proto-types 0.1.0

Rust types generated from the google.protobuf and buf.validate protobuf packages, plus extra helpers for implementing validation with the protocheck crate.
Documentation 
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use std::convert::{From, TryFrom};

use chrono::{DateTime, FixedOffset, Utc};

use crate::{Timestamp, TimestampError};

impl From<DateTime<Utc>> for Timestamp {
  fn from(datetime: DateTime<Utc>) -> Self {
    let mut ts = Timestamp {
      seconds: datetime.timestamp(),
      nanos: datetime.timestamp_subsec_nanos() as i32,
    };
    ts.normalize();
    ts
  }
}

impl TryFrom<Timestamp> for DateTime<Utc> {
  type Error = TimestampError;

  fn try_from(mut timestamp: Timestamp) -> Result<Self, Self::Error> {
    timestamp.normalize();

    DateTime::<Utc>::from_timestamp(timestamp.seconds, timestamp.nanos as u32)
      .ok_or(TimestampError::OutOfSystemRange(timestamp))
  }
}

impl TryFrom<Timestamp> for DateTime<FixedOffset> {
  type Error = TimestampError;

  fn try_from(mut timestamp: Timestamp) -> Result<Self, Self::Error> {
    timestamp.normalize();

    let chrono_utc: DateTime<Utc> = timestamp.try_into()?;

    Ok(chrono_utc.into())
  }
}

#[cfg(feature = "totokens")]
mod totokens {
  use proc_macro2::TokenStream;
  use quote::{quote, ToTokens};

  use crate::Timestamp;

  impl ToTokens for Timestamp {
    fn to_tokens(&self, tokens: &mut TokenStream) {
      let seconds = self.seconds;
      let nanos = self.nanos;

      tokens.extend(quote! {
        ::protocheck::types::Timestamp {
          seconds: #seconds,
          nanos: #nanos,
        }
      });
    }
  }
}