connexa 0.3.2

High level abtraction of rust-libp2p
Documentation 
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use crate::handle::Connexa;
use crate::types::RendezvousCommand;
use bytes::Bytes;
use futures::channel::oneshot;
use libp2p::rendezvous::{Cookie, Namespace};
use libp2p::{Multiaddr, PeerId};
use std::io;

#[derive(Copy, Clone)]
pub struct ConnexaRendezvous<'a, T> {
    connexa: &'a Connexa<T>,
}

impl<'a, T> ConnexaRendezvous<'a, T>
where
    T: Send + Sync + 'static,
{
    pub(crate) fn new(connexa: &'a Connexa<T>) -> Self {
        Self { connexa }
    }

    /// Registers a peer in a namespace with an optional time-to-live (TTL).
    pub async fn register(
        &self,
        peer_id: PeerId,
        namespace: impl IntoNamespace,
        ttl: Option<u64>,
    ) -> io::Result<()> {
        let namespace = namespace.into_namespace()?.ok_or(io::Error::new(
            io::ErrorKind::InvalidInput,
            "namespace is not provided",
        ))?;

        let (tx, rx) = oneshot::channel();
        self.connexa
            .to_task
            .clone()
            .send(
                RendezvousCommand::Register {
                    namespace,
                    peer_id,
                    ttl,
                    resp: tx,
                }
                .into(),
            )
            .await?;

        rx.await.map_err(io::Error::other)?
    }

    /// Unregisters a peer from a namespace.
    pub async fn unregister(
        &self,
        peer_id: PeerId,
        namespace: impl IntoNamespace,
    ) -> io::Result<()> {
        let namespace = namespace.into_namespace()?.ok_or(io::Error::new(
            io::ErrorKind::InvalidInput,
            "namespace is not provided",
        ))?;

        let (tx, rx) = oneshot::channel();
        self.connexa
            .to_task
            .clone()
            .send(
                RendezvousCommand::Unregister {
                    namespace,
                    peer_id,
                    resp: tx,
                }
                .into(),
            )
            .await?;

        rx.await.map_err(io::Error::other)?
    }

    /// Discovers peers in a namespace.
    pub async fn discovery(
        &self,
        peer_id: PeerId,
        namespace: impl IntoNamespace,
        ttl: Option<u64>,
        cookie: Option<Cookie>,
    ) -> io::Result<(Cookie, Vec<(PeerId, Vec<Multiaddr>)>)> {
        let namespace = namespace.into_namespace()?;
        let (tx, rx) = oneshot::channel();
        self.connexa
            .to_task
            .clone()
            .send(
                RendezvousCommand::Discover {
                    namespace,
                    peer_id,
                    cookie,
                    ttl,
                    resp: tx,
                }
                .into(),
            )
            .await?;

        rx.await.map_err(io::Error::other)?
    }
}

pub trait IntoNamespace {
    fn into_namespace(self) -> io::Result<Option<Namespace>>;
}

impl IntoNamespace for String {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Namespace::new(self).map_err(io::Error::other).map(Some)
    }
}

impl IntoNamespace for &String {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Namespace::new(self.clone())
            .map_err(io::Error::other)
            .map(Some)
    }
}

impl IntoNamespace for Namespace {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Ok(Some(self))
    }
}

impl IntoNamespace for &Namespace {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Ok(Some(self.clone()))
    }
}

impl IntoNamespace for &str {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Namespace::new(self.to_string())
            .map_err(io::Error::other)
            .map(Some)
    }
}

impl IntoNamespace for () {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Ok(None)
    }
}

impl IntoNamespace for Vec<u8> {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        let str = String::from_utf8_lossy(&self);
        str.into_namespace()
    }
}

impl IntoNamespace for &[u8] {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        let str = String::from_utf8_lossy(self);
        str.into_namespace()
    }
}

impl IntoNamespace for Bytes {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        let str = String::from_utf8_lossy(&self);
        str.into_namespace()
    }
}

impl IntoNamespace for &Bytes {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        let str = String::from_utf8_lossy(self);
        str.into_namespace()
    }
}

impl<N: IntoNamespace> IntoNamespace for Option<N> {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        match self {
            Some(n) => n.into_namespace(),
            None => Ok(None),
        }
    }
}