70 lines
2.0 KiB
Rust
70 lines
2.0 KiB
Rust
use once_cell::sync::Lazy;
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use std::{
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collections::HashMap,
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sync::atomic::{AtomicUsize, Ordering},
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};
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use futures::{SinkExt, StreamExt, TryFutureExt};
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use tokio::sync::{
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mpsc::{self, UnboundedSender},
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RwLock,
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};
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use tokio_stream::wrappers::UnboundedReceiverStream;
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use serde::{Deserialize, Serialize};
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use uuid::Uuid;
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use warp::ws::{Message, WebSocket};
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static CONNECTED_VIEWERS: Lazy<RwLock<HashMap<usize, ConnectedViewer>>> =
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Lazy::new(|| RwLock::new(HashMap::new()));
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static NEXT_VIEWER_ID: AtomicUsize = AtomicUsize::new(1);
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#[derive(Clone, Serialize, Deserialize)]
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#[serde(tag = "op", content = "data")]
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pub enum WatchEvent {
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SetPlaying { playing: bool, time: u64 },
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SetTime(u64),
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}
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pub struct ConnectedViewer {
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pub session_uuid: Uuid,
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pub tx: UnboundedSender<WatchEvent>,
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}
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pub async fn ws_subscribe(session_uuid: Uuid, ws: WebSocket) {
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let viewer_id = NEXT_VIEWER_ID.fetch_add(1, Ordering::Relaxed);
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let (mut viewer_ws_tx, mut viewer_ws_rx) = ws.split();
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let (tx, rx) = mpsc::unbounded_channel::<WatchEvent>();
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let mut rx = UnboundedReceiverStream::new(rx);
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tokio::task::spawn(async move {
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while let Some(event) = rx.next().await {
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viewer_ws_tx
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.send(Message::text(
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serde_json::to_string(&event).expect("couldn't convert WatchEvent into JSON"),
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))
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.unwrap_or_else(|e| eprintln!("ws send error: {}", e))
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.await;
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}
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});
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CONNECTED_VIEWERS
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.write()
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.await
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.insert(viewer_id, ConnectedViewer { session_uuid, tx });
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while let Some(Ok(_)) = viewer_ws_rx.next().await {}
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CONNECTED_VIEWERS.write().await.remove(&viewer_id);
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}
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pub async fn ws_publish(session_uuid: Uuid, event: WatchEvent) {
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for viewer in CONNECTED_VIEWERS.read().await.values() {
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if viewer.session_uuid != session_uuid {
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continue;
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}
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let _ = viewer.tx.send(event.clone());
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}
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}
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