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|
use std::io::{
self,
Write,
Read,
BufRead,
BufReader,
};
use std::net::TcpStream;
use std::borrow::Cow;
use message::Message;
use command::Command;
use command::Command::*;
use reply::Reply;
use event::Event;
use ::{ DEBUG, Result, IrscError };
#[cfg(feature = "ssl")]
use openssl::ssl::{ Ssl, SslContext, SslMethod, SslStream };
/// Yes, I don't like the name either, but it's private, so...
enum StreamKind {
Plain(TcpStream),
#[cfg(feature = "ssl")]
Ssl(SslStream<TcpStream>)
}
impl Write for StreamKind {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
match *self {
StreamKind::Plain(ref mut s) => s.write(buf),
#[cfg(feature = "ssl")]
StreamKind::Ssl(ref mut s) => s.write(buf)
}
}
fn flush(&mut self) -> io::Result<()> {
match *self {
StreamKind::Plain(ref mut s) => s.flush(),
#[cfg(feature = "ssl")]
StreamKind::Ssl(ref mut s) => s.flush()
}
}
}
impl Read for StreamKind {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
match *self {
StreamKind::Plain(ref mut s) => s.read(buf),
#[cfg(feature = "ssl")]
StreamKind::Ssl(ref mut s) => s.read(buf)
}
}
}
pub struct Client {
stream: Option<StreamKind>
}
impl Client {
pub fn new() -> Client {
Client {
stream: None
}
}
fn handle_event(&mut self, msg: &Message) {
let _ = match Command::from_message(msg) {
Some(PING(s1, s2)) => self.send(PONG(s1, s2)),
_ => Result(Ok(()))
};
}
pub fn connect(&mut self, host: &str, port: u16) -> Result<()> {
let s = &mut self.stream;
if s.is_some() { return Result(Err(IrscError::AlreadyConnected)) }
*s = match TcpStream::connect((host, port)) {
Ok(tcp) => Some(StreamKind::Plain(tcp)),
Err(e) => return Result(Err(IrscError::Io(e)))
};
Result(Ok(()))
}
#[cfg(feature = "ssl")]
pub fn connect_ssl(&mut self, host: &str, port: u16, ssl: Ssl) -> Result<()> {
let s = &mut self.stream;
if s.is_some() { return Result(Err(IrscError::AlreadyConnected)) };
let tcp_stream = match TcpStream::connect((host, port)) {
Ok(tcp) => Some(tcp),
Err(e) => return Result(Err(IrscError::Io(e)))
};
match tcp_stream.map(|tcp| SslStream::new_from(ssl, tcp)) {
Some(Ok(ssl_stream)) => {
*s = Some(StreamKind::Ssl(ssl_stream));
Result(Ok(()))
},
Some(Err(ssl_error)) => Result(Err(IrscError::Ssl(ssl_error))),
None => Result(Err(IrscError::NotConnected))
}
}
#[inline]
fn send_raw(&mut self, s: &str) -> Result<()> {
info!(">> {}", s);
if DEBUG && s.len() > 512 {
panic!("Message too long, kittens will die if this runs in release mode. Msg: {}", s)
}
Result(self.stream.as_mut()
.ok_or(IrscError::NotConnected)
.and_then(|mut stream| stream.write_all(s.as_bytes())
.and_then(|_| stream.flush())
.map_err(IrscError::Io)))
}
pub fn send_message(&mut self, msg: Message) -> Result<()> {
self.send_raw(&msg.to_string())
}
pub fn send(&mut self, cmd: Command) -> Result<()> {
self.send_message(cmd.to_message())
}
pub fn listen<F>(&mut self, events: Option<F>) -> Result<()>
where F: Fn(&mut Client, &Message, Option<Event>) {
let reader = BufReader::new(match self.stream {
Some(StreamKind::Plain(ref s)) => StreamKind::Plain((*s).try_clone().unwrap()),
#[cfg(feature = "ssl")]
Some(StreamKind::Ssl(ref s)) => StreamKind::Ssl((*s).try_clone().unwrap()),
None => return Result(Err(IrscError::NotConnected))
});
for line in reader.lines() {
let line = line.unwrap().parse();
if let Ok(msg) = line {
self.handle_event(&msg);
// If a callback is desired, try to parse the message
// into a Command or a Reply, and call back.
if let Some(ref on_event) = events {
let event = match Command::from_message(&msg) {
Some(m) => Some(Event::Command(m)),
None => match Reply::from_message(&msg) {
Some(r) => Some(Event::Reply(r)),
None => None
}
};
on_event(self, &msg, event);
}
}
}
Result(Ok(()))
}
pub fn join(&mut self, channel: &str, password: Option<&str>) -> Result<()> {
self.send_message(JOIN(vec![channel.into()], password.iter().map(|&p| p.into()).collect()).to_message())
}
pub fn msg(&mut self, to: &str, message: &str) -> Result<()> {
self.send_message(PRIVMSG(to.into(), message.into()).to_message())
}
pub fn register(&mut self, nick: &str, user: &str, desc: &str) -> Result<()> {
Result(self.send_message(NICK(nick.into()).to_message()).inner()
.and_then(|_| self.send_message(USER(user.into(), Cow::Borrowed("0"), Cow::Borrowed("*"), desc.into()).to_message()).inner()))
}
}
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