93 lines
2.1 KiB
Rust
93 lines
2.1 KiB
Rust
use std::{
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io::{Write, Read, ErrorKind},
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marker::Sized,
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path::PathBuf,
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thread,
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time,
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};
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use bytes::BytesMut;
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use utils;
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use models::message::{Message, OpCode};
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use error::{Error, Result};
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/// Wait for a non-blocking connection until it's complete.
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macro_rules! try_until_done {
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[ $e:expr ] => {
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loop {
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match $e {
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Ok(_) => break,
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Err(Error::IoError(ref err)) if err.kind() == ErrorKind::WouldBlock => (),
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Err(why) => return Err(why),
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}
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thread::sleep(time::Duration::from_millis(500));
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}
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}
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}
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pub trait Connection: Sized {
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type Socket: Write + Read;
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fn socket(&mut self) -> &mut Self::Socket;
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fn ipc_path() -> PathBuf;
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fn connect() -> Result<Self>;
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fn socket_path(n: u8) -> PathBuf {
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Self::ipc_path().join(format!("discord-ipc-{}", n))
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}
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fn handshake(&mut self, client_id: u64) -> Result<()> {
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let hs = json![{
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"client_id": client_id.to_string(),
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"v": 1,
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"nonce": utils::nonce()
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}];
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try_until_done!(self.send(Message::new(OpCode::Handshake, hs.clone())));
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try_until_done!(self.recv());
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Ok(())
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}
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fn ping(&mut self) -> Result<OpCode> {
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let message = Message::new(OpCode::Ping, json![{}]);
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self.send(message)?;
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let response = self.recv()?;
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Ok(response.opcode)
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}
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fn send(&mut self, message: Message) -> Result<()> {
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match message.encode() {
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Err(why) => error!("{:?}", why),
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Ok(bytes) => {
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self.socket().write_all(bytes.as_ref())?;
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}
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};
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debug!("-> {:?}", message);
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Ok(())
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}
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fn recv(&mut self) -> Result<Message> {
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let mut buf = BytesMut::new();
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buf.resize(1024, 0);
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let n = self.socket().read(&mut buf)?;
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debug!("Received {} bytes", n);
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if n == 0 {
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return Err(Error::ConnectionClosed);
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}
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buf = buf.split_to(n);
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let message = Message::decode(&buf)?;
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debug!("<- {:?}", message);
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Ok(message)
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}
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}
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