operprefix + ojoin: server oper prefix (!/mode y, above owner) auto-granted to opers + OJOIN command

src/modules/ojoin.rs

@@ -0,0 +1,55 @@
+//! ojoin — `OJOIN <channel>`: an oper joins a channel as network staff, taking the
+//! oper prefix (`!`, mode `y`, above owner) and — unless `ojoin_op = no` — channel
+//! op. The prefix's rank protects them from being kicked/deopped. Off unless
+//! `ojoin = yes`.
+
+use crate::command::{CmdResult, Command};
+use crate::numeric::ERR_NOPRIVILEGES;
+use crate::server::Server;
+use crate::Uid;
+
+pub fn commands() -> Vec<Box<dyn Command>> {
+    vec![Box::new(OjoinCmd)]
+}
+
+struct OjoinCmd;
+impl Command for OjoinCmd {
+    fn name(&self) -> &'static str {
+        "OJOIN"
+    }
+    fn min_params(&self) -> usize {
+        1
+    }
+    fn handle(&self, s: &mut Server, uid: Uid, params: &[String]) -> CmdResult {
+        let nick = s.users.get(&uid).map(|u| u.nick.clone()).unwrap_or_default();
+        if !s.is_oper(uid) {
+            s.numeric(
+                uid,
+                ERR_NOPRIVILEGES,
+                ":Permission Denied- You're not an IRC operator",
+            );
+            return CmdResult::Fail;
+        }
+        if !s.conf_bool("ojoin", false) {
+            s.send(
+                uid,
+                format!(":{} NOTICE {nick} :*** OJOIN is not enabled on this server.", s.name),
+            );
+            return CmdResult::Fail;
+        }
+        let chan = params[0].clone();
+        let key = chan.to_ascii_lowercase();
+        if !s.is_member(uid, &key) {
+            s.join(uid, &chan, None);
+        }
+        if !s.is_member(uid, &key) {
+            return CmdResult::Fail; // join was refused (bad name, etc.)
+        }
+        crate::modules::operprefix::grant(s, uid, &key);
+        if s.conf_bool("ojoin_op", true) {
+            crate::coremods::core_mode::svs_set_chan_modes(s, &chan, "+o", &[nick.clone()]);
+        }
+        s.snotice(&format!("{nick} used OJOIN to enter {chan}"));
+        CmdResult::Ok
+    }
+}