proto-types 0.2.2

// Parts of the code in this file have been extracted from (prost-types)[https://github.com/tokio-rs/prost/blob/master/prost-types/src/any.rs], licensed under the Apache-2.0 license.
use super::*;
use crate::constants::PACKAGE_PREFIX;

impl Any {
	/// Serialize the given message type `M` as [`Any`].
	pub fn from_msg<M>(msg: &M) -> Result<Self, EncodeError>
	where
		M: Name,
	{
		let type_url = M::type_url();

		let mut value = Vec::new();

		Message::encode(msg, &mut value)?;

		Ok(Self { type_url, value })
	}

	/// Decode the given message type `M` from [`Any`], validating that it has
	/// the expected type URL.
	pub fn to_msg<M>(&self) -> Result<M, DecodeError>
	where
		M: Default + Name + Sized,
	{
		let expected_type_url = M::type_url();

		if let (Some(expected), Some(actual)) = (
			TypeUrl::new(&expected_type_url),
			TypeUrl::new(&self.type_url),
		) && expected == actual
		{
			return M::decode(self.value.as_slice());
		}

		#[allow(deprecated)]
		let mut err = DecodeError::new(format!(
			"expected type URL: \"{}\" (got: \"{}\")",
			expected_type_url, &self.type_url
		));

		err.push("unexpected type URL", "type_url");

		Err(err)
	}
}

impl Name for Any {
	const PACKAGE: &'static str = PACKAGE_PREFIX;

	const NAME: &'static str = "Any";

	fn type_url() -> String {
		type_url_for::<Self>()
	}
}