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BotServ: TRIGGER — regex auto-responses

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TRIGGER <#channel> ADD <regex>|<response> | DEL <num> | LIST | CLEAR: when
a channel line matches <regex>, the assigned bot says <response> ($nick
becomes the speaker's nick). Only the first matching trigger fires, and a
line the bot just kicked for gets no response.

Same engine machinery as badwords: patterns compile into one RegexSet per
channel (linear-time, ReDoS-safe), cached and rebuilt only on a revision
change. Patterns validated + size-limited at add time.
This commit is contained in:
Jean Chevronnet 2026-07-13 18:03:46 +00:00
parent 47b1fd351e
commit 929a4cdd92
No known key found for this signature in database
6 changed files with 237 additions and 4 deletions
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5
botserv/src/lib.rs
View file

@ -20,6 +20,8 @@ mod kick;
mod badwords;
#[path = "copy.rs"]
mod copy;
#[path = "trigger.rs"]
mod trigger;
// Shared gate: the sender may administer <chan>'s bot options only as its
// founder or a services admin. Notices and returns false on failure.
@ -63,7 +65,8 @@ impl Service for BotServ {
Some("KICK") => kick::handle(me, from, args, ctx, db),
Some("BADWORDS") => badwords::handle(me, from, args, ctx, db),
Some("COPY") => copy::handle(me, from, args, ctx, db),
Some("HELP") | None => ctx.notice(me, from.uid, "BotServ keeps service bots for your channels: \x02ASSIGN\x02 <#channel> <bot> puts a bot in your channel, \x02UNASSIGN\x02 <#channel> removes it, \x02INFO\x02 <bot|#channel> shows details, \x02SAY\x02/\x02ACT\x02 <#channel> <text> speaks through the bot, \x02SET\x02 <#channel> GREET <on|off> toggles greets, \x02KICK\x02 <#channel> <type> <on|off> configures kickers, \x02BADWORDS\x02 <#channel> ADD|DEL|LIST manages badword regexes. Operators also have \x02BOT\x02 ADD|DEL|LIST."),
Some("TRIGGER") => trigger::handle(me, from, args, ctx, db),
Some("HELP") | None => ctx.notice(me, from.uid, "BotServ keeps service bots for your channels: \x02ASSIGN\x02 <#channel> <bot> puts a bot in your channel, \x02UNASSIGN\x02 <#channel> removes it, \x02INFO\x02 <bot|#channel> shows details, \x02SAY\x02/\x02ACT\x02 <#channel> <text> speaks through the bot, \x02SET\x02 <#channel> GREET <on|off> toggles greets, \x02KICK\x02 <#channel> <type> <on|off> configures kickers (with \x02TEST\x02/\x02WARN\x02/\x02TTB\x02), \x02BADWORDS\x02 and \x02TRIGGER\x02 <#channel> ADD|DEL|LIST manage badword regexes and auto-responses, \x02COPY\x02 <#src> <#dst> clones settings. Operators also have \x02BOT\x02 ADD|CHANGE|DEL|LIST."),
Some(other) => ctx.notice(me, from.uid, format!("I don't know the command \x02{other}\x02. Try \x02HELP\x02.")),
}
}

66
botserv/src/trigger.rs Normal file
View file

@ -0,0 +1,66 @@
use fedserv_api::{ChanError, Sender, ServiceCtx, Store};
// TRIGGER <#channel> ADD <regex>|<response> | DEL <num> | LIST | CLEAR: manage
// the channel's auto-responses. When a line matches <regex>, the assigned bot
// says <response> ($nick becomes the speaker's nick). Founder-or-admin.
pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db: &mut dyn Store) {
let Some(&chan) = args.get(1) else {
ctx.notice(me, from.uid, "Syntax: TRIGGER <#channel> ADD <regex>|<response> | DEL <num> | LIST | CLEAR");
return;
};
if !super::require_channel_admin(me, from, chan, ctx, db) {
return;
}
match args.get(2).map(|s| s.to_ascii_uppercase()).as_deref() {
Some("ADD") => {
// Everything after ADD is "<regex>|<response>".
let rest = args[3..].join(" ");
let Some((pattern, response)) = rest.split_once('|') else {
ctx.notice(me, from.uid, "Syntax: TRIGGER <#channel> ADD <regex>|<response> (e.g. (?i)hello|Hi $nick!)");
return;
};
let (pattern, response) = (pattern.trim(), response.trim());
if pattern.is_empty() || response.is_empty() {
ctx.notice(me, from.uid, "Both a pattern and a response are required: ADD <regex>|<response>.");
return;
}
match db.trigger_add(chan, pattern, response) {
Ok(true) => ctx.notice(me, from.uid, format!("Added a trigger to \x02{chan}\x02.")),
Ok(false) => ctx.notice(me, from.uid, "That pattern already has a trigger."),
Err(ChanError::InvalidPattern) => ctx.notice(me, from.uid, format!("\x02{pattern}\x02 isn't a valid regular expression.")),
Err(_) => reg_error(me, from, chan, ctx),
}
}
Some("DEL") => {
let Some(n) = args.get(3).and_then(|s| s.parse::<usize>().ok()) else {
ctx.notice(me, from.uid, "Syntax: TRIGGER <#channel> DEL <num> (see LIST)");
return;
};
match db.trigger_del(chan, n) {
Ok(true) => ctx.notice(me, from.uid, format!("Trigger #\x02{n}\x02 removed from \x02{chan}\x02.")),
Ok(false) => ctx.notice(me, from.uid, format!("\x02{chan}\x02 has no trigger #\x02{n}\x02.")),
Err(_) => reg_error(me, from, chan, ctx),
}
}
Some("CLEAR") => match db.trigger_clear(chan) {
Ok(n) => ctx.notice(me, from.uid, format!("Cleared \x02{n}\x02 trigger(s) from \x02{chan}\x02.")),
Err(_) => reg_error(me, from, chan, ctx),
},
None | Some("LIST") => {
let triggers = db.triggers(chan);
if triggers.is_empty() {
ctx.notice(me, from.uid, format!("\x02{chan}\x02 has no triggers."));
return;
}
ctx.notice(me, from.uid, format!("Triggers for \x02{chan}\x02 ({}):", triggers.len()));
for (i, t) in triggers.iter().enumerate() {
ctx.notice(me, from.uid, format!(" {}. {} \x02→\x02 {}", i + 1, t.pattern, t.response));
}
}
Some(other) => ctx.notice(me, from.uid, format!("Unknown TRIGGER command \x02{other}\x02. Use ADD, DEL, LIST or CLEAR.")),
}
}
fn reg_error(me: &str, from: &Sender, chan: &str, ctx: &mut ServiceCtx) {
ctx.notice(me, from.uid, format!("Couldn't update \x02{chan}\x02 — please try again in a moment."));
}