#![allow(clippy::collapsible_if)]

pub mod config;

pub mod filter;

pub mod message;

pub mod session;

pub mod tracking;

pub use crate::service::session::Session;

use self::gossip::Gossip;

use self::message::InventoryAnnouncement;

use self::tracking::NamespacesError;

/// Target number of peers to maintain connections to.

    sessions: Sessions,

    /// Clock. Tells the time.

    clock: LocalTime,

    /// Source of entropy.

    rng: Rng,

    /// Fetch requests initiated by user, which are waiting for results.

            clock,

            routing,

            gossip: Gossip::default(),

            sessions,

            fetch_reqs: HashMap::new(),

            filter: Filter::empty(),

    /// Return the next i/o action to execute.

    #[allow(clippy::should_implement_trait)]

    }

    /// Track a repository.

        Events::from(self.emitter.subscribe())

    }

    }

    /// Lookup a project, both locally and in the routing table.

                .filter_map(|t| (t.policy == tracking::Policy::Track).then_some(t.id)),

        );

        // Start periodic tasks.

        Ok(())

    }

            self.keep_alive(&now);

            self.disconnect_unresponsive_peers(&now);

            self.maintain_connections();

            self.last_idle = now;

        }

        if now - self.last_sync >= SYNC_INTERVAL {

            if let Err(e) = self.fetch_missing_inventory() {

                error!(target: "service", "Error fetching missing inventory: {e}");

            }

            self.last_sync = now;

        }

        if now - self.last_announce >= ANNOUNCE_INTERVAL {

            {

                error!(target: "service", "Error announcing inventory: {}", err);

            }

            self.last_announce = now;

        }

        if now - self.last_prune >= PRUNE_INTERVAL {

            if let Err(err) = self.prune_routing_entries(&now) {

                error!("Error pruning routing entries: {}", err);

            }

            self.last_prune = now;

        }

                self.connect(nid, addr);

            }

            Command::Disconnect(nid) => {

            }

            Command::Seeds(rid, resp) => match self.seeds(&rid) {

                Ok(seeds) => {

                resp.send(tracked).ok();

                // Let all our peers know that we're interested in this repo from now on.

                    Message::subscribe(self.filter(), self.time(), Timestamp::MAX),

                    self.sessions.connected().map(|(_, s)| s),

                );

                match self.tracking.namespaces_for(&self.storage, &rid) {

                    Ok(namespaces) => {

                    }

                    Err(err) => {

                        error!(target: "service", "Error getting namespaces for {rid}: {err}");

                // For now, we only disconnect the remote in case of timeout. In the future,

                // there may be other reasons to disconnect.

                if err.is_timeout() {

                }

                FetchResult::Failed { reason }

            }

        if link.is_outbound() {

            if let Some(peer) = self.sessions.get_mut(&remote) {

                let attempted = peer.to_connected(self.clock);

                if let Err(e) = self.addresses.connected(&remote, &attempted, self.time()) {

                    error!(target: "service", "Error updating address book with connection: {e}");

                        self.clock,

                        self.config.limits.clone(),

                    ));

                }

            }

        }

            debug!(target: "service", "Reconnecting to {remote} in {delay}..");

        } else {

            self.sessions.remove(&remote);

            // Only re-attempt outbound connections, since we don't care if an inbound connection

            Err(err) => {

                // If there's an error, stop processing messages from this peer.

                // However, we still relay messages returned up to this point.

                    .disconnect(remote, DisconnectReason::Session(err));

                // FIXME: The peer should be set in a state such that we don't

                        .filter(|(id, _)| *id != remote && *id != &announcer)

                        .map(|(_, p)| p);

                    return Ok(());

                }

                    // Don't send announcements authored by the remote, back to the remote.

                    .filter(|ann| &ann.node != remote)

                {

                }

                peer.subscribe = Some(subscribe);

            }

                if ponglen > Ping::MAX_PONG_ZEROES {

                    return Ok(());

                }

                    peer,

                    Message::Pong {

                        zeroes: ZeroBytes::new(ponglen),

        });

        let ann = msg.signed(&self.signer);

        Ok(())

    }

    fn reconnect(&mut self, nid: NodeId, addr: Address) -> bool {

        if let Some(sess) = self.sessions.get_mut(&nid) {

            sess.to_initial();

            return true;

        }

                self.config.limits.clone(),

            ),

        );

        true

    }

        let time = self.time();

        let inv = Message::inventory(gossip::inventory(time, inventory), &self.signer);

        for (_, sess) in self.sessions.connected() {

        }

        Ok(())

    }

            .filter(|(_, session)| *now - session.last_active >= STALE_CONNECTION_TIMEOUT);

        for (_, session) in stale {

                session.id,

                DisconnectReason::Session(session::Error::Timeout),

            );

            .filter(|(_, session)| *now - session.last_active >= KEEP_ALIVE_DELTA)

            .map(|(_, session)| session);

        for session in inactive_sessions {

        }

    }

    /// Maintain persistent peer connections.

    fn maintain_persistent(&mut self) {

        let now = self.local_time();

        let mut reconnect = Vec::new();

use crate::service::config::Limits;

use crate::service::message;

use crate::service::message::Message;

use crate::Link;

#[derive(Debug, Copy, Clone, Default, PartialEq, Eq)]

        }

    }

        if let State::Connected { ping, .. } = &mut self.state {

            let msg = message::Ping::new(&mut self.rng);

            *ping = PingState::AwaitingResponse(msg.ponglen);

use crate::prelude::*;

use crate::runtime::Emitter;

use crate::service;

use crate::service::message::*;

use crate::service::tracking::{Policy, Scope};

use crate::service::*;

use crate::storage::git::transport::remote;

    pub fn messages(&mut self, remote: NodeId) -> impl Iterator<Item = Message> {

        let mut msgs = Vec::new();

            Io::Write(a, messages) if *a == remote => {

                msgs.extend(messages.clone());

                false

    /// Get a draining iterator over the peer's I/O outbox.

    pub fn outbox(&mut self) -> impl Iterator<Item = Io> + '_ {

    }

    /// Get a draining iterator over the peer's I/O outbox, which only returns fetches.

    pub fn fetches(&mut self) -> impl Iterator<Item = (Id, NodeId, Namespaces)> + '_ {

            if let Io::Fetch {

                rid,

                remote,

use crate::crypto::Signer;

use crate::git::raw as git;

use crate::prelude::{Address, Id};

use crate::service::{DisconnectReason, Event, Message, NodeId};

use crate::storage::{Namespaces, RefUpdate};

use crate::storage::{WriteRepository, WriteStorage};

use crate::prelude::{LocalDuration, Timestamp};

use crate::service::config::*;

use crate::service::filter::Filter;

use crate::service::message::*;

use crate::service::ServiceState as _;

use crate::service::*;

use crate::storage::git::transport::{local, remote};

use crate::crypto::Signer;

use crate::prelude::Deserializer;

use crate::service::{session, DisconnectReason, Service};

use crate::wire::frame;

use crate::wire::frame::{Frame, FrameData, StreamId};