_time(), Some(after_epoch));
///
/// # #[cfg(target_family = "wasm")]
/// # return;
/// let before_epoch = UNIX_EPOCH - Duration::from_secs(1);
/// let metadata = Metadata::new().with_created_time(Some(before_epoch));
/// assert_eq!(metadata.created_time(), Some(before_epoch));
/// # }
/// ```
#[inline]
fn with_created_time(self, time: impl Into<Option<SystemTime>>) -> Self {
self.with_created(opt_system_time_to_duration(time.into()))
}
/// Sets the modified time.
///
/// # Examples
/// ```
/// # #![allow(deprecated)]
/// use pna::{Metadata, prelude::*};
/// use std::time::{Duration, SystemTime, UNIX_EPOCH};
///
/// # fn main() {
/// // Time after Unix epoch will be preserved
/// let after_epoch = UNIX_EPOCH + Duration::from_secs(1000);
/// let metadata = Metadata::new().with_modified_time(Some(after_epoch));
/// assert_eq!(metadata.modified_time(), Some(after_epoch));
///
/// # #[cfg(target_family = "wasm")]
/// # return;
/// let before_epoch = UNIX_EPOCH - Duration::from_secs(1);
/// let metadata = Metadata::new().with_modified_time(Some(before_epoch));
/// assert_eq!(metadata.modified_time(), Some(before_epoch));
/// # }
/// ```
#[inline]
fn with_modified_time(self, time: impl Into<Option<SystemTime>>) -> Self {
self.with_modified(opt_system_time_to_duration(time.into()))
}
/// Sets the accessed time.
///
/// # Examples
/// ```
/// # #![allow(deprecated)]
/// use pna::{Metadata, prelude::*};
/// use std::time::{Duration, SystemTime, UNIX_EPOCH};
///
/// # fn main() {
/// // Time after Unix epoch will be preserved
/// let after_epoch = UNIX_EPOCH + Duration::from_secs(1000);
/// let metadata = Metadata::new().with_accessed_time(Some(after_epoch));
/// assert_eq!(metadata.accessed_time(), Some(after_epoch));
///
/// # #[cfg(target_family = "wasm")]
/// # return;
/// let before_epoch = UNIX_EPOCH - Duration::from_secs(1);
/// let metadata = Metadata::new().with_accessed_time(Some(before_epoch));
/// assert_eq!(metadata.accessed_time(), Some(before_epoch));
/// # }
/// ```
#[inline]
fn with_accessed_time(self, time: impl Into<Option<SystemTime>>) -> Self {
self.with_accessed(opt_system_time_to_duration(time.into()))
}
}
/// [`Metadata`] filesystem-related extension methods.
pub trait MetadataFsExt: private::Sealed {
/// Creates a new [`Metadata`] from the given [`fs::Metadata`].
///
/// # Errors
/// Returns an error if converting from [`fs::Metadata`] fails.
fn from_metadata(metadata: &fs::Metadata) -> io::Result<Self>
where
Self: Sized;
}
impl MetadataFsExt for Metadata {
/// Creates a new [`Metadata`] from the given [`fs::Metadata`].
///
/// # Examples
///
/// ```no_run
/// use pna::{Metadata, prelude::*};
/// use std::fs;
/// # use std::error::Error;
///
/// # fn main() -> Result<(), Box<dyn Error>> {
/// Metadata::from_metadata(&fs::metadata("path/to/file")?)?;
/// Ok(())
/// # }
/// ```
///
/// # Errors
/// Currently never returns an error.
#[inline]
fn from_metadata(metadata: &fs::Metadata) -> io::Result<Self>
where
Self: Sized,
{
fs_metadata_to_metadata(metadata)
}
}
/// [`Metadata`] path-related extension methods.
pub trait MetadataPathExt: private::Sealed {
/// Creates a new [`Metadata`] from the given path.
///
/// # Errors
///
/// Returns an error if retrieving [`std::fs::Metadata`] from the path fails.
fn from_path<P: AsRef<Path>>(path: P) -> io::Result<Self>
where
Self: Sized;
/// Creates a new [`Metadata`] from the given path without following symlinks.
///
/// # Errors
///
/// Returns an error if retrieving [`std::fs::Metadata`] from the path fails.
fn from_symlink_path<P: AsRef<Path>>(path: P) -> io::Result<Self>
where
Self: Sized;
}
impl MetadataPathExt for Metadata {
/// Creates a new [`Metadata`] from the given path.
///
/// # Examples
///
/// ```no_run
/// use pna::{Metadata, prelude::*};
///
/// Metadata::from_path("path/to/file");
/// ```
/// # Errors
///
/// Returns an error if [`std::fs::metadata`] returns an error.
#[inline]
fn from_path<P: AsRef<Path>>(path: P) -> io::Result<Self>
where
Self: Sized,
{
let meta = fs::metadata(path)?;
fs_metadata_to_metadata(&meta)
}
/// Creates a new [`Metadata`] from the given path without following symlinks.
///
/// # Examples
///
/// ```no_run
/// use pna::{Metadata, prelude::*};
///
/// Metadata::from_symlink_path("path/to/file");
/// ```
/// # Errors
///
/// Returns an error if [`std::fs::symlink_metadata`] returns an error.
#[inline]
fn from_symlink_path<P: AsRef<Path>>(path: P) -> io::Result<Self>
where
Self: Sized,
{
let meta = fs::symlink_metadata(path)?;
fs_metadata_to_metadata(&meta)
}
}
#[inline]
fn fs_metadata_to_metadata(meta: &fs::Metadata) -> io::Result<Metadata> {
Ok(Metadata::new()
.with_accessed_time(meta.accessed().ok())
.with_created_time(meta.created().ok())
.with_modified_time(meta.modified().ok()))
}
#[cfg(test)]
mod time_ext_tests {
use super::*;
use libpna::Duration;
#[test]
fn try_modified_time_absent_is_ok_none() {
let m = Metadata::new();
assert_eq!(m.try_modified_time(), Ok(None));
}
#[test]
fn try_modified_time_ordinary_is_ok_some() {
let m = Metadata::new().with_modified(Some(Duration::seconds(1_000)));
assert_eq!(
m.try_modified_time(),
Ok(Some(
SystemTime::UNIX_EPOCH + std::time::Duration::from_secs(1_000)
))
);
}
#[test]
fn saturating_modified_time_out_of_range_is_some_clamped() {
let m = Metadata::new().with_modified(Some(Duration::MAX));
assert!(m.saturating_modified_time().is_some());
}
#[test]
fn saturating_modified_time_absent_is_none() {
assert_eq!(Metadata::new().saturating_modified_time(), None);
}
}