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use crate::prelude::*;
use core::fmt;
use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
impl Serialize for Uuid {
fn serialize<S: Serializer>(
&self,
serializer: S,
) -> Result<S::Ok, S::Error> {
if serializer.is_human_readable() {
serializer
.serialize_str(&self.to_hyphenated().encode_lower(&mut [0; 36]))
} else {
serializer.serialize_bytes(self.as_bytes())
}
}
}
impl<'de> Deserialize<'de> for Uuid {
fn deserialize<D: Deserializer<'de>>(
deserializer: D,
) -> Result<Self, D::Error> {
fn de_error<E: de::Error>(e: crate::Error) -> E {
E::custom(format_args!("UUID parsing failed: {}", e))
}
if deserializer.is_human_readable() {
struct UuidStringVisitor;
impl<'vi> de::Visitor<'vi> for UuidStringVisitor {
type Value = Uuid;
fn expecting(
&self,
formatter: &mut fmt::Formatter<'_>,
) -> fmt::Result {
write!(formatter, "a UUID string")
}
fn visit_str<E: de::Error>(
self,
value: &str,
) -> Result<Uuid, E> {
value.parse::<Uuid>().map_err(de_error)
}
fn visit_bytes<E: de::Error>(
self,
value: &[u8],
) -> Result<Uuid, E> {
Uuid::from_slice(value).map_err(de_error)
}
}
deserializer.deserialize_str(UuidStringVisitor)
} else {
struct UuidBytesVisitor;
impl<'vi> de::Visitor<'vi> for UuidBytesVisitor {
type Value = Uuid;
fn expecting(
&self,
formatter: &mut fmt::Formatter<'_>,
) -> fmt::Result {
write!(formatter, "bytes")
}
fn visit_bytes<E: de::Error>(
self,
value: &[u8],
) -> Result<Uuid, E> {
Uuid::from_slice(value).map_err(de_error)
}
}
deserializer.deserialize_bytes(UuidBytesVisitor)
}
}
}
#[cfg(test)]
mod serde_tests {
use serde_test::{Compact, Configure, Readable, Token};
use crate::prelude::*;
#[test]
fn test_serialize_readable() {
let uuid_str = "f9168c5e-ceb2-4faa-b6bf-329bf39fa1e4";
let u = Uuid::parse_str(uuid_str).unwrap();
serde_test::assert_tokens(&u.readable(), &[Token::Str(uuid_str)]);
}
#[test]
fn test_serialize_compact() {
let uuid_bytes = b"F9168C5E-CEB2-4F";
let u = Uuid::from_slice(uuid_bytes).unwrap();
serde_test::assert_tokens(&u.compact(), &[Token::Bytes(uuid_bytes)]);
}
#[test]
fn test_de_failure() {
serde_test::assert_de_tokens_error::<Readable<Uuid>>(
&[Token::Str("hello_world")],
"UUID parsing failed: invalid length: expected one of [36, 32], found 11",
);
serde_test::assert_de_tokens_error::<Compact<Uuid>>(
&[Token::Bytes(b"hello_world")],
"UUID parsing failed: invalid bytes length: expected 16, found 11",
);
}
}