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use std::fmt::{self, Debug};
use std::ops::Index;
use std::path::{Path, PathBuf};
use base::crypto::Crypto;
#[repr(C)]
#[derive(
PartialEq, PartialOrd, Ord, Eq, Hash, Default, Clone, Deserialize, Serialize,
)]
pub struct Eid([u8; Eid::EID_SIZE]);
impl Eid {
pub(crate) const EID_SIZE: usize = 32;
#[inline]
pub(crate) fn new_empty() -> Self {
Eid::default()
}
pub(crate) fn new() -> Self {
let mut eid = Eid::new_empty();
Crypto::random_buf(&mut eid.0);
eid
}
#[inline]
pub(crate) fn is_empty(&self) -> bool {
*self == Eid::default()
}
pub(crate) fn from_slice(buf: &[u8]) -> Self {
assert_eq!(buf.len(), Eid::EID_SIZE);
let mut ret = Eid::new_empty();
ret.0.copy_from_slice(buf);
ret
}
pub(crate) fn to_path_buf<P: AsRef<Path>>(&self, base: P) -> PathBuf {
let s = self.to_string();
base.as_ref().join(&s[0..2]).join(&s[2..4]).join(&s)
}
#[allow(dead_code)]
pub(crate) fn to_rel_path(&self) -> PathBuf {
let base = Path::new("");
self.to_path_buf(&base)
}
}
impl AsRef<[u8]> for Eid {
#[inline]
fn as_ref(&self) -> &[u8] {
&self.0
}
}
impl Index<usize> for Eid {
type Output = u8;
#[inline]
fn index(&self, idx: usize) -> &u8 {
&self.0[idx]
}
}
impl Debug for Eid {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Eid({})", &self.to_string()[..6])
}
}
impl ToString for Eid {
fn to_string(&self) -> String {
let strs: Vec<String> =
self.0.iter().map(|b| format!("{:02x}", b)).collect();
strs.join("")
}
}
pub trait Id {
fn id(&self) -> &Eid;
fn id_mut(&mut self) -> &mut Eid;
}