Using rust-empty for structure

2 files changed, 271 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..8b385ec
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,86 @@
+#![crate_id = "irc#0.1"]
+#![crate_type = "lib"]
+
+use std::io::net::tcp::TcpStream;
+use std::io::IoResult;
+use std::io::BufferedReader;
+use std::io::IoError;
+
+use msg::Message;
+use msg::cmd;
+
+pub mod msg;
+
+pub struct IrcConnection<'a> {
+	stream: TcpStream,
+	output_sender: Sender<Message>,
+	msg_callback: |&Message, &Sender<Message>|: 'a -> ()
+}
+
+impl<'a> IrcConnection<'a> {
+	pub fn connect<'b>(
+			host: &str, port: u16, nick: String, username: String,
+			real_name: String, msg_callback: |&Message, &Sender<Message>|: 'b -> ()) -> IoResult<IrcConnection<'b>> {
+		
+		let (send_writer, rec_writer) = channel();
+
+		let mut connection = IrcConnection {
+			stream: try!(TcpStream::connect(host, port)),
+			output_sender: send_writer.clone(),
+			msg_callback: msg_callback,
+		};
+
+		let writer = connection.stream.clone();
+		
+		// spawn writer thread
+		spawn(proc() {
+			let mut writer = writer;
+			for msg in rec_writer.iter() {
+				(write!(writer, "{}", msg)).ok().expect("Unable to write to stream");
+			}
+		});
+
+		connection.send(Message::new(cmd::Nick(nick)));
+		connection.send(Message::new(cmd::User(username, 0, real_name)));
+		Ok(connection)
+	}
+
+	pub fn send(&mut self, message: Message) {
+		self.output_sender.send(message);
+	}
+
+	fn on_msg_rec(msg: &Message, sender: &Sender<Message>) {
+		let prefix = &msg.prefix;
+		let cmd = &msg.command;
+		match *cmd {
+			cmd::Ping(ref s) => sender.send(Message::new(cmd::Pong(s.clone()))),
+			_ => { }
+		};
+	}
+
+	pub fn run_loop(&mut self) {
+		let reader = &mut self.stream;
+		loop {
+			fn reader_by_ref<'a, R: Reader>(reader: &'a mut R) -> std::io::RefReader<'a, R> { reader.by_ref() }
+			
+			reader.set_read_timeout(Some(500));
+			let mut buf_reader = BufferedReader::new(reader_by_ref(reader));
+
+			let line = buf_reader.read_line();
+			match line {
+				Ok(line) => match from_str::<Message>(line.as_slice().trim_right()) {
+					Some(msg) => {
+						IrcConnection::on_msg_rec(&msg, &self.output_sender);
+						(self.msg_callback)(&msg, &self.output_sender);
+					},
+					None => println!("Invalid Message recieved"),
+				},
+				Err(IoError{kind: std::io::TimedOut, ..}) => continue,
+				Err(e) => {
+					println!("Unable to read line: {}", e);
+					break;
+				}
+			}
+		}
+	}
+}
diff --git a/src/msg.rs b/src/msg.rs
new file mode 100644
index 0000000..3471d75
--- /dev/null
+++ b/src/msg.rs
@@ -0,0 +1,185 @@
+use std::fmt;
+use std::from_str::FromStr;
+use std::ascii::OwnedStrAsciiExt;
+
+pub mod cmd {
+	#[deriving(Clone, Show)]
+	pub enum Command {
+		Nick(String),
+		User(String, u8, String),
+		Quit(Option<String>),
+		Join(String),
+		Part(String, Option<String>),
+		PrivMsg(String, String),
+		Notice(String, String),
+		//Motd(Option<String>),
+		Ping(String),
+		Pong(String),
+		Error(String),
+		Away(Option<String>),
+		Numeric(u16, Option<String>),
+		UnknownCmd(String, Vec<String>)
+	}
+}
+
+pub struct PrefixHost {
+	hostname: String,
+	user: Option<String>,
+}
+
+pub enum Prefix {
+	PrefixServer(String),
+	PrefixUser(String, Option<PrefixHost>),
+}
+
+#[deriving(Clone)]
+pub struct Message {
+	pub prefix: Option<String>,
+	pub command: cmd::Command,
+}
+
+impl Message {
+	pub fn new(command: cmd::Command) -> Message {
+		Message { prefix: None, command: command }
+	}
+
+	pub fn with_prefix(prefix: String, command: cmd::Command) -> Message {
+		Message { prefix: Some(prefix), command: command }
+	}
+}
+
+impl<'a> fmt::Show for Message {
+	fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+		if self.prefix.is_some() {
+			try!(write!(formatter, ":{} ", self.prefix.get_ref()));
+		}
+
+		match self.command {
