86 lines
2.2 KiB
Rust
86 lines
2.2 KiB
Rust
/// https://www.w3.org/TR/did-core/
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use std::fmt;
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use std::str::FromStr;
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use regex::Regex;
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use serde::{de::Error as DeserializerError, Deserialize, Deserializer, Serialize, Serializer};
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use super::did_key::DidKey;
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use super::did_pkh::DidPkh;
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const DID_RE: &str = r"did:(?P<method>\w+):.+";
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#[derive(Clone, Debug, PartialEq)]
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pub enum Did {
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Key(DidKey),
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Pkh(DidPkh),
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}
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#[derive(thiserror::Error, Debug)]
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#[error("DID parse error")]
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pub struct DidParseError;
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impl FromStr for Did {
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type Err = DidParseError;
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fn from_str(value: &str) -> Result<Self, Self::Err> {
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let did_re = Regex::new(DID_RE).unwrap();
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let caps = did_re.captures(value).ok_or(DidParseError)?;
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let did = match &caps["method"] {
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"key" => {
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let did_key = DidKey::from_str(value)?;
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Self::Key(did_key)
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}
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"pkh" => {
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let did_pkh = DidPkh::from_str(value)?;
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Self::Pkh(did_pkh)
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}
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_ => return Err(DidParseError),
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};
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Ok(did)
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}
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}
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impl fmt::Display for Did {
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fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
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let did_str = match self {
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Self::Key(did_key) => did_key.to_string(),
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Self::Pkh(did_pkh) => did_pkh.to_string(),
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};
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write!(formatter, "{}", did_str)
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}
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}
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impl<'de> Deserialize<'de> for Did {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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let did_str: String = Deserialize::deserialize(deserializer)?;
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did_str.parse().map_err(DeserializerError::custom)
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}
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}
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impl Serialize for Did {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where
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S: Serializer,
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{
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let did_str = self.to_string();
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serializer.serialize_str(&did_str)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_did_string_conversion() {
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let did_str = "did:pkh:eip155:1:0xb9c5714089478a327f09197987f16f9e5d936e8a";
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let did: Did = did_str.parse().unwrap();
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assert!(matches!(did, Did::Pkh(_)));
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assert_eq!(did.to_string(), did_str);
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}
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}
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