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use std::io::{ self, BufRead, Write };
use std::borrow::ToOwned;
use std::iter::{ Iterator, AdditiveIterator };
use log::Event;
use format::{ Encode, Decode };
use l::LogLevel::Info;
use chrono::*;
pub struct Weechat3;
static TIME_DATE_FORMAT: &'static str = "%Y-%m-%d %H:%M:%S";
pub struct Iter<R> where R: BufRead {
input: R,
buffer: String
}
impl<R> Iterator for Iter<R> where R: BufRead {
type Item = ::Result<Event>;
fn next(&mut self) -> Option<::Result<Event>> {
fn timestamp(date: &str, time: &str) -> i64 {
UTC.datetime_from_str(&format!("{} {}", date, time), TIME_DATE_FORMAT).unwrap().timestamp()
}
fn join(s: &[&str], splits: &[char]) -> String {
let len = s.iter().map(|s| s.len()).sum();
let mut out = s.iter().zip(splits.iter()).fold(String::with_capacity(len),
|mut s, (b, &split)| { s.push_str(b); s.push(split); s });
out.pop(); out
}
fn mask(s: &str) -> String {
s.trim_left_matches('(').trim_right_matches(')').to_owned()
}
loop {
self.buffer.clear();
match self.input.read_line(&mut self.buffer) {
Ok(0) | Err(_) => return None,
Ok(_) => ()
}
let mut split_tokens: Vec<char> = Vec::new();
let tokens = self.buffer.split( |c: char| {
if c.is_whitespace() { split_tokens.push(c); true } else { false }
}).collect::<Vec<_>>();
if log_enabled!(Info) {
info!("Original: `{}`", self.buffer);
info!("Parsing: {:?}", tokens);
}
match tokens[..tokens.len() - 1].as_ref() {
[date, time, "-->", nick, host, "has", "joined", channel, _..] => return Some(Ok(Event::Join {
nick: nick.to_owned(), channel: channel.to_owned(), mask: mask(host),
time: timestamp(date, time)
})),
[date, time, "<--", nick, host, "has", "left", channel, reason..] => return Some(Ok(Event::Part {
nick: nick.to_owned(), channel: channel.to_owned(), mask: mask(host),
reason: mask(&join(reason, &split_tokens[8..])), time: timestamp(date, time)
})),
[date, time, "--", notice, content..]
if notice.starts_with("Notice(")
=> return Some(Ok(Event::Notice {
nick: notice["Notice(".len()..notice.len() - 2].to_owned(),
content: join(content, &split_tokens[4..]),
time: timestamp(date, time)
})),
[date, time, "--", "irc:", "disconnected", "from", "server", _..] => return Some(Ok(Event::Disconnect {
time: timestamp(date, time)
})),
[date, time, sp, "*", nick, msg..]
if sp.is_empty()
=> return Some(Ok(Event::Action {
from: nick.to_owned(), content: join(msg, &split_tokens[5..]),
time: timestamp(date, time)
})),
[date, time, nick, msg..] => return Some(Ok(Event::Msg {
from: nick.to_owned(),
content: join(msg, &split_tokens[3..]),
time: timestamp(date, time)
})),
_ => ()
}
}
}
}
impl<R> Decode<R, Iter<R>> for Weechat3 where R: BufRead {
fn decode(&mut self, input: R) -> Iter<R> {
Iter {
input: input,
buffer: String::new()
}
}
}
impl<W> Encode<W> for Weechat3 where W: Write {
fn encode(&self, mut output: W, event: &Event) -> io::Result<()> {
fn date(t: i64) -> String {
format!("{}", UTC.timestamp(t, 0).format(TIME_DATE_FORMAT))
}
match event {
&Event::Msg { ref from, ref content, ref time } => {
try!(writeln!(&mut output, "{}\t{}\t{}", date(*time), from, content))
},
&Event::Action { ref from, ref content, ref time } => {
try!(writeln!(&mut output, "{}\t *\t{} {}", date(*time), from, content))
},
&Event::Join { ref nick, ref mask, ref channel, ref time } => {
try!(writeln!(&mut output, "{}\t-->\t{} ({}) has joined {}",
date(*time), nick, mask, channel))
},
&Event::Part { ref nick, ref mask, ref channel, ref time, ref reason } => {
try!(write!(&mut output, "{}\t<--\t{} ({}) has left {}",
date(*time), nick, mask, channel));
if reason.len() > 0 {
try!(write!(&mut output, " ({})", reason));
}
try!(write!(&mut output, "\n"))
},
&Event::Quit { ref nick, ref mask, ref time, ref reason } => {
try!(write!(&mut output, "{}\t<--\t{} ({}) has quit", date(*time), nick, mask));
if reason.len() > 0 {
try!(write!(&mut output, " ({})", reason));
}
try!(write!(&mut output, "\n"))
},
&Event::Disconnect { ref time } => {
try!(writeln!(&mut output, "{}\t--\tirc: disconnected from server", date(*time)))
},
&Event::Notice { ref nick, ref content, ref time } => {
try!(writeln!(&mut output, "{}\t--\tNotice({}): {}", date(*time), nick, content))
},
_ => ()
}
Ok(())
}
}
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