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|
use std::{io, str};
use std::collections::hashmap::HashMap;
use constants::{MessageType, Nick, Pass, Ping, Pong, User};
use message::Message;
type Callback<'a, 'b> = Box<Fn<(&'a mut Client<'a, 'b>, &'b Message), ()> + 'static>;
#[deriving(PartialEq, Eq, Hash, Clone)]
pub enum CallbackEvent {
MessageEvent(MessageType),
AnyMessageEvent,
// XXX timer? connect/disconnect?
}
// XXX these lifetime parameters make no sense at all, but appear to be
// necessary for now...
pub struct ClientBuilder<'a, 'b> {
nick: String,
pass: Option<String>,
realname: String,
username: String,
hostname: Option<String>,
servername: String,
port: u16,
callbacks: HashMap<CallbackEvent, Vec<Callback<'a, 'b>>>,
}
pub struct Client<'a, 'b> {
conn: io::BufferedStream<io::TcpStream>,
callbacks: HashMap<CallbackEvent, Vec<Callback<'a, 'b>>>,
}
impl<'a, 'b> ClientBuilder<'a, 'b> {
pub fn new (nick: &str, servername: &str) -> ClientBuilder<'a, 'b> {
let mut callbacks = HashMap::new();
callbacks.insert(
MessageEvent(Ping),
vec![
box () (|&: client: &mut Client, m: &Message| {
client.write(Message::new(None, Pong, m.params().clone()));
}) as Callback
]
);
ClientBuilder {
nick: nick.to_string(),
pass: None,
realname: nick.to_string(),
username: nick.to_string(),
hostname: None,
servername: servername.to_string(),
port: 6667,
callbacks: callbacks,
}
}
pub fn set_pass (&mut self, pass: &str) -> &mut ClientBuilder<'a, 'b> {
self.pass = Some(pass.to_string());
self
}
pub fn set_username (&mut self, username: &str) -> &mut ClientBuilder<'a, 'b> {
self.username = username.to_string();
self
}
pub fn set_realname (&mut self, realname: &str) -> &mut ClientBuilder<'a, 'b> {
self.realname = realname.to_string();
self
}
pub fn set_hostname (&mut self, hostname: &str) -> &mut ClientBuilder<'a, 'b> {
self.hostname = Some(hostname.to_string());
self
}
pub fn set_port (&mut self, port: u16) -> &mut ClientBuilder<'a, 'b> {
self.port = port;
self
}
pub fn remove_all_callbacks (&mut self) -> &mut ClientBuilder<'a, 'b> {
self.callbacks.clear();
self
}
pub fn add_callback (&mut self, cb_type: CallbackEvent, cb: Callback<'a, 'b>) -> &mut ClientBuilder<'a, 'b> {
self.callbacks.find_or_insert(cb_type.clone(), vec![]);
self.callbacks.get_mut(&cb_type).push(cb);
self
}
pub fn connect (self) -> Client<'a, 'b> {
let nick = self.nick.clone();
let pass = self.pass.clone();
let hostname = match self.hostname {
Some(ref host) => host.clone(),
None => {
// XXX get the name of the local end of the connection
"localhost".to_string()
},
};
let username = self.username.clone();
let servername = self.servername.clone();
let realname = self.realname.clone();
let mut client = self.connect_raw();
match pass {
Some(pass) => {
client.write(Message::new(None, Pass, vec![pass]));
},
None => {},
}
client.write(Message::new(None, Nick, vec![nick]));
client.write(
Message::new(
None, User, vec![ username, hostname, servername, realname ],
)
);
client
}
pub fn connect_raw (self) -> Client<'a, 'b> {
let mut stream = io::TcpStream::connect(self.servername.as_slice(), self.port);
Client {
conn: io::BufferedStream::new(stream.unwrap()),
callbacks: self.callbacks,
}
}
}
impl<'a, 'b> Client<'a, 'b> {
pub 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()
}
pub fn write (&mut self, msg: Message) {
msg.write_protocol_string(&mut self.conn);
}
pub fn run_loop (&'a mut self) {
loop {
let res = self.read();
match self.callbacks.find(&AnyMessageEvent) {
Some(cbs) => {
for cb in cbs.iter() {
(*cb).call((self, &res));
}
},
None => {},
}
match self.callbacks.find(&MessageEvent(res.message_type().clone())) {
Some(cbs) => {
for cb in cbs.iter() {
(*cb).call((self, &res));
}
},
None => {},
}
}
}
}
|
