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use crate::context::Context;
use crate::error::Result;
use crate::events::event::Event;
use serde::Serialize;
use std::sync::Arc;
use tokio::io::AsyncWriteExt;
use tokio::net::tcp::OwnedWriteHalf;
use tokio::sync::Mutex;
#[derive(Clone)]
pub struct StreamEmitter {
stream: Arc<Mutex<OwnedWriteHalf>>,
}
impl StreamEmitter {
pub fn new(stream: OwnedWriteHalf) -> Self {
Self {
stream: Arc::new(Mutex::new(stream)),
}
}
pub async fn _emit<T: Serialize>(
&self,
event: &str,
data: T,
res_id: Option<u64>,
) -> Result<EmitMetadata> {
let data_bytes = rmp_serde::to_vec(&data)?;
let event = Event::new(event.to_string(), data_bytes, res_id);
let event_bytes = event.to_bytes()?;
{
let mut stream = self.stream.lock().await;
(*stream).write_all(&event_bytes[..]).await?;
}
Ok(EmitMetadata::new(event.id()))
}
pub async fn emit<T: Serialize>(&self, event: &str, data: T) -> Result<EmitMetadata> {
let metadata = self._emit(event, data, None).await?;
Ok(metadata)
}
pub async fn emit_response<T: Serialize>(
&self,
event_id: u64,
event: &str,
data: T,
) -> Result<EmitMetadata> {
let metadata = self._emit(event, data, Some(event_id)).await?;
Ok(metadata)
}
}
pub struct EmitMetadata {
message_id: u64,
}
impl EmitMetadata {
pub(crate) fn new(message_id: u64) -> Self {
Self { message_id }
}
pub fn message_id(&self) -> u64 {
self.message_id
}
pub async fn await_reply(&self, ctx: &Context) -> Result<Event> {
let reply = ctx.await_reply(self.message_id).await?;
Ok(reply)
}
}