naia-server 0.24.0

A server that uses either UDP or WebRTC communication to send/receive messages to/from connected clients, and syncs registered Entities/Components to clients to whom they are in-scope.
Documentation 
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use std::net::SocketAddr;

use naia_shared::{link_condition_logic, Instant, LinkConditionerConfig, TimeQueue};

use super::{PacketReceiver, RecvError};
use crate::transport::udp::UdpPacketReceiver;

/// Used to receive packets from the Client Socket
#[derive(Clone)]
pub struct ConditionedPacketReceiver {
    inner_receiver: UdpPacketReceiver,
    link_conditioner_config: LinkConditionerConfig,
    time_queue: TimeQueue<(SocketAddr, Box<[u8]>)>,
    last_payload: Option<Box<[u8]>>,
}

impl ConditionedPacketReceiver {
    /// Creates a new ConditionedPacketReceiver
    pub fn new(
        inner_receiver: UdpPacketReceiver,
        link_conditioner_config: &LinkConditionerConfig,
    ) -> Self {
        Self {
            inner_receiver,
            link_conditioner_config: link_conditioner_config.clone(),
            time_queue: TimeQueue::new(),
            last_payload: None,
        }
    }
}

impl PacketReceiver for ConditionedPacketReceiver {
    fn receive(&mut self) -> Result<Option<(SocketAddr, &[u8])>, RecvError> {
        loop {
            match self.inner_receiver.receive() {
                Ok(option) => match option {
                    None => {
                        break;
                    }
                    Some((addr, buffer)) => {
                        link_condition_logic::process_packet(
                            &self.link_conditioner_config,
                            &mut self.time_queue,
                            (addr, buffer.into()),
                        );
                    }
                },
                Err(err) => {
                    return Err(err);
                }
            }
        }

        let now = Instant::now();
        if self.time_queue.has_item(&now) {
            let (address, payload) = self.time_queue.pop_item(&now).unwrap();
            self.last_payload = Some(payload);
            return Ok(Some((address, self.last_payload.as_ref().unwrap())));
        } else {
            Ok(None)
        }
    }
}