rings-core 0.3.0

Chord DHT implementation with ICE
Documentation 
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use std::str::FromStr;

use async_trait::async_trait;
use rings_transport::core::callback::Callback;
use rings_transport::core::transport::WebrtcConnectionState;

use crate::channels::Channel;
use crate::dht::Did;
use crate::types::channel::Channel as ChannelTrait;
use crate::types::channel::TransportEvent;

type TransportEventSender = <Channel<TransportEvent> as ChannelTrait<TransportEvent>>::Sender;

pub struct SwarmCallback {
    transport_event_sender: TransportEventSender,
}

impl SwarmCallback {
    pub fn new(transport_event_sender: TransportEventSender) -> Self {
        Self {
            transport_event_sender,
        }
    }
}

#[cfg_attr(feature = "wasm", async_trait(?Send))]
#[cfg_attr(not(feature = "wasm"), async_trait)]
impl Callback for SwarmCallback {
    async fn on_message(&self, _cid: &str, msg: &[u8]) -> Result<(), Box<dyn std::error::Error>> {
        Channel::send(
            &self.transport_event_sender,
            TransportEvent::DataChannelMessage(msg.into()),
        )
        .await
        .map_err(|e| e.into())
    }

    async fn on_peer_connection_state_change(
        &self,
        cid: &str,
        s: WebrtcConnectionState,
    ) -> Result<(), Box<dyn std::error::Error>> {
        let Ok(did) = Did::from_str(cid) else {
            tracing::warn!("on_peer_connection_state_change parse did failed: {}", cid);
            return Ok(());
        };

        match s {
            WebrtcConnectionState::Connected => {
                Channel::send(&self.transport_event_sender, TransportEvent::Connected(did)).await
            }
            WebrtcConnectionState::Failed
            | WebrtcConnectionState::Disconnected
            | WebrtcConnectionState::Closed => {
                Channel::send(&self.transport_event_sender, TransportEvent::Closed(did)).await
            }
            _ => Ok(()),
        }
        .map_err(|e| e.into())
    }
}