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|
use std::{io, str};
use constants::{Nick, Pass, User};
use message::Message;
pub struct ClientBuilder<T: Client> {
nick: String,
pass: Option<String>,
realname: String,
username: String,
hostname: Option<String>,
servername: String,
port: u16,
}
impl<T: Client> ClientBuilder<T> {
pub fn new (nick: &str, servername: &str) -> ClientBuilder<T> {
ClientBuilder {
nick: nick.to_string(),
pass: None,
realname: nick.to_string(),
username: nick.to_string(),
hostname: None,
servername: servername.to_string(),
port: 6667,
}
}
pub fn set_pass (&mut self, pass: &str) -> &mut ClientBuilder<T> {
self.pass = Some(pass.to_string());
self
}
pub fn set_username (&mut self, username: &str) -> &mut ClientBuilder<T> {
self.username = username.to_string();
self
}
pub fn set_realname (&mut self, realname: &str) -> &mut ClientBuilder<T> {
self.realname = realname.to_string();
self
}
pub fn set_hostname (&mut self, hostname: &str) -> &mut ClientBuilder<T> {
self.hostname = Some(hostname.to_string());
self
}
pub fn set_port (&mut self, port: u16) -> &mut ClientBuilder<T> {
self.port = port;
self
}
pub fn connect (self) -> T {
let mut stream = io::TcpStream::connect(self.servername.as_slice(), self.port);
let mut stream = stream.unwrap();
let socket_name = match stream.socket_name() {
Ok(addr) => Some(addr.ip.to_string()),
Err(_) => None,
};
Client::new(self, io::BufferedStream::new(stream), socket_name)
}
}
pub trait Client {
fn new (builder: ClientBuilder<Self>, conn: io::BufferedStream<io::TcpStream>, socket_name: Option<String>) -> Self;
fn builder (&self) -> &ClientBuilder<Self>;
fn conn (&mut self) -> &mut io::BufferedStream<io::TcpStream>;
fn socket_name (&self) -> Option<&str>;
fn read (&mut self) -> Message {
// \n isn't valid inside a message, so this should be fine. if the \n
// we find isn't preceded by a \r, this will be caught by the message
// parser.
let buf = self.conn().read_until(b'\n');
// XXX handle different encodings
// XXX proper error handling
Message::parse(str::from_utf8(buf.unwrap().as_slice()).unwrap()).unwrap()
}
fn write (&mut self, msg: Message) {
msg.write_protocol_string(self.conn());
}
fn run_loop_with (mut self, handler: |&mut Self, Message|) -> Self {
loop {
let m = self.read();
handler(&mut self, m);
}
self
}
// XXX once storing closures in structs works, we'll also want to provide
// a default CallbackClient impl of Client to allow users to not have to
// worry about the struct layout for simple cases.
fn run_loop (mut self) {
Client::on_connect(&mut self);
let mut client = self.run_loop_with(|client, m| {
Client::on_message(client, m);
});
Client::on_disconnect(&mut client);
}
fn on_connect (client: &mut Self) {
let nick = client.builder().nick.clone();
let pass = client.builder().pass.clone();
let username = client.builder().username.clone();
let servername = client.builder().servername.clone();
let realname = client.builder().realname.clone();
match pass {
Some(pass) => {
client.write(Message::new(None, Pass, vec![pass]));
},
None => {},
}
client.write(Message::new(None, Nick, vec![nick]));
let hostname = match client.builder().hostname {
Some(ref host) => host.clone(),
None => {
match client.socket_name() {
Some(ref host) => host.to_string(),
// XXX something better here?
None => "localhost".to_string(),
}
},
};
client.write(
Message::new(
None, User, vec![ username, hostname, servername, realname ],
)
);
}
fn on_disconnect (client: &mut Self) { }
fn on_message (client: &mut Self, m: Message) { }
}
|