+			cmd::Nick(ref nickname) => write!(formatter, "NICK {}", nickname),
+			cmd::User(ref username, mode, ref real_name) => write!(formatter, "USER {} {} * :{}", username, mode, real_name),
+			cmd::Quit(ref msg) => if msg.is_some() { write!(formatter, "QUIT :{}", *msg.get_ref()) } else { write!(formatter, "QUIT") },
+			cmd::Join(ref channel) => write!(formatter, "JOIN :{}", channel),
+			cmd::Part(ref channel, ref msg) => if msg.is_some() { write!(formatter, "PART {} :{}", channel, *msg.get_ref()) } else { write!(formatter, "PART {}", channel) },
+			cmd::PrivMsg(ref target, ref msg) => write!(formatter, "PRIVMSG {} :{}", target, msg),
+			cmd::Notice(ref target, ref msg) => write!(formatter, "NOTICE {} :{}", target, msg),
+			cmd::Ping(ref msg) => write!(formatter, "PING :{}", msg),
+			cmd::Pong(ref msg) => write!(formatter, "PONG :{}", msg),
+			cmd::Error(ref msg) => write!(formatter, "ERROR :{}", msg),
+			cmd::Away(ref msg) => if msg.is_some() { write!(formatter, "AWAY :{}", msg.get_ref()) } else { write!(formatter, "AWAY") },
+			cmd::Numeric(i, ref msg) => if msg.is_some() { write!(formatter, "{:03u} :{}", i, msg.get_ref()) } else { write!(formatter, "{:03u}", i) },
+			cmd::UnknownCmd(ref cmd, ref args) => {
+				try!(write!(formatter, "{}", cmd));
+				let mut iter = args.iter().peekable();
+				loop {
+					match iter.next() {
+						Some(arg) => {
+							try!(
+								if iter.peek().is_some() {
+									write!(formatter, " {}", arg)
+								}
+								else {
+									write!(formatter, " :{}", arg)
+								}
+							)
+						}
+						None => break
+					}
+				}
+				Ok(())
+			}
+		}
+	}
+}
+
+impl FromStr for Message {
+	fn from_str(s: &str) -> Option<Message> {
+		let mut prefix = None;
+		let mut cmd = None;
+		let mut args = Vec::new();
+		let mut current_str: Option<String> = None;
+		let mut is_prefix = false;
+		let mut is_final = false;
+		
+		for c in s.chars() {
+			match c {
+				c if is_final => {
+					current_str.get_mut_ref().push_char(c);
+				}
+				' ' => {
+					if is_prefix {
+						prefix = current_str.take();
+					}
+					else if cmd.is_none() {
+						cmd = current_str.take();
+					}
+					else {
+						args.push(current_str.take_unwrap());
+					}
+					is_prefix = false;
+				}
+				':' if current_str.is_none() => {
+					current_str = Some(String::new());
+					if cmd.is_none() {
+						is_prefix = true;
+					}
+					else {
+						is_final = true;
+					}
+				}
+				c => {
+					if current_str.is_none() {
+						current_str = Some(String::new());
+					}
+					current_str.get_mut_ref().push_char(c)
+				}
+			}
+		}
+
+		args.push(current_str.take_unwrap());
+
+		let cmd = match cmd.map(|s| s.into_ascii_upper()).as_ref().map(|s| s.as_slice()) {
+			Some("NICK") => {
+				if args.len() == 1 { Some(cmd::Nick(args.pop().unwrap())) }
+				else { None }
+			}
+			Some("USER") => {
+				if args.len() == 4 { 
+					let mut iter = args.move_iter();
+					let uname = iter.next().unwrap();
+					let opt_mode: Option<u8> = from_str(iter.next().unwrap().as_slice());
+					iter.next();
+					let fullname = iter.next().unwrap();
+					if opt_mode.is_some() {
+						Some(cmd::User(uname, opt_mode.unwrap(), fullname))
+					}
+					else {
+						None
+					}
+				}
+				else { None }
+			}
+			Some("NOTICE") => {
+				if args.len() == 2 {
+					let mut iter = args.move_iter();
+					Some(cmd::Notice(iter.next().unwrap(), iter.next().unwrap()))
+				}
+				else { None }
+			}
+			Some("PRIVMSG") => {
+				if args.len() == 2 {
+					let mut iter = args.move_iter();
+					Some(cmd::PrivMsg(iter.next().unwrap(), iter.next().unwrap()))
+				}
+				else { None }
+			}
+			Some(other) => {
+				Some(cmd::UnknownCmd(other.to_string(), args))
+			}
+			None => {
+				None
+			}
+		};
+
+		cmd.map(|c| Message { prefix: prefix.take(), command: c })
+	}
+}