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//! Implement synchronous views of circuit internals.
use crate::client::circuit::ClientCircSyncView;
/// An object that represents a view of a circuit's internals,
/// usable in a synchronous callback.
pub struct CircSyncView<'a>(CircSyncViewInner<'a>);
impl<'a> CircSyncView<'a> {
/// Create a new client circuit view.
pub(crate) fn new_client(c: ClientCircSyncView<'a>) -> Self {
Self(c.into())
}
/// Create a new relay circuit view.
#[allow(dead_code)] // TODO(relay)
#[cfg(feature = "relay")]
pub(crate) fn new_relay() -> Self {
Self(CircSyncViewInner::Relay( /* TODO(relay) */))
}
}
/// The internal representation of a [`CircSyncView`].
#[derive(derive_more::From)]
pub(crate) enum CircSyncViewInner<'a> {
/// A view of a client circuit's internals.
Client(ClientCircSyncView<'a>),
/// A view of a relay circuit's internals.
#[cfg(feature = "relay")]
#[allow(dead_code)] // TODO(relay)
Relay(/* TODO(relay) */),
}
impl<'a> CircSyncView<'a> {
/// Return the number of streams currently open on this circuit.
pub fn n_open_streams(&self) -> usize {
use CircSyncViewInner::*;
match &self.0 {
Client(c) => c.n_open_streams(),
#[cfg(feature = "relay")]
Relay() => todo!(),
}
}
// TODO: We will eventually want to add more functionality here, but we
// should do so judiciously.
}
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