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use crate::message::{Error, FromBytes, Message, WriteTo};

use std::io::Write;

pub struct Buffer;

impl<'a> FromBytes<'a> for Buffer {

    type Output = &'a [u8];

    fn from_bytes(slice: &'a [u8]) -> Result<Message<Self::Output>, Error> {

        Ok(Message::new(slice.len(), slice))

    }

}

impl WriteTo for Buffer {

    type Input<'a> = &'a [u8];

    fn write_to<W: Write>(input: &Self::Input<'_>, mut out: W) -> Result<(), Error> {

        out.write_all(input)?;

        Ok(())

    }

}

#[cfg(feature = "tokio")]

impl crate::message::WriteToAsync for Buffer {

    async fn write_to_async<W: tokio::io::AsyncWriteExt + Unpin>(

        input: &Self::Input<'_>,

        mut out: W,

    ) -> Result<(), Error> {

        out.write_all(input).await?;

        Ok(())

    }

}