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use std::mem::size_of;
use workflow_websocket::client::message::Message as WebSocketMessage;
use crate::asynchronous::client::error::Error;
use borsh::BorshDeserialize;
use workflow_core::enums::u32_try_from;
pub enum Message<'data> {
Request(&'data [u8]),
Post(&'data [u8]),
}
impl<'data> Message<'data> {
fn data(&self) -> &'data [u8] {
match self {
Message::Request(data) => data,
Message::Post(data) => data,
}
}
}
pub fn to_ws_msg(msg : (ReqHeader, Message<'_>)) -> WebSocketMessage {
let (header, message) = msg;
let data = message.data();
let len = data.len() + size_of::<ReqHeader>();
let mut buffer = Vec::with_capacity(len);
unsafe { buffer.set_len(len); }
let dest_header: &mut ReqHeader = unsafe { std::mem::transmute(&mut buffer[0]) };
*dest_header = header;
buffer[size_of::<ReqHeader>()..].copy_from_slice(data);
buffer.into()
}
#[derive(Clone, Copy)]
#[repr(packed)]
pub struct ReqHeader {
pub id : u64,
pub op : u32,
}
#[derive(Clone, Copy)]
#[repr(packed)]
pub struct RespHeader {
pub id : u64,
pub status : u32
}
u32_try_from! {
pub enum RespStatus {
Success = 0,
Error = 1,
}
}
#[derive(Debug)]
pub enum RespError<T>
where
T : BorshDeserialize
{
NoData,
Data(T),
Rpc(Error),
}
#[derive(Debug)]
pub struct ReqMessage<'data> {
pub id : u64,
pub op : u32,
pub data : &'data [u8],
}
impl<'data> TryFrom<&'data Vec<u8>> for ReqMessage<'data> {
type Error = Error;
fn try_from(src: &'data Vec<u8>) -> Result<Self, Self::Error> {
let v : ReqMessage = src[..].try_into()?;
Ok(v)
}
}
impl<'data> TryFrom<&'data [u8]> for ReqMessage<'data> {
type Error = Error;
fn try_from(src: &'data [u8]) -> Result<Self, Self::Error> {
if src.len() < size_of::<ReqHeader>() {
return Err(Error::HeaderSize);
}
let header: &ReqHeader = unsafe { std::mem::transmute(&src[0]) };
let ReqHeader { id, op } = *header;
let data = &src[size_of::<ReqHeader>()..];
let message = ReqMessage {
id,
op,
data
};
Ok(message)
}
}
#[derive(Debug)]
pub struct RespMessage<'data> {
pub id : u64,
pub status : u32,
pub data : &'data [u8],
}
impl<'data> RespMessage<'data> {
pub fn new(id: u64, status: u32, data: &'data [u8]) -> RespMessage<'data> {
RespMessage {
id,
status,
data
}
}
pub fn try_to_vec(&self) -> Result<Vec<u8>, Error> {
let len = size_of::<RespHeader>() + self.data.len();
let mut buffer = Vec::with_capacity(len);
unsafe { buffer.set_len(len); }
let header: &mut RespHeader = unsafe { std::mem::transmute(&mut buffer[0]) };
*header = RespHeader { id : self.id, status : self.status };
if self.data.len() > 0 {
buffer[size_of::<RespHeader>()..].copy_from_slice(&self.data);
}
Ok(buffer)
}
}
impl<'data> TryFrom<&'data [u8]> for RespMessage<'data> {
type Error = Error;
fn try_from(src: &'data [u8]) -> Result<Self, Self::Error> {
if src.len() < size_of::<ReqHeader>() {
return Err(Error::HeaderSize);
}
let header: &RespHeader = unsafe { std::mem::transmute(&src[0]) };
let RespHeader { id, status } = *header;
let data = &src[size_of::<RespHeader>()..];
let message = RespMessage {
id,
status,
data
};
Ok(message)
}
}
