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// Copyright 2015 Till Höppner
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::io::{ BufRead, Write };
use std::borrow::{ ToOwned, Cow };
use std::iter::{ Iterator };
use event::{ Event, Type, Time };
use context::Context;
use format::{ Encode, Decode, rejoin, strip_one };
use l::LogLevel::Info;
use chrono::*;
pub struct Energymech;
static TIME_FORMAT: &'static str = "%H:%M:%S";
pub struct Iter<'a, R: 'a> where R: BufRead {
context: &'a Context,
input: R,
buffer: String
}
impl<'a, R: 'a> Iterator for Iter<'a, R> where R: BufRead {
type Item = ::Result<Event<'a>>;
fn next(&mut self) -> Option<::Result<Event<'a>>> {
fn parse_time(context: &Context, time: &str) -> Time {
let h = time[1..3].parse::<u32>().unwrap();
let m = time[4..6].parse::<u32>().unwrap();
let s = time[7..9].parse::<u32>().unwrap();
if let Some(date) = context.override_date {
Time::Timestamp(context.timezone.from_local_date(&date)
.and_time(NaiveTime::from_hms(h, m, s))
.single()
.expect("Transformed log times can't be represented, due to timezone transitions")
.timestamp())
} else {
Time::Hms(h as u8, m as u8, s as u8)
}
}
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] {
[time, "*", nick, content..] => return Some(Ok(Event {
ty: Type::Action {
from: nick.to_owned().into(),
content: rejoin(content, &split_tokens[3..])
},
time: parse_time(&self.context, time),
channel: self.context.channel.clone().map(Into::into)
})),
[time, "***", old, "is", "now", "known", "as", new] => return Some(Ok(Event {
ty: Type::Nick {
old_nick: old.to_owned().into(),
new_nick: new.to_owned().into()
},
time: parse_time(&self.context, time),
channel: self.context.channel.clone().map(Into::into)
})),
[time, "***", nick, "sets", "mode:", mode, masks..] => return Some(Ok(Event {
ty: Type::Mode {
nick: Some(nick.to_owned().into()),
mode: mode.to_owned().into(),
masks: rejoin(&masks, &split_tokens[6..]).to_owned().into()
},
time: parse_time(&self.context, time),
channel: self.context.channel.clone().map(Into::into)
})),
[time, "***", "Joins:", nick, host] => return Some(Ok(Event {
ty: Type::Join {
nick: nick.to_owned().into(),
mask: Some(strip_one(host).into())
},
time: parse_time(&self.context, time),
channel: self.context.channel.clone().map(Into::into)
})),
[time, "***", "Parts:", nick, host, reason..] => return Some(Ok(Event {
ty: Type::Part {
nick: nick.to_owned().into(),
mask: Some(strip_one(host).into()),
reason: Some(strip_one(&rejoin(reason, &split_tokens[5..])).into())
},
time: parse_time(&self.context, time),
channel: self.context.channel.clone().map(Into::into)
})),
[time, "***", "Quits:", nick, host, reason..] => return Some(Ok(Event {
ty: Type::Quit {
nick: nick.to_owned().into(),
mask: Some(strip_one(host).into()),
reason: Some(strip_one(&rejoin(reason, &split_tokens[5..])).into())
},
time: parse_time(&self.context, time),
channel: self.context.channel.clone().map(Into::into)
})),
[time, "***", nick, "changes", "topic", "to", topic..] => return Some(Ok(Event {
ty: Type::TopicChange {
nick: Some(nick.to_owned().into()),
new_topic: strip_one(&rejoin(topic, &split_tokens[6..])).into()
},
time: parse_time(&self.context, time),
channel: self.context.channel.clone().map(Into::into)
})),
[time, nick, content..]
if nick.starts_with('<') && nick.ends_with('>')
=> return Some(Ok(Event {
ty: Type::Msg {
from: strip_one(nick).into(),
content: rejoin(content, &split_tokens[2..])
},
time: parse_time(&self.context, time),
channel: self.context.channel.clone().map(Into::into)
})),
_ => ()
}
}
}
}
impl<'a, R: 'a> Decode<'a, R> for Energymech where R: BufRead {
type Output = Iter<'a, R>;
fn decode(&'a mut self, context: &'a Context, input: R) -> Iter<R> {
Iter {
context: context,
input: input,
buffer: String::new()
}
}
}
impl<'a, W> Encode<'a, W> for Energymech where W: Write {
fn encode(&'a self, context: &'a Context, mut output: W, event: &'a Event) -> ::Result<()> {
match event {
&Event { ty: Type::Msg { ref from, ref content }, ref time, .. } => {
try!(writeln!(&mut output, "[{}] <{}> {}",
time.with_format(&context.timezone, TIME_FORMAT), from, content))
},
&Event { ty: Type::Action { ref from, ref content }, ref time, .. } => {
try!(writeln!(&mut output, "[{}] * {} {}",
time.with_format(&context.timezone, TIME_FORMAT), from, content))
},
&Event { ty: Type::Nick { ref old_nick, ref new_nick }, ref time, .. } => {
try!(writeln!(&mut output, "[{}] *** {} is now known as {}",
time.with_format(&context.timezone, TIME_FORMAT), old_nick, new_nick))
},
&Event { ty: Type::Mode { ref nick, ref mode, ref masks }, ref time, .. } => {
try!(writeln!(&mut output, "[{}] *** {} sets mode: {} {}",
time.with_format(&context.timezone, TIME_FORMAT),
nick.as_ref().expect("Nickname not present, but required."),
mode, masks))
},
&Event { ty: Type::Join { ref nick, ref mask }, ref time, .. } => {
try!(writeln!(&mut output, "[{}] *** Joins: {} ({})",
time.with_format(&context.timezone, TIME_FORMAT), nick,
mask.as_ref().expect("Mask not present, but required.")))
},
&Event { ty: Type::Part { ref nick, ref mask, ref reason }, ref time, .. } => {
try!(writeln!(&mut output, "[{}] *** Parts: {} ({}) ({})",
time.with_format(&context.timezone, TIME_FORMAT), nick,
mask.as_ref().expect("Mask not present, but required."),
reason.as_ref().unwrap_or(&Cow::Borrowed(""))))
},
&Event { ty: Type::Quit { ref nick, ref mask, ref reason }, ref time, .. } => {
try!(writeln!(&mut output, "[{}] *** Quits: {} ({}) ({})",
time.with_format(&context.timezone, TIME_FORMAT), nick,
mask.as_ref().expect("Mask not present, but required."),
reason.as_ref().expect("Reason not present, but required.")))
},
&Event { ty: Type::TopicChange { ref nick, ref new_topic }, ref time, .. } => {
try!(writeln!(&mut output, "[{}] *** {} changes topic to '{}'",
time.with_format(&context.timezone, TIME_FORMAT),
nick.as_ref().expect("Nick not present, but required."),
new_topic))
},
_ => ()
}
Ok(())
}
}
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