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use super::raw_message::Message;
use async_tungstenite::tungstenite::Message as TungsteniteMessage;
use futures_channel::mpsc::{SendError, TrySendError, UnboundedSender};
use futures_util::sink::Sink;
use std::{
pin::Pin,
task::{Context, Poll},
};
#[derive(Clone, Debug)]
pub struct ShardSink(pub(super) UnboundedSender<TungsteniteMessage>);
impl Sink<Message> for ShardSink {
type Error = SendError;
fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.0.poll_ready(cx)
}
fn start_send(mut self: Pin<&mut Self>, msg: Message) -> Result<(), Self::Error> {
self.0.start_send(msg.into_tungstenite())
}
fn poll_flush(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn poll_close(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.0.disconnect();
Poll::Ready(Ok(()))
}
}
impl Sink<Message> for &ShardSink {
type Error = SendError;
fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.0.poll_ready(cx)
}
fn start_send(self: Pin<&mut Self>, msg: Message) -> Result<(), Self::Error> {
self.0
.unbounded_send(msg.into_tungstenite())
.map_err(TrySendError::into_send_error)
}
fn poll_flush(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn poll_close(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.0.close_channel();
Poll::Ready(Ok(()))
}
}
#[cfg(test)]
mod tests {
use super::{Message, ShardSink};
use futures_util::sink::Sink;
use static_assertions::assert_impl_all;
use std::fmt::Debug;
assert_impl_all!(ShardSink: Clone, Debug, Send, Sink<Message>, Sync);
}