feat(data): pulse sender registry

src/nodes/data.rs

@@ -0,0 +1,46 @@
+use super::core::Node;
+use crate::core::eventloop::EventLoop;
+use anyhow::{ensure, Result};
+use rccell::RcCell;
+use std::sync::{Arc, RwLock, Weak};
+
+pub struct PulseSender {
+	event_loop: Weak<EventLoop>,
+	registry_idx: RwLock<Option<usize>>,
+}
+
+impl PulseSender {
+	pub fn add_to(node: &RcCell<Node>) -> Result<()> {
+		ensure!(
+			node.borrow().spatial.is_some(),
+			"Node does not have a spatial attached!"
+		);
+
+		let sender = Arc::new(PulseSender {
+			event_loop: node.borrow().get_client().map_or(Weak::new(), |client| {
+				Arc::downgrade(&client.get_event_loop())
+			}),
+			registry_idx: RwLock::new(None),
+		});
+		let idx = sender
+			.event_loop
+			.upgrade()
+			.and_then(|event_loop| event_loop.pulse_senders.add(sender.clone()).ok());
+		*sender.registry_idx.write().unwrap() = idx;
+		Ok(())
+	}
+}
+
+impl Drop for PulseSender {
+	fn drop(&mut self) {
+		let event_loop = self.event_loop.upgrade();
+		let idx = self
+			.registry_idx
+			.write()
+			.ok()
+			.and_then(|registry_idx| registry_idx.clone());
+		event_loop
+			.zip(idx)
+			.and_then(|(event_loop, idx)| event_loop.pulse_senders.remove(idx).ok());
+	}
+}