logimesh 0.1.9

logimesh is a Rust RPC Microservice 2.0 framework.
Documentation 
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// Copyright Andeya Lee 2024
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT.
//! A client stbu config.

pub use ::tokio_serde::formats::*;
use ::tokio_serde::{Deserializer, Serializer};
use bytes::{Bytes, BytesMut};
use serde::{Deserialize, Serialize};
use std::pin::Pin;
use std::sync::Arc;

/// Transport serde codec
#[derive(Debug, Clone, Copy)]
pub enum Codec {
    /// Bincode codec using [bincode](https://docs.rs/bincode) crate.
    Bincode,
    /// JSON codec using [serde_json](https://docs.rs/serde_json) crate.
    Json,
    /// MessagePack codec using [rmp-serde](https://docs.rs/rmp-serde) crate.
    #[cfg(feature = "serde-transport-messagepack")]
    MessagePack,
    /// CBOR codec using [serde_cbor](https://docs.rs/serde_cbor) crate.
    #[cfg(feature = "serde-transport-cbor")]
    Cbor,
}

impl Default for Codec {
    fn default() -> Self {
        Codec::Bincode
    }
}

/// Transport serde codec function
#[derive(Debug)]
pub enum CodecFn<Item, SinkItem> {
    /// Bincode codec using [bincode](https://docs.rs/bincode) crate.
    Bincode(Arc<Bincode<Item, SinkItem>>),
    /// JSON codec using [serde_json](https://docs.rs/serde_json) crate.
    Json(Arc<Json<Item, SinkItem>>),
    /// MessagePack codec using [rmp-serde](https://docs.rs/rmp-serde) crate.
    #[cfg(feature = "serde-transport-messagepack")]
    MessagePack(Arc<MessagePack<Item, SinkItem>>),
    /// CBOR codec using [serde_cbor](https://docs.rs/serde_cbor) crate.
    #[cfg(feature = "serde-transport-cbor")]
    Cbor(Arc<Cbor<Item, SinkItem>>),
}

impl<Item, SinkItem> Clone for CodecFn<Item, SinkItem> {
    fn clone(&self) -> Self {
        match self {
            Self::Bincode(arg0) => Self::Bincode(arg0.clone()),
            Self::Json(arg0) => Self::Json(arg0.clone()),
            #[cfg(feature = "serde-transport-messagepack")]
            Self::MessagePack(arg0) => Self::MessagePack(arg0.clone()),
            #[cfg(feature = "serde-transport-cbor")]
            Self::Cbor(arg0) => Self::Cbor(arg0.clone()),
        }
    }
}

impl<Item, SinkItem> Default for CodecFn<Item, SinkItem> {
    fn default() -> Self {
        CodecFn::Bincode(Arc::new(Bincode::default()))
    }
}

impl Codec {
    /// Returns the corresponding serde codec functions.
    pub fn to_fn<Item, SinkItem>(&self) -> CodecFn<Item, SinkItem> {
        match self {
            Self::Bincode => {
                // Bincode codec using [bincode](https://docs.rs/bincode) crate.
                CodecFn::Bincode(Arc::new(Bincode::default()))
            },
            Self::Json => {
                // JSON codec using [serde_json](https://docs.rs/serde_json) crate.
                CodecFn::Json(Arc::new(Json::default()))
            },
            #[cfg(feature = "serde-transport-messagepack")]
            Self::MessagePack => {
                // MessagePack codec using [rmp-serde](https://docs.rs/rmp-serde) crate.
                CodecFn::MessagePack(Arc::new(MessagePack::default()))
            },
            #[cfg(feature = "serde-transport-cbor")]
            Self::Cbor => {
                // CBOR codec using [serde_cbor](https://docs.rs/serde_cbor) crate.
                CodecFn::Cbor(Arc::new(Cbor::default()))
            },
        }
    }
}

impl<Item, SinkItem> From<Codec> for CodecFn<Item, SinkItem> {
    fn from(value: Codec) -> Self {
        value.to_fn()
    }
}

impl<Item, SinkItem> Deserializer<Item> for CodecFn<Item, SinkItem>
where
    for<'a> Item: Deserialize<'a>,
{
    type Error = std::io::Error;

    fn deserialize(self: Pin<&mut Self>, src: &BytesMut) -> Result<Item, Self::Error> {
        match self.get_mut() {
            CodecFn::Bincode(c) => Ok(unsafe { Pin::new_unchecked(Arc::get_mut_unchecked(c)) }.deserialize(src)?),
            CodecFn::Json(c) => Ok(unsafe { Pin::new_unchecked(Arc::get_mut_unchecked(c)) }.deserialize(src)?),
            #[cfg(feature = "serde-transport-messagepack")]
            CodecFn::MessagePack(c) => Ok(unsafe { Pin::new_unchecked(Arc::get_mut_unchecked(c)) }.deserialize(src)?),
            #[cfg(feature = "serde-transport-cbor")]
            CodecFn::Cbor(c) => Ok(unsafe { Pin::new_unchecked(Arc::get_mut_unchecked(c)) }.deserialize(src)?),
        }
    }
}

impl<Item, SinkItem> Serializer<SinkItem> for CodecFn<Item, SinkItem>
where
    SinkItem: Serialize,
{
    type Error = std::io::Error;

    fn serialize(self: Pin<&mut Self>, item: &SinkItem) -> Result<Bytes, Self::Error> {
        match self.get_mut() {
            CodecFn::Bincode(c) => Ok(unsafe { Pin::new_unchecked(Arc::get_mut_unchecked(c)) }.serialize(item)?),
            CodecFn::Json(c) => Ok(unsafe { Pin::new_unchecked(Arc::get_mut_unchecked(c)) }.serialize(item)?),
            #[cfg(feature = "serde-transport-messagepack")]
            CodecFn::MessagePack(c) => Ok(unsafe { Pin::new_unchecked(Arc::get_mut_unchecked(c)) }.serialize(item)?),
            #[cfg(feature = "serde-transport-cbor")]
            CodecFn::Cbor(c) => Ok(unsafe { Pin::new_unchecked(Arc::get_mut_unchecked(c)) }.serialize(item)?),
        }
    }
}

impl<Item, SinkItem> FnOnce<()> for CodecFn<Item, SinkItem> {
    type Output = Self;
    extern "rust-call" fn call_once(self, _: ()) -> Self::Output {
        self
    }
}

impl<Item, SinkItem> FnMut<()> for CodecFn<Item, SinkItem> {
    extern "rust-call" fn call_mut(&mut self, _: ()) -> Self::Output {
        self.clone()
    }
}

impl<Item, SinkItem> Fn<()> for CodecFn<Item, SinkItem> {
    extern "rust-call" fn call(&self, _: ()) -> Self::Output {
        self.clone()
    }
}