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|
use anyhow::{anyhow, Context, Result};
use irc::client::prelude::*;
use sedregex::ReplaceCommand;
use std::collections::HashMap;
static LOG_MAX_SIZE: usize = 10000;
thread_local!(static RE: regex::Regex = regex::Regex::new(r"^s/").unwrap());
pub struct Sed(HashMap<String, Vec<(String, String)>>);
impl Sed {
pub fn new() -> Sed {
Sed(HashMap::new())
}
pub fn log(&mut self, _bot: &crate::Bot, msg: Message) {
match self.log_msg(msg) {
Ok(_) => (),
Err(err) => tracing::error!("failed to log new message: {:?}", err),
}
}
fn log_msg(&mut self, msg: Message) -> Result<()> {
if let Command::PRIVMSG(target, text) = msg.command.clone() {
match self.0.get_mut(&target) {
Some(log) => {
if log.len() >= LOG_MAX_SIZE {
let _ = log.remove(0);
}
log.push((msg.source_nickname().unwrap().to_string(), text))
}
None => {
let mut log = Vec::with_capacity(LOG_MAX_SIZE);
log.push((msg.source_nickname().unwrap().to_string(), text));
self.0.insert(target, log);
}
}
}
Ok(())
}
pub fn replace(&mut self, bot: &crate::Bot, msg: Message) {
match self.find_and_replace(&msg) {
Ok(res) => match bot.send_privmsg(msg.response_target().unwrap(), res.as_str()) {
Ok(_) => (),
Err(_) => tracing::error!(
"failed to send message: \"{:?}\" to channel: {:?}",
msg.response_target().unwrap(),
res
),
},
Err(_) => tracing::debug!("did not find match for: {:?}", msg),
}
}
fn find_and_replace(&mut self, msg: &Message) -> Result<String> {
if let Command::PRIVMSG(target, text) = msg.command.clone() {
let cmd = match ReplaceCommand::new(text.as_str()) {
Ok(cmd) => cmd,
Err(_) => return Err(anyhow!("building replace command failed")),
};
let log = self
.0
.get(&target)
.context("did not find log for current channel")?;
return log
.iter()
.rev()
.find(|(_, text)| cmd.expr.is_match(text) && !RE.with(|re| re.is_match(text)))
.and_then(|(nick, text)| Some(format!("<{}> {}", nick, cmd.execute(text))))
.map_or(Err(anyhow!("replace failed")), |v| Ok(v));
}
Err(anyhow!("not a privmsg"))
}
}
#[cfg(test)]
mod tests {
use super::*;
use test::Bencher;
fn populate_log() -> Sed {
let mut sed = Sed::new();
sed.log_msg(
Message::new(
Some("user!user@user.com"),
"PRIVMSG",
vec!["user", "this is a long message which will be replaced"],
)
.unwrap(),
)
.unwrap();
for _ in 0..LOG_MAX_SIZE - 1 {
sed.log_msg(
Message::new(
Some("user!user@user.com"),
"PRIVMSG",
vec!["user", "this is a long message which doesn't matter"],
)
.unwrap(),
)
.unwrap();
}
return sed;
}
#[test]
fn test_log_push_max() {
let mut sed = Sed::new();
sed.log_msg(
Message::new(Some("user!user@user.com"), "PRIVMSG", vec!["user", "one"]).unwrap(),
)
.unwrap();
for _ in 0..LOG_MAX_SIZE - 2 {
sed.log_msg(
Message::new(Some("user!user@user.com"), "PRIVMSG", vec!["user", "two"]).unwrap(),
)
.unwrap();
}
sed.log_msg(
Message::new(Some("user!user@user.com"), "PRIVMSG", vec!["user", "three"]).unwrap(),
)
.unwrap();
{
let log = sed.0.get("user").unwrap();
assert_eq!(
log[LOG_MAX_SIZE - 1],
("user".to_string(), "three".to_string())
);
assert_eq!(log[0], ("user".to_string(), "one".to_string()));
}
sed.log_msg(
Message::new(Some("user!user@user.com"), "PRIVMSG", vec!["user", "four"]).unwrap(),
)
.unwrap();
{
let log = sed.0.get("user").unwrap();
assert_eq!(
log[LOG_MAX_SIZE - 1],
("user".to_string(), "four".to_string())
);
assert_eq!(log[0], ("user".to_string(), "two".to_string()));
}
}
#[test]
fn test_log_limit() {
let mut sed = populate_log();
{
let log = sed.0.get("user").unwrap();
assert_eq!(log.len(), LOG_MAX_SIZE);
}
sed.log_msg(
Message::new(
Some("user!user@user.com"),
"PRIVMSG",
vec!["user", "this is the 10001th message"],
)
.unwrap(),
)
.unwrap();
{
let log = sed.0.get("user").unwrap();
assert_eq!(log.len(), LOG_MAX_SIZE);
}
}
#[test]
fn test_replace() {
let mut sed = populate_log();
assert_eq!(
sed.find_and_replace(&Message {
tags: None,
prefix: None,
command: Command::PRIVMSG("user".to_string(), "s/will be/has been/".to_string(),),
})
.unwrap(),
"<user> this is a long message which has been replaced"
)
}
#[test]
fn test_replace_complex() {
let mut sed = populate_log();
assert_eq!(
sed.find_and_replace(&Message {
tags: None,
prefix: None,
command: Command::PRIVMSG("user".to_string(), "s/(will).*(be)/$2 $1/".to_string(),),
})
.unwrap(),
"<user> this is a long message which be will replaced"
)
}
#[bench]
fn bench_replace(b: &mut Bencher) {
let mut sed = populate_log();
b.iter(|| {
sed.find_and_replace(&Message {
tags: None,
prefix: None,
command: Command::PRIVMSG("user".to_string(), "s/will be/has been/".to_string()),
})
});
}
#[bench]
fn bench_replace_complex(b: &mut Bencher) {
let mut sed = populate_log();
b.iter(|| {
sed.find_and_replace(&Message {
tags: None,
prefix: None,
command: Command::PRIVMSG("user".to_string(), "s/(will).*(be)/$2 $1/".to_string()),
})
});
}
}
|
