hbkr-rs 0.3.2

Hashblock Key Rotation
Documentation 
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//! HBKR Identifier Prefix

use std::str::FromStr;

use serde::{Deserialize, Deserializer, Serialize, Serializer};

use crate::{
    basicpre::BasicPrefix, errors::KrError, said::SelfAddressingPrefix,
    self_signing_pre::SelfSigningPrefix, Prefix,
};

#[derive(Debug, PartialEq, Clone)]
pub enum IdentifierPrefix {
    Basic(BasicPrefix),
    SelfAddressing(SelfAddressingPrefix),
    SelfSigning(SelfSigningPrefix),
}

impl FromStr for IdentifierPrefix {
    type Err = KrError;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match BasicPrefix::from_str(s) {
            Ok(bp) => Ok(Self::Basic(bp)),
            Err(_) => match SelfAddressingPrefix::from_str(s) {
                Ok(sa) => Ok(Self::SelfAddressing(sa)),
                Err(_) => Ok(Self::SelfSigning(SelfSigningPrefix::from_str(s)?)),
            },
        }
    }
}

impl Prefix for IdentifierPrefix {
    fn derivative(&self) -> Vec<u8> {
        match self {
            Self::Basic(bp) => bp.derivative(),
            Self::SelfAddressing(sap) => sap.derivative(),
            Self::SelfSigning(ssp) => ssp.derivative(),
        }
    }
    fn derivation_code(&self) -> String {
        match self {
            Self::Basic(bp) => bp.derivation_code(),
            Self::SelfAddressing(sap) => sap.derivation_code(),
            Self::SelfSigning(ssp) => ssp.derivation_code(),
        }
    }
}

/// Serde compatible Serialize
impl Serialize for IdentifierPrefix {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_str(&self.to_str())
    }
}

/// Serde compatible Deserialize
impl<'de> Deserialize<'de> for IdentifierPrefix {
    fn deserialize<D>(deserializer: D) -> Result<IdentifierPrefix, D::Error>
    where
        D: Deserializer<'de>,
    {
        let s = String::deserialize(deserializer)?;

        IdentifierPrefix::from_str(&s).map_err(serde::de::Error::custom)
    }
}
impl Default for IdentifierPrefix {
    fn default() -> Self {
        IdentifierPrefix::SelfAddressing(SelfAddressingPrefix::default())
    }
}