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use crate::{Prefix, XorName};
use serde::{
de::{self, Visitor},
ser::SerializeStruct,
Deserialize, Deserializer, Serialize, Serializer,
};
use std::{fmt, str::FromStr};
impl Serialize for XorName {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
if serializer.is_human_readable() {
return serializer.serialize_str(&hex::encode(self.0));
}
serializer.serialize_newtype_struct("XorName", &self.0)
}
}
impl<'de> Deserialize<'de> for XorName {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
if deserializer.is_human_readable() {
struct XorNameHexStrVisitor;
impl<'de> Visitor<'de> for XorNameHexStrVisitor {
type Value = XorName;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "32 byte hex string")
}
fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
let buffer = <[u8; 32] as hex::FromHex>::from_hex(s)
.map_err(|e| E::custom(std::format!("hex decoding ({})", e)))?;
Ok(XorName(buffer))
}
}
return deserializer.deserialize_str(XorNameHexStrVisitor);
}
#[derive(Deserialize)]
#[serde(rename = "XorName")]
struct XorNameDerived([u8; 32]);
let x = <XorNameDerived as Deserialize>::deserialize(deserializer)?;
Ok(XorName(x.0))
}
}
impl Serialize for Prefix {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
if serializer.is_human_readable() {
return serializer.serialize_str(&std::format!("{}", self));
}
let mut s = serializer.serialize_struct("Prefix", 2)?;
s.serialize_field("bit_count", &self.bit_count)?;
s.serialize_field("name", &self.name)?;
s.end()
}
}
impl<'de> Deserialize<'de> for Prefix {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
if deserializer.is_human_readable() {
struct PrefixVisitor;
impl<'de> Visitor<'de> for PrefixVisitor {
type Value = Prefix;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "binary formatted string")
}
fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
Prefix::from_str(s).map_err(|e| {
E::custom(std::format!("could not convert string to `Prefix`: {e}"))
})
}
}
return deserializer.deserialize_str(PrefixVisitor);
}
#[derive(Deserialize)]
#[serde(rename = "Prefix")]
struct PrefixDerived {
bit_count: u16,
name: XorName,
}
let p = <PrefixDerived as Deserialize>::deserialize(deserializer)?;
Ok(Prefix {
bit_count: p.bit_count,
name: p.name,
})
}
}
#[cfg(test)]
mod test {
use super::*;
use serde_test::*;
#[derive(PartialEq, Debug, serde::Serialize, Deserialize)]
struct XorNameDerived([u8; 32]);
#[derive(PartialEq, Debug, serde::Serialize, Deserialize)]
struct PrefixDerived {
bit_count: u16,
name: XorNameDerived,
}
#[test]
fn xorname_ser_de() {
let xor = XorName([0xAA; 32]);
let xor_derived = XorNameDerived([0xAA; 32]);
let xor_hex_str = static_str("aa".repeat(32));
assert_tokens(&xor.readable(), &[Token::Str(xor_hex_str)]);
assert_tokens(&xor.compact(), &xor_tokens("XorName"));
assert_tokens(&xor_derived.compact(), &xor_tokens("XorNameDerived"));
}
#[test]
fn prefix_ser_de() {
let bit_count = 15;
let prefix = Prefix {
bit_count,
name: XorName([0xAA; 32]),
};
let prefix_derived = PrefixDerived {
bit_count,
name: XorNameDerived([0xAA; 32]),
};
assert_tokens(&prefix.readable(), &[Token::Str("101010101010101")]);
assert_tokens(
&prefix.compact(),
&prefix_tokens(bit_count, "Prefix", "XorName"),
);
assert_tokens(
&prefix_derived.compact(),
&prefix_tokens(bit_count, "PrefixDerived", "XorNameDerived"),
);
}
fn static_str(s: String) -> &'static str {
Box::leak(s.into_boxed_str())
}
fn xor_tokens(name: &'static str) -> Vec<Token> {
let mut a = vec![];
a.extend_from_slice(&[Token::NewtypeStruct { name }, Token::Tuple { len: 32 }]);
a.extend_from_slice(&[Token::U8(0xAA); 32]);
a.extend_from_slice(&[Token::TupleEnd]);
a
}
fn prefix_tokens(bit_count: u16, name: &'static str, name2: &'static str) -> Vec<Token> {
let mut v = vec![
Token::Struct { name, len: 2 },
Token::Str("bit_count"),
Token::U16(bit_count),
Token::Str("name"),
];
v.extend_from_slice(&xor_tokens(name2));
v.extend_from_slice(&[Token::StructEnd]);
v
}
}