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|
use std::fmt;
use std::str;
use std::hash::{Hash, Hasher};
use std::cell::RefCell;
use quickcheck::{Arbitrary, Gen};
use rfc2822::{NameAddr, AddrSpec};
use Result;
use packet;
use Packet;
/// Holds a UserID packet.
///
/// See [Section 5.11 of RFC 4880] for details.
///
/// [Section 5.11 of RFC 4880]: https://tools.ietf.org/html/rfc4880#section-5.11
pub struct UserID {
/// CTB packet header fields.
pub(crate) common: packet::Common,
/// The user id.
///
/// According to [RFC 4880], the text is by convention UTF-8 encoded
/// and in "mail name-addr" form, i.e., "Name (Comment)
/// <email@example.com>".
///
/// [RFC 4880]: https://tools.ietf.org/html/rfc4880#section-5.11
///
/// Use `UserID::default()` to get a UserID with a default settings.
value: Vec<u8>,
parsed: RefCell<Option<(Option<String>, Option<String>, Option<String>)>>,
}
impl From<Vec<u8>> for UserID {
fn from(u: Vec<u8>) -> Self {
UserID {
common: Default::default(),
value: u,
parsed: RefCell::new(None),
}
}
}
impl<'a> From<&'a str> for UserID {
fn from(u: &'a str) -> Self {
let b = u.as_bytes();
let mut v = Vec::with_capacity(b.len());
v.extend_from_slice(b);
v.into()
}
}
impl fmt::Display for UserID {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let userid = String::from_utf8_lossy(&self.value[..]);
write!(f, "{}", userid)
}
}
impl fmt::Debug for UserID {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let userid = String::from_utf8_lossy(&self.value[..]);
f.debug_struct("UserID")
.field("value", &userid)
.finish()
}
}
impl PartialEq for UserID {
fn eq(&self, other: &UserID) -> bool {
self.common == other.common
&& self.value == other.value
}
}
impl Eq for UserID {
}
impl Hash for UserID {
fn hash<H: Hasher>(&self, state: &mut H) {
// We hash only the data; the cache does not implement hash.
self.common.hash(state);
self.value.hash(state);
}
}
impl Clone for UserID {
fn clone(&self) -> Self {
UserID {
common: self.common.clone(),
value: self.value.clone(),
parsed: RefCell::new(None),
}
}
}
impl UserID {
/// Gets the user ID packet's value.
pub fn value(&self) -> &[u8] {
self.value.as_slice()
}
fn do_parse(&self) -> Result<()> {
if self.parsed.borrow().is_none() {
let s = str::from_utf8(&self.value)?;
*self.parsed.borrow_mut() = Some(match NameAddr::parse(s) {
Ok(na) => (na.name().map(|s| s.to_string()),
na.comment().map(|s| s.to_string()),
na.address().map(|s| s.to_string())),
Err(err) => {
// Try with the addr-spec parser.
if let Ok(a) = AddrSpec::parse(s) {
(None, None, Some(a.address().to_string()))
} else {
// Return the error from the NameAddr parser.
return Err(err.into());
}
}
});
}
Ok(())
}
/// Treats the user ID as an RFC 2822 name-addr and extracts the
/// display name, if any.
pub fn name(&self) -> Result<Option<String>> {
self.do_parse()?;
match *self.parsed.borrow() {
Some((ref name, ref _comment, ref _address)) =>
Ok(name.as_ref().map(|s| s.clone())),
None => unreachable!(),
}
}
/// Treats the user ID as an RFC 2822 name-addr and extracts the
/// first comment, if any.
pub fn comment(&self) -> Result<Option<String>> {
self.do_parse()?;
match *self.parsed.borrow() {
Some((ref _name, ref comment, ref _address)) =>
Ok(comment.as_ref().map(|s| s.clone())),
None => unreachable!(),
}
}
/// Treats the user ID as an RFC 2822 name-addr and extracts the
/// address, if any.
pub fn address(&self) -> Result<Option<String>> {
self.do_parse()?;
match *self.parsed.borrow() {
Some((ref _name, ref _comment, ref address)) =>
Ok(address.as_ref().map(|s| s.clone())),
None => unreachable!(),
}
}
}
impl From<UserID> for Packet {
fn from(s: UserID) -> Self {
Packet::UserID(s)
}
}
impl Arbitrary for UserID {
fn arbitrary<G: Gen>(g: &mut G) -> Self {
Vec::<u8>::arbitrary(g).into()
}
}
#[cfg(test)]
mod tests {
use super::*;
use parse::Parse;
use serialize::SerializeInto;
quickcheck! {
fn roundtrip(p: UserID) -> bool {
let q = UserID::from_bytes(&p.to_vec().unwrap()).unwrap();
assert_eq!(p, q);
true
}
}
#[test]
fn name_addr() {
fn c(value: &str, ok: bool,
name: Option<&str>, comment: Option<&str>, address: Option<&str>)
{
let name = name.map(|s| s.to_string());
let comment = comment.map(|s| s.to_string());
let
|