89 lines
2.5 KiB
Rust
89 lines
2.5 KiB
Rust
// Copyright © 2019-2020 The Radicle Foundation <hello@radicle.foundation>
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use metadata::commit::trailers::{OwnedTrailer, Token, Trailer};
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use std::ops::Deref as _;
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pub mod error {
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use thiserror::Error;
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#[derive(Debug, Error)]
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pub enum InvalidResourceTrailer {
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#[error("found wrong token for Rad-Resource tailer")]
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WrongToken,
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#[error("no value for Rad-Resource")]
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NoValue,
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/// Invalid object ID.
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#[error("invalid oid: {0}")]
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InvalidOid(#[from] radicle_oid::str::ParseOidError),
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}
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}
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/// Commit trailer for COB commits.
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pub enum CommitTrailer {
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/// Points to the owning resource.
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Resource(oid::Oid),
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/// Points to a related change.
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Related(oid::Oid),
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}
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impl CommitTrailer {
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pub fn oid(&self) -> oid::Oid {
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match self {
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Self::Resource(oid) => *oid,
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Self::Related(oid) => *oid,
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}
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}
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}
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impl TryFrom<&Trailer<'_>> for CommitTrailer {
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type Error = error::InvalidResourceTrailer;
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fn try_from(Trailer { value, token }: &Trailer<'_>) -> Result<Self, Self::Error> {
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let oid = value.as_ref().parse::<oid::Oid>()?;
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if token.deref() == "Rad-Resource" {
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Ok(CommitTrailer::Resource(oid))
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} else if token.deref() == "Rad-Related" {
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Ok(CommitTrailer::Related(oid))
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} else {
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Err(Self::Error::WrongToken)
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}
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}
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}
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impl TryFrom<&OwnedTrailer> for CommitTrailer {
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type Error = error::InvalidResourceTrailer;
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fn try_from(trailer: &OwnedTrailer) -> Result<Self, Self::Error> {
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Self::try_from(&Trailer::from(trailer))
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}
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}
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impl From<CommitTrailer> for Trailer<'_> {
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fn from(t: CommitTrailer) -> Self {
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match t {
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#[allow(clippy::unwrap_used)]
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CommitTrailer::Related(oid) => {
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Trailer {
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// SAFETY: "Rad-Related" is a valid `Token`.
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token: Token::try_from("Rad-Related").unwrap(),
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value: oid.to_string().into(),
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}
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}
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#[allow(clippy::unwrap_used)]
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CommitTrailer::Resource(oid) => {
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Trailer {
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// SAFETY: "Rad-Resource" is a valid `Token`.
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token: Token::try_from("Rad-Resource").unwrap(),
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value: oid.to_string().into(),
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}
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}
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}
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}
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}
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impl From<CommitTrailer> for OwnedTrailer {
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fn from(containing: CommitTrailer) -> Self {
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Trailer::from(containing).to_owned()
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}
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}
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