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use crate::{
either::EitherOutput,
protocols_handler::{KeepAlive, ProtocolsHandler, ProtocolsHandlerEvent, ProtocolsHandlerUpgrErr, IntoProtocolsHandler},
swarm::{NetworkBehaviour, NetworkBehaviourAction, NetworkBehaviourEventProcess},
upgrade::{InboundUpgrade, OutboundUpgrade, DeniedUpgrade, EitherUpgrade},
PeerId, Multiaddr, nodes::ConnectedPoint, swarm::PollParameters,
};
use futures::prelude::*;
use std::error;
pub struct Toggle<TBehaviour> {
inner: Option<TBehaviour>,
}
impl<TBehaviour> From<Option<TBehaviour>> for Toggle<TBehaviour> {
fn from(inner: Option<TBehaviour>) -> Self {
Toggle { inner }
}
}
impl<TBehaviour> NetworkBehaviour for Toggle<TBehaviour>
where
TBehaviour: NetworkBehaviour
{
type ProtocolsHandler = ToggleIntoProtoHandler<TBehaviour::ProtocolsHandler>;
type OutEvent = TBehaviour::OutEvent;
fn new_handler(&mut self) -> Self::ProtocolsHandler {
ToggleIntoProtoHandler {
inner: self.inner.as_mut().map(|i| i.new_handler())
}
}
fn addresses_of_peer(&mut self, peer_id: &PeerId) -> Vec<Multiaddr> {
self.inner.as_mut().map(|b| b.addresses_of_peer(peer_id)).unwrap_or_else(Vec::new)
}
fn inject_connected(&mut self, peer_id: PeerId, endpoint: ConnectedPoint) {
if let Some(inner) = self.inner.as_mut() {
inner.inject_connected(peer_id, endpoint)
}
}
fn inject_disconnected(&mut self, peer_id: &PeerId, endpoint: ConnectedPoint) {
if let Some(inner) = self.inner.as_mut() {
inner.inject_disconnected(peer_id, endpoint)
}
}
fn inject_replaced(&mut self, peer_id: PeerId, closed_endpoint: ConnectedPoint, new_endpoint: ConnectedPoint) {
if let Some(inner) = self.inner.as_mut() {
inner.inject_replaced(peer_id, closed_endpoint, new_endpoint)
}
}
fn inject_node_event(
&mut self,
peer_id: PeerId,
event: <<Self::ProtocolsHandler as IntoProtocolsHandler>::Handler as ProtocolsHandler>::OutEvent
) {
if let Some(inner) = self.inner.as_mut() {
inner.inject_node_event(peer_id, event);
}
}
fn inject_addr_reach_failure(&mut self, peer_id: Option<&PeerId>, addr: &Multiaddr, error: &dyn error::Error) {
if let Some(inner) = self.inner.as_mut() {
inner.inject_addr_reach_failure(peer_id, addr, error)
}
}
fn inject_dial_failure(&mut self, peer_id: &PeerId) {
if let Some(inner) = self.inner.as_mut() {
inner.inject_dial_failure(peer_id)
}
}
fn poll(&mut self, params: &mut PollParameters<'_>)
-> Async<NetworkBehaviourAction<<<Self::ProtocolsHandler as IntoProtocolsHandler>::Handler as ProtocolsHandler>::InEvent, Self::OutEvent>>
{
if let Some(inner) = self.inner.as_mut() {
inner.poll(params)
} else {
Async::NotReady
}
}
}
impl<TEvent, TBehaviour> NetworkBehaviourEventProcess<TEvent> for Toggle<TBehaviour>
where
TBehaviour: NetworkBehaviourEventProcess<TEvent>
{
fn inject_event(&mut self, event: TEvent) {
if let Some(inner) = self.inner.as_mut() {
inner.inject_event(event);
}
}
}
pub struct ToggleIntoProtoHandler<TInner> {
inner: Option<TInner>,
}
impl<TInner> IntoProtocolsHandler for ToggleIntoProtoHandler<TInner>
where
TInner: IntoProtocolsHandler
{
type Handler = ToggleProtoHandler<TInner::Handler>;
fn into_handler(self, remote_peer_id: &PeerId) -> Self::Handler {
ToggleProtoHandler {
inner: self.inner.map(|h| h.into_handler(remote_peer_id))
}
}
}
pub struct ToggleProtoHandler<TInner> {
inner: Option<TInner>,
}
impl<TInner> ProtocolsHandler for ToggleProtoHandler<TInner>
where
TInner: ProtocolsHandler,
{
type InEvent = TInner::InEvent;
type OutEvent = TInner::OutEvent;
type Error = TInner::Error;
type Substream = TInner::Substream;
type InboundProtocol = EitherUpgrade<TInner::InboundProtocol, DeniedUpgrade>;
type OutboundProtocol = TInner::OutboundProtocol;
type OutboundOpenInfo = TInner::OutboundOpenInfo;
fn listen_protocol(&self) -> Self::InboundProtocol {
if let Some(inner) = self.inner.as_ref() {
EitherUpgrade::A(inner.listen_protocol())
} else {
EitherUpgrade::B(DeniedUpgrade)
}
}
fn inject_fully_negotiated_inbound(
&mut self,
out: <Self::InboundProtocol as InboundUpgrade<Self::Substream>>::Output
) {
let out = match out {
EitherOutput::First(out) => out,
EitherOutput::Second(v) => void::unreachable(v),
};
self.inner.as_mut().expect("Can't receive an inbound substream if disabled; QED")
.inject_fully_negotiated_inbound(out)
}
fn inject_fully_negotiated_outbound(
&mut self,
out: <Self::OutboundProtocol as OutboundUpgrade<Self::Substream>>::Output,
info: Self::OutboundOpenInfo
) {
self.inner.as_mut().expect("Can't receive an outbound substream if disabled; QED")
.inject_fully_negotiated_outbound(out, info)
}
fn inject_event(&mut self, event: Self::InEvent) {
self.inner.as_mut().expect("Can't receive events if disabled; QED")
.inject_event(event)
}
fn inject_dial_upgrade_error(&mut self, info: Self::OutboundOpenInfo, err: ProtocolsHandlerUpgrErr<<Self::OutboundProtocol as OutboundUpgrade<Self::Substream>>::Error>) {
self.inner.as_mut().expect("Can't receive an outbound substream if disabled; QED")
.inject_dial_upgrade_error(info, err)
}
fn connection_keep_alive(&self) -> KeepAlive {
self.inner.as_ref().map(|h| h.connection_keep_alive())
.unwrap_or(KeepAlive::Now)
}
fn poll(
&mut self,
) -> Poll<
ProtocolsHandlerEvent<Self::OutboundProtocol, Self::OutboundOpenInfo, Self::OutEvent>,
Self::Error,
> {
if let Some(inner) = self.inner.as_mut() {
inner.poll()
} else {
Ok(Async::NotReady)
}
}
}