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use std::{
fmt::{self, Display},
mem,
};
#[cfg(feature = "rand")]
use crate::generate_localpart;
#[repr(transparent)]
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[cfg_attr(feature = "serde", derive(serde::Serialize), serde(transparent))]
pub struct DeviceId(str);
impl DeviceId {
#[allow(clippy::transmute_ptr_to_ptr)]
fn from_borrowed(s: &str) -> &Self {
unsafe { mem::transmute(s) }
}
fn from_owned(s: Box<str>) -> Box<Self> {
unsafe { mem::transmute(s) }
}
fn into_owned(self: Box<Self>) -> Box<str> {
unsafe { mem::transmute(self) }
}
#[cfg(feature = "rand")]
#[cfg_attr(docsrs, doc(cfg(feature = "rand")))]
pub fn new() -> Box<Self> {
Self::from_owned(generate_localpart(8))
}
pub fn as_str(&self) -> &str {
&self.0
}
pub fn as_bytes(&self) -> &[u8] {
self.0.as_bytes()
}
}
impl Clone for Box<DeviceId> {
fn clone(&self) -> Self {
(**self).to_owned()
}
}
impl ToOwned for DeviceId {
type Owned = Box<DeviceId>;
fn to_owned(&self) -> Self::Owned {
Self::from_owned(self.0.to_owned().into_boxed_str())
}
}
impl From<&DeviceId> for Box<DeviceId> {
fn from(id: &DeviceId) -> Self {
id.to_owned()
}
}
impl AsRef<str> for DeviceId {
fn as_ref(&self) -> &str {
self.as_str()
}
}
impl AsRef<str> for Box<DeviceId> {
fn as_ref(&self) -> &str {
self.as_str()
}
}
impl<'a> From<&'a str> for &'a DeviceId {
fn from(s: &'a str) -> Self {
DeviceId::from_borrowed(s)
}
}
impl From<&str> for Box<DeviceId> {
fn from(s: &str) -> Self {
DeviceId::from_owned(s.into())
}
}
impl From<String> for Box<DeviceId> {
fn from(s: String) -> Self {
DeviceId::from_owned(s.into())
}
}
impl From<Box<DeviceId>> for String {
fn from(id: Box<DeviceId>) -> Self {
id.into_owned().into()
}
}
impl Display for DeviceId {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.as_str())
}
}
#[cfg(feature = "serde")]
impl<'de> serde::Deserialize<'de> for Box<DeviceId> {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
crate::deserialize_id(deserializer, "An IP address or hostname")
}
}
partial_eq_string!(DeviceId);
partial_eq_string!(Box<DeviceId>);
#[cfg(feature = "rand")]
#[cfg_attr(docsrs, doc(cfg(feature = "rand")))]
#[deprecated = "use DeviceId::new instead"]
pub fn generate() -> Box<DeviceId> {
DeviceId::new()
}
#[cfg(all(test, feature = "rand"))]
mod tests {
use super::DeviceId;
#[test]
fn generate_device_id() {
assert_eq!(DeviceId::new().as_str().len(), 8);
}
}